Product Overview
The Bourns PWR221T-30 Series is a TO-220 style power resistor manufactured using thick film on alumina ceramic technology. Designed for current limiting, capacitor discharge, and current measurement circuits, it 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 directives. The resistor offers a wide resistance range and is available in various tolerances, with a power rating of 30W @ 25C case temperature.
Product Attributes
- Brand: Bourns
- Series: PWR221T-30 Series
- 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
- Certifications: AEC-Q200 compliant, RoHS compliant
- Origin: COSTA RICA
- Grade: AUTOMOTIVE GRADE
Technical Specifications
| Parameter | Value(s) |
|---|---|
| Resistance | 0.02 to 130 K |
| 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 (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 (Free Air @ 25C) | 2.8 W (on double-sided copper board using FR4 standard, 70 m copper, 39x30x1.6 mm) |
| Model Example | PWR221T-30-10R0F |
| Part Marking Example | 221 30 R500 1% YYWW COSTA RICA |
Note: Specifications are subject to change without notice. Users should verify actual device performance in their specific applications.
2410301800_BOURNS-PWR221T-30-1100J_C19947485.pdf
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