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. It offers high power rating, low inductance, and compliance with AEC-Q200 and RoHS standards, ensuring reliability and performance in demanding environments.
Product Attributes
- Brand: Bourns
- Series: PWR221T-30
- Housing: TO-220 style
- Technology: Thick film on alumina ceramic
- Substrate Material: Alumina (AL2O3)
- 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
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 < 130.0 K) | 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 (2000 hours at rated power) | 1.0 % |
| Thermal Shock R (-55 C to 155 C, 5 cycles) | 0.5 % |
| Resistance to Soldering Heat R (10 seconds at 270 C) | 0.5 % |
| Vibration R (20 G 10-2000 Hz .06 D.A.) | 0.25 % |
| Terminal Strength R (MIL-STD-202, Method 211 Test A1) | 0.2 % |
| Shock R (Saw Tooth: 100 g/6 ms) | 0.5 % |
| Humidity R (Steady State) 1000 hrs. 85 C/85 % RH | 0.5 % |
| High Temperature Exposure R (100 hrs - 40 % Pr @ +125 C) | 0.5 % |
| Dimensions (L x W x H) | 16.26 0.25 (.640 .010) x 10.41 0.25 (.410 .010) x 8.38 0.25 (.330 .010) mm (inches) |
| Model Number Example | PWR221T-30-10R0F |
| Part Marking Example | 221 30 R500 1% YYWW COSTA RICA |
Popular Resistance Values: R020 (0.02 ) to 1303 (130 K)
How to Order: PWR = Power Resistor, 221 = TO-220 Style, T = Through-hole, 30 = 30 W, Resistance Value (e.g., 10R0 for 10 , 2000 for 200 , 3002 for 30 K), Tolerance (J=5%, F=1%)
Power Derating Curve: Depicts rated power percentage vs. case temperature.
Pulse Power Rating: Energy absorbed by the resistor in Joules, dependent on peak power and pulse length. Overload voltage should not exceed 1.5 times the maximum operating voltage.
Soldering Profile: Includes temperature and time parameters for ramp up, preheat, peak, and ramp down stages.
Power dissipation: 2.8 W at 25 C ambient when mounted on a double-sided copper board (FR4 standard, 70 m copper, 39 x 30 x 1.6 mm).
*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.
2411061746_BOURNS-PWR221T-30-2R20J_C3433003.pdf
Please Use Our Online Inquiry Contact Form Below If You Have Any Questions, Our Team Will Get Back To You As Soon As Possible
