WRF3JBR240

WRF Series Stackpole Electronics, Inc. Conformal Coated Wirewound Resistor Features: • • • • Resistive Product Solutions Conformal coating Flameproof construction Cut and formed product is available on select sizes Contact factory for details RoHS compliant / lead-free Electrical Specifications Dielectric Withstanding Voltage (RMS) 700V Resistance Temperature Coefficient Ohmic Range (Ω ) and Tolerance 5% WRF1 1W Maximum Working Voltage √PR -80ppm/ºC ~ +900ppm/ºC 0.1 - 33 WRF2 2W √PR 700V -80ppm/ºC ~ +900ppm/ºC 0.1 - 220 WRF3 3W √PR 700V -80ppm/ºC ~ +900ppm/ºC 0.1 - 220 Type / Code Power Rating (Watts) @ 25ºC Mechanical Specifications Type / Code WRF1 WRF2 WRF3 A B C D Body Length Body Width Lead Length (Bulk)(1) Lead Diameter 0.433 11.00 0.630 16.00 0.630 16.00 max max max max max max 0.197 5.00 0.197 5.00 0.197 5.00 max max max max max max 1.102 28.00 1.102 28.00 1.102 28.00 ± ± ± ± ± ± 0.118 3.00 0.118 3.00 0.118 3.00 0.031 0.78 0.031 0.78 0.031 0.78 ± ± ± ± ± ± 0.002 0.05 0.002 0.05 0.002 0.05 Unit inches mm inches mm inches mm (1) See "Resistor Packaging Specification Document" for lead length dimension for tape and reel packaged product. Performance Characteristics Test Rated Ambient Temperature Overload 15 Times the Rated Wattage Short Time Overload Effective Soldering Insulation Resistance Dielectric Withstanding Volt Load Life @ 70ºC - 1,000 hrs. Moisture Resistance Shock and Vibration Solderability Temperature Coefficient Operating Temperature Range: -55ºC to +200ºC (WRF 1, 2) -55ºC to +225ºC (WRF 3) Rev Date: 07/27/2012 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. Test Results 85ºC Open circuit within 2 minutes ± 3% + 0.05Ω ± 2% + 0.05Ω 4 >10 MΩ ± 2% + 0.05Ω ± 5% + 0.05Ω ± 5% + 0.05Ω ± 1% + 0.05Ω 90% tin covered min. -80ppm/ºC ~ +900ppm/ºC 1 www.seielect.com marketing@seielect.com WRF Series Stackpole Electronics, Inc. Conformal Coated Wirewound Resistor Resistive Product Solutions Power Derating Curve: Percent Rated Power (%) 100 75 WRF3 50 WRF1, WRF2 25 50 0 85 100 150 200 250 225 300 Ambient Temperature (ºC) How to Order 1 2 3 4 5 6 7 8 9 10 W R F 2 J B 1 0 R 0 Product Series Conformal WRF Coated WW Size Power Rating 1W 1 2W 2 3W 3 Tolerance Code Tol Value 5% J E24 Code T A B Packaging Description Size All Sizes Tape and Reel Ammo All Sizes Bulk Resistance Value Quantity 2,000 1,000 Four characters with the multiplier used as the decimal holder. 0.1 ohm = R100 1 ohm = 1R00 100 ohm = 100R Legacy Part Number (before January 3, 2011): Type WRF SEI Type Code Nominal Resistance Tolerance Packaging WRF 2 10R 5% A Description Conformal Coated WW Code 1 2 3 Rev Date: 07/27/2012 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. Tol Values 5% E24 2 Type All All All Pkg Qty 1,000 2,000 1,000 Description Bulk Tape and Reel Ammo Code A R T www.seielect.com marketing@seielect.com