Riedon™ PSD220T-50 Series – SMD Power Resistors by Bourns

Features

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Formerly a Riedon™ product

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Resistance values as low as 0.02 Ω

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Power rating up to 50 W

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Load stability to ±0.5 %

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TO-220 housing

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Thick film technology

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RoHS compliant*

Applications

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Power supplies

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Stepper motor drives

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Input amplifiers

Electrical Characteristics

Bourns Model

Power Rating

@ 70 ℃

Resistance

Range

(Ω)

Tolerance

(%)

TCR

(PPM/°C)

Thermal

Resistance

Dielectric

Strength

PSD220T-50

Heat Sink

Free Air

50 W

2 W

0.02 to 0.049

±2

±5

±600

2.1 K/W

1500 VDC

0.05 to 0.099

±300

0.1 to 15K

±1

±2

±5

±100

(±50 available

on request)

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Environmental Characteristics

Specification

Value

Operating Temperature

-40 °C to +155 °C

Maximum Working Voltage

√P*R with a maximum of 1000 V

Storage Conditions

Temperature

Humidity

+5 °C to +35 °C

40 % to 75 %

Moisture Sensitivity Level

1

Performance Characteristics

Test

Conditions

Test Method

Reference

Limit

Load Life

1000 hours, ON/OFF with rated power at +25 ℃ MIL-STD-202 Method 108

ΔR < ±1 %

High Temperature Exposure +155 °C for 1000 hours

MIL-STD-202 Method 303

ΔR < ±1 %

Low Temperature Storage

-55 ℃ for 24 hours

MIL-STD-202 Method 303

ΔR < ±1 %

Thermal Shock

-55 °C to +155 ℃, 5 cycles

MIL-STD-202 Method 107

ΔR < ±1 %

Humidity Resistance

+40 ℃ / 90 % for 240 hours

MIL-STD-202 Method 103

ΔR < ±1 %

Resistance to Solder Heat

Solder dipping at 260 ℃ for 10 sec.

MIL-STD-202 Method 210

ΔR < ±1 %

Short Time Overload

2.5x rated power for 5 sec.

MIL-STD-202 Method 303

ΔR < ±1 %

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