About the Single Phase Solid State Relay DIN Rail

The Single Phase Solid State Relay DIN Rail is part of the ELEHPD Solid State Relay Ssr range. Single Phase Solid State Relay DIN Rail from the ELEHPD Solid State Relay Ssr range. ELEHPD manufactures and exports low voltage electrical products from Yueqing, Zhejiang, China, supplying distributors, panel builders, M&E contractors and OEM buyers worldwide.

Full catalogue description: Single Phase Solid State Relay DIN Rail Mounted DC Control AC Heat Sink Integrated SSR

Typical applications

Motor control centres and pump or fan starters
Machine building, conveyors, packaging and CNC equipment
HVAC control panels and building automation
Water treatment, irrigation and pumping stations
Panel retrofits replacing electromechanical control gear

How to specify the right Solid State Relay Ssr

Size the contact rating for the inductive load, not just the resistive current (AC-3 duty for motors)
Check the coil voltage and frequency available in the panel: 24 V DC, 110 V, 230 V or 400 V AC
Confirm the auxiliary contact count needed for the control and indication circuit
Match the enclosure rating to the environment (IP20 inside a panel, IP65 on the machine)

Specifications

Single Phase Solid State Relay DIN Rail Mounted DC Control AC Heat Sink Integrated SSR

Model	CHS- **DA
Load current	10A 25A 40A 60A 80A 100A
Load voltage	24-480VAC
Control voltage	3-32VDC
Control current	10-68mA
On state voltage drop	≤1.8VAC
On state leakage current	≤10mA
Off state time	≤10mS
Dielectric strength	2500VAC
Insulation resistance	1000MΩ500VDC
Ambient temperature	"-25ºC -+75ºC
Mounting method	Din rail type
Indicator	LED
Weight	355g

Frequently asked questions about the Single Phase Solid State Relay DIN Rail

What is the difference between a contactor and a relay?

A contactor is built for switching power circuits repeatedly at high current, often with motor duty ratings (AC-3) and arc-suppressing chambers. A relay switches control signals at low current. In practice: contactor for the motor, relay in the control circuit that drives the contactor coil.

How do I calculate the correct contactor size for a motor?

Use the motor's full-load current, apply the AC-3 rating for the operating voltage, and allow for the number of starts per hour. As a rule of thumb, the contactor's AC-3 rating should be at least equal to the motor FLC, then step up one frame if the duty is heavy.

Do you supply the coil voltage I need?

Coil voltages are specified per order. Send the model number, coil voltage and frequency you require and we will confirm availability and lead time.

Are auxiliary contacts included?

Base models come with the standard auxiliary contact configuration for that frame. Add-on auxiliary blocks and mechanical interlocks can be quoted with the contactor.

Single Phase Solid State Relay DIN Rail