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, high power rating, and compliance with AEC-Q200 and RoHS standards, ensuring reliability and performance in challenging environments. This series is suitable for applications such as power supplies, motor drives, test and measurement equipment, and rectifiers.
Product Attributes
- Brand: Bourns
- Series: PWR221T-30
- Housing Material: Epoxy
- Pin Material: Tinned Copper (Sn/Cu)
- Substrate Material: Alumina (AL2O3)
- Flammability: Conforms to UL-94V0
- Moisture Sensitivity Level: 1
- ESD Classification (HBM): 3B
- Certifications: AEC-Q200 compliant, RoHS compliant*
- Country of Origin: Costa Rica
- Packaging: 50 pcs./tube
Technical Specifications
| Parameter | Value(s) |
|---|---|
| Resistance | 0.02 to 130 K (See Popular Resistance Values table) |
| Power Rating @ 25 C Case Temperature | 30 W** |
| Power Rating (Free Air @ 25C) | 2.25 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 (Steady State) R | 0.5 % |
| High Temperature Exposure R | 0.5 % |
| Model Number Breakdown | PWR = Power Resistor, 221 = TO-220 Style, T = Through-hole, 30 = 30 W |
| Tolerance Code | F = 1 %, J = 5 % |
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
** Power rating of 2.25 W when mounted free to air (no heat sink).
*** Available for most values. Check Popular Resistance Values table.
2410311218_BOURNS-PWR221T-30-R250F_C3478710.pdf
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