Product Overview
The Bourns PWR221T-30 Series is a TO-220 style power resistor designed for current limiting, capacitor discharge, and current measurement circuits. Manufactured using thick film on alumina ceramic technology, this resistor offers high power handling capabilities and is suitable for demanding applications in power supplies for telecom and industrial sectors, as well as motor drives, test and measurement, and rectifiers. It features a low inductance, ceramic backplane, and is compliant with AEC-Q200 and RoHS standards.
Product Attributes
- Brand: Bourns
- Series: PWR221T-30
- Housing: TO-220 style
- Technology: Thick film on alumina ceramic
- Substrate Material: Alumina (AL203)
- Housing Material: Epoxy
- 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
- Automotive Grade: Yes
Technical Specifications
| Parameter | Value(s) |
|---|---|
| Resistance Range | 0.02 to 130 K |
| Power Rating @ 25 C Case Temperature | 30 W** |
| Power Rating (Free to 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 (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 % |
| Power Derating Curve | (See graph in original document) |
| Pulse Power Rating | (See graph in original document) |
| Product Dimensions | (See diagram in original document) |
| Typical Part Marking | 221 30 R500 1% YYWW COSTA RICA |
| Soldering Profile | (See diagram in original document) |
| Power Dissipation (FR4 Board) | 2.8 W at 25 C ambient |
*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.
2410301800_BOURNS-PWR221T-50-R100F_C6365490.pdf
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