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 … Film fusing resistors are generally less precise than wirewounds in defining what overload is required to fuse the resistor within a specific time span. 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 Axial leads operate as heat sinks, drawing heat from the resistor body and shunting it into the pc board. Its benefits are the ability to hit a tight blow window by using different cores, wire, and other proprietary techniques. fusible Resistors are available at Mouser Electronics. Selecting fusing resistors for equipment safety, Choosing the right part is made more difficult by the many different technologies and configurations available. Some of the methods used to provide fusing action are similar. 0000098430 00000 n 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�. Fusible resistor selection Reply to Thread. This axial leaded series is an integrated solution as it provides both inrush current protection and fusible overcurrent protection. 0000007027 00000 n Hi, I just fixed a 19" monitor rescued from the kerb (LICOM N9054LP), and I Fusible, Resistors, Fixed manufactured by Vishay, a global leader for semiconductors and passive electronic components. The generator voltage will be higher due to the generator’s internal impedance. RESISTOR PRODUCT SELECTION GUIDE A YAGEO Company. Although metal-film fusing resistors are much less precise than most wirewounds, they are generally less expensive. 0000106939 00000 n 1). Of these characteristics, the type of material used as the resistance element controls the most important parameter: the melting temperature of the material. • Resistor-capacitor-diode (RCD) networks- ICs that … 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. Each parameter will help define which technology will function correctly in the circuit. 5 and 6. FUSING CHARACTERISTIC The resistors will fuse without the risk of fire and within an indicated range of overload. 2 Watt Fusible Resistors from NTEPartsDirect.com. 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. A Fusible Resistor is a wire-wound resistor that is designed to burn open easily when the power rating of the resistor is exceeded. A Verified CN Gold Supplier on Alibaba.com. Mouser offers inventory, pricing, & datasheets for fusible resistor. Wirewound technology also offers a greater selection of products, ranging from inexpensive resistors that operate and cost in the same range as films, to precision fast-acting fuse resistors. 0000007830 00000 n A primary application for fusing resistors is in the tip and ring circuit, which demands a unique device. 1. Film fusing resistors (rated at up to 2 W) and inexpensive wirewounds can take a minute or longer to fuse. A fusible resistor can pass the pulse of a high voltage of 500v without failure. Fusible Resistor contain both functions, as being Resistor in normal condition and changed into fuse while abnormal Current comes in to protect machine and equipment. Fusing Time 30. As long as the resistor is not subjected to currents in excess of the rated steady-state current, the product operates as a resistor. Items per page Manufacturer STACKPOLE YAGEO. The fusing characteristic is measured under constant voltage. Terminal strength No evidence of mechanical damage. Configuration types include single resistors, resistor chip arrays, resistor-capacitor (RC) networks, and resistor-capacitor-diode (RCD) networks. 147 Products. Metal-film resistors. 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. The time to fuse is also relatively long compared to most wirewound products. Other factors, to varying degrees, affect the amount of time it takes for the material to reach that temperature. 1773218 Issued: 10-08 Dimensions are shown for reference purposes only. Passives > Resistors > Fusible Resistors. Film resistors usually employ the same basic techniques to reduce the current path and accomplish fusing action. Fusible Resistor-FRN: There are some similarities between Resistor and Fuses in material and structure. 0000087875 00000 n 0000002864 00000 n Typical blow times with five times rated power range from 50 ms to 10 s, and with 10 times rated power from 10 to 200 ms. Generally, this type of product costs several dollars each or more, depending on the degree of manufacturing difficulty and testing required. The official e-commerce Division of NTE Electronics, Inc. FOR QUESTIONS AND ASSISTANCE: This fusible resistor used in the circuit operates high voltage with small or lower current such as 100ma, 250ma. The development of a market in fusible resistors has been one of the fastest growing specialty segments of the otherwise mature fixed-resistor industry. These products not only have to be fusible, but must be strong enough to withstand repeated lightning pulses without sustaining damage. •Resistor-capacitor (RC) networks- integrated circuits (ICs) that contain RC arrays in a single chip. Dimensions are in millimetres unless otherwise specified. Core composition is critical, as different materials dissipate the heat created by the overloaded element with varying efficiency. Fusing resistors are available in several different technologies and many different configurations. 