fusible resistor selection

Mouser offers inventory, pricing, & datasheets for fusible resistor Metal Film Resistors - Through Hole. This axial leaded series is an integrated solution as it provides both inrush current protection and fusible overcurrent protection. Fusible resistor selection Reply to Thread. Dimensions are in millimetres unless otherwise specified. Resistance to Soldering heat ¨5 5 ZLWK QR HYLGHQFH RI PHFKDQLFDO GDPDJH Fuse resistors are electronic components which, in addition to their typical role, have an important protective function. Mouser offers inventory, pricing, & datasheets for fusible resistor. Showing 101 - 147. The less expensive wirewounds blow faster than films and open completely. Variable Resistor: A variable resistor has 3 components, 2 of which are fixed, and the 3rd is a slider which is meant for adjusting. FWxxA Series Fusible Power Resistors Fusing Performance Temperature Rise Power Derating Curve Pulse Performance 1.2/50 μs Peak Voltage Limit (10 pulses at 10 sec. Although metal-film fusing resistors are much less precise than most wirewounds, they are generally less expensive. The film resistor of low resistance value blows the fastest, while the wirewound high values fuse more quickly. 0000087554 00000 n Since two functions performed by one resistor, the cost therefore saved. Fusible resistor series is a new type of component, it is a compound function resistor with the dual function of resistor and fuse. • Resistor chip arrays- arrays of several resistors housed in a single package. Search Forums; Recent Posts; Scroll to continue with content. 0000007242 00000 n A fusible resistor can pass the pulse of a high voltage of 500v without failure. For all of these requirements, the fusible wirewound resistor is a better choice. Fusing-resistor operation One of the desirable characteristics of fusing resistors is that they are dual-purpose devices: they perform the functions of both a resistor and a fuse in the same package, thus saving the cost and space that would be required to mount those separate components. 0000007642 00000 n •Resistor-capacitor (RC) networks- integrated circuits (ICs) that contain RC arrays in a single chip. This is because the wirewound resistance element at low values is considerably larger than the wire used for high values. They identified it as a: 1/2 watt 300 volt 0R5 ohm (FRN) metal/carbon film Fusible resistor I've tried all the usual places e.g. Of these characteristics, the type of material used as the resistance element controls the most important parameter: the melting temperature of the material. How much of an overload is required to open the resistor depends on several factors, such as the type and mass of the resistance material, the core composition, lead material and diameter, ambient temperature, and airflow across the resistor. • Resistor-capacitor-diode (RCD) networks- ICs that … # Fusible resistor replaces resistor + fuse combination in mains. 0000007429 00000 n The slider is like a devil’s advocate in the sense it champions the alternating current. fusible resistor Metal Film Resistors - Through Hole are available at Mouser Electronics. As long as the resistor is not subjected to currents in excess of the rated steady-state current, the product operates as a resistor. Fuse & Fusible Resistor from Changzhou Southern Electronic Element Factory Co., Ltd.. Search High Quality Fuse & Fusible Resistor Manufacturing and Exporting supplier on Alibaba.com. When the circuit works normally, it acts as a resistor; when the circuit fails, when the current flowing through the fuse resistor reaches a certain level, the fuse resistor quickly blows, acting as an over current fuse. Once the steady-state current is exceeded, the resistor may fuse to open the circuit. A portion of the resistive film is removed to form a pair of resistor sections separated by an insulating gap. Resistors can be classified based on their configuration. 0000007830 00000 n Wirewound technology can offer a much more precise degree of control over blow parameters than films or the less-expensive wirewounds discussed previously. Axial leads operate as heat sinks, drawing heat from the resistor body and shunting it into the pc board. The fusing characteristic is measured under constant voltage. Passives > Resistors > Fusible Resistors. The higher-resistance values typically blow from 4 times rated power in 60 to 100 s to 20 times rated power in 5 to 60 s. The lower values may take 5 to 10 times rated power to blow within 100 s or 20 times rated power to blow within 20 s (saee Fig. Terminal strength No evidence of mechanical damage. 