Heatsink Mount High Power Resistors WMHP Series TO-220 & TO-247 standard power packages Very low thermal resistance Non-inductive thick film technology 20 to 100 watt high power resistors Single screw mounting to heatsink Suitable for high frequency / fast pulse use All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2) Electrical Data WMHP20 Package style Power rating Power rating Limiting element voltage Resistance range Dielectric strength Working temperature range Insulation resistance Tolerances TCR Standard values WMHP35 WMHP50 watts watts volts ohms volts C ohms % ppm/C 20 1.5 35 2.5 350 WMHP100 Conditions TO-247 TO-220 50 3 100 3.5 700 R05 - 10K 1800 -65 to 150 -65 to 175 >10G 1R0: 5 >1R0: 1, 5 R20: 1000 >R20-3R0: 300 >3R0-10R: 100 >10R: 50 E24 preferred Heatsink with 25C flange temperature Without heatsink, in free air 25C dc or ac rms ac rms for 60s Between terminals and tab 25 to 105C Physical Data A B C D E F G H J K L M Wt Dimensions (mm) & Weight (g) TO-220 TO-247 10.16 0.25 15.75 0.26 14.75 0.25 20.7 0.26 4.44 0.38 4.95 0.26 3.75 0.2 3.63 0.1 13.7 1 14.48 1.27 4 max. 2.79 0.76 5.08 0.25 3.63 0.18 0.78 0.08 1.52 0.1 1.3 0.1 10.16 0.26 6.1 0.25 5.33 0.26 0.55 0.15 0.81 0.26 2.3 0.25 2.41 0.26 2.0 nom. 3.7 nom. TO-247 TO-220 Performance Data Test Load at Rated Power: 2000hrs at rated power Short Term Overload: 2 x rated power with applied voltage not to exceed 1.5 x maximum continuous operating voltage for 5 seconds Damp Heat with Load: 40 2C, 90 - 95% RH, maximum working voltage 1.5 hours on, 0.5 hours off, 1000 hours Thermal Shock: -65C/150C, 100cycles Terminal Strength: 2.4N pull test Performance R% R% R% R% R% 1 0.5 1 0.3 0.2 www.ttelectronicsresistors.com Heatsink Mount High Power Resistors WMHP Series Temperature Derating TO-220 TO-247 Typical High Frequency Performance Pulse Performance Single Pulse (Pmean << Pr) Condition Pulse performance for durations 1s is dependent on mounting conditions. The short term overload power limit is 2 x power rating for 5s. Typical high frequency characteristics for WMHP35-220R. Self resonant frequency is 1GHz. Ordering Procedure Example: WMHP35-10KJ (WMHP35 at 10 kilohms 5%, Pb-free) W M H P 1 3 5 - 1 0 2 3 K J 4 1 2 3 4 Type Rating Value Tolerance Packing WMHP 20 35 50 100 3 / 4 characters R = ohms K = kilohms F = 1% J = 5% Plastic tubes TO-220: 50/tube TO-247: 30/tube www.ttelectronicsresistors.com