Solid-State Relays

Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com

SALES 800-321-6786 • 951-695-3000 • FAX 951-695-3095 • sales@opto22.com • SUPPORT 800-835-6786 • 951-695-3080 • FAX 951-695-3017 • support@opto22.com

© 2006–2014 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.

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Power Series SSR Accessories

Safety Cover

A plastic safety cover (Opto 22 part number SAFETY COVER) is

available for use with Opto 22 Power Series SSRs. The safety

cover reduces the chance of accidental contact with relay

terminals, while providing access holes for test

instrumentation.

SSR-HS Heatsink

Custom designed for the Power Series SSRs, the SSR-HS

heatsink provides excellent heat dissipation when mounted to

the SSR with a matching thermal conductive pad, used in

place of silicon grease. One thermal pad is included with the

heatsink. Additional pads may be purchased in packs of 10

(part number SSR-THERMOPAD). DIN-rail adapter is included.

Thermal Ratings

The thermal ratings shown in the following graphs were

obtained with an SSR attached to a heatsink using a thermal

conductive pad.

45 Amp Relay on SSR-HS Heatsink Derating

25 Amp Relay on SSR-HS Heatsink Derating

Heatsink Assembly

Before attaching the SSR, remove the protective film from

both sides of the thermal pad, then place the pad on the

heatsink making sure to align the holes. Secure the SSR to the

heatsink with the two 8-32 x 3/8˝ panhead Phillips screws

included in the kit. Use 20 in-lb (2.26 N-m) of torque.

An optional plastic safety cover can be installed on a Power Series SSR.

V

H

30

25

20

15

10

5

30

40

50

60

70

80

90 100

20

Ambient Temperature (°C)

V: Heatsink mounted to a vertical surface

H: Heatsink mounted to a horizontal surface.

30

25

20

15

10

5

30

40

50

60

70

80

90 100

20

Ambient Temperature (°C)

V

H

V: Heatsink mounted to a vertical surface

H: Heatsink mounted to a horizontal surface.

Screws

Thermal conductive pad

Power Series SSR

(not included)

Heatsink

NOTE: To take advantage of the

cooling effect of natural air flow,

mount the SSR/heatsink assembly to

a vertical surface with the Opto 22

logo right side up as shown here.