Product Overview
The Bourns PWR221T-30 Series is a TO-220 style power resistor engineered with thick film on alumina ceramic technology. It is designed for applications requiring current limiting, capacitor discharge, or current measurement, commonly found in 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, making it suitable for demanding applications such as power supplies, motor drives, test and measurement equipment, and rectifiers.
Product Attributes
- Brand: Bourns
- Series: PWR221T-30
- Housing: TO-220 style
- Technology: Thick film on alumina ceramic
- Material - Substrate: Alumina (AL203)
- Material - Housing: Epoxy
- Material - Pins: Tinned Copper (Sn/Cu)
- Flammability: Conforms to UL-94V0
- Moisture Sensitivity Level: 1
- ESD Classification (HBM): 3B
- Packaging: 50 pcs./tube
- Certifications: AEC-Q200 compliant, RoHS compliant*
- Origin: Costa Rica
- Automotive Grade: Yes
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 @ 25 C) | 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 Example | PWR221T-30-10R0F |
| Part Marking Example | 221 30 R500 1% YYWW COSTA RICA |
*RoHS Directive 2015/863, Mar 31, 2015 and Annex.
** Power rating of 2.25 W when mounted free to air (no heat sink).
*** Available for most values. Check Popular Resistance Values table.
Note: Specifications are subject to change without notice. Users should verify actual device performance in their specific applications.
2410301800_BOURNS-PWR221T-30-R200J_C6365479.pdf
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