TLP781(D4-Y-LF6,F)

Transistor, Photovoltaic Output Optoisolators Overview

The TLP781(D4-Y-LF6,F) is a single-channel transistor output optocoupler manufactured by Toshiba Semiconductor and Storage. It integrates a gallium arsenide infrared emitting diode with a silicon NPN phototransistor in a four-lead plastic DIP package. The device provides high isolation voltage of 5000 Vrms minimum between input and output circuits. Key electrical parameters include a collector-emitter breakdown voltage of 80V minimum, a forward current of 25mA maximum, and a dark current of 100nA maximum. The typical current transfer ratio ranges from 50% to 600%, ensuring reliable signal transmission across different voltage domains.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Optical coupling via GaAs IRED and silicon NPN phototransistor for galvanic isolation
• High insulation voltage capability of 5000 Vrms minimum between terminals
• Standardized current transfer ratio range supporting diverse logic interface requirements
• Robust collector-emitter breakdown voltage suitable for various controller applications

Transistor, Photovoltaic Output Optoisolators Applications

• Office equipment signal transmission
• Household appliance control interfaces
• Solid state relay driver circuits
• Switching power supply feedback loops
• Voltage level shifting between disparate circuit domains

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix 'D4-Y-LF6' against official Toshiba documentation to confirm pinout configuration and lead finish specifications. Ensure the selected variant matches the required packaging format and compliance standards for the target assembly process. Cross-reference the manufacturer's latest datasheet to validate that the component meets all necessary safety certifications for the intended end-use environment.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high isolation voltage and moderate speed are required for DC or low-frequency signal transmission. Consider the 80V collector-emitter rating and the specific CTR range to ensure compatibility with the load circuit requirements. Evaluate the DIP4 package dimensions against available PCB space constraints. Confirm that the operating temperature range aligns with the environmental conditions of the final application system.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the TLP781 series of photocouplers designed for general-purpose isolation tasks. The series utilizes a standard DIP4 footprint, facilitating easy integration into existing through-hole designs. It serves as a fundamental building block for creating isolated interfaces in industrial and consumer electronics, bridging low-voltage control logic with higher-voltage power stages safely.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct substitutes may include other Toshiba TLP781 variants with different suffixes indicating package or ranking differences. Verify equivalent electrical characteristics such as CTR, isolation voltage, and pin configuration before substitution. Consult the manufacturer's cross-reference list for approved alternative part numbers that maintain functional parity.