Product Overview
The Bourns PWR221T-50 Series is a high-power TO-220 style resistor manufactured using thick film on alumina ceramic technology. Designed for demanding applications, it excels in current limiting, capacitor discharge, and current measurement circuits within power supplies for telecom and industrial sectors. Its robust construction features a ceramic backplane and low inductance, ensuring reliable performance in power supplies, motor drives, test and measurement equipment, and rectifiers. This series is RoHS compliant, offering a dependable solution for high-power resistor needs.
Product Attributes
- Brand: Bourns
- Series: PWR221T-50
- Housing Material: Epoxy
- Substrate Material: Alumina (AL203)
- Pin Material: Tinned Copper (Sn/Cu)
- Flammability: Conforms to UL-94V0
- Moisture Sensitivity Level: 1
- RoHS Compliant: Yes
- Origin: COSTA RICA
Technical Specifications
| Specification | Value(s) |
|---|---|
| Model Series | PWR221T-50 |
| Resistance Range | 0.02 to 130 K |
| Power Rating @ 25 C Case Temperature | 50 W |
| Power Rating (Free Air @ 25 C) | 2.25 W |
| Tolerance | 1 % (F), 5 % (J) |
| Hot TCR (0.100 R 130.0 K) | 100 PPM/C |
| Hot TCR (0.050 R 0.100 ) | 300 PPM/C |
| Hot TCR (0.020 R 0.050 ) | 600 PPM/C |
| Thermal Resistance (Rthj) | 2.5 C/W |
| Inductance | 0.1 H maximum |
| Operating Voltage | P*R with a maximum of 250 V |
| Dielectric Strength | 2 KV AC |
| Insulation Resistance | 10 G |
| Operating Temperature | -55 C to +150 C |
| Short Term Overload R | 0.25 % |
| Load Life (2000 hours) R | 1.0 % |
| Thermal Shock R | 0.5 % |
| Resistance to Soldering Heat R | 0.5 % |
| Vibration R | 0.25 % |
| Terminal Strength R | 0.2 % |
| Shock R | 0.5 % |
| Humidity (Steady State) R | 0.5 % |
| High Temperature Exposure R | 0.5 % |
| Packaging | 50 pcs./tube |
| Dimensions (L x W x H) | 16.26 x 10.41 x 8.38 mm (approx.) |
| Part Marking Example | 221 50 R500 1% YYWW COSTA RICA |
Note: Specifications are subject to change without notice. Users should verify actual device performance in their specific applications.
2411061726_BOURNS-PWR221T-50-56R0J_C3381022.pdf
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