LTV-357T

Transistor, Photovoltaic Output Optoisolators Overview

The LTV-357T is a single-channel surface-mount optocoupler from Lite-On, featuring a DC input and phototransistor output. It utilizes mini-flat SMD-4 packaging with dimensions of 3.6 mm length, 4.4 mm width, and 2.0 mm height. Key electrical parameters include a maximum collector-emitter voltage of 35V, an output current capacity of 50mA, and a typical forward voltage of 1.2V to 1.4V. The device offers a high isolation voltage of 3750Vrms (with some sources citing 5kVrms) and operates within a temperature range of -55°C to 110°C. Typical switching times are 4μs rise and 3μs fall, with a minimum current transfer ratio of 50%.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• High isolation voltage capability for safe electrical separation between circuits
• Compact mini-flat surface mount package suitable for high-density PCB layouts
• Dual transmission molding technology enhances reliability and environmental resistance
• Certified by major safety agencies including UL, CSA, VDE, and others

Transistor, Photovoltaic Output Optoisolators Applications

• Digital logic signal transmission and level shifting
• Power supply control and switching circuits
• Electrical insulation and impedance transformation between systems

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix (e.g., -C or -V) against the datasheet, as it may indicate variations in packaging tape type or safety certifications such as VDE. Confirm the exact isolation voltage rating required for your application, as sources vary between 3750Vrms and 5kVrms. Ensure the ordering quantity matches the manufacturer's standard reel or tube specifications to avoid handling issues.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a compact, high-isolation transistor output optocoupler is needed for digital interfaces. The 35V output voltage limit suits low-voltage logic systems. Consider the 50mA output current capability for driving moderate loads. Verify that the 4μs/3μs switching speeds meet the system timing requirements compared to faster Darlington alternatives like the LTV-355T if speed is critical.

Transistor, Photovoltaic Output Optoisolators Part Context

Part of the LTV series of miniature optocouplers designed for space-constrained applications. The LTV-357T specifically targets general-purpose isolation where high voltage blocking is required but extreme speed is not the primary constraint. It serves as a bridge between low-power control circuits and higher-power or isolated load sections.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

LTV-355T-C: Offers higher current transfer ratio and faster switching but different package characteristics. LTV-356T-C: Provides higher output voltage (80V) with similar switching speeds. Verify pinout compatibility and thermal dissipation requirements when substituting.