TLP127(S410,F)

Overview

The TLP127(S410,F) is a mini flat coupler optoisolator designed for surface mount assembly. It integrates a gallium arsenide infrared emitting diode with a Darlington phototransistor featuring an integrated base-emitter resistor. The device provides high-voltage isolation of 2500Vrms between input and output channels. Key electrical parameters include a collector-emitter voltage (VCEO) of 300V, a forward current of 50mA, and a collector output current of 150mA. Typical switching times are 40µs rise and 15µs fall at specified test conditions. The component operates within a temperature range of -55°C to +100°C and features low leakage current in the nanoampere range.

Feature Summary

• Integrates a Darlington phototransistor with an internal base-emitter resistor for simplified circuit design
• Provides robust high-voltage isolation suitable for demanding industrial environments
• Features ultra-low capacitance and minimal leakage current for signal integrity
• Complies with IEC 61000-4-2 electrostatic discharge standards for enhanced reliability

Applications

• Programmable logic controllers
• DC-output modules
• Telecommunications equipment

Procurement Notes

Verify the specific suffix designation against official Toshiba documentation to confirm pinout compatibility and package variations. Ensure that the selected variant meets the required isolation voltage ratings for the target application. Confirm RoHS compliance status if environmental regulations apply. Cross-reference datasheet revisions to ensure parameter consistency with existing designs.

Selection Notes

Select this component when high current transfer ratio is required without external base drive resistors. The integrated Darlington structure offers higher gain compared to standard phototransistors. Consider the slower switching speed inherent to Darlington outputs when designing for high-frequency applications. Verify thermal dissipation requirements based on the maximum power rating and ambient operating conditions.

Part Context

This part belongs to Toshiba's mini flat coupler series, which focuses on compact surface-mount solutions. The TLP127 series utilizes a small outline package to reduce PCB footprint while maintaining necessary isolation barriers. These devices are engineered for general-purpose isolation tasks where space constraints and cost-effectiveness are primary design drivers.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.