4N26VM Optoisolator Equivalent & Substitute Parts

Part Overview

The 4N26VM is an optoisolator transistor with base output manufactured by onsemi, featuring 4170Vrms isolation voltage in a 6-DIP package. This component provides galvanic isolation for DC input signals with transistor output capability. The 4N26VM is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. Direct alternatives and functionally compatible substitutes are available from onsemi and Vishay Semiconductor Opto Division.

Substiute Parts

4N26VM

onsemiIn Stock: 10474N26VM Datasheet

Current PartRFQ

4N26M

onsemiIn Stock: 509034N26M Datasheet

DirectRFQ

4N26-X001

Vishay Semiconductor Opto DivisionIn Stock: 10744N26-X001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 4N26VM is determined by the following critical parameters:

• Isolation Voltage: Minimum 4170Vrms required for direct substitution
• Output Configuration: Transistor with Base output mandatory
• Package Type: 6-DIP (0.300", 7.62mm) for mechanical compatibility
• Number of Channels: Single channel requirement
• Input Type: DC input
• Current Transfer Ratio: Minimum 20% @ 10mA
• Operating Temperature Range: Must support -40°C ~ 100°C minimum

Substitute parts are classified into two categories:

Direct Manufacturer Equivalent: Parts from onsemi with identical electrical specifications and active product status, providing seamless replacement capability.

Similar Manufacturer Alternative: Parts from alternative manufacturers with enhanced or equivalent isolation voltage and compatible output characteristics, suitable for applications where higher performance margins are acceptable.

Parameter Comparison

Engineering Selection Recommendations

4N26M (onsemi): This part is the recommended direct replacement for the obsolete 4N26VM. It maintains identical electrical specifications, isolation voltage, and operating temperature range. The 4N26M holds active product status with ROHS3 compliance and REACH unaffected certification, ensuring long-term availability and regulatory alignment. Tube packaging provides standard component handling for production environments.

4N26-X001 (Vishay Semiconductor Opto Division): This alternative provides enhanced isolation voltage (5000Vrms versus 4170Vrms) and extended output voltage capability (70V maximum versus 30V). The wider operating temperature range (-55°C to 100°C) accommodates more demanding thermal environments. This part is suitable for applications where higher isolation margins or increased output voltage headroom are beneficial. ROHS3 compliance and REACH unaffected status confirm regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the 4N26M directly replace the 4N26VM without circuit modifications?

A: Yes. The 4N26M maintains identical electrical specifications, isolation voltage (4170Vrms), output voltage rating (30V), and operating temperature range (-40°C to 100°C). Pin configuration and package dimensions are identical. No circuit modifications are required.

Q: What are the key differences between 4N26M and 4N26-X001?

A: The 4N26-X001 provides higher isolation voltage (5000Vrms versus 4170Vrms), higher maximum output voltage (70V versus 30V), and extended low-temperature operation (-55°C versus -40°C). Both maintain the same current transfer ratio (20% @ 10mA) and transistor with base output configuration. The 4N26-X001 is suitable for applications requiring enhanced performance margins.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All listed substitutes use the 6-DIP (0.300", 7.62mm) package with through-hole mounting. PCB footprints are mechanically identical, allowing direct board-level substitution.

Q: What is the product status significance for component selection?

A: The 4N26VM is obsolete, making it unavailable for new procurement. The 4N26M and 4N26-X001 are both active products with confirmed ongoing manufacturing and supply availability. Active status ensures long-term component sourcing for production and field support.

Q: Do all substitute parts meet the same regulatory requirements?

A: The 4N26M and 4N26-X001 both carry ROHS3 compliance and REACH unaffected certification. The original 4N26VM does not specify RoHS status. For applications requiring RoHS compliance, the 4N26M or 4N26-X001 are required.