Solid State Relays

Solid State Relays (SSR's) are high-speed semiconductor load switching relays that when used with 3-Term (PID) temperature controllers provide a much improved accuracy and reliability than contactor alternatives.

SSR's are cheap and reliable, they have no moving parts to wear out, a quick response time, enabling tighter control of the application and silent operation.

The design of the case removes the need for a separate finger-guard as contact between the terminals and fingers is prevented by integral guards.

The SSR's are available with either a low voltage dc input for direct connection to a suitably equipped temperature controller, or with a high voltage ac input for temperature controllers for direct replacement of a contactor.

Logic Input: For use with temperature controllers with dc voltage outputs.

Mains Input: For use with temperature controllers with a relay output which is switching a high ac voltage. This option is typically for use in systems that previously used a contactor.

Heatsink: A heatsink is available to substantially increase the heat disipation of the SSR. An optional clip is available to enable to heatsink to be mounted onto a DIN rail.

NOTE: We recommend the use of a heat transfer compound applied between the base of the SSR and the metal fixing plate or heatsink in all applications. This is to increase the transfer of heat away from the SSR, improving reliability. Infrakote heat transfer compound is ideal for this application.

Features & Benefits

• Logic (3-32V dc) Or 240V ac Input
• 5000V Input / Output Isolation
• DIN Rail Mounting Heatsink
• 10, 25 Or 40 Amp Outputs
• Built-In Snubber Network
• LED Status Indicator
• CE Approved
• Ex-Stock

Heatsink Details

• Size: 50 x 80 x 70mm (W x D x H)
• Part Number: SSR-HEATSINK
• DIN Clip P/N: SSR-HEATSINK-CLIP

Parameter

SSRV-L-25A

SSRV-L-40A

SSRV-M-25A

Size w x d x h (mm)

45.0 x 68.0 x 25.0

45.0 x 68.0 x 25.0

45.0 x 68.0 x 25.0

Input Rating

4 - 32V dc

4 - 32V dc

90 - 280V ac

Must Operate Voltage

4.0V dc

4.0V dc

80V ac

Must Release Voltage

3.5V dc

3.5V dc

80V ac

Input Impedance

1500R

1500R

40kR

Input Current

5 mA @ 24V dc

5 mA @ 24V dc

0.6 mA @ 240V ac

Operating Voltage (V ac @ 50/60Hz)

90 - 280

90 - 280

90 - 280

Max Load Current (A rms)

25

40

25

Max Peak Surge (A)

260

420

260

Max On-State Voltage Drop

1.6V rms

1.6V rms

1.6V rms

Max Off-State Leakage Current

1mA rms

1mA rms

1mA rms

Min Off-State dv/dt

1000 V/usec

1000 V/usec

1000 V/usec

Transient Over Voltage

800V

800V

800V

Max Turn On Time

1/2 Cycle

1/2 Cycle

1/2 Cycle

Isolation Voltage (I/P - O/P)

5000V rms

5000V rms

5000V rms

Weight

110g

110g

110g

Status Indicating Display

Red LED

Red LED

Red LED

Operating Temperature

-40 - 80^oC

-40 - 80^oC

-40 - 80^oC

Storage Temperature

-40 - 125^oC

-40 - 125^oC

-40 - 125^oC