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SFH615A-4X017

SFH615A-4X017

Vishay Semiconductor Opto Division
Optoisolator Transistor Output 5300Vrms 1 Channel 4-SMD
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Overview

The SFH615A-4X017 is a single-channel phototransistor optocoupler designed for signal isolation and level shifting in sensitive electronic circuits. It features a GaAs infrared emitting diode optically coupled to a silicon planar phototransistor detector within a surface-mount package. This component provides high galvanic isolation of 5300Vrms to protect low-voltage control logic from high-voltage transients and noise.

Why Choose This Part

This variant offers a high Current Transfer Ratio (CTR) and a robust 5300Vrms isolation rating suitable for safety-critical applications. With a typical rise and fall time of 2us and a low saturation voltage of 400mV, it balances switching speed with efficient power performance. The surface-mount 4-SMD gull wing package enables high-density PCB layouts and automated assembly.

Applications

Switching Power Supply Feedback
Provides isolated voltage feedback across the primary-secondary barrier in AC/DC converters.
Logic Ground Isolation
Eliminates ground loops between digital controllers and high-power peripherals in industrial systems.
Microprocessor System Interfaces
Protects MCU I/O pins from high-voltage spikes when interfacing with external sensors or actuators.
Industrial Controller I/O
Used in PLC and motor control interfaces to isolate signal paths from electromagnetic interference.

Key Specifications

Input Type DC
Output Type Transistor
Mounting Type Surface Mount
Package / Case 4-SMD, Gull Wing
Number of Channels 1
Voltage - Isolation 5300Vrms
Vce Saturation (Max) 400mV
Operating Temperature -55degC ~ 100degC
Rise / Fall Time (Typ) 2us, 2us
Voltage - Output (Max) 70V
Supplier Device Package 4-SMD
Current - Output / Channel 50mA
Current Transfer Ratio (Max) 320% @ 10mA
Current Transfer Ratio (Min) 160% @ 10mA
Voltage - Forward (Vf) (Typ) 1.35V
Turn On / Turn Off Time (Typ) 3us, 2.3us
Current - DC Forward (If) (Max) 60 mA

Getting Started

To implement this part, calculate the input series resistor to provide the desired forward current for the LED, typically between 1mA and 10mA. Ensure the creepage and clearance distances on the PCB layout respect the 5300Vrms isolation requirement. Monitor the collector-emitter voltage to ensure it stays below the 70V maximum rating during operation.

Also Consider

6N137S Everlight Electronics - Choose this high-speed logic gate optocoupler if your application requires data rates significantly faster than the 2us switching time of the SFH615A.