TCED4100

Overview

The TCED4100 is a quad-channel optoisolator manufactured by Vishay Semiconductor Opto Division. It features four independent Darlington transistor outputs driven by infrared LEDs, providing high current transfer efficiency with a minimum CTR of 600% at 1mA input. The device offers robust electrical isolation rated at 5000Vrms between input and output circuits. Key electrical parameters include a maximum collector-emitter voltage of 35V, a typical rise time of 300µs, and a fall time of 250µs. Designed for through-hole mounting in an 8-pin DIP package, it supports DC input signals and delivers high gain suitable for logic interfacing applications requiring significant signal isolation.

Feature Summary

• Quad-channel configuration with four independent Darlington transistor outputs for multi-signal isolation
• High current transfer ratio ensuring efficient signal transmission from LED to phototransistor
• Robust 5000Vrms insulation voltage capability for safe separation of high-voltage domains
• DC input type compatibility allowing straightforward interface with standard logic control circuits

Applications

• Industrial automation control systems requiring isolated signal transmission
• Power supply feedback loops for voltage regulation and monitoring
• Solid-state relay driver circuits for switching AC or DC loads
• Microcontroller interface modules for galvanic isolation of digital inputs

Procurement Notes

Verify the specific manufacturer part number against official Vishay documentation to ensure authenticity. Confirm that the component matches the required 8-pin DIP package and through-hole mounting specifications. Check datasheet revisions for any updates to electrical characteristics or recommended soldering profiles. Ensure compliance with relevant safety standards for isolation voltage ratings before integration into final products.

Selection Notes

Select this component when multiple isolated channels are needed within a single package footprint. Consider the high CTR requirement if driving heavy loads directly without additional amplification. Evaluate the 35V output voltage limit against the application's operating range. The Darlington structure provides high gain but slower switching speeds compared to single-transistor alternatives, influencing suitability for high-frequency applications.

Part Context

This device belongs to Vishay's family of quad-channel optocouplers designed for general-purpose isolation tasks. It shares architectural similarities with other models in the series but distinguishes itself through its specific Darlington output configuration and high current transfer characteristics. The 8-pin DIP form factor allows for easy integration into legacy and modern PCB designs utilizing through-hole technology.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Verify pinout compatibility and electrical parameter equivalence if considering alternative manufacturers. Ensure replacement devices meet the same 5000Vrms isolation rating and Darlington output requirements.