PL IA NT CO M *R oH S 0 13 % 2 25R0 1 8 01 2 A ST A RIC CO Features Applications ■ TO-220 housing ■ Power supplies ■ Low inductance ■ Motor drives ■ Ceramic backplane ■ Test and measurement ■ High power rating ■ Rectifiers ■ RoHS compliant* PWR221T-30 Series Power Resistor General Information Bourns® PWR221T-30 Series is a TO-220 style power resistor made using thick film on alumina ceramic technology. It is used in current limiting, capacitor discharge or current measurement circuits in power supplies for telecom and industrial applications. Electrical & Thermal Characteristics Material Characteristics Parameter Resistance (See table of standard values) Power Rating @ 25 ˚C Case Temperature Tolerance TCR 0.100 Ω<R<130.0K Ω 0.050 Ω<R<0.100 Ω 0.020 Ω<R<0.050 Ω Thermal Resistance - Rthj Inductance Operating Voltage Dielectric Strength Insulation Resistance Operating Temperature Resistor .................................. Thick film Substrate ......................Alumina (AL203) Housing ........................................Epoxy Pins....................Tinned Copper (Sn/Cu) Flammability ........Conforms to UL-94V0 Value(s) 0.02 Ω to 130 KΩ 30 W** ±1 %***, ±5 % ±100 PPM/˚C ±300 PPM/˚C ±600 PPM/˚C 4.2 ˚C/W 0.1 µH maximum √P*R with a maximum of 250 V 2 KV AC 10 GΩ -55 ˚C to +150 ˚C ** Power rating of 2.25 W when mounted free to air (no heat sink). *** Available for most values. Check Standard Resistance Values table. Reliability Characteristics Parameter Short Term Overload (2x Pr for R < 2 Ω, 1.6 x Pr for R ≥ 2 Ω, V < 1.5 x Operating Voltage) Load Life (2000 hours at rated power) Thermal Shock (-55 ˚C to 155 ˚C, 5 cycles) Resistance to Soldering Heat (10 seconds at 270 ˚C) Vibration (20 G 10-2000 Hz .06 ” D.A.) Terminal Strength (MIL-STD-202, Method 211 Test A1) Shock (Saw Tooth: 100 g/6 ms) Humidity (Steady State) 1000 hrs. 85 °C/85 % RH High Temperature Exposure (100 hrs - 40 % Pr @ +125 °C) Specification ΔR ±0.25 % ΔR ±1.0 % ΔR ±0.5 % ΔR ±0.5 % ΔR ±0.25 % ΔR ±0.2 % ΔR ±0.5 % ΔR ±0.5 % ΔR ±0.5 % Packaging ............................................50 pcs./tube Standard Resistance Values Code Resistance Value Code Resistance Value 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 *** 5 % Tolerance Typical Part Marking Derating Curve 120 MODEL NUMBER Power Ratio (%) 100 80 RESISTANCE CODE 60 MANUFACTURER'S TRADEMARK 221 30 R500 1% 902 COSTA RICA TOLERANCE DATE CODE COUNTRY OF ORIGIN 40 20 0 25 35 45 55 65 75 85 95 105 Case Temperature (°C) 115 125 135 145 150 *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. PWR221T-30 Series Power Resistor Product Dimensions 10.41 ± 0.25 (.410 ± .010) 3.18 ± 0.25 (.125 ± .010) CL 1.38 ± 0.25 (.054 ± .010) 3.18 ± 0.1 (.125 ± .004) DIA. 8.38 ± 0.25 (.330 ± .010) CERAMIC 2.92 ± (.115 ± CERA 3.18 ± 0.25 (.125 ± .010) 16.26 ± 0.25 (.640 ± .010) 9.14 ± 0.25 (.360 ± .010) CERAMIC 1.02 ± 0.25 (.040 ± .010) CERAMIC 2.54 ± 0.25 (.100 ± .010) 12.7 ± 1.27 (.500 ± .050) 0.72 ± 0.12 (.029 ± .005) 5.08 ± 0.25 (.200 ± .010) 1.03 ± 0.25 (.041 ± .010) DIMENSIONS: MM (INCHES) How to Order Pulse Power Rating PWR 221 T - 30 - 10R0 F 100 Model PWR = Power Resistor Package 220 = TO-220 Style Energy in Joules 10 Pin Style T = Through-hole Power 30 = 30 W 1 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) 0.1 0.01 10 - 6 10 - 5 10 -4 10 - 3 10 -2 Absolute Tolerance J=5% F=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. 06/10 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.