4N28

$0.10

Description：OPTOISO 0.5KV TRANS W/BASE 8-DIP
Series：4N2X
Mfr：Lite-On Inc.
Package：Tube

SKU:ef639edc7a41 Category: Transistor, Photovoltaic Output Optoisolators Brand: Lite-On Inc.

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Product introduction

Product Detailed Parameters

Description：OPTOISO 0.5KV TRANS W/BASE 8-DIP
Series：4N2X
Mfr：Lite-On Inc.
Package：Tube
Number of Channels：1
Voltage - Isolation：500Vrms
Current Transfer Ratio (Min)：10% @ 10mA
Current Transfer Ratio (Max)：-
Turn On / Turn Off Time (Typ)：-
Rise / Fall Time (Typ)：3µs, 3µs
Input Type：DC
Output Type：Transistor with Base
Voltage - Output (Max)：30V
Current - Output / Channel：100mA
Voltage - Forward (Vf) (Typ)：1.2V
Current - DC Forward (If) (Max)：80 mA
Vce Saturation (Max)：500mV
Operating Temperature：-55°C ~ 100°C
Mounting Type：Through Hole
Package / Case：8-DIP (0.300", 7.62mm)
Supplier Device Package：8-DIP
Grade：-
Qualification：-

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4N28

Overview

The Lite-On Inc. 4N28 is a general-purpose transistor output optocoupler featuring an NPN phototransistor. It provides electrical isolation with a rated insulation voltage of 5000 Vrms. The device operates within a temperature range of -55°C to +100°C and utilizes a DIP-6 through-hole package. Key electrical parameters include a maximum collector-emitter voltage of 70 V, a forward current rating of 60 mA, and a minimum current transfer ratio of 30%. Switching characteristics specify rise and fall times of 3 µs each.

Feature Summary

Provides galvanic isolation between input and output circuits using infrared light transmission.
Features an NPN phototransistor output for direct logic interface compatibility.
Designed for high-voltage isolation applications requiring robust signal integrity.

Applications

Signal isolation in industrial control systems
Interface circuits for microprocessors and logic gates
Switch-mode power supply feedback loops

Procurement Notes

Verify the manufacturer designation on the component marking, as multiple vendors produce this part number. Confirm that the specific datasheet aligns with the required insulation voltage and current transfer ratio specifications for your design. Ensure the package type matches the PCB footprint requirements before finalizing procurement.

Selection Notes

Select this component when a standard NPN output optocoupler is required for basic isolation tasks. Consider the 3 µs switching speed for moderate frequency applications. Evaluate the 5000 Vrms insulation rating against the system's safety requirements. Compare current transfer ratio variations across different manufacturers if precise gain control is necessary.

Part Context

The 4N28 belongs to the widely used family of single-channel transistor output optocouplers. It serves as a fundamental component for isolating low-voltage digital signals from higher voltage analog or power circuits. Its standardized DIP-6 package facilitates easy integration into legacy and modern through-hole designs.