Vishay Single Channel Solid State Relay 4-Pin Surface Mount SMD Optocoupler LH1546ADF

Vishay LH1546ADF is a high-performance single channel solid state relay optocoupler with a 4-pin surface mount device (SMD) package. It integrates optoelectronic technology using a gallium aluminium arsenide (GaAlAs) LED as the input actuator and MOSFET switches for the output. This structure replaces conventional electromechanical relays in various applications, delivering silent switching and enhanced longevity.

The device features a Single Pole Single Throw (SPST) normally open configuration, suitable for many relay replacement scenarios. Its current-limiting circuitry provides robust protection against overvoltage, improving reliability during electrical surges.

Designed for industrial and commercial use, the LH1546ADF provides a maximum forward voltage of 1.45 V and can handle a maximum input current of 50 mA. The isolation test voltage rating of 5300 VRMS allows safe operation in high-voltage environments while ensuring safe electrical isolation between input and output sections.

The device's fast switching times, with a typical rise time of 0.13 ms and a fall time of 0.05 ms, make it suitable for rapid signal switching scenarios. Its operating temperature range from -40°C to 85°C enables it to perform reliably in harsh environmental conditions typically found in telecommunications, metering systems, and security equipment.

Single channel solid state relay in a compact 4-pin surface mount SMD package. SPST normally open switch suitable for relay replacement applications. GaAlAs LED actuator with MOSFET output for efficient switching. Current limiting and overvoltage protection built-in for enhanced reliability.

High isolation voltage rating of 5300 VRMS for electrical safety. Compliance with UL1577 safety standards. Fast switching with typical rise and fall times of 0.13 ms and 0.05 ms. Wide operating temperature range from -40°C to +85°C.

Applications include general telecom switching, metering, and security equipment.

This Vishay optocoupler, model LH1546ADF, is manufactured in Malaysia with strict quality controls and is ideal for use in electronic and electrical systems requiring reliable signal isolation and relay switching capabilities. It is part of Vishay's LH1546 series of solid state relay devices.

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