LH1546AD

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Solid State Relays (SSRs) are electronic relays that use solid-state components to perform the switching function. They are typically used to switch on/off electrical loads from a digital logic system without the need for physical contact between system and loads. They provide many advantages over traditional electromechanical relays such as higher switching speeds, increased flexibility, improved reliability and increased efficiency. The LH1546AD is a member of the LH15xx family of SSRs which are designed to provide reliable, IEC-certified operation.

The LH1546AD is a single-phase Zero-Crossing SSR which utilizes a Triac to provide the switching function. The device is designed to operate with AC input voltage from 0V to 240V and can handle up to 10A of current. The switch time is fast enough for controlling resistive, inductive and some capacitive loads, and has a maximum repeatable time of 100 ms. The device is suitable for applications such as motor control, AC line dimming, heating control, and general on/off control.

The working principle behind the LH1546AD SSR follows the same basic concept as other SSRs. The device contains an optically isolated input which is used to control the switch. When the input is activated, current is transferred through the optical isolator which creates a high voltage across the input terminals, activating the internal SCRs inside the SSR. This, in turn, switches the internal Triac On/Off.

The LH1546AD also incorporates a patented Zero-Crossing (ZC) technology. This technology ensures that the Triac is switched on at the zero crossing point of the input AC supply to prevent possible transients and interference. This feature is particularly useful for devices operating in harsh environments such as motors and other inductive loads.

In summary, the LH1546AD is a single-phase Zero-Crossing SSR which provides reliable, IEC-certified operation. It utilizes a Triac to provide the switching function with AC input voltage from 0V to 240V and can handle up to 10A of current. The device is suitable for applications such as motor control, AC line dimming, heating control, and general on/off control. Its Zero-Crossing technology ensures that the Triac is switched on at the zero crossing point of the input AC supply to prevent possible transients and interference.

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