SFH619A-X009

Overview

The SFH619A-X009 is a single-channel photodarlington output optocoupler manufactured by Vishay Semiconductor Opto Division. It integrates an infrared LED with a silicon photodarlington sensor in a surface-mount SMD-4 package. Key electrical parameters include a minimum current transfer ratio of 1000% at 1 mA, a maximum collector-emitter voltage of 300 V, and a maximum collector current of 125 mA. The device offers 5000 Vrms isolation voltage, operates within a temperature range of -55°C to +100°C, and features a typical forward voltage of 1.5 V.

Feature Summary

• High current transfer ratio exceeding 1000% for efficient signal transmission at low input currents
• High collector-emitter voltage rating of 300 V suitable for high-voltage switching applications
• Robust insulation capability with 5000 Vrms isolation voltage between input and output circuits

Applications

• Digital logic signal transmission and level shifting
• Power supply control and switching circuits
• Electrical isolation between circuits and systems
• Impedance transformation in electronic interfaces

Procurement Notes

Verify the specific suffix X009T or TO against the required packaging format such as reel or cut tape. Confirm RoHS compliance status through official datasheets. Ensure the manufacturer designation matches Vishay Semiconductor Opto Division to avoid counterfeit components. Cross-reference the part number with authorized distributor catalogs for accurate specification alignment.

Selection Notes

Select this component when high gain is required at low drive currents due to its superior CTR characteristics. The 300 V output voltage rating makes it suitable for industrial applications requiring higher voltage handling than standard 80 V devices. Consider the SMD-4 package for space-constrained PCB layouts. Verify thermal management requirements given the operating temperature range up to 100°C.

Part Context

This device belongs to the SFH619A family of photodarlington optocouplers designed for general-purpose isolation. It utilizes gallium arsenide infrared LEDs paired with silicon sensors. The series is engineered for reliability in digital communication and power control environments where high isolation voltage and fast switching are not the primary constraints compared to high gain.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.