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SFH6186-4

SFH6186-4

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

The SFH6186-4 is a single-channel phototransistor optocoupler designed for signal isolation and noise suppression in digital and analog circuits. It provides high-voltage isolation of 5300Vrms between the input LED and the output transistor while maintaining a compact 4-SMD footprint. This device is particularly useful for protecting sensitive microcontrollers from high-voltage transients in industrial environments.

Why Choose This Part

This component features a high isolation voltage of 5300Vrms and a low saturation voltage of 400mV, ensuring efficient switching and signal integrity. It operates across a wide temperature range of -55 to 100 degrees Celsius and offers fast typical rise and fall times of 3.5us and 5us for high-speed signal processing.

Applications

Switch Mode Power Supply (SMPS) Feedback
Provides isolated feedback loops in power converters to maintain regulation while protecting the primary control side.
Industrial PLC I/O Isolation
Protects logic-level circuitry from 24V industrial field signals and transient spikes on digital input/output cards.
RS-232/RS-485 Data Isolation
Used to break ground loops and provide galvanic isolation in long-distance communication lines.
Motor Control Gate Driving
Acts as an interface between low-power control signals and high-power motor drive stages to prevent noise coupling.

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) 3.5us, 5us
Voltage - Output (Max) 55V
Supplier Device Package 4-SMD
Current - Output / Channel 50mA
Current Transfer Ratio (Max) 320% @ 1mA
Current Transfer Ratio (Min) 160% @ 1mA
Voltage - Forward (Vf) (Typ) 1.1V
Turn On / Turn Off Time (Typ) 6us, 5.5us
Current - DC Forward (If) (Max) 60 mA

Getting Started

When designing with the SFH6186-4, ensure the input current (IF) is appropriately limited by a series resistor based on the 1.1V typical forward voltage. For PCB layout, maintain strict creepage and clearance distances under the 4-SMD package to preserve the 5300Vrms isolation rating. Use a decoupling capacitor near the collector pin of the output transistor to minimize noise on the isolated signal line.