120A 3-32V DC to 24-480V AC 3-phase solid state relay (SSR) features compact size, high structural strength, good impact resistance, and strong shock resistance. The SSR relay offers a reliable switching commercial and industrial loads, such as computer peripheral interface device, printing machine, molding machine, food machine, packaging machine, and so on.
- Built in RC absorption
- Photoelectric isolation
- SCR output
- LED indicator for operation status
- Removable protective cover for safety
- Panel mount
- Zero-crossing switch type
||Control voltage range
|Max. input current
|Must operate voltage
|Must release voltage
||Load voltage range
|Maximum off-state leakage current
|Maximum off-state time
|Maximum on-state voltage drop
||DC to AC, 3 phase
|Dimension L – W – H (mm)
|Dielectric strength (input to output)
|Dielectric strength (input, output to the base)
When the load current is higher than 10A, a heat sink must be installed to the solid state relay, or the SSR relay should be mounted on a metal base plate with heat dissipation effect, and the thermal grease is applied between them.
When the load current is 40A or more, a fan cooling radiator or water cooling radiator must be equipped.
||Heat sink for 3 phase SSR
||Mounting Hole Diameter: 3mm
Groove Distance: 84mm
||≤150A 3 phase solid state relay
Dimensions (Unit: mm)
Tips: How to choose the current of solid state relay?
Taking into account the fluctuations in grid voltage and large instantaneous current when the load starts, the current of solid state relays (SSR) is generally several times larger than its rated current, and thyristor chip’s resistance to current impact is poor, it is recommended in the selection of the current of SSR, appropriate margin should be left.
- Resistive load
The SSR relay nominal current should be twice as large as the rated load current.
- Inductive load
The nominal current should be 2.5 times as large as the rated current of the load for light load; 3 times for middle-sized load; and 4 ~ 4.5 times for heavy load.