4N25300 Optoisolator Equivalent & Substitute Parts

Part Overview

The 4N25300 is an optoisolator transistor with base output manufactured by onsemi, rated for 5300Vrms isolation voltage in a 6-DIP package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 4N25300 provides galvanic isolation with transistor output capability suitable for high-voltage switching and signal transmission applications.

Substiute Parts

4N25300

onsemiIn Stock: 8394N25300 Datasheet

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4N25VM

onsemiIn Stock: 221974N25VM Datasheet

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4N25

Texas InstrumentsIn Stock: 384244N25 Datasheet

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4N25

Texas InstrumentsIn Stock: 384244N25 Datasheet

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4N25-060E

Broadcom LimitedIn Stock: 9864N25-060E Datasheet

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4N25-X000

Vishay Semiconductor Opto DivisionIn Stock: 8084N25-X000 Datasheet

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4N25-X001

Vishay Semiconductor Opto DivisionIn Stock: 9924N25-X001 Datasheet

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4N25X

Isocom Components 2004 LTDIn Stock: 12014N25X Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 4N25300 is determined by the following critical parameters:

• Package compatibility: 6-DIP (0.300", 7.62mm) form factor
• Isolation voltage: Minimum 5300Vrms or equivalent rating
• Output configuration: Transistor with base output
• Current transfer ratio: Minimum 20% @ 10mA
• Operating temperature range: -55°C to 100°C or compatible range
• Input type: DC
• Vce saturation: 500mV maximum

Substitute parts are grouped into two categories:

Direct Substitutes maintain the same isolation voltage (5300Vrms) and electrical characteristics:

• 4N25X (Isocom Components 2004 LTD)

Functional Equivalents provide compatible isolation voltage (5000Vrms or higher) with equivalent or superior electrical performance:

• 4N25VM (onsemi, 4170Vrms)
• 4N25 (Texas Instruments, 5000Vrms)
• 4N25-X000 (Vishay Semiconductor Opto Division, 5000Vrms)
• 4N25-X001 (Vishay Semiconductor Opto Division, 5000Vrms)
• 4N25-060E (Broadcom Limited, 2500Vrms)

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 4N25X (Isocom Components 2004 LTD)

The 4N25X is the optimal direct substitute, matching the 4N25300 in isolation voltage (5300Vrms), output voltage rating (30V), and operating temperature range (-55°C to 100°C). Both parts share identical package geometry and electrical specifications. The 4N25X is actively produced and ROHS3 compliant, providing long-term availability and regulatory compliance.

Secondary Substitutes: 4N25-X000 and 4N25-X001 (Vishay Semiconductor Opto Division)

These parts provide 5000Vrms isolation, slightly below the 4N25300 specification but within acceptable margins for most applications. Both are actively produced, ROHS3 compliant, and offer higher output voltage capability (70V maximum). The 4N25-X001 is supplied in tube packaging for production environments.

Alternative Substitute: 4N25 (Texas Instruments)

The Texas Instruments 4N25 provides 5000Vrms isolation with 70V output voltage capability and 50mA output current. This part is actively produced but is RoHS non-compliant and REACH affected, requiring evaluation against regulatory requirements. Operating temperature range matches the 4N25300 (-55°C to 100°C).

Lower Isolation Voltage Option: 4N25-060E (Broadcom Limited)

The 4N25-060E provides 2500Vrms isolation, suitable only for applications where reduced isolation voltage is acceptable. This part offers higher output current capability (100mA) and is ROHS3 compliant. Use only when isolation voltage requirements permit.

Not Recommended: 4N25VM (onsemi)

The 4N25VM provides reduced isolation voltage (4170Vrms) and narrower operating temperature range (-40°C to 100°C), making it unsuitable as a direct substitute for the 4N25300 in applications requiring full temperature range operation.

Frequently Asked Questions (FAQ)

Q: Can the 4N25X directly replace the 4N25300 without circuit modification?

A: Yes. The 4N25X matches the 4N25300 in isolation voltage (5300Vrms), output voltage rating (30V), package geometry (6-DIP), and operating temperature range (-55°C to 100°C). Pin-for-pin compatibility is maintained.

Q: What is the minimum acceptable isolation voltage for substitution?

A: The 4N25300 is rated for 5300Vrms isolation. Substitutes with 5000Vrms or higher isolation voltage (4N25-X000, 4N25-X001, 4N25) are functionally equivalent. The 4N25-060E at 2500Vrms is acceptable only if application requirements permit reduced isolation voltage.

Q: Are all substitute parts RoHS compliant?

A: Most substitutes are ROHS3 compliant (4N25X, 4N25VM, 4N25-X000, 4N25-X001, 4N25-060E). The Texas Instruments 4N25 is RoHS non-compliant and REACH affected. Verify compliance requirements before selection.

Q: What is the difference between 4N25-X000 and 4N25-X001?

A: Both parts are electrically identical with 5000Vrms isolation voltage. The primary difference is packaging: 4N25-X000 has unspecified packaging, while 4N25-X001 is supplied in tube packaging suitable for automated assembly.

Q: Can I use the 4N25-060E as a substitute?

A: The 4N25-060E is compatible only if your application permits 2500Vrms isolation voltage. It offers higher output current (100mA) but reduced isolation capability. Verify isolation voltage requirements before substitution.

Q: What is the operating temperature range limitation for the 4N25VM?

A: The 4N25VM operates from -40°C to 100°C, compared to the 4N25300 range of -55°C to 100°C. Use the 4N25VM only if your application does not require operation below -40°C.

Q: Are there pin-for-pin compatible alternatives from other manufacturers?

A: Yes. The 4N25X (Isocom), 4N25-X000 and 4N25-X001 (Vishay), and 4N25 (Texas Instruments) all use the same 6-DIP package with identical pinout. Broadcom's 4N25-060E also maintains pin compatibility.