Littelfuse announces the release of the CPC1343G OptoMOS Solid-State Relay (SSR), a compact Form-A (1-A) OptoMOS relay designed for high-reliability switching in demanding industrial, medical, and instrumentation applications.
Overview
The CPC1343G leverages Littelfuses proven OptoMOS technology to deliver 900mA continuous load current, 60V blocking voltage, and enhanced 5000VRMS input-to-output isolation—all within a space-saving 4-pin package. Fast switching performance (4ms turn-on, 1ms turn-off) enables precise control in modern electronic systems, while the low 3mA maximum LED drive current ensures compatibility with TTL and CMOS logic without additional interface circuits.
Built for harsh environments, the CPC1343G supports an extended ambient temperature range of -40°C to +105°C, exceeding the +85°C limit common in many competing SSRs. Its solid-state construction eliminates mechanical wear, providing quiet, maintenance-free operation and long-term reliability that electromechanical relays cannot match.
Optimized for Safety, Efficiency, and Space-Constrained Designs
The CPC1343G features a maximum on-resistance of just 0.8Ω, minimizing power dissipation and improving thermal performance under higher load currents. Available in both through-hole DIP-4 and surface-mount configurations, it simplifies PCB layout and enables flexible manufacturing across industrial and medical platforms.
“With the introduction of the CPC1343G, were providing customers with a high-performance solid-state relay that combines enhanced isolation, fast switching, and extended temperature capabilities,” 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 series includes multiple package options optimized for different assembly and volume requirements:
- DIP-4 – Through-hole
- SMT – Surface-mount
- Tape & Reel – Automated high-volume production
Target Markets and Applications
The CPC1343G is ideal for applications requiring high isolation, fast response, and reliable operation at elevated temperatures:
- Industrial control systems and automation
- Medical equipment requiring patient-device isolation
- Instrumentation, data acquisition, and multiplexing
- Automatic Test Equipment (ATE)
- Utility and smart metering systems
By combining high load current capability, enhanced isolation, and a compact footprint, the CPC1343G extends the Littelfuse OptoMOS product portfolio and provides designers with a compliant switching solution for next-generation electronic systems.
FAQ: Learn More About These High-Current OptoMOS Solid-State Relays
1. How does the CPC1343G differ from traditional electromechanical relays?
Unlike electromechanical relays, the CPC1343G has no moving parts, enabling silent, maintenance-free operation at high temperatures with faster switching speeds, higher isolation, and improved reliability.
2. How does the CPC1343G compare to similar solid-state relays?
It offers higher continuous load current (900mA vs. ~550mA), lower on-resistance (0.8Ω vs. ~2.5Ω), and operates at temperatures up to +105°C, delivering better thermal performance and energy efficiency.
3. Is the CPC1343G compatible with low-power control logic?
Yes. The device requires only 3mA maximum LED drive current, making it fully compatible with TTL and CMOS logic without additional drivers.
4. Which applications benefit most from the CPC1343Gs enhanced isolation?
The 5000VRMS reinforced isolation supports strict safety and regulatory requirements, benefiting medical devices, industrial controls, instrumentation, and metering applications.
5. What package options are available?
The CPC1343G is available in through-hole DIP-4 and surface-mount packages, including tape-and-reel options for automated high-volume production.
Availability
The CPC1343G series is now available for ordering through Littelfuse authorized distributors.
