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SFH6286-3T

1-ch optocoupler, 5.3kVrms, CTR 100-320%, phototransistor, SMD-4

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Manufacturer Part：

SFH6286-3T

Package：

SMD-4 (Gull Wing) (6.81 × 4.83 × 3.81 mm)

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Description

Product Overview

The SFH6286-3T from Vishay is a 1-channel optocoupler featuring a GaAs infrared emitting diode optically coupled to a silicon planar phototransistor detector in a compact SMD-4 package. It provides 5300 Vrms isolation voltage with a high current transfer ratio of 100-320% and is designed for signal transmission between electrically separated circuits.

Key Specifications

  • Isolation Voltage: 5300 Vrms (option 6: > 8mm creepage)
  • CTR: 100-320% @ 1 mA (Grade 3)
  • VCEO: 55 V
  • Forward Voltage: 1.1 V typ
  • Turn On/Off Time: 6 µs / 5.5 µs typ
  • Rise/Fall Time: 3.5 µs / 5 µs typ
  • VCE(sat): 400 mV max
  • Operating Temperature: -55°C to +100°C
  • Package: SMD-4 (Gull Wing), 6.81 × 4.83 × 3.81 mm

Features

  • High common mode interference immunity
  • Low coupling capacitance
  • Good CTR linearity depending on forward current
  • Low CTR degradation over lifetime
  • UL, cUL, BSI, FIMKO, CQC approved
  • RoHS compliant, MSL 1

Applications

  • Telecom interfaces
  • Industrial control systems
  • Battery powered equipment
  • Office machines
  • SMPS feedback loops

The SFH6286-3T from Vishay Semiconductors is a high-reliability optocoupler housed in an SMD-4 gull wing package. It features a GaAs infrared LED optically coupled to a silicon phototransistor, providing electrical isolation up to 5300 Vrms. The device achieves a current transfer ratio (CTR) of 100-320% at 1 mA forward current (Grade 3 bin), making it suitable for low-current drive applications. The SMD-4 package with option 7 provides creepage and clearance distances suitable for reinforced insulation per IEC 60950 at operating voltages up to 400 VRMS. The device carries UL, cUL, BSI, FIMKO, and CQC safety approvals, and exhibits low CTR degradation over extended operation.

The SFH6286-3T operates by converting an electrical input signal to infrared light via the GaAs LED, which is then detected by the silicon phototransistor on the output side. The optical coupling provides galvanic isolation between input and output circuits. When forward current flows through the LED, emitted photons are absorbed by the phototransistor base region, generating base current that drives the collector current. The CTR (Current Transfer Ratio) of 100-320% indicates the output collector current is 1-3.2 times the input LED current at 1 mA IF. The device maintains isolation integrity through the optically transparent but electrically insulating dielectric between LED and detector dice.

Pin Name Description
1 Anode LED Anode Input
2 Cathode LED Cathode Input
3 Emitter Phototransistor Emitter Output
4 Collector Phototransistor Collector Output
  • Telecom Interfaces: Isolated signal coupling in modem and telephone line interfaces with reinforced insulation
  • SMPS Feedback: Output voltage feedback loop isolation in switch-mode power supplies
  • Industrial Control: PLC I/O isolation, motor driver signal isolation, and sensor interface coupling
  • Battery-Powered Equipment: Low drive current (1 mA) enables efficient operation in portable devices
  • Office Machines: Signal isolation in printers, copiers, and scanner data paths
Model Brand CTR (%) Viso (Vrms) Package
SFH6286-2T Vishay 63-200 5300 SMD-4
SFH6286-4T Vishay 160-500 5300 SMD-4
SFH628A-3 Vishay 100-320 5300 DIP-4
PC817C Sharp 200-400 5000 DIP-4
CNY17-3 Vishay 100-200 5300 DIP-6
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Service & Packaging

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Contact Information

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Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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