4N27VM Optoisolator - Equivalent & Substitute Parts

Part Overview

The 4N27VM is an optoisolator transistor with base output manufactured by onsemi, designed for high-voltage isolation applications requiring 4170Vrms isolation rating. This component features a single-channel configuration with transistor output and integrated base connection, housed in a 6-DIP through-hole package.

The 4N27VM is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing maintenance, repair, and redesign requirements for legacy systems utilizing this component.

Substiute Parts

4N27VM

onsemiIn Stock: 22104N27VM Datasheet

Current PartRFQ

4N27M

onsemiIn Stock: 242064N27M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 4N27VM is determined by the following critical parameters:

• Isolation Voltage: 4170Vrms (mandatory match)
• Number of Channels: 1 (mandatory match)
• Output Type: Transistor with Base (mandatory match)
• Package / Case: 6-DIP (0.300", 7.62mm) (mandatory match)
• Input Type: DC (mandatory match)
• Current Transfer Ratio (Min): 10% @ 10mA (mandatory match)
• Turn On / Turn Off Time (Typ): 2µs, 2µs (mandatory match)
• Voltage - Output (Max): 30V (mandatory match)
• Voltage - Forward (Vf) (Typ): 1.18V (mandatory match)
• Current - DC Forward (If) (Max): 60 mA (mandatory match)
• Vce Saturation (Max): 500mV (mandatory match)
• Operating Temperature Range: -40°C ~ 100°C (mandatory match)

The 4N27M qualifies as a direct substitute, meeting all electrical and mechanical parameters while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The 4N27M is the qualified substitute for the obsolete 4N27VM. Both components share identical electrical specifications and mechanical packaging, ensuring direct functional equivalence in circuit applications.

The 4N27M carries active product status with onsemi, providing access to current manufacturing and supply chain support. The 4N27M is RoHS3 compliant, meeting modern environmental and regulatory requirements. Both parts maintain REACH Unaffected status and EAR99 export classification.

Selection between these parts should be based on availability and supply chain requirements. The 4N27M is the preferred choice for new designs and ongoing production due to its active status.

Frequently Asked Questions (FAQ)

Q: Can the 4N27M directly replace the 4N27VM in existing circuits?

A: Yes. The 4N27M meets all electrical and mechanical specifications of the 4N27VM, including isolation voltage, current transfer ratio, switching times, output voltage rating, and package configuration. Direct substitution is electrically and mechanically compatible.

Q: What is the primary difference between these parts?

A: The 4N27VM is obsolete, while the 4N27M is active. Both parts are manufactured by onsemi and share identical electrical performance. The 4N27M offers improved availability and supply chain support.

Q: Are there packaging differences between the 4N27VM and 4N27M?

A: Both parts use the same 6-DIP (0.300", 7.62mm) through-hole package. PCB layout and component placement are identical.

Q: Does the 4N27M meet current regulatory compliance standards?

A: Yes. The 4N27M is RoHS3 compliant and maintains REACH Unaffected status, meeting current environmental and regulatory requirements applicable to electronic components.

Q: What is the isolation voltage rating for these optoisolators?

A: Both the 4N27VM and 4N27M provide 4170Vrms isolation voltage, suitable for high-voltage isolation applications requiring galvanic separation between input and output circuits.