Equivalent & Substitute Parts for 4N25M-V Optoisolator

Part Overview

The 4N25M-V is an optoisolator transistor manufactured by Everlight Electronics Co Ltd, designed for high-voltage isolation applications. This component features a 5000Vrms isolation rating with transistor output and base connection in a 6-DIP package. The device is actively produced and widely used in industrial control, power supply, and signal isolation circuits where galvanic isolation is required between input and output stages.

Substitute parts are identified when equivalent electrical and mechanical parameters allow direct replacement without circuit redesign. Substitution candidates must maintain compatibility in isolation voltage, channel configuration, package form factor, and output characteristics.

Substiute Parts

4N25M-V

Everlight Electronics Co LtdIn Stock: 10844N25M-V Datasheet

Current PartRFQ

4N25TVM

Fairchild SemiconductorIn Stock: 58444N25TVM Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of optoisolator components is determined by strict alignment of electrical isolation characteristics, output stage configuration, and physical package compatibility. The 4N25M-V operates within defined parameter boundaries that establish the substitution criteria.

Critical substitution parameters:

• Isolation Voltage: The substitute must provide isolation voltage equal to or greater than the main part specification (5000Vrms minimum)
• Channel Configuration: Single-channel operation is required; multi-channel alternatives are not compatible
• Output Stage: Transistor with base output topology must be maintained for circuit compatibility
• Package Form Factor: 6-DIP through-hole package is mandatory for PCB footprint alignment
• Current Transfer Ratio: Minimum 20% @ 10mA ensures adequate output drive capability
• Output Voltage Rating: Maximum output voltage capability must support circuit requirements
• Saturation Voltage: Vce(sat) characteristics affect logic-level switching performance

Substitutes identified in this reference maintain these critical parameters within acceptable engineering tolerances for direct component replacement.

Parameter Comparison

Engineering Selection Recommendations

4N25M-V (Everlight Electronics Co Ltd): Primary selection for applications requiring 5000Vrms isolation voltage rating. Active product status with established supply chain. ROHS3 compliant. Recommended for high-voltage isolation circuits where maximum isolation voltage specification is a design requirement.

4N25TVM (Fairchild Semiconductor): Acceptable substitute for applications with isolation voltage requirements ≤4170Vrms and maximum output voltage ≤30V. Operating temperature range limited to -40°C to 100°C. Faster switching characteristics (2µs vs 3µs) may provide performance advantage in timing-sensitive circuits. Active product status. Suitable for cost-optimized designs where lower isolation voltage rating is acceptable.

Substitution Constraints:

• 4N25TVM cannot replace 4N25M-V in circuits requiring 5000Vrms isolation voltage
• 4N25TVM cannot replace 4N25M-V in circuits requiring output voltage >30V
• 4N25TVM cannot replace 4N25M-V in applications operating below -40°C or above 100°C
• Both parts maintain identical 6-DIP package footprint and through-hole mounting compatibility
• Both parts maintain identical current transfer ratio and saturation voltage specifications

Frequently Asked Questions (FAQ)

Q: Can 4N25TVM directly replace 4N25M-V in all applications?

A: No. The 4N25TVM has lower isolation voltage (4170Vrms vs 5000Vrms) and lower maximum output voltage (30V vs 80V). Substitution is valid only when circuit isolation voltage requirements do not exceed 4170Vrms and output voltage requirements do not exceed 30V.

Q: What is the primary difference between these two optoisolators?

A: The main differences are isolation voltage rating (5000Vrms for 4N25M-V vs 4170Vrms for 4N25TVM), maximum output voltage (80V vs 30V), and operating temperature range (-55°C to 110°C vs -40°C to 100°C). Both maintain identical package, channel configuration, and output stage topology.

Q: Are the 6-DIP packages physically identical?

A: Yes. Both parts use 6-DIP (0.400", 10.16mm) through-hole packages with identical PCB footprints and pin configurations. Physical substitution on the PCB is compatible.

Q: Does the 4N25TVM have faster switching speed?

A: Yes. The 4N25TVM has turn-on/turn-off times of 2µs compared to 3µs for the 4N25M-V. This faster switching may be advantageous in high-frequency applications, provided isolation voltage and output voltage requirements are met.

Q: What compliance certifications apply to both parts?

A: The 4N25M-V is ROHS3 compliant with MSL rating of 1 (Unlimited). Both parts carry ECCN EAR99 and HTSUS 8541.49.8000 classifications.

Q: Can I use 4N25M-V as a substitute for 4N25TVM?

A: Yes. The 4N25M-V can replace 4N25TVM in all applications. The higher isolation voltage (5000Vrms vs 4170Vrms) and higher output voltage rating (80V vs 30V) provide additional design margin. Operating temperature range is also wider (-55°C to 110°C vs -40°C to 100°C).