New 60 V, 900 mA normally open SSR delivers 5,000 VRMS reinforced isolation and reliable operation up to +105 °C in compact DIP-4 and SMD packages
Littelfuse, Inc. (NASDAQ: LFUS), an industrial technology manufacturing company shaping solutions for the safe and efficient transfer of electrical energy, today announced the launch of the CPC1343G OptoMOS® Solid-State Relay, a compact, normally open (1-Form-A) OptoMOS relay designed for high-reliability switching in demanding industrial, medical, and instrumentation applications. (View the video.)
Built on Littelfuse OptoMOS technology, the CPC1343G combines 900 mA continuous load current, 60 V blocking voltage, and reinforced 5,000 VRMS input-to-output isolation designed to meet stringent safety and compliance requirements in a space-saving 4-pin package. Fast switching performance—4 ms turn-on and 1 ms turn-off—enables precise control in modern electronic systems, while a low 3 mA maximum LED drive current ensures compatibility with TTL and CMOS logic without added interface circuitry.
Designed for harsh operating environments, the CPC1343G supports an extended ambient temperature range of –40 °C to +105 °C, exceeding the +85 °C limit common to many competing SSRs. Its solid-state construction eliminates mechanical wear, delivering silent, maintenance-free operation and long-term reliability where electromechanical relays often fall short.
Optimized for Safety, Efficiency, and Space-Constrained Designs
With a maximum on-resistance of 0.8 Ω, the CPC1343G minimizes power dissipation and improves thermal performance at higher load currents. The device is offered in both through-hole DIP-4 and surface-mount configurations, simplifying PCB layout and enabling flexible manufacturing options across industrial and medical platforms.
“With the launch of the CPC1343G, we’re giving our customers a high-performance solid-state relay that combines reinforced isolation, fast switching, and extended temperature capability,” said Dr. Hugo Guzman, Product Marketing Manager at Littelfuse. “This solution addresses critical reliability and safety challenges in space-constrained designs, helping engineers reduce maintenance, improve system robustness, and accelerate time to market.”
Package and Ordering Options
The CPC1343G family includes multiple package options optimized for different assembly and volume requirements:
Target Markets and Applications
The CPC1343G is ideally suited for applications requiring high isolation, fast response, and reliable operation at elevated temperatures, including:
- Industrial control systems and automation
- Medical equipment requiring patient-to-equipment isolation
- Instrumentation, data acquisition, and multiplexing
- Automatic test equipment (ATE)
- Utility and smart metering systems
By combining high-load-current capability, reinforced isolation, and compact packaging, the CPC1343G expands the Littelfuse OptoMOS portfolio and provides designers with a compliance-ready switching solution for next-generation electronic systems.
