SFH617A-4

Overview

The SFH617A-4 is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It features an NPN phototransistor output housed in a PDIP-4 through-hole package. The device provides high isolation with a rated insulation voltage of 5300 Vrms. Key electrical parameters include a maximum collector-emitter voltage of 70 V, a maximum collector current of 50 mA, and a forward current of 60 mA. The current transfer ratio ranges from 160% to 320%, with typical rise and fall times of 4.6 µs and 15 µs respectively. It operates within a temperature range of -55°C to +110°C.

Feature Summary

• Provides galvanic isolation between input and output circuits using infrared LED and NPN phototransistor technology.
• Designed for high reliability applications requiring robust signal transmission across isolated domains.
• Capable of operating at elevated temperatures up to 110°C for demanding industrial environments.

Applications

• Industrial control systems requiring signal isolation
• Power supply feedback loops
• Microcontroller interface circuits

Procurement Notes

Verify the specific suffix against official Vishay documentation to ensure correct packaging and variant alignment. Confirm that the procurement source provides valid RoHS compliance data as indicated in manufacturer specifications. Cross-reference the part number with authorized distributor lists to avoid counterfeit components. Ensure the ordering quantity matches the tube packaging format specified in the datasheet.

Selection Notes

Select this component when a single-channel isolation solution with high current transfer ratio is required. The PDIP-4 package suits through-hole assembly processes. Consider the 5300 Vrms isolation rating for safety-critical applications. Evaluate the 70 V collector-emitter voltage limit against load requirements. Compare performance metrics with alternative Vishay models like the SFH617A-3 if different CTR or voltage ratings are needed.

Part Context

The SFH617A-4 belongs to the SFH617 series of transistor output optocouplers from Vishay. This series is characterized by high reliability and suitability for general-purpose isolation tasks. The component shares architectural similarities with other members of the family but differs in specific electrical ratings and packaging options. It serves as a standard solution for digital signal isolation in electronic designs.

Replacement Considerations

The VO617A-4 is listed as a recommended alternative in distributor documentation. Verify functional equivalence and pin compatibility before substitution. Check datasheet differences regarding voltage ratings and current transfer ratios to ensure design integrity is maintained during replacement.

FAQ

What is the maximum insulation voltage of the SFH617A-4?

The maximum insulation voltage is 5300 Vrms.

What type of output does the SFH617A-4 use?

It uses an NPN phototransistor output.

What is the operating temperature range for this component?

The operating temperature range is from -55°C to +110°C.