0000004959 00000 n FRN - Fusible Leaded Resistor 1 ohm (1 ohm) 1R0 1K ohm (1000 ohms) 1K0 Literature No. Prices for 1/4-W parts are typically under $0.10 each in medium to large volumes. 0000002084 00000 n 0000098636 00000 n 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. 0000001826 00000 n 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. Generally this type of product is wound on fiberglass cores, terminated using crimped end caps, and molded with high-temperature silicone or epoxy. Resistors can be classified based on their configuration. • Standalone resistors- standard, passive resistors with a single resistance value. Resistance to Soldering heat ¨5 5 ZLWK QR HYLGHQFH RI PHFKDQLFDO GDPDJH 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. 0000003873 00000 n One of the fastest-growing markets for fusing resistors is in telecommunications. Showing 101 - 147. 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. 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. 0000087554 00000 n 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. 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. Mouser offers inventory, pricing, & datasheets for fusible resistor. This is because the wirewound resistance element at low values is considerably larger than the wire used for high values. 0000090552 00000 n 0000119185 00000 n fusible resistor are available at Mouser Electronics. Wirewound type fusible resistors are mostly used. Shenzhen Yuzhouxin Electric Co., Ltd., Experts in Manufacturing and Exporting FUSIBLE RESISTOR, WIRE WOUND RESISTOR and 472 more Products. Fusing characteristics can vary dramatically from one technology to another, and even from product to product within a technology. Use of Fusible Resistors. %PDF-1.4 %���� For all of these requirements, the fusible wirewound resistor is a better choice. tycoelectronics.com passives.tycoelectronics.com Flame-Proof Fusible Resistors Type FRN Series Fuse resistors are electronic components which, in addition to their typical role, have an important protective function. 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. 0000002711 00000 n Fusible resistors. I contacted a manufacturer of fusible resistors in China called Token Electronics (www.tokenchina.com). Wirewound technology can offer a much more precise degree of control over blow parameters than films or the less-expensive wirewounds discussed previously. Mouser offers inventory, pricing, & datasheets for fusible resistor Metal Film Resistors - Through Hole. In this way, a fusible resistor serves dual functions. 0000004685 00000 n FUSIBLE RESISTOR - Futaba Electric Co., Ltd. FUSIBLE RESISTOR (Standard Type) FUSIBLE RESISTOR (Small Type) 0000004101 00000 n Mouser offers inventory, pricing, & datasheets for fusible Resistors. Since two functions performed by one resistor, the cost therefore saved. fusible resistor are available at Mouser Electronics. Wirewound resistors. However, fusible resistors respond differently to overcurrents and affect charger and power supply efficiency. # UL recognised. Variable Resistor: A variable resistor has 3 components, 2 of which are fixed, and the 3rd is a slider which is meant for adjusting. Again, the resistive element is key to changing a resistor into a fusing resistor. 0000007242 00000 n Fig. Back Filter Options. intervals, ΔR < 5 %) NOTE: The voltage shown in these curves is the voltage across the resistor. (line) input applications. MELF Fusible Resistor-MEFRN: There are some similarities between Resistor and Fuses in material and structure. Apr 15, 2006 #1. 0000003217 00000 n 0000038135 00000 n Russ_Verdon Guest. It will typically use the same resistor film alloy and materials as a basis for a fusible part . This difference is much less pronounced (or non-existent) in films. A cermet resistive film is deposited on an alumina substrate to form a fixed resistance between a pair of spaced termination points. 2. 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. Other obvious factors affecting the temperature rise of the resistor body are the ambient temperature and airflow over the resistor element. The lead material and lead diameter are also important. 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. trailer << /Size 106 /Info 71 0 R /Root 74 0 R /Prev 815708 /ID[<7b6248488f8ab94065575731d50392dd>] >> startxref 0 %%EOF 74 0 obj << /Type /Catalog /Pages 59 0 R /Metadata 72 0 R /JT 70 0 R /PageLabels 57 0 R >> endobj 104 0 obj << /S 445 /L 567 /Filter /FlateDecode /Length 105 0 R >> stream • Resistor chip arrays- arrays of several resistors housed in a single package. Fig. 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. 0000112435 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. 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. 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. Discussion in 'Electronic Repair' started by Russ_Verdon, Apr 15, 2006. 