SFH617A-2

Overview

The SFH617A-2 is a single-channel transistor output optocoupler manufactured by Vishay Semiconductors and distributed by Isocom Components. It features an NPN phototransistor output housed in a PDIP-4 package. Key electrical parameters include a maximum collector-emitter voltage of 70 V, a peak forward current of 60 mA, and a typical forward voltage of 1.65 V. The device provides an insulation voltage of 5300 Vrms with a current transfer ratio ranging from 63% to 125%. Operating temperatures span from -55°C to +110°C, with rise and fall times of 2 µs.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits using infrared LED and NPN phototransistor technology.
• Offers fast switching performance with 2 µs rise and fall times for signal transmission applications.
• 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 between microprocessors and power stages
• Switching power supply feedback loops

Procurement Notes

Verify the manufacturer origin when sourcing this component, as it is produced by Vishay Semiconductors but distributed under the Isocom Components label. Confirm that the specific order suffix matches the required packaging format, such as tube or tape-and-reel variants like SFH617A-2X009T. Ensure compliance with RoHS directives and check for any recent product change notices regarding bond wire diameter or manufacturing location updates before finalizing procurement orders.

Selection Notes

Select the SFH617A-2 when a robust, through-hole isolated switch is required with moderate speed capabilities. The 5300 Vrms insulation rating supports high-voltage separation needs. Compare the 63–125% current transfer ratio against circuit gain requirements. Consider the 70 V collector-emitter voltage limit for load compatibility. Evaluate the PDIP-4 footprint against available board space compared to surface-mount alternatives like the SFH617A-2X009T.

Part Context

This component belongs to the SFH617 family of transistor output optocouplers. It serves as a direct equivalent to the VO617A series, offering similar pinout and electrical characteristics. The part number SFH617A-2 specifically denotes the through-hole DIP configuration, distinguishing it from surface-mount versions within the same functional family designed for general isolation tasks.

Replacement Considerations

Public confirmed substitute part numbers include VO617A-2. Verify pinout compatibility and insulation voltage ratings when substituting.