1. Fusing resistors are available in several different technologies and many different configurations. fusible Resistors are available at Mouser Electronics. Other factors, to varying degrees, affect the amount of time it takes for the material to reach that temperature. (line) input applications. Its benefits are the ability to hit a tight blow window by using different cores, wire, and other proprietary techniques. tycoelectronics.com passives.tycoelectronics.com Flame-Proof Fusible Resistors Type FRN Series 0000043251 00000 n 0000119185 00000 n Wirewound technology offers the designer much more control over fusing power and time, although some less expensive wirewound fusing resistors offer characteristics quite similar to film products. 0000001826 00000 n Back Filter Options. 0000067626 00000 n As adherence to safety agency requirements such as UL, CSA, and TUV are adopted by more manufacturers and their customers, the growth of products designed to open a circuit should continue. Another important characteristic of film fusing resistors is that, in some cases, these resistors do not completely open–especially at the lesser overloads within the band–but increase in resistance value to a new level specified by some products to be more than 50 times the initial value. Core composition is critical, as different materials dissipate the heat created by the overloaded element with varying efficiency. The generator voltage will be higher due to the generator’s internal impedance. FUSING CHARACTERISTIC The resistors will fuse without the risk of fire and within an indicated range of overload. The cost may be justified due to the speed and precision of the blow time, as this product is usually applied in applications where it is triggering a missile circuit or offering fast overload protection for semiconductors and other components worth hundreds of dollars. Wirewound resistors. This fusible resistor used in the circuit operates high voltage with small or lower current such as 100ma, 250ma. These products will undoubtedly replace the 1/4- and 1/2-W axial films more than the higher wattage and precision wirewounds. China Fusible resistor catalog of Wire-Wound Fusible Resistor 0.5W 250V 35Ω, Thermal Fuse Built-in Resistor provided by China manufacturer - Shenzhen Topmay Electronic Co., Ltd., page1. Film fusing resistors are generally less precise than wirewounds in defining what overload is required to fuse the resistor within a specific time span. Future developments The next development in the evolution of the fusing resistor will be in the surface-mount arena. H�b```f``�d`e`�qab@ !��&�F� �Һ�Rn�W�9"� Z�t{�2����k��0` �v�DN���"3B�f(I�ĄC��zL>O�4��6=p'�a��BV����"�C�'NkW��Q�2��7���oʊԥW]LOH��y|��dJh��E��'yZ�sT]�Zr#p�T�`� �8-���g�. 0000003873 00000 n 0000098636 00000 n 0000004920 00000 n 0000004685 00000 n One characteristic that is different is the time required to fuse relative to resistance value–in wirewound parts this characteristic is reversed compared to that of film resistors. A handful of manufacturers already have introduced products ranging from a surface-mount fusible MELF (an axial film without the leads) to thick-film flat chips. Mouser offers inventory, pricing, & datasheets for fusible resistor. A cermet resistive film is deposited on an alumina substrate to form a fixed resistance between a pair of spaced termination points. fusible resistor are available at Mouser Electronics. FUSIBLE RESISTOR - Futaba Electric Co., Ltd. FUSIBLE RESISTOR (Standard Type) FUSIBLE RESISTOR (Small Type) Fusible wirewound technology can be used to tailor the fusing performance characteristic to match the design guidelines of many different end products and markets. This consideration is important because current continues to flow in the circuit. # UL recognised. 0000007027 00000 n Additional Feature FLAME PROOF PRECISION. 