Product Overview
The Bourns PWR221T-30 Series is a TO-220 style power resistor engineered with 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. Key features include a low inductance, ceramic backplane, and high power rating, making it suitable for power supplies, motor drives, test and measurement equipment, and rectifiers. This series is AEC-Q200 and RoHS compliant, ensuring reliability and adherence to industry standards.
Product Attributes
- Brand: Bourns
- Series: PWR221T-30
- Housing Material: Epoxy
- Pin Material: Tinned Copper (Sn/Cu)
- Substrate Material: Alumina (AL203)
- Flammability: Conforms to UL-94V0
- Moisture Sensitivity Level: 1
- ESD Classification (HBM): 3B
- Certifications: AEC-Q200 compliant, RoHS compliant
- Origin: Costa Rica
- Packaging: 50 pcs./tube
Technical Specifications
| Parameter | Value(s) |
|---|---|
| Resistance Range | 0.02 to 130 K |
| Power Rating @ 25 C Case Temperature | 30 W** |
| Tolerance | 1%***, 5% |
| TCR (0.100 <R<130.0K ) | 100 PPM/C |
| TCR (0.050 <R<0.100 ) | 300 PPM/C |
| TCR (0.020 <R<0.050 ) | 600 PPM/C |
| Thermal Resistance (Rthj) | 4.2 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 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 R | 0.5 % |
| High Temperature Exposure R | 0.5 % |
| Power Rating (Free Air) | 2.25 W |
| Model Example (PWR221T-30-10R0 F) | Power Resistor, TO-220 Style, Through-hole, 30W, 10, 1% Tolerance |
** Power rating of 2.25 W when mounted free to air (no heat sink).
*** Available for most values. Check Popular Resistance Values table.
2411061753_BOURNS-PWR221T-30-R040J_C3504930.pdf
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