Features Applications n TO-220 housing n Power supplies n Low inductance n Motor drives n Ceramic backplane n Test and measurement n High power rating n Rectifiers n RoHS compliant* PWR221T-50 Series Power Resistor General Information Additional Information Bourns PWR221T-50 Series is a TO-220 style power resistor made using thick film on Click these links for more information: 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 PRODUCT TECHNICAL INVENTORY SAMPLES CONTACT LIBRARY Parameter Value(s) Resistance (See Popular Resistance Values table) 0.02 to 130 K Popular Resistance Values (1) Power Rating 25 C Case Temperature 50 W (2) Tolerance 1 % , 5 % Resistance Resistance Code Code Value Value Hot TCR (3) R020 0.02 1000 100 0.100 R 130.0 K 100 PPM/C (3) R025 0.025 1200 120 0.050 R 0.100 300 PPM/C (3) R030 0.03 1500 150 0.020 R 0.050 600 PPM/C (3) R033 0.033 2000 200 Thermal Resistance - R 4.2 C/W thj (3) R040 0.04 2500 250 Inductance 0.1 H maximum (3) R050 0.05 3000 300 Operating Voltage P*R with a maximum of 250 V (3) R075 0.075 3300 330 Dielectric Strength 2 KV AC R100 0.1 4000 400 Insulation Resistance 10 G R150 0.15 4700 470 Operating Temperature -55 C to +150 C R200 0.2 5000 500 (1) Power rating of 2.25 W when mounted free to air (no heat sink). R250 0.25 5600 560 (2) Available for most values. Check Popular Resistance Values table. R300 0.3 7500 750 R330 0.33 1001 1.0 K R400 0.4 1501 1.5 K Reliability Characteristics R500 0.5 2001 2.0 K R750 0.75 2501 2.5 K Parameter Specification 1R00 1 3001 3.0 K Short Term Overload (2x Pr for R < 2 , R 0.25 % 1R50 1.5 3301 3.3 K 1.6 x Pr for R 2 , V < 1.5 x Operating Voltage) 2R00 2 4001 4.0 K Load Life (2000 hours at rated power) R 1.0 % 2R50 2.5 5001 5.0 K Thermal Shock (-55 C to 155 C, 5 cycles) R 0.5 % 3R00 3 7501 7.5 K Resistance to Soldering Heat (10 seconds at R 0.5 % 3R30 3.3 1002 10 K 270 C) 4R00 4 1502 15 K Vibration (20 G 10-2000 Hz .06 D.A.) R 0.25 % 5R00 5 2002 20 K Terminal Strength (MIL-STD-202, Method 211 R 0.2 % 7R50 7.5 2502 25 K Test A1) 8R00 8 3002 30 K Shock (Saw Tooth: 100 g/6 ms) R 0.5 % 10R0 10 3302 33 K Humidity (Steady State) 1000 hrs. 85 C/85 % RH R 0.5 % 12R0 12 4002 40 K High Temperature Exposure R 0.5 % 15R0 15 4702 47 K (100 hrs - 40 % Pr +125 C) 20R0 20 5002 50 K 25R0 25 5602 56 K Material Characteristics Packaging 27R0 27 6802 68 K 30R0 30 7502 75 K Resistor ...................................Thick film ............................................ 50 pcs./tube 33R0 33 8202 82 K Substrate ..................... Alumina (AL203) 40R0 40 1003 100 K Housing ........................................Epoxy 47R0 47 1153 115 K Pins....................Tinned Copper (Sn/Cu) 50R0 50 1203 120 K Flammability ........ Conforms to UL-94V0 56R0 56 1253 125 K Moisture Sensitivity Level .....................1 75R0 75 1303 130 K (3) 5 % Tolerance WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov *RoHS Directive 2015/863, Mar 31, 2015 and Annex. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. *RoHS and AEC-Q200 COMPLIANTPWR221T-50 Series Power Resistor Product Dimensions 8.38 0.25 10.41 0.25 3.18 0.25 3.18 0.1 (.330 .010) (.410 .010) (.125 .010) (.125 .004) 1.38 0.25 CERAMIC C DIA. (.054 .010) L 2.92 0.25 (.115 .010) CERAMIC LC 3.18 0.25 (.125 .010) 16.26 0.25 (.640 .010) 9.14 0.25 (.360 .010) 15.62 0.25 CERAMIC (.615 .010) REFERENCE BOARD SURFACE 1.02 0.25 2.54 0.25 (.040 .010) 12.7 1.27 (.100 .010) CERAMIC (.500 .050) MM DIMENSIONS: (INCHES) 0.72 0.12 5.08 0.25 (.029 .005) 0.38 1.03 0.25 (.200 .010) TOLERANCE: UNLESS OTHERWISE NOTED (.041 .010) (0.015) Pulse Power Rating How to Order PWR 221 T - 50 - 10R0 F 100 Model PWR = Power Resistor Package 10 221 = TO-220 Style Pin Style T = Through-hole Power 1 50 = 50 W Resistance Value <100 ohms ... R represents decimal point (examples: 7R50 = 0.1 7.5 R500 = 0.5 ) 100 ohms .... First three digits are significant, fourth digit represents number of zeros to follow (exam- 0.01 ples: 2000 = 200 ohms -6 -5 -4 -3 -2 10 10 10 10 10 3002 = 30K ohms) Absolute Tolerance Overload Duration in Seconds J = 5 % F = 1 % (Available for most values. The energy absorbed by the resistor expressed in Joules can be calculated by Check Popular Resistance multiplying the peak power of the pulse in watts times the length of the pulse in Values table. 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. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. Energy in Joules