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    Solid state relay, 3 phase, SSR-40DA, 40A 3-32V DC to AC

    5 out of 5 based on 1 reviews | Write a review
    Low price 40 Amp solid state relay, 3 phase SSR-40DA, DC control, input voltage 3-32V DC, AC load voltage 24-480V AC, quality SSR suitable for automatic control applications.
    Free shipping
    Delivery date: 6-12 days

    Solid State Relay, 3 phase, load current 40A, DC to AC, zero-cross switch, built-in RC, LED indicator. SSR features optical isolation, no electric spark, no noise, no contact, high switching speed, high reliability, long lifespan, wide applications.

    3 Phase SSR-40DA Specification

    Basics Model ATO-SYTH4048ZD3
    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 40A
    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: Thermal design and radiator selection of solid state relay

    There is certain internal power dissipation in solid state relays’ operation. The dissipation value is mainly determined by product of output voltage drop and load current, embodied in the form of heat radiation. The quality of heat dissipation directly affects maximum load current of solid state relays and maximum allowable temperature of the working environment and it is one of the important factors that affect the reliable operation of SSRs. Therefore, we should pay attention to thermal design and radiator selection so that SSRs may work reliably and failure of and damages caused by poor heat dissipation to solid state relays can be avoided.

    In general, solid state relays, whose output current is less than 5A, use natural convection air enough to achieve the purpose of cooling, but when installed, solid state relays need a good convection environment and the space between each solid state relay should not be less than the width of a SSR. It is essential for those solid state relays with a load current greater than 10 A to use suitable radiators, even forced air cooling (air speed at 6 m/s) or water-cooling if necessary. The good heat dissipation condition is very important for SSRs’ reliable work.

    Existing reviews of Solid state relay, 3 phase, SSR-40DA, 40A 3-32V DC to AC
    So far the SSR works great and no problems.
    I use this unit to switch a water pump on/off. The solid state relay indeed got hot while running without a heat sink. Then added a heat sink to make it running longer and safer. So far works great and no problems.
    From: Gabriel | Date: 03/01/2019
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