SFH628A-3X017T

Overview

The SFH628A-3X017T is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It features an NPN phototransistor output and supports AC/DC input signals. The device provides 5300 Vrms isolation voltage and operates within a temperature range of -55°C to +100°C. Key electrical parameters include a maximum collector-emitter voltage of 55V, a maximum collector current of 50mA, and a forward voltage of 1.1V typical at 50mA forward current. The current transfer ratio ranges from 100% to 320% at 1mA forward current. Switching characteristics include typical rise and fall times of 3.5µs and 5µs, respectively, with a saturation voltage of 400mV maximum.

Feature Summary

• Provides high common mode interference immunity for reliable signal transmission in noisy environments.
• Features low coupling capacitance to minimize capacitive coupling effects between input and output circuits.
• Delivers good current transfer ratio linearity dependent on the forward input current.

Applications

• Industrial control systems requiring galvanic isolation
• Signal isolation in measurement and testing equipment
• Power supply feedback loops for voltage regulation

Procurement Notes

Verify the specific suffix '3X017T' corresponds to the required tape and reel packaging configuration, as standard variants may differ in shipping units. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer, as availability fluctuates based on production schedules. Ensure the ordering part number matches the exact pinout and package dimensions specified in the official datasheet to prevent PCB layout errors during assembly.

Selection Notes

Select this component when high isolation voltage (5300 Vrms) and AC/DC input compatibility are required. It is suitable for applications demanding fast switching speeds with typical rise/fall times under 6µs. Consider the 50mA collector current limit and 55V collector-emitter voltage rating for load matching. The surface-mount SMD-4 package facilitates automated assembly in compact designs.

Part Context

This device belongs to the SFH628 series of transistor output optocouplers designed for general-purpose isolation applications. It shares functional similarities with other Vishay SFH models but offers specific performance metrics regarding speed and isolation voltage tailored for industrial and commercial electronics. The series emphasizes reliability and linearity for precise analog and digital signal transfer across isolation barriers.

Replacement Considerations

Direct substitutes include SFH628A-3X009T for different packaging options and SFH628A-3X017TTR for identical reel specifications. Cross-reference with SFH620AGB-X017T if higher CTR is needed, though package and isolation specs differ. Verify pin compatibility and thermal characteristics before swapping with generic transistor output optocouplers.