TCET1105

Overview

The TCET1105 is a single-channel transistor output optoisolator manufactured by Vishay Semiconductor Opto Division. It provides electrical isolation with a rated voltage of 5000Vrms. The device features a DC input and a collector output capable of handling up to 70V and 50mA per channel. Typical forward voltage is 1.39V, with a maximum DC forward current of 60mA. The unit operates within a temperature range of -55°C to 100°C and utilizes a 4-DIP package for through-hole mounting.

Feature Summary

• Provides high-voltage isolation between input and output circuits
• Utilizes a standard transistor output configuration for digital switching
• Designed for robust operation across extended industrial temperature ranges

Applications

• Industrial control system signal isolation
• Microprocessor interface circuits
• Solid-state relay driver applications

Procurement Notes

Verify the specific suffix code against the manufacturer datasheet to confirm pinout compatibility and packaging type. Ensure that the selected variant matches the required isolation voltage rating and thermal performance specifications for the target application environment before finalizing procurement orders.

Selection Notes

Select this component when a 5000Vrms isolation barrier is required in a compact DIP footprint. Consider the 50mA output current limit and 70V collector voltage rating to ensure compatibility with downstream logic or relay loads. Evaluate the CTR specifications relative to the intended drive current requirements.

Part Context

This part belongs to the TCET series of transistor output optocouplers from Vishay. It shares functional similarities with other members of the family but differs in package style and specific electrical characteristics. The 4-DIP form factor distinguishes it from surface-mount alternatives like the TCMT series.

Replacement Considerations

Direct substitutes include the TCMT1105 for surface-mount needs, though package differences exist. Other compatible options within the Vishay portfolio may require verification of pinout alignment and isolation voltage ratings to ensure functional equivalence.