4N28 The Vishay 4N28 is a single-channel phototransistor output optocoupler. It offers 5000 VRMS isolation and is housed in a standard DIP-6 package.
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4N28

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The Vishay 4N28 is a single-channel phototransistor output optocoupler. It offers 5000 VRMS isolation and is housed in a standard DIP-6 package.
✓ Total Stock: 846 pcs
$ Price Range: $0.99

4N28 Available from 1 distributor

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✓ Non-Authorised
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4N28 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
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Manufacturer Name
Forward Voltage
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4N28 Description

Short technical summary and product information.

The Vishay 4N28 is an industry-standard single-channel optocoupler featuring a gallium arsenide infrared LED and a silicon NPN phototransistor. It provides a high isolation test voltage of 5000 VRMS, making it suitable for applications requiring electrical isolation.

 

Key electrical characteristics include a maximum forward current of 60 mA, a maximum collector emitter breakdown voltage of 70 V, and a maximum collector current of 100 mA. The input-output coupling capacitance is less than 0.5 pF, ensuring good signal integrity.

 

This optocoupler is designed for applications such as AC mains detection, switch mode power supply feedback, and logic ground isolation. It comes in a standard 6-pin dual-in-line package (DIP-6) suitable for through-hole mounting.

 

The 4N28 is compliant with RoHS directive 2002/95/EC and WEEE 2002/96/EC. Agency approvals include UL1577.

4N28 Quick Information

Product Type: Optocoupler
Canonical Name: 4N28 Phototransistor Output Optocoupler
Subcategory: Phototransistor Output Optocoupler

4N28 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

4N28 Estimated Pricing

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1+ $0.99 $0.99

Estimated market price range - modelled values for guidance only, not live distributor offers.

4N28 Features

  • 5000 VRMS isolation test voltage.
  • Phototransistor output type.
  • 60 mA maximum forward current.
  • 70 V collector-emitter breakdown voltage.
  • Industry standard DIP-6 package.

4N28 Applications

  • AC mains detection circuits.
  • Switch mode power supply feedback.
  • Logic ground isolation.
  • Telephone ring detection.

4N28 FAQs

6 frequently asked questions generated from this part’s specifications.
What is the isolation test voltage for the 4N28 optocoupler?

The isolation test voltage is 5000 VRMS.

What is the maximum forward current for the 4N28?

The maximum forward current is 60 mA.

What is the collector emitter breakdown voltage of the 4N28?

The collector emitter breakdown voltage is 70 V.

What package type is the 4N28 optocoupler supplied in?

The 4N28 is supplied in a DIP-6 package.

What is the typical forward voltage for the 4N28?

The typical forward voltage is 1.5 V.

What is the typical current transfer ratio for the 4N28?

The typical current transfer ratio is 50%.

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