Features Applications Fuses at 120 V or 240 V White goods E24 resistance values Inverters RoHS compliant* Lighting UL 1412 recognized Metering Coating material meets UL 94V-0 requirements 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. Electrical Characteristics Agency Recognition Description Characteristic FW Series Power 1, 2, 3, 5, 7** W UL 1412 File Number: E349323 Resistance Range 4.7 ohms to 100 ohms (E24 values) UL 1412 Recognized Resistance Range 4.7 ohms to 47 ohms Materials Tolerance 5 % Resistor ............... Wire wound around a Temperature Coefficient 200 PPM/C ceramic core Operating Temperature Range -55 C to +155 C Lead Wire ........................Tinned copper Maximum Voltage P*R Housing .......................... Insulated resin Fusing Point See Fusing Performance Chart Coating Material ...........Meets UL 94V-0 Fusing Time See Fusing Performance Chart requirements The resistor will fuse safely if 120 or 240 V is applied. The time to fuse depends on the resistance value. How to Order ** 7 W = 240 Vac only. FW 10 A 7R50 J A Model Product Dimensions FW = Fusible Wirewound H L H Rated Power 10 = 1.0 Watts D 20 = 2.0 Watts 30 = 3.0 Watts 50 = 5.0 Watts 70 = 7.0 Watts MM d DIMENSIONS: Pin Style (INCHES) (DIA.) A = Axial Resistance Code Dimensions R<100 ohms: Model D L R represents decimal point Hd (Max.) (Max.) (examples: 7R50 = 7.5 ohms) R 100 ohms: 5.0 12 28 3.0 0.55 0.05 First three digitsare significant, FW10A (1 W) (.197) (.472) (1.102 .118) (.022 .002) fourth digit represents number of zeros to follow 6.0 12 28 3.0 0.65 0.05 FW20A (2 W) (example: 1000 = 100 ohms) (.236) (.472) (1.102 .118) (.026 .002) Resistance Tolerance 6.5 16 28 3.0 0.75 0.05 J = 5 % FW30A (3 W) (.256) (.630) (1.102 .118) (.030 .002) Packaging 7.5 18 28 3.0 0.75 0.05 A = Ammo Pack FW50A (5 W) (.295) (.709) (1.102 .118) (.030 .002) 1,000 pcs./box: FW10, FW20, FW30 500 pcs./box: FW50, FW70 9.5 26 38 3.0 0.75 0.05 FW70A (7 W) (.374) (1.024) (1.496 .118) (.030 .002) Popular Values Resistance Resistance Resistance Resistance Value Value Code Code (Ohms) (Ohms) WARNING Cancer and Reproductive Harm 4.7 4R70 7.5 7R50 www.P65Warnings.ca.gov 5.1 5R10 8.2 8R20 *RoHS Directive 2015/863, Mar 31, 2015 and Annex. 5.6 5R60 9.1 9R10 Specications are subject to change without notice. Users should verify actual device performance in their specic 6.2 6R20 10.0 10R0 applications. The products described herein and this document are subject to specic legal disclaimers as set forth 6.8 6R80 on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf *RoHS COMPLIANTFWxxA Series Fusible Power Resistors Performance Specifications Test Method Characteristic Limits (JIS-C-5201 & JIS-C-5202) 4.8 Natural resistance changes per temperature (C): R2-R2 6 x 10 (PPM/C) Temperature Coefficient 200 PPM/C max. R1(T2-T1) R1: Resistance value at room temp. (T1) R2: Resistance value at room temp. +100 C (T2) Resistance change rate is 5 % max., with 4.13 Permanent resistance change after the application of a Short Time Overload no evidence of mechanical damage. 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 Strength No evidence of mechanical damage. 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 Resistance change rate is 1 % max., with Resistance to Soldering Heat to a point 2.0 to 2.5 mm from the body in 260 C (5 C) no evidence of mechanical damage. solder for 10 (1) seconds. 4.17 The area covered with a new, smooth, clean, shiny and continuous surface free from concentrated pinholes. Solderability 95 % coverage minimum 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, Resistance change rate is 5 % max., with Load Life in Humidity 0.5 hours OFF) at RCWV in a humidity test chamber no evidence of mechanical damage. controlled at 40 C (2 C) and 90-95 % relative humidity. 1 W ~ 5 W: Load 120/240 V AC voltage. Resistance value shall increase at least Safety Fuse 7 W: Load 240 VAC voltage. 100 times initial value. Resistor must be safely fused. UL1412, 19.1 A resistor (or a resistor and its mounting if provided), Dielectric Withstanding No evidence of flashover mechanical shall withstand, without breakdown, for a period of not Voltage damage, arcing or insulation breakdown. 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 Color 1st Band 2nd Band 3rd band Multiplier Tolerance Black 0 0 0 1 Brown 1 1 1 10 1 % Red 2 2 2 100 2 % Orange 3 3 3 1 K 1st Significant Figure Yellow 4 4 4 10 K Green 5 5 5 100 K 0.5 % 2nd Significant Figure Blue 6 6 6 1 M 0.25 % 3rd Significant Figure Violet 7 7 7 10 M 0.10 % Grey 8 8 8 0.05 % Multiplier White 9 9 9 Tolerance Gold 0.1 5 % Silver 0.01 10 % Specications are subject to change without notice. Users should verify actual device performance in their specic applications. The products described herein and this document are subject to specic disclaimers as set forth on the last page of this document, and at www.bourns.com/legal/disclaimer.pdf.