PLA171P

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PLA171P belongs to the category of solid state relays (SSR). These electronic switching devices are used as a substitute for electromechanical relays (EMR) and are characterized by zero arc formation and no noise generation when they open or close a circuit. The PLA171P is part of an SSR family that is designed to provide reliable and robust operation while being highly efficient and cost-effective.

The PLA171P is a one-way heat sink SSR designed with an AC output. It is constructed of a durable plastic and is capable of controlling AC loads up to 25A/250V AC. The PLA171P is also able to provide a continuous output of greater than 40 hours while operating ambient temperatures up to 85°C. It features built-in zero-crossing detector which maximizes actuator life and eliminates arc formation when the relay is opened or closed. The total power consumption of the device when it is operating is less than 0.1W.

The working principle of the PLA171P is based on a built-in metallic hysteresis bimetallic disc. When an AC signal is present on the input side of the relay, the disc moves due to an electro-magnetic force field and the contact of the relay changes its state. When the input signal changes its polarity, the disc returns to its original position, resulting in the transfer of the contact state. This type of relay does not require a manual reset for its operation, which makes it more reliable than other types of relays.

The PLA171P is mainly used for applications involving switching of vibration sensitive loads such as motors, pumps, and compressors. It can be used as a starter, cuter, and protecter for the loads and can also be used as a ratchet timer, flashing circuit, or frequency converter. It is also used in temperature and humidity control systems, measuring and controlling systems, and electronic keys to switch AC loads.

The PLA171P is a reliable and cost-effective solid state relay that is capable of providing continuous operation with low power consumption. Its built-in bimetallic disc ensures stable operation without manual reset and its zero-crossing detector eliminates arc formation when the relay is opened or closed. The PLA171P is mainly used for vibration sensitive loads and can be used as a starter, cutter, and protecter for AC loads.

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