0000090691 00000 n If the power dissipated on the resistor does not exceed its characteristic limit value, this component behaves like a normal resistor. Simply defined, a connected car has internet access and can share data with devices inside and outside the vehicle. Fuse & Fusible Resistor from Changzhou Southern Electronic Element Factory Co., Ltd.. Search High Quality Fuse & Fusible Resistor Manufacturing and Exporting supplier on Alibaba.com. 0000001008 00000 n Specifications subject to change. Search Forums; Recent Posts; Scroll to continue with content. 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. 0000004920 00000 n Although a variable resistor isn’t common in electrical … 0000067626 00000 n 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. 0000007429 00000 n 0000001113 00000 n A portion of the resistive film is removed to form a pair of resistor sections separated by an insulating gap. Once the steady-state current is exceeded, the resistor may fuse to open the circuit. Additional Feature FLAME PROOF PRECISION. As a result, most of the electronic equipment manufactured today has been designed with the ability to deenergize before a fire or other calamity can occur. Generally, any fusible resistor manufactured of between very less value like 10Ω to 100Ω and these values used accordingly to the required circuit. Selecting fusing resistors for equipment safety Choosing the right part is made more difficult by the many different technologies and configurations available BY JIM McGONNELL IRC, Inc., Boone, NC The development of a market in fusible resistors has been one of the fastest growing specialty segments of the otherwise mature fixed-resistor industry. 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. When the power isn't exceeded, it serves as a resistor limiting current. If a steady line cross voltage (usually 600 Vac) is present, the resistor immediately opens, protecting the circuit from combustion. In fact, as a result of these findings, Bellcore issued document TR-1089 to require that future testing include the slow voltage ramp. 0000001650 00000 n Since two functions performed by one resistor, the cost therefore saved. Although having been manufactured for many years, fusing resistors have shown limited growth until the last 10 to 15 years. A fuse resistor is often manufactured with one or more compromises of the parameters that usually ensure stability. This consideration is important because current continues to flow in the circuit. But it must be fuse without flames when 100v short circuit overloads. Fusible Resistors FUSIBLE RESISTOR. # Fusible resistor replaces resistor + fuse combination in mains. 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. 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. 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. Mouser offers inventory, pricing, & datasheets for fusible resistor. 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. 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To 15 years 2 W ) and inexpensive wirewounds can take a minute or longer to fuse is also long... Affect the amount of time it takes for the material to reach that fusible resistor selection ; see Figs sustaining.... Resistor serves dual functions wire used for high values fuse more quickly the growing concern with equipment safety Choosing... That contain RC arrays fusible resistor selection a single resistance value probably prevents the increases... Inexpensive wirewounds can take a minute or longer to fuse the resistor, WOUND... Curves is the voltage across the resistor may fuse to open the circuit from combustion key! Wirewounds blow faster than films or the less-expensive wirewounds discussed previously airflow over the resistor within a specific span! Development of a high voltage of 500v without failure and precision wirewounds 1R0 1K ohm 1. Takes for the material to reach that temperature to flow in the circuit resistance.! Technology will function correctly in the tip and ring circuit, which demands a unique device defined a! ; Scroll to continue with content a basis for a fusible resistor selection to! Rapid development of the fusing performance characteristic to match the design guidelines of many different end products and.... Resistors usually employ the same resistor film alloy and materials as a basis for a fusible resistor different! The slider is like a devil ’ s internal impedance lead fusible resistor selection and.! 1K0 Literature No by an insulating gap the circuit from combustion wirewound is., any fusible resistor selection Reply to Thread 1000 ohms ) 1K0 Literature No 5 ZLWK QR RI! Current protection in one component, Apr 15, 2006 ( ICs ) contain! Fuse is also relatively long compared to most wirewound products than most,... Share data with devices inside and outside the vehicle voltage across the resistor within specific! Resistor 1 ohm ( 1000 ohms ) 1K0 Literature No wire, and other techniques! Steady line cross voltage ( usually 600 Vac ) is present, the resistor does not exceed characteristic!