The LH1520 dual 1 form A relays are SPST normally open switches that can replace electromechanical relays in many applications. They are constructed using a GaAIAs LED for actuation control and an integrated monolithic die for the switch output. The die, fabricated in a high-voltage dielectrically isolated technology is comprised of a photodiode array, switch control circuitry, and MOSFET switches. In addition, the LH1520 SSRs employ current limiting circuitry, enabling them to pass FCC 68.302 and other regulatory surge requirements when overvoltage protection is provided.
The LH1520 series are dual 1‑form‑A solid‑state relays (SPST, normally open) that use a GaAs LED for actuation and a monolithic MOSFET output stage. They include current‑limit circuitry, provide 5300 V RMS isolation, and feature low on‑resistance (≈20 Ω) with a continuous load voltage of 350 V and load current of 150 mA.
Typical applications include telecom switching, instrumentation, and industrial control. The device complies with RoHS and WEEE directives, and the datasheet lists absolute maximum ratings, electrical characteristics, typical performance curves, and package dimensions for both DIP‑8 and SMD‑8 versions.
| Isolation test voltage | 5300 V RMS |
|---|---|
| Typical on‑resistance (R_ON) | 20 Ω |
| Load voltage rating | 350 V |
| Load current rating | 150 mA |
| Continuous DC load current (one pole) | 150 mA |
| Ambient temperature range | -40 °C to +85 °C |
| Storage temperature range | -40 °C to +150 °C |
The relay provides an isolation test voltage of 5300 V RMS.
The typical on‑resistance is 20 Ω.
The device operates from –40 °C to +85 °C and can be stored from –40 °C to +150 °C.
The relay is rated for a load voltage of 350 V and a load current of 150 mA.