Three phase solid state relays
Home Products Solid State Relays (AC Switching)Three phase solid state relays
Discover premium three phase solid state relays for industrial automation, motor control, renewable energy, and HVAC applications. Our SSRs provide fast switching, long lifespan, and silent operation, perfect for high-power three-phase loads (380V–480V AC). Designed for reliability, they excel in controlling industrial motors, solar inverters, and heavy machinery. As a leading Chinese supplier, we offer cost-effective alternatives to brands like Crydom, Omron, and Carlo Gavazzi. Enhance your systems with our durable three phase SSRs, backed by expert support.
3 phase motor reversing solid state relays
10A to 150A 660VAC
10A 25A 40A 3 phase Solid State Relay
10A, 15A, 25A, 40A SSR, 3 phase, trics output, economical type.
3 phase solid state relay 40A 60A 80A 100A 120A
Solid state switching contactor, SCR output, 40A, 60A, 80A, 100A, 120A SSR, 3 phase SSR relays.
200A 300A 400A 500A Three phase solid state relays
200A, 300A, 400A and 500A 3 phase SSR, 24-440VAC 48-660Vac output, DC to AC, AC to AC.
400A 500A three phase solid state relay
400A and 500A integrated solid state relays, three phase, panel mount
Compact din rail mount three phase solid state relay
10A to 40A, 24-380VAC output
Solid state soft starter module
Soft starter modules for single phase and three phase motor.
A margin should be left when selecting the voltage and current of the solid state relay.
For resistive load: the current is selected according to 2.5~4 times the load current, and the voltage is selected according to 2~2.5 times the load power. Inductive load: current is selected according to 3-7 times load current, voltage is selected according to 2.5-3 times load voltage.
According to the relationship between load current and ambient temperature, when the ambient temperature is high or heat dissipation conditions are not good, the current capacity of the solid state relay should be increased accordingly.
In order to prevent the product from short-circuiting during use, it is necessary to connect a fast circuit breaker or a fast fuse in series with the product in the load circuit.
For inductive loads, a freewheeling diode must be connected to both ends of the load, and a varistor must be connected to the output end (the varistor (MOV) is selected according to 1~1.5 times of the power supply voltage) to prevent the high voltage generated during switching from damaging the solid-state switch.
When the product is installed, it is required that the contact surface between the heatsink and the product must be flat and clean, and a layer of thermally conductive silicone grease is applied to its surface, and then finally the screws set with flat washers and Spring washersare tightened symmetrically to fix.
Three-Phase Solid State Relay (SSR) is a contactless electronic switching device used to control the on/off operation of three-phase AC loads. It utilizes semiconductor components (such as thyristors, MOSFETs, etc.) as switching elements, enabling the control of high-voltage, high-current three-phase AC circuits through low-voltage DC of 4-32V or AC of 90-280V signals.
Three-phase solid-state relays offer significant advantages such as being contactless, fast response, long lifespan, and strong anti-interference capabilities, making them particularly suitable for industrial motor control, electric heating systems, automation equipment, and other applications that require frequent, reliable switching and resilience in harsh environments.
The Motor Forward and Reverse Solid State Relay is a contactless electronic switching device specifically designed to control the forward and reverse operation of three-phase AC motors. It utilizes two internally reverse-parallel thyristor or MOSFET sets to switch the motor phase sequence, thereby controlling the motor's forward and reverse rotation. Compared to traditional mechanical contactor-based solutions, it eliminates arcing, noise, and mechanical wear, offering higher reliability, faster response times, and longer service life.
