SFH620A-3

Overview

The SFH620A-3 is a single-channel transistor output optocoupler manufactured by Vishay Semiconductors. It features an NPN phototransistor output and utilizes a DIP-4 through-hole package. The device provides an insulation voltage of 5300 Vrms, ensuring robust signal isolation. Key electrical parameters include a forward current of 60 mA, a forward voltage of 1.65 V, and a collector-emitter saturation voltage of 400 mV. The current transfer ratio ranges from 100% to 320%, with rise and fall times of 2 µs each. Maximum ratings include a collector-emitter voltage of 70 V, a collector current of 100 mA, and power dissipation of 250 mW. Operating temperatures span from -55°C to +100°C.

Feature Summary

• High current transfer ratio for efficient signal transmission at low input currents
• Low coupling capacitance to minimize high-frequency interference
• AC input compatibility for direct connection to alternating current sources

Applications

• Industrial control systems requiring galvanic isolation
• Consumer electronics signal interfacing
• Power supply feedback loops

Procurement Notes

Verify the specific suffix against official Vishay documentation to confirm pinout and packaging variations. Ensure the component meets RoHS compliance requirements for your region. Cross-reference the datasheet revision date to confirm parameter accuracy. Confirm that the DIP-4 package aligns with your PCB footprint constraints. Validate thermal performance within the specified operating temperature range during integration.

Selection Notes

Select this component when AC input compatibility and high CTR are required in a through-hole configuration. Compare against surface-mount alternatives like the SFH6206-3 if space constraints dictate SMD packaging. Consider the 5300 Vrms isolation rating for safety-critical applications. Evaluate the 2 µs switching speed against system timing requirements. Assess the 250 mW power dissipation capability for thermal management in enclosed environments.

Part Context

The SFH620A-3 belongs to the Vishay SFH series of transistor output optocouplers. This series is designed for general-purpose isolation tasks. The part shares core electrical characteristics with other variants in the family but differs in package type and mounting style. It serves as a standard solution for isolating low-power signals between circuits.

Replacement Considerations

The SFH6206-3 is a surface-mount equivalent with identical electrical specifications. Verify pin compatibility before substitution due to package differences.