PL IA NT CO M *R oH S 0 02 % 2 2302 1 3 3 92 TA A RIC S CO Features Applications ■ TO-220 housing ■ Power supplies ■ Low inductance ■ Motor drives ■ Resistor electrically isolated from the ■ Test and measurement backplate ■ High power rating ■ RoHS compliant* ■ Rectifiers PWR220T-20 Series Power Resistor General Information Bourns® PWR220T-20 Series is a TO-220 DPAK style power resistor. Manufactured using thick film on alumina ceramic technology, it is used in current measurement, snubber, bleeder and discharge circuits. Electrical & Thermal Characteristics Material Characteristics Parameter Resistor .................................. Thick film Substrate ......................Alumina (AL203) Housing ........................................Epoxy Pins....................Tinned Copper (Sn/Cu) Flammability ........Conforms to UL-94V0 Value(s) Resistance (See table of standard values) 0.02 Ω to 130 KΩ Power Rating @ 25 ˚C Case Temperature 20 W Tolerance ±1 %**, TCR 0.02 Ω<R<130.0K Ω ±100 PPM/˚C Thermal Resistance - Rthj 6.5 ˚C/W Inductance 0.1 µH maximum ±5 % Packaging ............................................50 pcs./tube Operating Voltage √P*R with a maximum of 250 V Dielectric Strength 2 KV AC Insulation Resistance 10 GΩ Code Resistance Value Code Resistance Value Operating Temperature -55 ˚C to 155 ˚C R020 R050 R100 R500 R750 1R00 1R50 2R00 2R20 2R50 3R00 3R30 4R70 5R00 7R50 8R20 10R0 15R0 0.02*** 0.05*** 0.1 0.5 0.75 1 1.5 2 2.2 2.5 3 3.3 4.7 5 7.5 8.2 10 15 20R0 30R0 33R0 47R0 50R0 56R0 75R0 1000 2000 3300 4700 7500 1001 3301 1002 3002 1003 1303 20 30 33 47 50 56 75 100 200 330 470 7500 1000 3300 10000 33000 100000 130000 ** Available for most values. Check Standard Resistance Values table. Reliability Characteristics Parameter Specification Short Term Overload (2x Pr for R < 2 Ω, 1.6 x Pr for R ≥ 2 Ω, V < 1.5 x Operating Voltage) ΔR ±0.25 % Load Life (1000 hours at rated power) ΔR ±1.0 % Thermal Shock (-55 ˚C to 155 ˚C, 5 cycles) ΔR ±0.5 % Resistance to Soldering Heat (10 seconds at 270 ˚C) ΔR ±0.5 % Vibration (20 G 10-2000 Hz .06 ” D.A.) ΔR ±0.25 % Terminal Strength (MIL-STD-202, Method 211 Test A1) ΔR ±0.2 % Shock (Saw Tooth: 100 g/6 ms) ΔR ±0.5 % Humidity (Steady State) 1000 hrs. 85 °C/85 % RH ΔR ±0.5 % High Temperature Exposure (100 hrs - 40 % Pr @ +125 °C) ΔR ±0.5 % Standard Resistance Values *** 5 % Tolerance Typical Part Marking Derating Curve 120 Power Ratio (%) 100 MODEL NUMBER 80 RESISTANCE CODE 60 MANUFACTURER'S TRADEMARK 40 220 20 R500 1% 902 COSTA RICA TOLERANCE DATE CODE COUNTRY OF ORIGIN 20 0 -20 25 35 45 55 65 75 85 95 105 115 125 135 145 155 Temperature of Backplate (°C) *RoHS Directive 2002/95/EC Jan 27 2003 including Annex. Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. PWR220T-20 Series Power Resistor Product Dimensions How to Order PWR 220 T - 20 - 10R0 F 4.0 (.158) 3.6 DIA. (.142) 10.1 (.398) Model PWR = Power Resistor 1.23 (.049) Package 220 = TO-220 Style 6.0 (.236) Pin Style T = Through-hole 2.5 (.098) Power 20 = 20 W 14.6 (.575 Resistance Value <100 ohms ... “R” represents decimal point (examples: 7R50 = 7.5 Ω; R500 = 0.5 Ω) ≥100 ohms ... First three digits are significant, fourth digit represents number of zeros to follow (examples: 2000 = 200 ohms; 3002 = 30K ohms) 8.63 (.340) 28.3 (1.12) REF. 13.72 (.540) 0.72 (.029) Absolute Tolerance J=5% F=1% 2.25 (.089) 5.08 (.200) DIMENSIONS: MM (INCHES) Pulse Power Rating Energy in Joules 100 10 1 0.1 0.01 10 - 7 10 - 6 10 - 5 10 -4 10 -3 10 -2 10 -1 Overload Duration in Seconds The energy absorbed by the resistor expressed in Joules can be calculated by multiplying the peak power of the pulse in watts times the length of the pulse in seconds. The energy should not exceed the limits shown in the graph. The overload voltage should not exceed 1.5 times the maximum operating voltage. Asia-Pacific: Tel: +886-2 2562-4117 Fax: +886-2 2562-4116 Europe: Tel: +41-41 768 5555 Fax: +41-41 768 5510 The Americas: Tel: +1-951 781-5500 Fax: +1-951 781-5700 www.bourns.com 12/09 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.