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  • Littlefuse SSAC THD7421A Interval - Delay on Break

    • To ensure accuracy, please note that images may be representative. Refer to the product data sheet for detailed specifications.

    THD7421A

    Manufacturer SSAC / Littelfuse
    Manufacturer Product Number THD7421A

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    Product Description

    Description: Time Delay Relay • Interval - Delay on Break • Input Voltage : 120 VAC • Timing Range; 1 - 100 sec • Mounting ; Surface Mount • Contact Configuration; Solid State - NO • Output Current; 6 Amps • Mode of Operation; Interval (Single Pulse on Operate) / Delay on Break (Release) • Adjustment; External Adjust • Termination; 0.25in. Male Quick Connect Terminals

          Product Information       Resources
    ManufacturerSSAC - Littelfuse
    Product Category Time Delay Relay
    Product Sub Category Interval - Delay on Break
    SeriesTHD7 Series
    		 
      Download Datasheet
          Specifications
    Product Attribute
    		Attribute Value
    Input Voltage 120 VAC
    Timing Range1 - 100 sec
    Mounting Surface Mount
    Contact ConfigurationSolid State - NO
    Output Current6 Amps
    Mode of OperationInterval (Single Pulse on Operate) / Delay on Break (Release)
    AdjustmentExternal Adjust
    Termination0.25in. Male Quick Connect Terminals
          Series Features
    Timer - Interval/Delay-on-Break THD7 Series
    Series Description: The THD7 utilizes only two terminals connected in series with the load. Interval timing mode is achieved by using a small portion of the AC sine wave allowing sufficient voltage for circuit operation. The THD7 can be used for interval or delay-on-break timing. It is designed to operate large loads directly, such as motors, heater elements, and motor starters.
    Operation: (Interval):
    Upon application of input voltage, the output energizes and the time delay begins. The output remains energized throughout the time delay. At the end of the time delay the output de-energizes and remains de-energized until power is removed.
    Reset: Removing input voltage resets the time delay and the output.

    (Delay-on-Break):Reset: Reclosing SW1 resets the timer.
    • Solid-state relay and timer combined
    • Two terminal series connection to load
    • Up to 20A steady state, 200A inrush
    • Fixed or adjustable delays from 1s - 1000m
    • ±0.5% repeat accura

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