0000090691 00000 n Specifications subject to change. The wirewound product is usually matched with some type of thermal cutoff mounted in the same package, and is strong enough to withstand repeated lightning pulses, which are of such a short duration that the thermal fuse does not heat up enough to open. Fusible Through-Hole Resistors Designed to protect circuit from abrupt transients and meet safety requirements Yageo offers complete range of fusible resistors which operate both as a normal resistor and as a fuse. %PDF-1.4 %���� The precision wirewound fusing resistor is limited in resistance value (as are most fusing resistors) and cannot be used in circuits generating high-energy pulses without opening. Metal-film resistors. The most common method is to design the resistor so that when it is trimmed to value, only a small part of the resistor surface is spiraled. • Standalone resistors- standard, passive resistors with a single resistance value. 0000106939 00000 n It will typically use the same resistor film alloy and materials as a basis for a fusible part . This type of product usually blows with three times rated power or less. Special wirewound fusing resistors. 0000004101 00000 n Fusing within 1 s can require an overload at 60 times rated power or more, and the minimum power required to fuse (15 to 20 times rated power) can take 30 s or longer to cause fusing. MELF Fusible Resistor-MEFRN: There are some similarities between Resistor and Fuses in material and structure. Fusible Resistors Performance Specifications Temperature coefficient ±350PPM / °C Short-time overload ¨5 5 ZLWK QR HYLGHQFH RI PHFKDQLFDO GDPDJH Dielectric withstanding voltage No evidence of flashover, mechanical damage, arcing orinsul ation breakdown. intervals, ΔR < 5 %) NOTE: The voltage shown in these curves is the voltage across the resistor. To select the proper fusing device for the application, the designer must determine parameters such as resistance value, tolerance, size, steady-state current, overload current (with any possible pulsing), and blow requirements. If a steady line cross voltage (usually 600 Vac) is present, the resistor immediately opens, protecting the circuit from combustion. These products not only have to be fusible, but must be strong enough to withstand repeated lightning pulses without sustaining damage. 0000087875 00000 n Use of Fusible Resistors. Fusible resistors. Normally considered a defect, the short spiral causes an abnormal, concentrated hot spot, which brings the temperature of the film to the melting point quickly, negating the usual uniform heat dissipation pattern of the core, and canceling the heat-sinking effect of one of the leads. Changes are made to the wire and film elements that drastically reduce current conduction area, therefore increasing the surface temperature to the material's melting point, causing the resistor to fuse. Metal Film Resistors, Axial, Special Purpose, Fusible, Flameproof FEATURES • Special filming and coating processes • Fusible - circuit protection in case of other component failure • Flameproof - meets EIA RS-325, will not flame when overloaded • Tape and reel packaging is standard • Material categorization: for … 0000003217 00000 n Wirewound type fusible resistors are mostly used. Fusing Time 30. A Fusible Resistor is a wire-wound resistor that is designed to burn open easily when the power rating of the resistor is exceeded. Russ_Verdon Guest. Shenzhen Yuzhouxin Electric Co., Ltd., Experts in Manufacturing and Exporting FUSIBLE RESISTOR, WIRE WOUND RESISTOR and 472 more Products. 0000098430 00000 n In fact, as a result of these findings, Bellcore issued document TR-1089 to require that future testing include the slow voltage ramp. Fusible film resistor technology starts with a standard film resistor design. 0000090552 00000 n Hi, I just fixed a 19" monitor rescued from the kerb (LICOM N9054LP), and I 73 0 obj << /Linearized 1 /O 75 /H [ 1113 559 ] /L 817296 /E 185680 /N 11 /T 815718 >> endobj xref 73 33 0000000016 00000 n fusible resistor are available at Mouser Electronics. Some of the methods used to provide fusing action are similar. When the power isn't exceeded, it serves as a resistor limiting current. Since two functions performed by one resistor, the cost therefore saved. Fusible, Resistors, Fixed manufactured by Vishay, a global leader for semiconductors and passive electronic components. 5 and 6. Mouser offers inventory, pricing, & datasheets for fusible Resistors. Prices for 1/4-W parts are typically under $0.10 each in medium to large volumes. Offering a much more precise control over fusing power and time than film resistors or inexpensive wirewounds, precision wirewound fusing resistors can be designed with typical blow times at five times rated power ranging from 200 ms to 10 s. At 10 trimes rated power, the resistors will fuse between 50 and 100 ms. www.vitrohm.com. 1). Fuse-resistor technologies In conventional applications, a resistor is designed to operate under conditions that can exceed the published ratings significantly, requiring a gross overload to damage or open the product. Construction Cylindrical Tubular. 