SSSSuuuurrrrffffaaaacccceeee MMMMoooouuuunnnntttt HHHHiiiigggghhhh PPPPoooowwwweeeerrrr RRRReeeessssiiiissssttttoooorrrrssss WSMHP Series TO-263 surface mount package Very low thermal resistance Non-inductive, 20, 25 and 35 watt high power resistors Low profile package for high density PCB installation Suitable for board mounting with either solder or clip AEC-Q200 qualified All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2) Electrical Data WSMHP20 WSMHP25 WSMHP35 Conditions Power rating watts 20 25 35 Heatsink with 25C flange temperature Power rating watts 2.5 Without heatsink Thermal resistance C/W 3.3 Resistor hotspot to flange Limiting element voltage volts 500 dc or ac rms Resistance range ohms 0R5 100K Dielectric strength volts 2000 dc for 60s Working temperature range C -55 to 175 Insulation resistance ohms >10G Between terminals and tab Tolerances % 1R0: 5 >1R0: 1, 5 TCR ppm/C 3R0: 300 >3R0-10R: 100 >10R: 50 25 to 105C Standard values E24 preferred Physical Data Dimensions (mm) & Weight (g) A 10.1 0.3 B 10.1 0.3 C 4.6 0.2 D 5.0 1 E 1.27 0.3 F 2.54 0.5 G 3.2 0.2 H 0.43 0.07 J 0.88 0.12 K 1.32 0.15 L 5.08 0.1 M 1.35 0.1 O 1.5 0.5 P 2.54 0.1 P1 0 to 3 P2 0 to 3 Q 6.9 0.3 R 0 to 0.254 T 6.0 1 Wt 1.5 nom. www.ttelectronicsresistors.com SSSSuuuurrrrffffaaaacccceeee MMMMoooouuuunnnntttt HHHHiiiigggghhhh PPPPoooowwwweeeerrrr RRRReeeessssiiiissssttttoooorrrrssss WSMHP Series Performance Data Test Performance R% Load at Rated Power: 2000hrs at rated power 1 R% Short Term Overload: 2 x rated power with applied voltage not to exceed 1.5 x maximum continuous operating voltage for 5 seconds 0.3 R% High Temperature Exposure: MIL-STD-202 method 108, at 175C for 1000hrs, no load 0.25 R% Temperature Cycling: JESD22 method JA-104, -55C/175C, 1000cycles 0.3 R% Biased Humidity: MIL-STD-202 method 103, 1000hrs 85C/85% RH, 10% of operating power 0.5 R% Mechanical Shock: MIL-STD-202 method 213 0.5 R% Vibration: MIL-STD-202 method 204, peak acceleration 5g for 20min, 12 cycles each of 3 orientations, 10-2000Hz 0.2 R% Resistance to Soldering Heat: JIS-C-5201-1 4.18 IEC 60115-1 4.18, 2605C for 10 seconds 0.5 R% HBM ESD: AEC-Q200-002, human body 25kV (AD) 1 Solderability: J-STD-002, 2405C for 3 seconds 90% coverage R% Moisture Resistance: MIL-STD-202 method 106, 10 cycles, 24hours 0.5 R% Bending Strength: AEC-Q200-005, Bending 2mm for 60 seconds 0.25 R% Terminal Strength: AEC-Q200-006, 1.8Kg for 60 seconds 0.2 Temperature Derating Typical Thermal Performance on FR4 Pad Heatsink Dim. x, y P (W) 90C, 35m 50, 40 4.5 45, 35 4 40, 30 3.5 35, 25 3 20, 10 2 Characterisation carried out using 35m PCB copper pad weights, with temperature of 90C used as a maximum reference on the PCB. P (W) is power when the measurement point reaches 90C. 90C, 35m Pulse Performance Typical High Frequency Performance Single Pulse (P << P ) Condition mean r Pulse performance for durations 1s is dependent on mounting conditions. The short term Typical high frequency characteristics for WSMHP35-220R. Self resonant frequency is 1GHz. overload power limit is 2 x power rating for 5s. www.ttelectronicsresistors.com