TCLT1003

Overview

The TCLT1003 is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It integrates a gallium arsenide infrared-emitting diode optically coupled to an NPN phototransistor within a compact 4-lead SOP package. Key electrical specifications include a maximum collector-emitter voltage of 70 V, a collector current rating of 50 mA, and an isolation voltage of 5000 Vrms. The device exhibits a typical current transfer ratio ranging from 100% to 200%, with a forward voltage of approximately 1.6 V at 60 mA forward current. Operating characteristics feature a rise time of 3 µs and a fall time of 4.7 µs, supporting operation across a temperature range of -55°C to +100°C.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits via optical coupling.
• Features low coupling capacitance suitable for noise-sensitive applications.
• Utilizes a gallium arsenide infrared LED for efficient light emission.
• Offers robust performance with high current transfer ratio consistency.

Applications

• Switchmode power supplies
• General-purpose signal isolation
• Digital communication interfaces

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to ensure correct packaging and tape-and-reel specifications. Confirm that the component status remains active before finalizing procurement plans. Cross-reference the RoHS compliance details with the latest regulatory documentation provided by Vishay. Ensure that storage conditions adhere to the specified moisture sensitivity level to prevent package damage during assembly.

Selection Notes

Select this component when high isolation voltage and fast switching speeds are required in a small surface-mount footprint. Consider the 70 V collector-emitter voltage limit for circuit design margins. Evaluate the 100% to 200% current transfer ratio range to ensure adequate drive capability for downstream logic or load requirements. Verify compatibility with SOP-4 mounting processes and reflow soldering profiles defined in the manufacturing guidelines.

Part Context

The TCLT1003 belongs to the TCLT10 series of optocouplers from Vishay. This series is characterized by extra-low coupling capacitance and high insulation voltage capabilities. The components are designed for reliable operation in environments requiring galvanic isolation. The series utilizes standard semiconductor fabrication techniques to ensure consistent performance across production batches.

Replacement Considerations

Consult Vishay's official substitution guide for verified equivalent part numbers. Ensure any replacement maintains the same SOP-4 package dimensions and pinout configuration. Verify that alternative devices meet or exceed the 5000 Vrms isolation voltage and 70 V collector-emitter voltage ratings. Confirm functional equivalence regarding current transfer ratio and switching times for the specific application.

FAQ

What is the maximum isolation voltage of the TCLT1003?

The TCLT1003 supports an isolation voltage of 5000 Vrms.

What type of output transistor does the TCLT1003 use?

It uses an NPN phototransistor as the output element.

What is the operating temperature range for this component?

The device operates within a temperature range of -55°C to +100°C.