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Vishay SFH691AT Optocoupler

The SFH691AT is a high-performance optocoupler featuring a GaAs infrared LED emitter and a silicon planar phototransistor detector within a compact SOP-4 package. It offers high current transfer ratio, low coupling capacitance, and excellent isolation voltage up to 3750 Vms. Designed for signal transmission between electrically isolated circuits, it is optimized for space-constrained applications like high-density PCBs, PLCs, and telecommunications. The device is UL1577 approved, RoHS Compliant, and ideal for safe, reliable electrical isolation in complex electronic systems.

Authorized Distributors
Source:Newark
Part No:SFH691AT
Stock:742
Inv Date:06-09-2026
Price: Unit price: $1.15
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Source:DigiKey
Part No:SFH691AT
Stock:0
Inv Date:06-09-2026
Price: Unit price: $0.42147
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Part No:SFH691AT
Stock:0
Inv Date:06-10-2026
Price: Unit price: $1.01
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Part No:SFH691AT
Stock:0
Inv Date:06-09-2026
Price: Unit price: $0.31
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Source:Arrow EU
Part No:SFH691AT
Stock:24000
Inv Date:06-10-2026
Price: N/A
Buy/RFQ:
Part No:SFH691AT
Stock:105
Inv Date:06-10-2026
Price: N/A
Buy/RFQ:

Vishay SFH691AT Optocoupler Specifications:

  • Isolation test voltage: 3750 Vms (1 s)
  • Collector-emitter voltage Vceo: 70 V
  • Emitter-collector voltage Veco: 7 V
  • Collector current: 50 mA (continuous), 100 mA (pulse 1 ms)
  • Input forward current: 50 mA
  • Total power dissipation: 80 mW (input), 150 mW (output)
  • Coupling capacitance: 0.4 pF
  • Rise time: 3 μs
  • Fall time: 4 μs
  • Maximum junction temperature: 100 °C
  • Operating temperature range: -55°C to +150°C
  • Package: SOP-4, 100 mil lead pitch
  • Device compliance: UL1577, CSA, FIMKO, IEC 60747-5-5
  • Material: GaAs LED and silicon phototransistor, RoHS compliant

Buy the VISHAY Series SFH Series Optical Isolator: SFH691AT

Purchase the Vishay SFH691AT optocoupler online today to ensure your electronic systems are protected with reliable electrical isolation. This compact device features a GaAs infrared LED and a silicon phototransistor, providing high isolation voltage of 3750 Vms, a high current transfer ratio, and fast switching times ideal for space-constrained applications like PLCs, telecommunication equipment, and high-density PCBs. With UL1577 and RoHS compliance, it guarantees safety, durability, and excellent performance in critical safety applications. Order now for swift delivery and seamless integration into your designs.

Buy Vishay SFH691AT optocoupler now and experience unmatched electrical isolation and fast switching capabilities for safe and reliable circuit communication.

Frequently Asked Questions

Where can I buy Vishay SFH691AT?

You can click on the BUY or RFQ button to purchase SFH691AT from an authorized Vishay distributor.

How do I troubleshoot issues or seek technical support for part SFH691AT?

You can download the SFH691AT datasheet or visit the Vishay website for support.

Who is the manufacturer of SFH691AT?

Vishay

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