Solid state relay, 3 phase, load current 120A, DC control, 3-32V DC input, 24-480V AC output, zero-cross switch, built-in RC, with LED indicator. SSR features optical isolation between input and out circuit, no electric spark, no noise and no contact, high switching speed, high structural strength, impact resistance, anti-vibration.
3 Phase SSR-120DA Specification
|On-state voltage drop
|Off-state leakage current
||2500V AC (1min)
||500МΩ with 500V DC
||Need fan for cooling or water cooling
Solid State Relay Dimensions
Three Phase SSR Wiring Diagram
Tips: How to choose the current of solid state relay (SSRs)?
Taking into account fluctuations in grid voltage and large instantaneous current when load starts, the current of solid state relays (SSRs0 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 SSRs, appropriate margin should be left.
- Resistive load
The solid state relay (SSR) 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.