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    Industrial Solid State Relay 150A/200A/250A/300A DC-AC SSR

    5 out of 5 based on 2 reviews | Write a review
    Reliable industrial single phase solid state relay has optional load current 150A/ 200A/ 250A/ 300A to suit different automatic control requirements. DC to AC SSR can drive high current 24-440V AC with low control voltage 3-32V DC, safe and fast switching, high-strength structure, compact size and favorable price.
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    Delivery date: 6-12 days

    Industrial solid state relay can be selected in the load current range of 150 Amp, 200 Amp, 250 Amp and 300 Amp. This single phase SSR is DC control AC type, applicable for petrochemical equipment, pharmaceutical machines, food machines, packaging machines, plastic machines, CNC machine tool and other automatic control systems.


    Control Voltage 3-32VDC
    Control Current DC 7-32mA
    Load Current 150A 200A 250A 300A
    Load Voltage 24-440V AC
    On-State Voltage Drop ≤1.5V
    Off-State Leakage Current ≤4mA
    Off-State Time ≤10mS
    Dielectric Strength 2500V AC
    Insulation Resistance 1000MΩ/ 500V DC
    Ambient Temperature -20 ~ +70℃
    Mounting Method Bolt Fixing
    Working Indicator LED
    Weight 230g
    Dimension (L*W*H) 94*34*42mm
    Heat Sink (Optional) More info., please click here.

    Dimension (Unit: mm)

    150A - 300A Industrial Solid State Relay Dimension

    Wiring Diagram

    industrial Solid State Relay SSR-200DA Wiring Diagram

    Operation Note

    1. For the resistive load, it can not exceed 60% of the rated current of the SSR.
    2. For the inductive or capacitive load, it can not exceed 40% of the rated current of the SSR.
    3. For the electric motor, it can not exceed 20% of the rated current of the SSR.
    4. Proper radiator or heat sink should be equipped for the industrial solid state relay. If the load cooling condition is not good, it is necessary to leave some margin. Avoid the load short circuit because over current and short circuit are the main causes for permanent damage of the internal SCR of the SSR.
    5. Over current protection: Using fast fuse and air switch is one of the methods for over current protection; fuse is also available for small capacity.
    6. Over voltage protection: It can adopt the parallel voltage-dependent resistor (MOV). The MOV area decides the absorption power, and its thickness decides the protective voltage value. Generally, 471/10D voltage-dependent resistor is suitable for 220V series SSR, 681/10D voltage-dependent resistor for 380V series SSR, and 821/10D voltage-dependent resistor for 480V series SSR.

    Tips: Usage of Solid State Relay – Inductive Load

    Although AC solid state relay is cut off at zero current, there will be still some problems due to other causes. On the moment of zero current, the SSR will changeover (reverse current direction) at which the SSR does not conduct the current. All the transient line voltage is bridged over on the connection terminal, which produce a high dv/dt to make the SSR breakover at once, so as to have the SSR “lock up” state without release. Most of AC SSR has RC to enhance the capability against dv/dt. For DC inductive load, there will be high back EMF when it starts up. It can add the freewheeling diode in the two ends of load to make the DC solid state relay work reliable.

    Existing reviews of Industrial Solid State Relay 150A/200A/250A/300A DC-AC SSR
    Can I use your 300 amp SSR as a starter relay on a 12 VDC automotive application?
    Can I use your 300 amp SSR as a starter relay on a 12 VDC automotive application?
    From: Nischal | Date: 13/12/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    What is your 12 VDC automotive application, and how will you use SSR for? Please, describe more.
    >>>If SSR is used as a starting relay, then its rated current should be 5-6 times your load rated current.
    Configuration of 200A industrial solid state relay
    Could you configure your 200A solid state relay to be with fan, and heat sink?
    From: Mullikin | Date: 04/08/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, of course. The SSR heat sink & fan can be selected at the drop-down list, and for more info. of heat sink, please check the list:
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