4N25S(TA) Optoisolator Equivalent & Substitute Parts

Part Overview

The 4N25S(TA) is an optoisolator transistor with base output manufactured by Everlight Electronics Co Ltd. This component provides 5000Vrms isolation with a single channel configuration in a 6-SMD surface mount package. The device is designed for DC input applications requiring galvanic isolation with transistor output capability.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter range. Alternative sources may be required due to inventory availability, supply chain considerations, or design flexibility requirements.

Substiute Parts

4N25S(TA)

Everlight Electronics Co LtdIn Stock: 54534N25S(TA) Datasheet

Current PartRFQ

4N25-X007T

Vishay Semiconductor Opto DivisionIn Stock: 125894N25-X007T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Isolation Voltage: The substitute part must maintain 5000Vrms isolation rating to preserve galvanic isolation performance.

Channel Configuration: Single channel requirement must be maintained.

Current Transfer Ratio: Minimum 20% @ 10mA specification must be met or exceeded.

Output Type: Transistor with base output configuration is required for functional compatibility.

Package and Mounting: 6-SMD, Gull Wing surface mount package ensures mechanical and PCB layout compatibility.

Compliance: RoHS3 compliance is mandatory for regulatory alignment.

The 4N25-X007T (Vishay Semiconductor Opto Division) meets all critical substitution criteria within the specified parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (4N25S(TA)): Everlight Electronics Co Ltd manufacture. Active product status with 5400 pcs inventory availability. Full compliance with ROHS3 and EAR99 classification. Operating temperature range -55°C to 110°C.

Substitute Selection (4N25-X007T): Vishay Semiconductor Opto Division manufacture. Active product status with 12570 pcs inventory availability. Full compliance with ROHS3, REACH Unaffected, and EAR99 classification. Operating temperature range -55°C to 100°C.

Compatibility Notes: The 4N25-X007T operates within a reduced maximum output voltage specification (70V vs 80V) and a narrower upper operating temperature limit (100°C vs 110°C). These parameters must be evaluated against application requirements. Both parts maintain identical isolation voltage, current transfer ratio minimum, Vce saturation, and forward current specifications.

Frequently Asked Questions (FAQ)

Q: Can 4N25-X007T replace 4N25S(TA) in all applications?

A: Substitution is valid when application requirements do not exceed 70V maximum output voltage and 100°C maximum operating temperature. Both parts maintain 5000Vrms isolation and 20% minimum current transfer ratio.

Q: What are the key differences between these optoisolators?

A: Maximum output voltage differs (80V vs 70V). Operating temperature upper limit differs (-55 to 110°C vs -55 to 100°C). Forward voltage is slightly higher in the Vishay part (1.36V vs 1.2V). Rise/fall time specifications differ (3µs vs 2µs for Vishay).

Q: Are both parts RoHS compliant?

A: Yes. Both 4N25S(TA) and 4N25-X007T are ROHS3 compliant. The Vishay part additionally carries REACH Unaffected status.

Q: Is the package identical between these parts?

A: Yes. Both parts use 6-SMD, Gull Wing surface mount package with identical supplier device package designation. PCB layout compatibility is maintained.

Q: What is the moisture sensitivity level?

A: Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage or handling.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes, from a mechanical and electrical interface perspective. Functional validation is required if application operates near the 70V output voltage limit or above 100°C ambient temperature.