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ceramic substrate resistor BOURNS PWR221T-50-1R00F designed for current limiting and measurement tasks

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ceramic substrate resistor BOURNS PWR221T-50-1R00F designed for current limiting and measurement tasks

Type : Thick Film Resistor

Resistance : 1Ω

Power(Watts) : 50W

Temperature Coefficient : ±100ppm/℃

Tolerance : ±1%

Operating Temperature : -55℃~+150℃

Description : Thick Film Resistor 1Ω 50W ±100ppm/℃ ±1% TO-220 Through Hole Resistors RoHS

Mfr. Part # : PWR221T-50-1R00F

Model Number : PWR221T-50-1R00F

Package : TO-220

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Product Overview

The Bourns PWR221T-50 Series is a high-power resistor designed with a TO-220 style housing and a ceramic backplane, featuring low inductance. Manufactured using thick film on alumina ceramic technology, this resistor is ideal for current limiting, capacitor discharge, and current measurement circuits within power supplies for telecom and industrial applications. Its robust construction and high power rating make it suitable for demanding applications such as power supplies, motor drives, test and measurement equipment, and rectifiers. The series is RoHS compliant.

Product Attributes

Brand: Bourns
Series: PWR221T-50
Housing Material: Epoxy
Substrate Material: Alumina (AL203)
Pin Material: Tinned Copper (Sn/Cu)
Flammability: Conforms to UL-94V0
Moisture Sensitivity Level: 1
Packaging: 50 pcs./tube
Certifications: RoHS compliant
Origin: Costa Rica (Manufacturer's Trademark)

Technical Specifications

Parameter	Value(s)
Resistance	0.02 to 130 K (See Popular Resistance Values table)
Power Rating @ 25 C Case Temperature	50 W⁽¹⁾
Power Rating (Free Air @ 25 C)	2.25 W⁽¹⁾
Tolerance	1%⁽²⁾, 5 %
Hot TCR (0.100 R 130.0 K)	100 PPM/C
Hot TCR (0.050 R 0.100 )	300 PPM/C
Hot TCR (0.020 R 0.050 )	600 PPM/C
Thermal Resistance (Rthj)	2.5 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 at rated power) (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 %
Product Dimensions (L x W x H)	16.26 x 9.14 x 8.38 mm (0.640 x 0.360 x 0.330 inches)
Model Number Structure	PWR221T-50-ResistanceCode-ToleranceCode
Tolerance Code F	1 %
Tolerance Code J	5 %
Typical Part Marking	221 50 ResistanceCode ToleranceCode YYWW COUNTRY OF ORIGIN

⁽¹⁾ Power rating of 2.25 W when mounted free to air (no heat sink).

⁽²⁾ 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.

2411061755_BOURNS-PWR221T-50-1R00F_C3533983.pdf

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