T PL IA N M CO *R oH S Features Applications ■ Fuses at 120 V or 240 V ■ White goods ■ E24 resistance values ■ Inverters ■ RoHS compliant* ■ Lighting ■ ■ Metering UL Listed FWxxA Series Fusible Power Resistors General Introduction The FWxxA Series of axial leaded wirewound resistors is designed to fuse under abnormal conditions such as sudden surges in voltage or circuit malfunctions. The resistor will fuse upon application of 120 or 240 voltages. Agency Listing Electrical Characteristics Characteristic Power Resistance Range UL Listed Resistance Range Tolerance Temperature Coefficient Operating Temperature Range Maximum Voltage Fusing Point Fusing Time FW Series 1, 2, 3, 5, 7** W 4.7 ohms to 100 ohms (E24 values) 4.7 ohms to 47 ohms 5% ±200 PPM/°C -55 °C to +155 °C √P*R See Fusing Performance Chart See Fusing Performance Chart The resistor will fuse safely if 120 or 240 V is applied. The time to fuse depends on the resistance value. ** 7 W = 240 Vac only. Product Dimensions H L H D DIMENSIONS: MM (INCHES) d (DIA.) Dimensions Model D (Max.) L (Max.) H d FW10A (1 W) 5.5 (.217) 12 (.472) 28 ± 3.0 (1.102 ± .118) 0.55 ± 0.05 (.022 ± .002) FW20A (2 W) 6.0 (.236) 12 (.472) 28 ± 3.0 (1.102 ± .118) 0.65 ± 0.05 (.026 ± .002) FW30A (3 W) 6.5 (.256) 16 (.630) 28 ± 3.0 (1.102 ± .118) 0.75 ± 0.05 (.030 ± .002) FW50A (5 W) 7.5 (.295) 18 (.709) 28 ± 3.0 (1.102 ± .118) 0.75 ± 0.05 (.030 ± .002) FW70A (7 W) 9.5 (.374) 26 (1.024) 38 ± 3.0 (1.496 ± .118) 0.75 ± 0.05 (.030 ± .002) *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. Description UL File Number: E349323 Materials Resistor ............... Wire wound around a ceramic core Lead Wire ........................Tinned copper Housing .......................... Insulated resin How to Order FW 10 A 7R50 J A Model FW = Fusible Wirewound Rated Power 10 = 1.0 Watts 20 = 2.0 Watts 30 = 3.0 Watts 50 = 5.0 Watts 70 = 7.0 Watts Pin Style A = Axial Resistance Code • R<100 ohms: “R” represents decimal point (examples: 7R50 = 7.5 ohms) • R≥100 ohms: First three digits are significant, fourth digit represents number of zeros to follow (example: 1000 = 100 ohms) Resistance Tolerance J = ±5 % Packaging A = Ammo Pack • 1,000 pcs./box: FW10, FW20, FW30 • 500 pcs./box: FW50, FW70 Popular Values Resistance Value (Ohms) 4.7 5.1 5.6 6.2 6.8 7.5 8.2 9.1 10 Resistance Code 4R70 5R10 5R60 6R20 6R80 7R50 8R20 9R10 10R0 FWxxA Series Fusible Power Resistors Performance Specifications Characteristic Limits Temperature Coefficient ±200 PPM/°C max. Test Method (JIS-C-5201 & JIS-C-5202) 4.8 Natural resistance changes per temperature (°C): R2-R2 x 106 (PPM/°C) R1(T2-T1) Short Time Overload Resistance change rate is ±5 % max., with no evidence of mechanical damage. Terminal Strength No evidence of mechanical damage. Resistance to Soldering Heat Resistance change rate is ±1 % max., with no evidence of mechanical damage. Solderability 95 % coverage minimum Load Life in Humidity Resistance change rate is ±5 % max., with no evidence of mechanical damage. Safety Fuse Resistance value shall increase at least 100 times initial value. Dielectric Withstanding Voltage No evidence of flashover mechanical damage, arcing or insulation breakdown. R1: Resistance value at room temp. (T1) R2: Resistance value at room temp. +100 °C (T2) 4.13 Permanent resistance change after the application of a potential of 2.5 times RCWV for 5 seconds. 