SFH617A-3G

Overview

The SFH617A-3G is a single-channel transistor output optocoupler manufactured by Isocom Components 2004 LTD. It features an NPN silicon phototransistor output and operates within a temperature range of -55°C to +110°C. The device provides electrical isolation with a minimum insulation voltage of 5300 Vrms. Key electrical parameters include a maximum collector-emitter voltage of 70V, a maximum collector current of 50mA, and a forward voltage of 1.65V at 60mA. The current transfer ratio ranges from 100% to 320%, with typical rise and fall times of 4µs and 3µs respectively.

Feature Summary

• Provides galvanic isolation between input and output circuits using infrared LED and NPN phototransistor technology.
• Features low input current requirements for efficient signal transmission across the isolation barrier.
• Designed for through-hole mounting in standard 4-pin DIP packages for reliable PCB integration.

Applications

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

Procurement Notes

Verify that the ordering suffix matches the required package variant, as suffixes typically denote specific tape-and-reel or tube packaging configurations rather than functional changes. Confirm RoHS compliance status directly on the manufacturer's official documentation before procurement. Ensure the supplier source is authorized to guarantee component authenticity and traceability.

Selection Notes

Select this component when a high isolation voltage of 5300 Vrms is required alongside moderate speed performance. The wide operating temperature range supports harsh environments. Compare the current transfer ratio against load requirements to ensure sufficient output drive capability without excessive input current.

Part Context

This part belongs to the SFH617A series of low input current phototransistor optically coupled isolators. The series is designed for applications requiring reliable signal transmission with minimal power consumption on the input side. It serves as a direct equivalent to other industry-standard parts like the VO617A-4, maintaining similar pinout and electrical characteristics.

Replacement Considerations

The SFH617A-3X is a confirmed parametric equivalent to the SFH617A-3G. Both parts are manufactured by Isocom Components 2004 LTD and maintain active product status. Verify that the packaging format difference does not impact assembly processes.

FAQ

What is the maximum collector-emitter voltage rating?

The maximum collector-emitter voltage (Vceo) is rated at 70V.

Does the device support through-hole mounting?

Yes, the SFH617A-3G is available in a 4-pin dual in-line package (DIP) suitable for through-hole installation.