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SFH615A-4X009

SFH615A-4X009

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

The SFH615A-4X009 is a single-channel optocoupler featuring a phototransistor output and a high isolation voltage of 5300Vrms. It provides galvanic isolation between low-voltage control circuits and high-voltage loads, utilizing a high current transfer ratio (CTR) of 160% to 320% for efficient signal coupling. This specific variant comes in a 4-pin SMD package designed for automated assembly in space-constrained layouts.

Why Choose This Part

This optoisolator offers a high 70V collector-emitter voltage rating and excellent CTR linearity across varying forward currents. Its low coupling capacitance minimizes noise feedthrough, while the 5300Vrms isolation rating ensures robust protection for safety-critical applications.

Applications

Switch Mode Power Supplies (SMPS)
Used in the feedback loop to provide regulated voltage control while maintaining electrical isolation between the primary and secondary stages.
Industrial PLC I/O
Protects sensitive microcontroller inputs from high-voltage transients and noise common in industrial sensor and actuator lines.
AC Mains Monitoring
Safe detection of zero-crossing or power-on status in appliances and industrial machinery.
RS-232/RS-485 Isolation
Breaking ground loops in long-distance serial communication links to prevent data corruption.

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 use this device, calculate the current-limiting resistor for the input LED based on the 1.35V typical forward voltage to achieve the desired CTR. Ensure the PCB layout maintains creepage and clearance distances required for the 5300Vrms isolation rating, avoiding copper pours beneath the optocoupler body.

Also Consider

FOD817D ONonsemi - Features high CTR and high-temperature operation suitable for industrial environments.