4.16 Direct Load: Resistance to a 2.5 kg direct load for 10 seconds in the direction of the longitudinal axis of the terminal leads. Twist Test: Terminal leads shall be bent through 90 ° at a point of approximately 6 mm from the body of the resistor and shall be rotated through 360 ° (about the original axis of the bent terminal) in alternating directions for a total of three rotations. 4.18 Permanent resistance change when leads are immersed to a point 2.0 to 2.5 mm from the body in 260 °C (±5 °C) solder for 10 (±1) seconds. 4.17 The area covered with a new, smooth, clean, shiny and continuous surface free from concentrated pinholes. Test temp. of solder: 245 °C (±3 °C). Dwell time in solder: 2~3 seconds. 7.9 Resistance change after 1,000 hours (1.5 hours “ON”, 0.5 hours “OFF”) at RCWV in a humidity test chamber controlled at 40 °C (±2 °C) and 90-95 % relative humidity. 1 W ~ 5 W: Load 120/240 VAC voltage. 7 W: Load 240 VAC voltage. Resistor must be safely fused. UL1412, 19.1 A resistor (or a resistor and its mounting if provided), shall withstand, without breakdown, for a period of not less than one minute, a 60 Hz potential of 1000 V plus twice the rated voltage applied between live parts and dead metal parts, if any. Typical Part Marking 1st Significant Figure 2nd Significant Figure 3rd Significant Figure Multiplier Tolerance Color Black Brown Red Orange Yellow Green Blue Violet Grey White Gold Silver 1st Band 0 1 2 3 4 5 6 7 8 9 2nd Band 0 1 2 3 4 5 6 7 8 9 3rd band 0 1 2 3 4 5 6 7 8 9 Multiplier 1Ω 10 Ω 100 Ω 1 KΩ 10 KΩ 100 KΩ 1 MΩ 10 MΩ Tolerance 0.1 Ω 0.01 Ω ±5 % ±10 % ±1 % ±2 % ±0.5 % ±0.25 % ±0.10 % ±0.05 % Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. FWxxA Series Fusible Power Resistors Pulse Performance 6 7W Peak Voltage (KV) 5 4 3 5W 3W 2 2W 1 1W 0 4.7 5.6 6.8 8.2 10 12 15 20 18 22 27 33 39 47 68 100 120 Value (Ohms) 1.2/50 µs Peak Voltage Limit (10 pulses at 10 sec. intervals, ΔR < 5 %) NOTE: The voltage shown in these curves is the voltage across the resistor. The generator voltage will be higher due to the generator’s internal impedance. Fusing Performance Maximum Fusing Time (S) 70 60 50 40 30 7W 20 1W 2W 3W 5W 10 0 20 40 60 80 100 120 140 160 180 200 220 240 Initial Power (W) Temperature Rise Power Derating Curve 100 20 20 40 60 Rated Load (%) 80 100 Percent Rated Load (%) Heat Rise (°C) 7W 5W 3W 2W 1W 200 0 +70 °C 100 300 +155 °C +275 °C 80 60 40 20 0 -55 0 50 100 150 200 Ambient Temperature (°C) Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. 250 300 FWxxA Series Fusible Power Resistors Packaging Specifications O C T 6±1 P B Z = 1.0 DIMENSIONS: MM (INCHES) t S L1 L2 Model O P A B C Qty./Box FW10A (1 W) 58 ± 1 (2.283 ± .039) 5 ± 0.3 (.197 ± .112) 75 ± 5 (2.953 ± .197) 70 ± 5 (2.756 ± .197) 255 ± 5 (10.039 ± .197) 1,000 pcs. FW20A (2 W) 58 ± 1 (2.283 ± .039) 5 ± 0.3 (.197 ± .112) 80 ± 5 (3.150 ± .197) 82 ± 5 (3.228 ± .197) 255 ± 5 (10.039 ± .197) 1,000 pcs. FW30A (3 W) 65 ± 1 (2.559 ± .039) 10 ± 0.3 (.393 ± .112) 90 ± 5 (3.543 ± .197) 119 ± 5 (4.685 ± .197) 255 ± 5 (10.039 ± .197) 1,000 pcs. FW50A (5 W) 65 ± 1 (2.559 ± .039) 10 ± 0.3 (.393 ± .112) 90 ± 5 (3.543 ± .197) 88 ± 5 (3.465 ± .197) 255 ± 5 (10.039 ± .197) 500 pcs. FW70A (7 W) 65 ± 1 (2.559 ± .039) 10 ± 0.3 (.393 ± .112) 90 ± 5 (3.543 ± .197) 88 ± 5 (3.465 ± .197) 255 ± 5 (10.039 ± .197) 500 pcs. 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