WRC Series Stackpole Electronics, Inc. Conformal Coated Welded Wirewound Resistor Resistive Product Solutions Conformal coating Features: Flameproof construction Cut and formed product is available on select sizes Contact factory for details RoHS compliant / lead-free Bulk packaging available contact Stackpole for package quantities Bulk packaging available contact Stackpole for package quantities Electrical Specifications Ohmic Range () Maximum Dielectric Power Rating Resistance Temperature and Tolerance Type / Code Size Working Withstanding (Watts) 25C Coefficient Voltage Voltage (RMS) 5% WRC1S 0309 1W PR 700V -80 ppm/C ~ +900 ppm/C 0.1 - 100 WRC1 0410 1W WRC2A 0416 2W WRC3A 0416 3W PR 700V -80 ppm/C ~ +900 ppm/C 0.1 - 470 WRC4A 0416 4W WRC5A 0416 5W WRC3B 0617 3W PR 700V -80 ppm/C ~ +900 ppm/C 0.1 - 680 WRC4B 0617 4W WRC5B 0617 5.5W PR 700V -80 ppm/C ~ +900 ppm/C 0.01 - 680 Mechanical Specifications A B C D Type / Code Unit Body Length Body Width Lead Length (Bulk) (1) Lead Diameter 0.354 max 0.138 max 1.102 0.079 0.024 0.002 inches WRC1S mm 9.00 max 3.50 max 28.00 2.00 0.60 0.05 0.394 max 0.161 max 1.102 0.079 0.028 0.002 inches WRC1 mm 10.00 max 4.10 max 28.00 2.00 0.72 0.05 WRC2A, WRC3A 0.492 max 0.217 max 1.102 0.118 0.028 0.002 inches WRC4A, WRC5A mm 12.50 max 5.50 max 28.00 3.00 0.72 0.05 WRC3B, WRC4B 0.630 max 0.236 max 1.102 0.118 0.028 0.002 inches mm WRC5B 16.00 max 6.00 max 28.00 3.00 0.72 0.05 (1) SeeResistor Packaging Specification Documen for lead length dimension for tape and reel packaged product. Performance Characteristics Test Test Results Moisture Resistance 5% + 0.05 Thermal Shock 2% + 0.05 Load Life 70C - 1,000 hrs. 5% + 0.05 Shock and Vibration 1% + 0.05 Resistance to Soldering Heat 2% + 0.05 Short Time Overload 3% + 0.05 Operating Temperature Range -55C to +250C Rev Date: 02/29/2016 1 www.seielect.com This specification may be changed at any time without prior notice marketing seielect.com Please confirm technical specifications before you order and/or use. WRC Series Stackpole Electronics, Inc. Conformal Coated Welded Wirewound Resistor Resistive Product Solutions Power Derating Curve: 120 100 85C 2A, 3A, 4A, 5A 80 3B, 4B, 5B 60 1S, 1 40 20 0 225 25 50 100 150 200 250 Ambient Temp. (C) How to Order 1 2 3 4 5 6 7 8 9 10 11 W R C 2 A J A 3 0 0 R Product Series Size Power Tolerance Packaging Resistance Value WRC Standard 1S 1W Code Tol Code Description Size Quantity Four characters with 1 1W J 5% 1S 5,000 the multiplier used as 2A 2W T Tape & Reel 1, 2A, 3A, 4A, 5A 2,000 the decimal holder. 3A 3W 3B, 4B, 5B 1,000 used as multiplier -3 4A 4W 1S, 1 2,000 of 10 for any value A Ammo 5A 5W 2A, 3A, 4A, 5A, 3B, 4B, 5B 1,000 under 0.1 ohm. 3B 3W 0.01 ohm = 10L0 4B 4W 0.1 ohm = R100 5B 5.5W 1 ohm = 1R00 10 ohm = 10R0 Rev Date: 02/29/2016 2 www.seielect.com This specification may be changed at any time without prior notice marketing seielect.com Please confirm technical specifications before you order and/or use. % of Rated Power