TCMD1000

Overview

The TCMD1000 is a single-channel photodarlington optocoupler manufactured by Vishay Semiconductor Opto Division. It integrates a gallium arsenide infrared-emitting diode with a high-gain photodarlington output transistor, housed in a compact plastic Miniflat package. The device provides an isolation voltage of 3750 Vrms and features a minimum current transfer ratio (CTR) of 600%. Key electrical specifications include a maximum collector-emitter voltage of 35 V, a peak forward current of 60 mA, and a maximum collector current of 80 mA. The unit operates within a temperature range of -40°C to +125°C and exhibits a typical rise time of 300 µs.

Feature Summary

• High gain photodarlington output configuration for enhanced signal amplification
• Robust insulation capability with 3750 Vrms isolation rating
• Compact plastic Miniflat packaging suitable for surface-mount applications

Applications

• Industrial control systems requiring galvanic isolation
• Signal transmission across isolated ground planes
• Power supply feedback loops for voltage regulation

Procurement Notes

Verify the specific ordering suffix to confirm the exact package variant and tape-and-reel quantity, as these details define the physical shipping format. Confirm that the required current transfer ratio meets the design threshold, noting the minimum specification is 600%. Ensure the selected component version complies with RoHS standards if environmental regulations apply to the final assembly.

Selection Notes

Select this component when high gain and moderate speed are required in a small footprint. The 35 V collector-emitter voltage limit dictates suitability for low-voltage logic interfaces rather than high-power switching. Consider the 300 µs rise time when evaluating compatibility with high-frequency digital signals, as it may restrict use in fast data communication protocols.

Part Context

This part belongs to the TCMD10.. series from Vishay, which utilizes gallium arsenide emitters paired with photodarlington detectors. The series is designed for general-purpose isolation tasks where standard phototransistors lack sufficient gain. The Miniflat package offers a space-saving alternative to traditional DIP or SOP formats for dense circuit board layouts.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout compatibility and electrical parameters against existing designs before considering alternative manufacturers.