SFH640-2

Overview

The SFH640-2 is a transistor output optocoupler featuring an NPN phototransistor detector with base connection. It provides 5300 Vrms isolation voltage in a 6-DIP package. Key electrical parameters include a maximum collector-emitter voltage of 300 V, a maximum collector current of 50 mA, and a forward current of 60 mA. The device operates within a temperature range of -55°C to +115°C.

Feature Summary

• Integrates a GaAs infrared emitting diode optically coupled to a silicon planar phototransistor detector.
• Includes a base connection on the phototransistor for enhanced switching speed control.

Applications

• Industrial automation signal isolation
• Power supply feedback loops
• Microprocessor system interface circuits

Procurement Notes

Verify component authenticity through authorized Vishay distributors or certified suppliers. Confirm RoHS compliance status and specific ordering suffixes against official datasheets. Ensure storage conditions meet semiconductor handling standards to maintain performance integrity prior to assembly.

Selection Notes

Select this component when high isolation voltage and fast switching are required. The base connection allows for external resistor adjustment to optimize response time. Verify that the 300 V collector-emitter rating meets circuit requirements. Consider thermal dissipation limits within the specified operating temperature range.

Part Context

Part of the SFH640 series from Vishay Semiconductor Opto Division. This family includes variants with different packaging options such as SMD-6. The series utilizes standard GaAs LED and silicon phototransistor technology for reliable optical transmission in compact forms.

Replacement Considerations

Consult official Vishay documentation for direct substitutes. Cross-reference pinouts and electrical ratings before substitution. No alternative part numbers are confirmed in available public data.