LTV-355T-D

Transistor, Photovoltaic Output Optoisolators Overview

The LTV-355T-D is a single-channel optocoupler featuring a GaAs infrared LED coupled to a Darlington phototransistor output, housed in a surface-mount SMD-4 package. It provides an isolation voltage of 3750 Vrms and supports a maximum forward current of 50 mA with a typical forward voltage of 1.2 V. The device delivers a high minimum current transfer ratio of 600% at IF=1mA and VCE=2V, ensuring robust signal transmission. Key switching parameters include a rise time of 60 µs and a fall time of 53 µs. It operates within a temperature range of -55°C to 100°C and dissipates up to 170 mW.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• High current transfer ratio for efficient signal coupling
• Darlington output configuration for high gain
• Surface-mount design for automated assembly

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial control systems requiring galvanic isolation
• Power supply feedback loops
• Solid-state relay driver circuits

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix 'D' against the manufacturer's official datasheet to confirm if it denotes a distinct tape-and-reel packaging specification or a variant with adjusted electrical tolerances compared to the standard LTV-355T. Ensure the component matches the required isolation voltage ratings and thermal dissipation capabilities for the target application environment before finalizing procurement.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high current transfer efficiency is critical for driving subsequent stages with minimal input current. The Darlington output structure offers higher gain than standard transistor outputs but exhibits slower switching speeds. Evaluate the trade-off between the 600% CTR benefit and the microsecond-level response times against system timing requirements.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the Lite-On LTV series of optocouplers, designed for general-purpose isolation applications. The LTV-355T-D variant specifically utilizes a Darlington output stage, distinguishing it from models with single-transistor outputs. It serves as a bridge between low-voltage control logic and higher-voltage power circuits while maintaining electrical safety standards.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct substitutes include the LTV-355T and LTV-357T, provided the packaging and pinout compatibility are verified. Cross-reference the current transfer ratio and isolation voltage specifications to ensure equivalent performance in the existing circuit design.