Document
0
Features
n TO-220 housing n Low inductance n Ceramic backplane n High power rating n RoHS compliant*
Applications
n Power supplies n Motor drives n Test and measurement n Rectifiers
PWR221T-50 Series Power Resistor
General Information
Bourns® PWR221T-50 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.
Additional Information Click these links for more information:
Electrical & Thermal Characteristics
Parameter Resistance (See Popular Resistance Values table) Power Rating @ 25 °C Case Temperature Tolerance Hot TCR
0.100 Ω ≤ R ≤ 130.0 KΩ 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
Value(s) 0.02 Ω to 130 KΩ 50 W(1) ±1 %(2), ±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
(1) Power rating of 2.25 W when mounted free to air (no heat sink). (2) Available for most values. Check Popular 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 %
Material Characteristics
Resistor....................................Thick film Substrate...................... Alumina (AL203) Housing......................................... Epoxy Pins....................Tinned Copper (Sn/Cu) Flammability......... Conforms to UL-94V0 Moisture Sensitivity Level......................1
Packaging ............................................ 50 pcs./tube
PRODUCT TECHNICAL INVENTORY SAMPLES CONTACT LIBRARY
Popular Resistance Values
Code
R020 R025 R030 R033 R040 R050 R075 R100 R150 R200 R250 R300 R330 R400 R500 R750 1R00 1R50 2R00 2R50 3R00 3R30 4R00 5R00 7R50 8R00 10R0 12R0 15R0 20R0 25R0 27R0 30R0 33R0 40R0 47R0 50R0 56R0 75R0
Resistance Value
0.02 Ω(3) 0.025 Ω(3) 0.03 Ω(3) 0.033 Ω(3) 0.04 Ω(3) 0.05 Ω(3) 0.075 Ω(3)
0.1 Ω 0.15 Ω 0.2 Ω 0.25 Ω 0.3 Ω 0.33 Ω 0.4 Ω 0.5 Ω 0.75 Ω
1Ω 1.5 Ω 2Ω 2.5 Ω 3Ω 3.3 Ω 4Ω 5Ω 7.5 Ω 8Ω 10 Ω 12 Ω 15 Ω 20 Ω 25 Ω 27 Ω 30 Ω 33 Ω 40 Ω 47 Ω 50 Ω 56 Ω 75 Ω
Code
1000 1200 1500 2000 2500 3000 3300 4000 4700 5000 5600 7500 1001 1501 2001 2501 3001 3301 4001 5001 7501 1002 1502 2002 2502 3002 3302 4002 4702 5002 5602 6802 7502 8202 1003 1153 1203 1253 1303
Resistance Value
100 Ω 120 Ω 150 Ω 200 Ω 250 Ω 300 Ω 330 Ω 400 Ω 470 Ω 500 Ω 560 Ω 750 Ω 1.0 KΩ 1.5 KΩ 2.0 KΩ 2.5 KΩ 3.0 KΩ 3.3 KΩ 4.0 KΩ 5.0 KΩ 7.5 KΩ 10 KΩ 15 KΩ 20 KΩ 25 KΩ 30 KΩ 33 KΩ 40 KΩ 47 KΩ 50 KΩ 56 KΩ 68 KΩ 75 KΩ 82 KΩ 100 KΩ 115 KΩ 120 KΩ 125 KΩ 130 KΩ
(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.
PWR221T-50 Series Power Resistor
Product Dimensions
3.18 ± 0.1 (.125 ± .004)
DIA.
10.41 ± 0.25 (.410 ± .010)
CL
3.18 ± 0.25 (.125 ± .010)
LC 3.18 ± 0.25 (.125 ± .010)
15.62 ± 0.25 (.615 ± .010)
REFERENCE BOARD SURFACE
12.7 ± 1.27 (.500 ± .050)
2.54 ± 0.25 (.100 ± .010)
1.38 ± 0.25 (.054 ± .010)
16.26 ± 0.25 (.640 ± .010)
8.38 ± 0.25 (.330 ± .010)
CERAMIC
2.92 ± 0.25 (.115 ± .010)
CERAMIC
9.14 ± 0.25 (.360 ± .010)
CERAMIC
1.02 ± 0.25 (.040 ± .010)
CERAMIC
5.08 ± 0.25 (.200 ± .010)
0.72 ± 0.12 (.029 ± .005)
1.03 ± 0.25 (.041 ± .010)
DIMENSIONS:
MM (INCHES)
TOLERANCE: ±
0.38 (0.015)
UNLESS OTHERWISE NOTED
Pulse Power Rating
100
10
Energy in Joules
1
0.1
0.01 10 - 6
10 - 5
10- 4
10- 3
10 - 2
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.
How to Order PWR 221 T - 50 - 10R0 F
Model PWR = Power
Resistor
Package 221 = TO-220 Style
Pin .