PSD227x Series – Riedon™ Thick Film Power Resistors by Bourns

Features

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Formerly a Riedon™ product

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Resistances from 0.05 to 5M Ω

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Resistance tolerances to ±1 %

n

TCR to ±50 PPM/°C

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Power rating to 200 watts

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TO-227 (TO-238) housing

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High reliability

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RoHS compliant*

Applications

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Power supplies

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Motor drives

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Test and measurement

n

Capacitor discharging

n

Snubber circuits

n

Current limiting

Electrical Characteristics

Bourns Model

Power Rating

@ 70 ℃

with Heat Sink

Resistance

Range

(Ω)

TCR1

(PPM/°C)

Tolerance

Thermal

Resistance

Dielectric

Withstanding

Voltage

PSD2272,

PSD2274

100 W

0.05 to 0.09 Ω

±300

±2 %

±5 %

±10 %

0.7 K/W

1500 VDC

0.1 to 5 MΩ

±100

±1 %

±2 %

±5 %

±10 %

PSD2272H,

PSD2274H

200 W

0.05 to 0.09 Ω

±300

±2 %

±5 %

±10 %

0.35 K/W

0.1 to 5 MΩ

±100

±1 %

±2 %

±5 %

±10 %

1. ±50 PPM/℃ available upon request

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Environmental Characteristics

Specification

Value

Operating Temperature

-40 °C to +155 °C

Inductivity

≤50 nH

Max. Torque

Backplate

Terminals

1.5 Nm

1.3 Nm

Storage Conditions

Temperature

Humidity

+5 °C to +35 °C

40 % to 75 %

Moisture Sensitivity Level

1

*RoHS Directive 2015/863, Mar 31, 2015 and Annex.

Specifications are subject to change without notice. Users should verify actual device performance in their specific

applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the

last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

“Bourns” is a registered trademark of Bourns, Inc. in the United States and other countries.

In April 2023, BE Services Company, Inc., a subsidiary of Bourns, Inc., purchased certain assets of Riedon, Inc.,

including its logo and trademarks and the right to continue to manufacture former Riedon™ products.

“Riedon Logo” is a registered trademark of BE Services Company, Inc., in the United States.

“Riedon” is a trademark of BE Services Company, Inc.

CALIFORNIA WARNING: Can expose you to lead, a carcinogen and reproductive toxicant.

See www.P65Warnings.ca.gov

Americas: Tel: +1 951-781-5500

Email: americus@bourns.com

Mexico: Tel: +52-614-478-0400

Email: mexicus@bourns.com

Asia: Tel: +886-2-2562-4117

Email: asiacus@bourns.com

EMEA: Tel: +36 88 885 877

Email: eurocus@bourns.com

www.bourns.com

2

4

3

1

PSD2272

10R0 1%

PSD2274

10R0 1%

Packaging Information

Bulk ...............................................50 pcs./box