SFH620A-2X

Overview

The SFH620A-2X is a single-channel optically coupled isolator manufactured by Isocom Components 2004 LTD. It features an AC input configuration utilizing inverse parallel infrared light emitting diodes paired with an NPN silicon phototransistor output. The device provides high isolation capability with a rated insulation voltage of 5300 Vrms and a peak withstand voltage of 7500 Vpk. Key electrical parameters include a collector-emitter saturation voltage of 0.4 V at 10 mA forward current and 2.5 mA collector current. It operates within a temperature range of -55°C to +100°C and is housed in a standard 4-pin DIP package.

Feature Summary

• AC input compatibility via inverse parallel LED structure
• High-voltage galvanic isolation for safety-critical circuits
• NPN phototransistor output for digital switching applications

Applications

• Logic-to-logic isolation in noisy environments
• Line receiver circuits
• Digital control of motors and servo machines
• Computer and peripheral device interfaces

Procurement Notes

Verify the specific suffix designation against official Isocom documentation to confirm exact electrical tolerances and packaging variations. Ensure the component meets required industry certifications such as UL or VDE for the intended application environment. Cross-reference datasheet parameters with system design constraints before finalizing procurement orders.

Selection Notes

Select this component when AC signal input directly drives the isolation barrier without additional rectification circuitry. The inverse parallel LED arrangement allows operation on both positive and negative half-cycles of the input signal. Consider the 5300 Vrms isolation rating for applications requiring robust protection between high-voltage and low-voltage domains.

Part Context

The SFH620A series belongs to Isocom's portfolio of plastic commercial optocouplers, succeeding earlier ceramic military-grade products. This series serves as a replacement for discontinued parts from other manufacturers while maintaining industry-standard pinouts and electrical characteristics. The manufacturing process involves assembly in Malaysia with final testing conducted in the UK facility.

Replacement Considerations

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