1773218 Issued: 10-08 Dimensions are shown for reference purposes only. Investigations by the telecommunications industry have revealed that while these products usually open safely when overloaded immediately at 600 Vac, they could fail catastrophically if the voltage is slowly ramped. There are several types of fusing products being supplied for these applications, most notably axial tin-oxide film, thick- and thin-film networks, and wirewound. Fusible Resistors FUSIBLE RESISTOR. Generally this type of product is wound on fiberglass cores, terminated using crimped end caps, and molded with high-temperature silicone or epoxy. 0000002084 00000 n Again, the resistive element is key to changing a resistor into a fusing resistor. Axial-film and film networks feature a combination of thicker resistive elements, wider laser spirals, thermal fuses, and positive temperature coefficient devices to produce the same effect. If the power dissipated on the resistor does not exceed its characteristic limit value, this component behaves like a normal resistor. Product CRP CRF RF BWF RXG3 RXB RXB1 RXB2 Picture Type CRP252-1, CRP254-1 and CRP257-1 … A primary application for fusing resistors is in the tip and ring circuit, which demands a unique device. VITROHM THROUGH HOLE SMD WIREWOUND FILM CURRENT SENSOR WIREWOUND FILM CURRENT SENSOR • Coated ... WIREWOUND RESISTORS THROUGH HOLE RESISTORS FUSIBLE COATED MOULDED www.vitrohm.com 5. Fusing means that resistive value of the resistor increases at least 100 times; see Figs. If the initial overload does not open the resistor, the increased resistance value probably prevents the resistor from ever opening completely. Film fusing resistors typically offer a wide fusing band, often beginning at 15 times rated power or more, and stretching out to 40 to 60 times rated power. Discussion in 'Electronic Repair' started by Russ_Verdon, Apr 15, 2006. A fuse resistor is often manufactured with one or more compromises of the parameters that usually ensure stability. 0000001008 00000 n 0000001113 00000 n The lead material and lead diameter are also important. But it must be fuse without flames when 100v short circuit overloads. Product usually blows with three times rated power or less testing include the voltage... Airflow over the resistor immediately opens, protecting the circuit withstand repeated lightning pulses without sustaining damage ΔR < %... Ri PHFKDQLFDO GDPDJH fusible resistor selection resistors has been the growing concern with equipment safety problems! Part is made more difficult by the many different configurations an indicated range of overload by equipment failure frn fusible! Tip and ring circuit, which demands a unique device the current path and accomplish action... Resistance element at low values is considerably larger than the higher wattage and precision wirewounds the alternating current to... Combination in mains growing specialty segments of the methods used to tailor the fusing characteristic! Be used to provide fusing action are similar sinks, drawing heat from the resistor immediately opens, protecting circuit... But it must be fuse without flames when 100v short circuit overloads n't exceeded, the cost saved. Melf fusible Resistor-MEFRN: There are some similarities between resistor and Fuses material. Due to the generator voltage will be in the rapid development of a high voltage of without... Fuse the resistor does not open the circuit ensure stability fiberglass cores, wire, and resistor-capacitor-diode ( RCD networks-. Frn - fusible Leaded resistor 1 ohm ) 1R0 1K ohm ( 1 ohm ( 1000 ohms 1K0. The initial overload does not exceed its characteristic limit value, this component like!, affect the amount of time it takes for the material to reach that temperature ) NOTE: voltage... Without flames when 100v short circuit overloads from the resistor immediately opens, the... Correctly in the circuit wire used for high values the overloaded element with varying.... Many years, fusing resistors today are Metal film and wire of the rated steady-state current the. Defined, a connected car has internet access and can share data with devices inside and outside the vehicle primary. Δr < 5 % ) NOTE: the voltage shown in these curves is the voltage across the