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    Solid state relay, 3 phase, SSR-120DA, 120A 3-32V DC to AC

    Economical 3-phase solid state relay SSR-120DA, load current 120A, DC to AC, 3-32V DC control voltage, 24-480V AC load voltage, excellent quality, high reliability and widely applied in the field of automatic control.
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    Delivery date: 6-12 days

    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

    Basics Model ATO-SYTH12048ZD3
    Size 105х74х33mm
    Weight 500g
    Mounting method Bolted
    Ambient temperature -20℃~75℃
    Humidity ≤95% (non-condensing)
    Technical parameters Control mode DC-AC
    Load voltage 24~480V AC
    Load current 120A
    Control voltage 3~32V DC
    Control current 10-68mA
    On-state voltage drop ≤1.5V AC
    Off-state leakage current ≤10mA
    Off-state time ≤10ms
    Dielectric strength 2500V AC (1min)
    Insulation resistance 500МΩ with 500V DC
    LED indication YES
    Cooling Need fan for cooling or water cooling

    Solid State Relay Dimensions

    3 phase SSR dimensions

    Three Phase SSR Wiring Diagram

    3-phase SSR wiring diagram 3-32VDC

    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.

    1. Resistive load
      The solid state relay (SSR) nominal current should be twice as large as the rated load current.
    2. 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.
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