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    Solid state relay SSR-80AA, 80A 70-280V AC to AC

    SSR-80AA single phase solid state relay 80 Amp, AC control, zero cross, control voltage70-280V AC, load voltage 24-480V AC, LED indicator, panel mount, excellent quality and economical price.
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    Delivery date: 6-12 days


    80A solid state relay (SSR), 70-280V AC input and 24-480V AC output, features high structural strength, good impact resistance, and strong shock resistance. The SSR offers a reliable switching the 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


    Model ATO-SSR-DH80AA
    Input Control voltage range 70-280V AC
    Max. input current 15mA
    Must operate voltage 70V AC
    Must release voltage 50V AC
    Output Load voltage range 24-480V AC
    Peak voltage 800V AC
    Maximum load current 80A
    Maximum off-state leakage current 2mA
    Maximum off-state time 10mS
    Maximum on-state voltage drop 1.5V
    General Type AC to AC, single phase
    Dimension L – W – H (mm) 57.4х44.8х28
    Weight 135g
    Dielectric strength (input to output) 4000V
    Dielectric strength (input, output to the base) 2500V
    Operating temperature -20℃~ 80℃
    Mount Panel
    Certification CE


    1. When the load is a resistive load, the maximum load current of the selected SSR should be 2~3 times greater than the actual load current;
    2. When the load is an inductive load, the maximum load current of the selected SSR should be more than 7~8 times the actual load current.
    3. When the maximum 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.

    Dimension (Unit: mm)

    Single Phase SSR Dimensions

    Wiring Diagram

    Single Phase AC to AC SSR Wiring Diagram

    Tips: 4 tips for installation and use of solid state relays

    1. In the event of long-term operating current more than 5A, solid state relay must be equipped with a radiator matched, the temperature of whose baseplate shall not exceed 80 ℃ in operation. If the ambient temperature is too high, air cooling must be adopted to accelerate air flow for better heat dissipation.
    2. In order to ensure that the solid state relay contacts closely the surface of the radiator in the process of installation to achieve a better heat dissipation effect, please install the heat-conducting film in parallel between the SSR baseplate and contact surface of the radiator and tighten the fixing screw. Appropriate amount of thermal grease, if any, may be coated evenly on the solid state relay's baseplate and tighten the fixing screw.
    3. In order to prevent breakdown damage to SSRs caused by load short-circuit or over-current, voltage overload, it is recommended to install and use to a special fast acting fuse matched. For inductive load, it is also necessary to install varistors and RC absorption circuits at the solid-state output. For a DC SSR, a freewheeling diode and other protection devices shall be installed if inductive load exists.
    4. Solid state relays work must ensure sufficient operating voltage and current but no more than nominal trigger voltage and current values. For example, the control terminal 3-32V DC means that the minimum input voltage shall not be less than 3VDC, and the maximum shall not exceed 32V DC. Therefore, trigger requirements of SSRs should be met when solid state relays are used in series or parallel.

    Solid state relay (SSR) is simple but widely used in the automation fields. Thus, it is not complex to wire a solid state relay. In this vedio, ATO takes a 40 Amp SSR (DC - AC) for example to show the wiring of a SSR and then switch on/off a motor with this SSR.

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