SFH610A-1

Overview

The SFH610A-1 is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It features an NPN phototransistor output and utilizes a DIP-4 through-hole package. Key electrical parameters include a maximum collector-emitter voltage of 70 V, a maximum collector current of 100 mA, and a forward current of 60 mA. The device offers a high isolation voltage of 5300 Vrms and a typical forward voltage of 1.65 V. Current transfer ratio ranges from 40% to 80%, with rise and fall times of 2 µs and 11 µs respectively. Power dissipation is rated at 150 mW, operating within a temperature range of -55°C to +100°C.

Feature Summary

• Provides high isolation voltage for safe signal transmission between isolated circuits
• Features low coupling capacitance to minimize interference in high-frequency applications
• Delivers high current transfer ratio for efficient signal coupling

Applications

• General purpose signal isolation in industrial control systems
• Interface circuits for microprocessors and logic systems
• Power supply feedback loops requiring galvanic isolation

Procurement Notes

Verify the specific suffix and manufacturer designation when sourcing, as equivalent part numbers such as VO610A-1 may exist with slight parameter variations. Confirm compliance with relevant safety standards including UL1577 and IEC 60950 during procurement. Ensure the DIP-4 package type matches the intended PCB footprint and mounting requirements for reliable integration.

Selection Notes

Select this component based on its 5300 Vrms isolation rating and 100 mA collector current capability. Consider the 40-80% current transfer ratio for driving subsequent stages. The DIP-4 through-hole format suits prototyping and standard board layouts. Evaluate thermal performance given the 150 mW power dissipation limit under expected operating conditions.

Part Context

The SFH610A-1 belongs to the SFH610 series of optocouplers, designed for general-purpose isolation applications. It is functionally related to the VO610A series, often serving as a cross-referenced alternative. The device integrates an infrared emitting diode with an NPN phototransistor in a compact four-pin dual in-line package, suitable for various electronic equipment requiring electrical separation.

Replacement Considerations

The VO610A-1 is listed as a recommended alternative or alias for the SFH610A-1. Verify pinout compatibility and exact electrical specifications before substitution. Other members of the SFH610 family may offer different current transfer ratios or packaging options.