4N25S(TA)-V Optoisolator Equivalent & Substitute Parts

Part Overview

The 4N25S(TA)-V is a single-channel optoisolator transistor with base output manufactured by Everlight Electronics Co Ltd. This component provides 5000Vrms isolation voltage in a 6-SMD surface mount package. The part is currently in active production status with 756 units in stock.

Substitute parts are necessary when the 4N25S(TA)-V becomes unavailable, when alternative packaging formats are required, or when application requirements permit operation at different isolation voltage levels. The 4N25 base product family offers multiple variants across manufacturers with varying isolation ratings and electrical characteristics.

Substiute Parts

4N25S(TA)-V

Everlight Electronics Co LtdIn Stock: 8354N25S(TA)-V Datasheet

Current PartRFQ

4N25-300E

Broadcom LimitedIn Stock: 12694N25-300E Datasheet

SimilarRFQ

4N25-500E

Broadcom LimitedIn Stock: 40934N25-500E Datasheet

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4N25S

onsemiIn Stock: 33544N25S Datasheet

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4N25S-TA1

Lite-On Inc.In Stock: 103624N25S-TA1 Datasheet

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4N25SM

onsemiIn Stock: 30804N25SM Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 4N25S(TA)-V is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Number of Channels: Must equal 1
• Output Type: Must be Transistor with Base
• Package / Case: Must be 6-SMD, Gull Wing
• Mounting Type: Must be Surface Mount
• Input Type: Must be DC

Flexible Parameters (Application-Dependent):

• Voltage - Isolation: The 4N25S(TA)-V operates at 5000Vrms. Substitute parts with lower isolation ratings (2500Vrms, 4170Vrms, 5300Vrms) are acceptable when application requirements do not demand the full 5000Vrms isolation specification.
• Voltage - Output (Max): The 4N25S(TA)-V supports 80V maximum output. Substitutes with 30V maximum output are acceptable only in applications where output voltage does not exceed 30V.
• Current - DC Forward (If) (Max): The 4N25S(TA)-V permits 60mA maximum forward current. Substitutes with 80mA or 100mA ratings provide additional margin.
• Operating Temperature Range: The 4N25S(TA)-V operates from -55°C to 110°C. Substitutes with -55°C to 100°C range are acceptable for applications not requiring operation above 100°C.
• Packaging Format: Tape & Reel (TR), Cut Tape (CT), and Tube formats are interchangeable for component procurement purposes.

Compliance Parameters:

• RoHS Status: All substitute parts must maintain ROHS3 compliance
• Moisture Sensitivity Level: All parts are MSL 1 (Unlimited)

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The 4N25SM (onsemi) and 4N25S (onsemi) provide the closest electrical equivalence to the 4N25S(TA)-V, with isolation ratings of 4170Vrms and 5300Vrms respectively. Both maintain the 6-SMD Gull Wing package format and surface mount configuration. The 4N25SM is recommended for active production designs due to its Active product status. The 4N25S is available in inventory but carries Obsolete product status, limiting its suitability for new designs.

Secondary Substitutes (Lower Isolation Rating):

The 4N25-500E (Broadcom), 4N25-300E (Broadcom), and 4N25S-TA1 (Lite-On) operate at 2500Vrms isolation voltage. These parts are suitable for applications where the isolation requirement does not exceed 2500Vrms. All three maintain Active product status. The 4N25-500E is available in Tape & Reel packaging with 4020 units in stock. The 4N25S-TA1 offers the highest inventory availability at 10300 units and is available in Cut Tape and Digi-Reel formats.

Critical Limitation:

All substitute parts except the 4N25S(TA)-V itself specify a maximum output voltage of 30V. Applications requiring the full 80V output capability of the 4N25S(TA)-V cannot use these substitutes without circuit redesign.

Temperature Range Consideration:

The 4N25S(TA)-V operates to 110°C maximum. All substitute parts operate to 100°C maximum. Applications requiring operation above 100°C cannot use these substitutes.

Frequently Asked Questions (FAQ)

Q: Can the 4N25-300E or 4N25-500E be used as direct replacements for the 4N25S(TA)-V?

A: The 4N25-300E and 4N25-500E are functionally compatible at the package and pinout level. However, they operate at 2500Vrms isolation versus the 4N25S(TA)-V's 5000Vrms. Substitution is valid only when application isolation requirements do not exceed 2500Vrms. Additionally, these parts limit output voltage to 30V maximum, compared to 80V for the 4N25S(TA)-V.

Q: What is the difference between the 4N25S and 4N25SM?

A: Both are onsemi products with similar electrical characteristics. The 4N25S operates at 5300Vrms isolation with turn-on/turn-off times of 2µs. The 4N25SM operates at 4170Vrms isolation, also with 2µs switching times. The 4N25S carries Obsolete product status, while the 4N25SM is Active. For new designs, the 4N25SM is preferred.

Q: Are packaging format differences (Tape & Reel, Cut Tape, Tube) significant for substitution?

A: Packaging format differences do not affect electrical compatibility or circuit performance. Format selection is determined by procurement and assembly process requirements. The 4N25S(TA)-V is supplied in Tape & Reel format. Substitutes are available in Tape & Reel (4N25-500E), Cut Tape and Digi-Reel (4N25S-TA1), and Tube (4N25-300E, 4N25SM) formats.

Q: Why does the 4N25S(TA)-V have a higher maximum output voltage (80V) than the substitute parts (30V)?

A: This is a specified electrical characteristic difference between the parts. The 4N25S(TA)-V is rated for 80V maximum output voltage, while the Broadcom and Lite-On variants are rated for 30V maximum. Applications utilizing output voltages above 30V require the 4N25S(TA)-V or equivalent high-voltage variants.

Q: Is the 4N25S suitable for new production designs?

A: No. The 4N25S carries Obsolete product status. While 3317 units are currently in stock, this part should not be selected for new designs. The 4N25SM (Active status) or 4N25-500E (Active status) are appropriate alternatives depending on isolation voltage requirements.

Q: What is the significance of the 110°C maximum operating temperature of the 4N25S(TA)-V?

A: The 4N25S(TA)-V operates from -55°C to 110°C. All substitute parts operate from -55°C to 100°C. Applications requiring operation above 100°C cannot use the listed substitute parts without thermal management modifications or alternative component selection.

Q: Can I use the 4N25S-TA1 in high-volume production?

A: Yes. The 4N25S-TA1 (Lite-On) is Active status with 10300 units in inventory, the highest availability among all listed substitutes. It is suitable for production use when isolation requirements are 2500Vrms or lower and output voltage does not exceed 30V.

Q: What are the key parameters I must verify before substituting any part?

A: Verify the following parameters against your application requirements: (1) Isolation voltage rating must meet or exceed application requirements, (2) Maximum output voltage must accommodate your circuit design, (3) Operating temperature range must cover your application environment, (4) Forward current rating must support your LED drive current, (5) Package format must be compatible with your PCB assembly process.