PS7142-2A-A

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Solid State Relays (SSRs) are a type of digital switching device, based on an electrically operated semiconductor, that can be used in a variety of commercial and industrial applications. The PS7142-2A-A is a particularly popular SSR, noted for its simple and reliable operation. This article will discuss the application field of the PS7142-2A-A, as well as its working principle.

The PS7142-2A-A is a zero-crossing type SSR with a nominal operating voltage of 120V AC (50/60 Hz). It is often used for motor control, appliance control, temperature and light control, and other similar applications. It is considered to be highly reliable and can survive for thousands of hours with no maintenance, making it an ideal choice for long-term deployments. It is also tolerant to short pulses across its terminals without damage.

The working principle of the PS7142-2A-A is relatively straightforward. It contains within itself a power semiconductor switch (generally a power MOSFET), a zero-crossing detection circuit, and a driver. The input is then connected to an external power source, and a load is connected to the output. When the circuit is energized, the zero-crossing detection circuit detects when the power voltage reaches 0V, and the driver then turns on the power MOSFET, switching it into the “ON” state and thereby allowing current to flow through the load. When the switch is in the “OFF” state, the power MOSFET effectively blocks the passage of current. This process is repeated 60 times or more per second, enabling steady, reliable control of the load.

In conclusion, the PS7142-2A-A is an extremely versatile SSR, used in a variety of applications in both commercial and industrial settings. It operates on a zero-crossing detection basis, using a power MOSFET to switch the SSR into the “ON” or “OFF” state depending on the voltage of the power source. Its reliable and long-term operation, as well as its tolerance to pulse current, makes it an extremely reliable choice for a variety of applications in both the short- and long-term.

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