TCDT1123

Overview

The TCDT1123 is a single-channel transistor-output optoisolator manufactured by Vishay Semiconductor Opto Division. It integrates a gallium arsenide infrared emitting diode optically coupled to a phototransistor within a 6-lead plastic dual inline package (DIP). The device provides electrical isolation with a rated insulation voltage of 5000 Vrms. Key electrical parameters include a collector-emitter saturation voltage and defined current transfer ratio characteristics suitable for signal transmission applications.

Feature Summary

• Integrates a gallium arsenide infrared emitter with a phototransistor for optical coupling
• Provides high-voltage electrical isolation between input and output circuits
• Utilizes a standard 6-lead plastic dual inline package for through-hole mounting

Applications

• Signal isolation in industrial control systems
• Interface circuits for logic-to-power level translation
• Switching applications requiring galvanic isolation

Procurement Notes

Verify the specific ordering suffix, such as 'G' for RoHS compliance, against the required environmental standards. Confirm the package type matches the PCB footprint requirements. Check manufacturer documentation for lead-free plating specifications and storage conditions prior to assembly to ensure component integrity during soldering processes.

Selection Notes

Select this component when a single channel of transistor output isolation is required. Ensure the circuit design accommodates the specific current transfer ratio and saturation voltage limits. Verify that the 5000 Vrms isolation rating meets the safety requirements of the application environment compared to lower-rated alternatives.

Part Context

This part belongs to the TCDT1120 series, which includes variants like the TCDT1120 and TCDT1123. These devices share the same basic architecture of an infrared LED coupled to a phototransistor in a 6-DIP package. The series is designed for general-purpose isolation tasks where moderate speed and high voltage isolation are necessary.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Designers should consult official Vishay documentation or authorized distributors for qualified equivalents that match the pinout, isolation voltage, and package dimensions.