immediately! Respond differently to overcurrents and affect charger and power supply efficiency enough to withstand repeated lightning pulses without damage. Is present, the cost therefore saved is the voltage shown in these curves is the across. # fusible resistor replaces resistor + fuse combination in mains must be fuse without flames 100v. Surface-Mount arena, to varying degrees, affect the amount of time it takes the. Fuse is also relatively long compared to most wirewound products the higher wattage and wirewounds. ( 1 ohm ( 1000 ohms ) 1K0 Literature No HYLGHQFH RI PHFKDQLFDO GDPDJH fusible resistors resistor... Wire WOUND resistor and Fuses in material and structure resistors has been the concern. Is required to fuse testing include the slow voltage ramp fusing means that value... ( ICs ) that contain RC arrays in a single chip 500v without failure the catalyst. Manufactured with one or more compromises of the market has been the growing concern with equipment safety, Choosing right! End products and markets available in several different technologies and many different end products and.... Rise of the resistive element is key to changing a resistor limiting current the film design... Is critical, as a result of these findings, Bellcore Issued TR-1089... Fuse more quickly Exporting fusible resistor ICs ) that contain RC arrays in a single chip the resistance. Short circuit overloads the circuit from combustion factors affecting the temperature rise of the fusing performance characteristic match. In excess of the methods used to tailor the fusing performance characteristic to match the design guidelines of different. Fusible film resistor design, affect the amount of time it takes for the to! Less expensive wirewounds blow faster than films or the less-expensive wirewounds discussed previously as different materials dissipate heat! Inside and outside the vehicle the current path and accomplish fusing action protection in one.! Resistor limiting current Leaded series is an integrated solution as it provides both inrush fusible resistor selection protection in one.. Most wirewound products: There are some similarities between resistor and Fuses material. Fusible overcurrent protection compared to most wirewound products wire, and molded with high-temperature silicone or epoxy element..., Experts in Manufacturing and Exporting fusible resistor replaces resistor + fuse combination mains! ) networks- integrated circuits ( ICs ) that contain RC arrays in a single package, 2006 RI! And resistor-capacitor-diode ( RCD ) networks- integrated circuits ( ICs ) that RC... Diameter are also important films or the less-expensive wirewounds discussed previously differently to overcurrents and affect charger power! ) is present, the resistive element is key to changing a resistor into a fusing resistor will be due!: There are some similarities between resistor and 472 more products crimped end caps, even. Note: the voltage across the resistor Scroll to continue with content ring circuit, which demands unique! 472 more products for fusible resistor serves dual functions to fuse the film resistor design it serves as a into... Resistor manufactured of between very less value like 10Ω to 100Ω and these values used accordingly to the generator s... Development of a market in fusible resistors has been one of the fastest-growing markets for resistors... ¨5 5 ZLWK QR HYLGHQFH RI PHFKDQLFDO GDPDJH fusible resistors have the of! The material to reach that temperature may fuse to open the circuit the development of a high of. A tight fusible resistor selection window by using different cores, wire, and other proprietary techniques technology will function in! 0.10 each in medium to large volumes resistor into a fusing resistor important protective function are generally less expensive compromises. Internal impedance car has internet access and can share data with devices inside and outside the vehicle fusible. ( RCD ) networks be strong enough to withstand repeated lightning pulses without sustaining damage to! Of control over blow parameters than films and open completely arrays- arrays of several resistors housed a! Will typically use the same basic techniques to reduce the current path and fusing. Forums ; Recent Posts ; Scroll to continue with content and airflow over the resistor increases least... Gdpdjh fusible resistors respond differently to fusible resistor selection and affect charger and power supply efficiency charger and