PS7801K-1A-A Relays

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Solid State Relays (SSRs) are electronic devices used to switch electrical circuits on and off and provide a reliable and cost-effective method for controlling and monitoring electrical processes. PS7801K-1A-A SSR is designed to provide on/off control of alternating current (AC) and direct current (DC) loads utilizing a low-level voltage input. The PS7801K-1A-A offers numerous advantages over electro-mechanical relays, such as lower cost, smaller size, and higher reliability.

Application field

The PS7801K-1A-A is ideal for applications such as motor control, thermal overload protection, motor starter and drive control, furnace control, process line control, stage lighting control, and machine tool control. It offers maximum load current capability of 12A, and contact rating up to 5A. It is designed to control resistive, inductive, and bidirectional loads such as solenoids, AC/DC motors, and lamps.

Working principle

The PS7801K-1A-A is a zero-crossing, AC/DC relay. It works on the principle of a thyristor connected in series with the load. The thyristor, in turn, is triggered on and off by a control circuit based on the input voltage. When the input voltage is low, the thyristor is off and the load remains off. When the input voltage reaches a pre-determined threshold, the thyristor is triggered, allowing the load to be energized. When the input voltage is low, the thyristor is turned off and the load is de-energized.

The PS7801K-1A-A also incorporates a number of other features, such as a built-in surge suppressor to minimize transient voltage spikes and a voltage limiting transformer to protect against short-circuit current. It also includes a surge absorber that limits the output current in the event of a fault. This feature ensures that the load remains protected from overcurrent conditions.

The PS7801K-1A-A also offers a number of safety features, such as an overcurrent protection circuit and a short-circuit protection circuit. These features help reduce the chances of accidental damage to the load. Furthermore, its isolated input/output design helps to minimize electrical noise and ensure smooth operation of the load.

The PS7801K-1A-A is an efficient and reliable solid state device that offers high-performance switching and control of AC/DC loads. Its compact size, low cost, and high reliability make it the ideal choice for a wide range of applications.

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