WRC Series Stackpole Electronics, Inc. Conformal Coated Welded 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 Bulk packaging available - contact Stackpole for package quantities Bulk packaging available - contact Stackpole for package quantities * * * Electrical Specifications Type / Code Size Power Rating (Watts) @ 25C Maximum Working Voltage WRC1S 0309 1W PR Ohmic Range () and Tolerance Dielectric Withstanding Voltage (RMS) Resistance Temperature Coefficient 700V -80 ppm/C ~ +900 ppm/C 0.1 - 100 5% WRC1 0410 1W PR 700V -80 ppm/C ~ +900 ppm/C 0.1 - 470 WRC2A 0416 2W PR 700V -80 ppm/C ~ +900 ppm/C 0.1 - 470 WRC3A 0416 3W PR 700V -80 ppm/C ~ +900 ppm/C 0.1 - 470 WRC4A 0416 4W PR 700V -80 ppm/C ~ +900 ppm/C 0.1 - 470 WRC5A 0416 5W PR 700V -80 ppm/C ~ +900 ppm/C 0.1 - 470 WRC3B 0617 3W PR 700V -80 ppm/C ~ +900 ppm/C 0.1 - 680 WRC4B 0617 4W PR 700V -80 ppm/C ~ +900 ppm/C 0.1 - 680 WRC5B 0617 5.5W PR 700V -80 ppm/C ~ +900 ppm/C 0.01 - 680 Mechanical Specifications A B C D Body Length Body Width Lead Length (Bulk) (1) Lead Diameter WRC1S 0.354 max 9.00 max 0.138 max 3.50 max 1.102 0.079 28.00 2.00 0.024 0.002 0.60 0.05 inches mm WRC1 0.394 max 10.00 max 0.161 max 4.10 max 1.102 0.079 28.00 2.00 0.028 0.002 0.72 0.05 inches mm WRC2A, WRC3A, WRC4A, WRC5A 0.492 max 12.50 max 0.217 max 5.50 max 1.102 0.118 28.00 3.00 0.028 0.002 0.72 0.05 inches mm WRC3B, WRC4B, WRC5B 0.630 max 16.00 max 0.236 max 6.00 max 1.102 0.118 28.00 3.00 0.028 0.002 0.72 0.05 inches mm Type / Code Unit (1) See "Resistor Packaging Specification Document" 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: 07/27/2012 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. 1 www.seielect.com marketing@seielect.com WRC Series Stackpole Electronics, Inc. Conformal Coated Welded Wirewound Resistor Resistive Product Solutions % of Rated Power Power Derating Curve: 120 100 80 60 40 20 0 85C 2A, 3A, 4A, 5A 3B, 4B, 5B 1S, 1 25 50 100 150 200 Ambient Temp. (C) 225 250 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 Standard WRC Power 1W 1W 2W 3W 4W 5W 3W 4W 5.5W Size 1S 1 2A 3A 4A 5A 3B 4B 5B Tolerance Tol Code 5% J Packaging Code Description T Tape & Reel A Ammo Size 1S 1, 2A, 3A, 4A, 5A 3B, 4B, 5B 1S 1, 2A, 3A, 4A, 5A, 3B, 4B, 5B Quantity 5,000 2,000 1,000 2,000 1,000 Resistance Value Four characters with the multiplier used as the decimal holder. "L" used as multiplier -3 of 10 for any value under 0.1 ohm. 0.01 ohm = 10L0 0.1 ohm = R100 1 ohm = 1R00 10 ohm = 10R0 Legacy Part Number (before January 3, 2011): SEI Type Code Nominal Resistance Tolerance Packaging WRC 2A 300 5% A Type WRC Description Standard Size 1S 1 2A 3A 4A 5A 3B 4B 5B Power 1W 1W 2W 3W 4W 5W 3W 4W 5.5W 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. Tolerance 5% 2 Values E24 Type 1S 1, 2A, 3A, 4A, 5A 3B, 4B, 5B 1S 1, 2A, 3A, 4A, 5A, 3B, 4B, 5B Pkg Qty 5,000 2,000 1,000 2,000 1,000 Description Code Tape and Reel R Ammo A www.seielect.com marketing@seielect.com