Surface Mount High Power Resistors 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 Power rating Power rating Thermal resistance Limiting element voltage Resistance range Dielectric strength Working temperature range Insulation resistance Tolerances TCR Standard values watts watts C/W volts ohms volts C ohms % ppm/C 20 WSMHP25 WSMHP35 25 35 2.5 3.3 500 0R5 - 100K 2000 -55 to 175 >10G 1R0: 5 >1R0: 1, 5 3R0: 300 >3R0-10R: 100 >10R: 50 E24 preferred Conditions Heatsink with 25C flange temperature Without heatsink Resistor hotspot to flange dc or ac rms dc for 60s Between terminals and tab 25 to 105C 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 Surface Mount High Power Resistors WSMHP Series Performance Data Test Performance 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 High Temperature Exposure: MIL-STD-202 method 108, at 175C for 1000hrs, no load Temperature Cycling: JESD22 method JA-104, -55C/175C, 1000cycles Biased Humidity: MIL-STD-202 method 103, 1000hrs 85C/85% RH, 10% of operating power Mechanical Shock: MIL-STD-202 method 213 Vibration: MIL-STD-202 method 204, peak acceleration 5g for 20min, 12 cycles each of 3 orientations, 10-2000Hz Resistance to Soldering Heat: JIS-C-5201-1 4.18 IEC 60115-1 4.18, 2605C for 10 seconds HBM ESD: AEC-Q200-002, human body 25kV (AD) Solderability: J-STD-002, 2405C for 3 seconds Moisture Resistance: MIL-STD-202 method 106, 10 cycles, 24hours Bending Strength: AEC-Q200-005, Bending 2mm for 60 seconds Terminal Strength: AEC-Q200-006, 1.8Kg for 60 seconds Temperature Derating R% R% R% R% R% R% R% R% R% R% R% R% 1 0.3 0.25 0.3 0.5 0.5 0.2 0.5 1 90% coverage 0.5 0.25 0.2 Typical Thermal Performance on FR4 Pad Heatsink Dim. x, y 50, 40 45, 35 40, 30 35, 25 20, 10 P90C, 35m (W) 4.5 4 3.5 3 2 Characterisation carried out using 35m PCB copper pad weights, with temperature of 90C used as a maximum reference on the PCB. P90C, 35m (W) is power when the measurement point reaches 90C. Pulse Performance Typical High Frequency 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 WSMHP35-220R. Self resonant frequency is 1GHz. www.ttelectronicsresistors.com Surface Mount High Power Resistors WSMHP Series Packing WSMHP components are packed on 330mm diameter reels, with 100mm inner diameter, in tape of width 24mm and with a quantity of 500 pieces per reel. The dimensions of the tape and orientation of the component are as shown below. Ordering Procedure Example: WSMHP35-10KJ (WSMHP35 at 10 kilohms 5%, Pb-free) W S M H P 1 3 5 - 2 1 0 K 3 J 4 1 2 3 4 Type Rating Value Tolerance Packing WSMHP 20 25 35 3 / 4 characters R = ohms K = kilohms F = 1% J = 5% Plastic tape 500/reel www.ttelectronicsresistors.com