Our Optical MOS Solid State Relay range combines LED‑driven isolation with MOSFET output stages to switch DC loads quickly and quietly. Built on hybrid optoelectronic integration and vertically managed production from components to modules, transceivers, and systems, these relays deliver high isolation, low leakage, and low on‑state resistance. They provide dependable performance for advanced communications, aerospace platforms, and vehicle‑mounted electronics. With patented photo‑MOS technology and stable supply, we focus on precise control paths where low noise and accuracy are important.

How Optical MOS Solid State Relay Works (Opto‑MOSFET / Photo‑MOS)

An internal infrared LED drives a photodiode stage that gates a MOSFET array, creating a galvanic isolation barrier between control and load. This architecture avoids mechanical wear and contact bounce. It also eliminates zero‑cross constraints found in TRIAC types. Compared with TRIAC/thyristor SSRs, a photo‑MOS relay is well suited to DC and low‑frequency switching and offers low Rds(on) with microamp‑level leakage for precise signal and power control.

Core Advantages and Differentiators

Low Rds(on) to reduce power loss and heat in continuous DC switching

Fast turn‑on/turn‑off for responsive, pulse, or multiplexed control

High isolation ratings for safety and EMI robustness

Low off‑state leakage to preserve measurement accuracy and battery life

Long service life with no moving parts and silent operation

These designs benefit from experienced engineering, hybrid optoelectronic integration, and disciplined production. Stable supply supports programs in defense and broadband communication.