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4N27

The 4N27 is a single-channel phototransistor output optocoupler from Fairchild Semiconductor. It offers 5000 VRMS isolation and is housed in a standard DIP-6 package.

✓ Total Stock: 7,673 pcs

$ Price Range: $0.99

4N27 Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Optech Co.,Limited ✓ Non-Authorised Inventory information	7,673 pcs On Request	7673 pcs	On Request	1	On Request	On Request	1339+	On Request	On Request

4N27 Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	Fairchild Camera&Instrument
Forward Current	60 mA
Forward Voltage	1.5 V
Mounting Type	Through Hole
Number of Channels	1 Channel

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4N27 Description

Short technical summary and product information.

The 4N27 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 and a maximum collector current of 100 mA. The device also features a typical forward voltage of 1.5 V and a maximum collector emitter breakdown voltage of 70 V. Its input-output coupling capacitance is less than 0.5 pF.

The 4N27 is designed for various applications such as AC mains detection, switch mode power supply feedback, logic ground isolation, and logic coupling with high-frequency noise rejection. It is supplied in a standard 6-pin dual-in-line package (DIP-6) suitable for through-hole mounting.

This optocoupler family includes agency approvals such as UL1577, making it suitable for a wide range of industrial and consumer electronics designs.

4N27 Quick Information

Product Type: Optocoupler

Canonical Name: 4N27 Phototransistor Output Optocoupler

Subcategory: Phototransistor Output

4N27 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

4N27 Estimated Pricing

Qty	Low	High
1+	$0.99	$0.99

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

4N27 Features

5000 VRMS isolation test voltage.
Single channel phototransistor output.
60 mA maximum forward current.
70 V collector emitter breakdown voltage.
Industry standard DIP-6 package.

4N27 Applications

AC mains detection circuits.
Switch mode power supply feedback.
Logic ground isolation.
Telephone ring detection.
High frequency noise rejection.

4N27 FAQs

5 frequently asked questions generated from this part’s specifications.

What is the isolation voltage of the 4N27 optocoupler?

The isolation test voltage is 5000 VRMS.

What is the package type for the 4N27?

The 4N27 is supplied in a DIP-6 package.

What is the maximum forward current for the 4N27?

The maximum forward current is 60 mA.

What is the maximum collector emitter breakdown voltage?

The maximum collector emitter breakdown voltage is 70 V.

What are some applications for the 4N27 optocoupler?

Applications include AC mains detection, switch mode power supply feedback, and logic ground isolation.

4N27 Alternate Parts

Same form/fit/function or matching attribute configuration across different manufacturers.

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4N35SR2VM

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The ON Semiconductor 4N35SR2VM is a transistor output optocoupler designed for various electronic applications. It features a 7500 Vrms isolation voltage and operates within a temperature range of -55 C to +100 C.

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