SFH628A-3X017

Overview

The SFH628A-3X017 is a single-channel surface-mount transistor output optocoupler from Vishay. It features an NPN phototransistor output with a collector-emitter voltage of 55V and a maximum collector current of 50mA. The device provides high isolation capability with a rated insulation voltage of 5300Vrms. Key electrical parameters include a forward voltage of 1.1V, a saturation voltage of 400mV, and a typical rise time of 3.5µs. The current transfer ratio ranges from 100% to 320% at a forward current of 1mA. It operates within a temperature range of -55°C to +100°C.

Feature Summary

• High isolation voltage rating of 5300Vrms for robust circuit separation
• Surface-mount 4-SMD gull-wing package design for automated assembly
• NPN phototransistor output configuration supporting up to 50mA load current

Applications

• Industrial control systems requiring galvanic isolation
• Signal transmission across isolated ground planes
• General-purpose digital or analog signal coupling in compact PCB layouts

Procurement Notes

Verify the specific suffix '3X017' against the manufacturer datasheet to confirm the exact reel quantity and tape specifications. Ensure the ordering part number matches the required packaging format, such as cut tape or full reels, as indicated in official distribution channels. Cross-reference the RoHS compliance status with current environmental regulations before finalizing procurement orders.

Selection Notes

Select this component when a small footprint SMD optocoupler with high isolation voltage is required. The 4-pin SMD package suits space-constrained designs compared to traditional DIP options. Consider the 55V collector voltage limit and 50mA current capacity to ensure compatibility with downstream logic or relay drivers. Verify thermal management requirements given the operating temperature range extends to 100°C.

Part Context

This device belongs to the SFH628 series of transistor output optocouplers manufactured by Vishay Semiconductor Opto Division. The series is designed for applications needing reliable electrical isolation between input and output circuits. The SFH628A variant specifically utilizes an NPN phototransistor structure. The '-3X017' suffix denotes the specific surface-mount packaging and taping configuration used for mass production integration.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult official Vishay cross-reference guides for potential alternatives.