SFH618A-5X017

Overview

The SFH618A-5X017 is a single-channel transistor output optocoupler from Vishay Semiconductors, housed in a compact 4-SMD surface-mount package. It features an NPN phototransistor output with a high current transfer ratio ranging from 250% to 500%. The device supports a maximum forward current of 60 mA and offers robust isolation capabilities with a rated insulation voltage of 5300 Vrms. Electrical specifications include a maximum collector-emitter voltage of 55 V, a peak collector current of 100 mA, and a power dissipation limit of 150 mW. Switching performance is characterized by typical rise and fall times of 3.5 µs and 5 µs, respectively, ensuring reliable signal transmission within the specified operating temperature range.

Feature Summary

• Provides galvanic isolation between input and output circuits using infrared LED and NPN phototransistor technology.
• Delivers high current transfer efficiency with a guaranteed minimum CTR of 250% for robust signal coupling.
• Ensures safety compliance through a high dielectric strength rating of 5300 Vrms between emitter and collector terminals.

Applications

• Industrial control systems requiring isolated signal interfaces
• Power supply feedback loops for voltage regulation
• Microcontroller input/output isolation in embedded systems

Procurement Notes

Verify the specific suffix X017 confirms the 4-SMD surface-mount package configuration distinct from through-hole variants. Confirm the CTR binning corresponds to the 250-500% range required for the application design. Ensure compatibility with standard reflow soldering profiles suitable for small outline packages. Cross-reference the manufacturer datasheet for precise pinout definitions and recommended land pattern dimensions to prevent assembly errors.

Selection Notes

Select this component when high isolation voltage and fast switching speeds are critical for system safety and performance. The wide CTR range accommodates variations in LED drive currents while maintaining consistent output states. Consider the thermal constraints imposed by the 150 mW power dissipation limit during continuous operation. Evaluate the physical footprint requirements against available PCB space for the 4-SMD form factor.

Part Context

This part belongs to the SFH618A series of transistor output optocouplers designed for general-purpose isolation applications. The series includes various packaging options and CTR bins to suit different mechanical and electrical needs. Vishay Semiconductors manufactures these devices to meet international safety standards for electronic equipment.

Replacement Considerations

Direct substitutes include other SFH618A variants with matching SMD packaging and compatible CTR ranges, such as SFH618A-5X016 for through-hole or SFH618A-4X016 for lower CTR requirements. Verify pinout compatibility before substitution.