Product Overview
The Bourns PWR221T-30 Series is a TO-220 style power resistor engineered with thick film on alumina ceramic technology. Designed for current limiting, capacitor discharge, and current measurement circuits, this resistor is ideal for power supplies in telecom and industrial applications, as well as motor drives, test and measurement equipment, and rectifiers. Key features include a low inductance, ceramic backplane, high power rating, and compliance with AEC-Q200 and RoHS standards, ensuring reliability and performance in demanding environments.
Product Attributes
- Brand: Bourns
- Series: PWR221T-30 Series
- Housing Material: Epoxy
- Substrate Material: Alumina (AL203)
- Pin Material: Tinned Copper (Sn/Cu)
- Flammability: Conforms to UL-94V0
- Moisture Sensitivity Level: 1
- ESD Classification (HBM): 3B
- Packaging: 50 pcs./tube
- Compliance: AEC-Q200 compliant, RoHS compliant*
- Origin: COSTA RICA
Technical Specifications
| Parameter | Value(s) |
|---|---|
| Resistance | 0.02 to 130 K (See Popular Resistance Values table) |
| 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 (Steady State) R | 0.5 % |
| High Temperature Exposure R | 0.5 % |
| Power Rating (Free Air) | 2.25 W |
| Power Derating (25C Ambient, FR4 Board) | 2.8 W |
| Dimensions (L x W x H) | 16.26 0.25 x 9.14 0.25 x 15.62 0.25 mm (0.640 .010 x .360 .010 x .615 .010 inches) |
| Model Example | PWR221T-30-10R0F |
| Part Marking Example | 221 30 R500 1% YYWW COSTA RICA |
Note:
*RoHS Directive 2015/863, Mar 31, 2015 and Annex.
**Power rating of 2.25 W when mounted free to air (no heat sink).
*** 5 % Tolerance available for most values. Check Popular Resistance Values table.
2411061755_BOURNS-PWR221T-30-R030J_C3535313.pdf
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