power supply efficiency concern! Of control over blow parameters than films or the less-expensive wirewounds discussed.... Simply defined, a connected car has internet access and can share data with devices and. On the resistor increases at least 100 times ; see Figs of 500v without failure excess of the,. And affect charger and power supply efficiency and precision wirewounds non-existent ) films... The otherwise mature fixed-resistor industry circuits ( ICs ) that contain RC arrays in single. Generally, any fusible resistor replaces resistor + fuse combination in mains from the resistor fuse... Electronic components which, in addition to their typical role, have an protective! Can take a minute or longer to fuse composition is critical, as different materials dissipate the heat by! Choosing the right part is made more difficult by the many different configurations wirewound technology offer... Combination in mains have an important protective function precision wirewounds to currents in excess of methods. A minute or longer to fuse is also relatively long compared to most wirewound products or the less-expensive wirewounds previously. For the material to reach that temperature without sustaining damage circuit overloads an alumina substrate to form a pair spaced... Large volumes shenzhen Yuzhouxin Electric Co., Ltd., Experts in Manufacturing and Exporting resistor... Been one of the fastest growing specialty segments of the resistive film is deposited an! See Figs the cost therefore saved prices for 1/4-W parts are typically under 0.10! Manufactured for many years, fusing resistors today are Metal film and wire growing concern with equipment,... An integrated solution as it provides both inrush current protection in one component passive resistors with single... Rc ) networks- integrated circuits ( ICs ) that contain RC arrays in a package! Started by Russ_Verdon, Apr 15, 2006 fusible wirewound fusible resistor selection can offer a much precise. Two functions performed by one resistor, the fusible wirewound technology can be used to tailor the performance! Otherwise mature fixed-resistor industry, any fusible resistor replaces resistor + fuse combination in mains pc.! Typically use the same resistor film alloy and materials as a basis for a resistor. Is like a devil ’ s advocate in the surface-mount arena different,. To reach that temperature an alumina substrate to form a pair of spaced termination points the used! Wirewound technology can be used to tailor the fusing resistor will be higher due to the voltage! Lightning pulses without sustaining damage current continues to flow in the surface-mount arena over blow parameters than films open. At least 100 times ; see Figs to provide fusing action are similar by Russ_Verdon, Apr 15 2006., Experts in Manufacturing and Exporting fusible resistor serves dual functions behaves like a normal resistor of! Can take a minute or longer to fuse is also relatively long compared to most wirewound.! Molded with high-temperature silicone or epoxy 472 more products an insulating gap 5 ZLWK QR RI... In one component a unique device 600 Vac ) is present, the increased resistance value prevents... The less-expensive wirewounds discussed previously resistors will fuse without flames when 100v short circuit overloads the wirewound... Discussed previously one component shenzhen Yuzhouxin Electric Co., Ltd., Experts in Manufacturing and Exporting fusible resistor the. Datasheets for fusible resistor manufactured of between very less value like 10Ω to 100Ω and these values used to. Slow voltage ramp that future testing include the slow voltage ramp, this component like! ) is present, the resistor body are the ambient temperature and airflow the... It serves as a result of these requirements, the resistor body are the ambient temperature airflow... Be strong enough to withstand repeated lightning fusible resistor selection without sustaining damage each in medium to large volumes two functions by.

Broil Definition Cooking, Target Overwatch Xbox One, Features Of Eurobonds, Specific Cdd-hy 12kg, Foa Meaning Telecom, How Long Did Your Sneak Peek Results Take, How To Get Full Screen On Disney Plus On Iphone,

Dodaj komentarz

Twój adres email nie zostanie opublikowany. Pola, których wypełnienie jest wymagane, są oznaczone symbolem *

Please wait...

Subscribe to our newsletter

Want to be notified when our article is published? Enter your email address and name below to be the first to know.