4N30SM Optoisolator Equivalent & Substitute Parts

Part Overview

The 4N30SM is an optoisolator with Darlington output and base connection, manufactured by onsemi. This component provides 4170Vrms isolation voltage in a 6-SMD surface mount package. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity for applications requiring optoisolation with Darlington output configuration.

Substiute Parts

4N30SM

onsemiIn Stock: 222214N30SM Datasheet

Current PartRFQ

MCA2230SM

Isocom Components 2004 LTDIn Stock: 971MCA2230SM Datasheet

SimilarRFQ

MCA2231SM

Isocom Components 2004 LTDIn Stock: 809MCA2231SM Datasheet

SimilarRFQ

4N30SM

Fairchild SemiconductorIn Stock: 222494N30SM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 4N30SM are classified into two categories based on electrical and mechanical compatibility:

Similar Manufacturer Parts (MCA2230SM, MCA2231SM): These Isocom Components optoisolators share the same 6-SMD surface mount package, Darlington with base output configuration, and core electrical characteristics. The primary differences are higher isolation voltage (5300Vrms vs. 4170Vrms), extended operating temperature range (-55°C to 100°C vs. -40°C to 100°C), and in the case of MCA2231SM, higher current transfer ratio (500% vs. 100%). These parts are suitable for applications where higher isolation voltage or wider temperature range provides design margin.

Parametric Equivalent (4N30SM by Fairchild Semiconductor): This part shares identical electrical specifications and package configuration with the onsemi 4N30SM, providing direct functional equivalence from a different manufacturer source.

Substitution eligibility is determined by:

• Matching package type (6-SMD, Gull Wing)
• Matching output configuration (Darlington with Base)
• Isolation voltage equal to or greater than required
• Output voltage and current ratings meeting or exceeding application requirements
• Operating temperature range encompassing application conditions
• Compliance certifications (RoHS3, REACH)

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The 4N30SM from Fairchild Semiconductor provides identical electrical and mechanical specifications with full RoHS3 compliance, suitable for one-to-one substitution in existing designs.

For Enhanced Isolation Margin: MCA2230SM and MCA2231SM offer 5300Vrms isolation voltage, providing 27% higher isolation rating than the primary 4N30SM. Both parts maintain RoHS3 compliance and support the extended temperature range of -55°C to 100°C. MCA2230SM matches the 100% current transfer ratio of the primary part, while MCA2231SM provides 500% current transfer ratio for applications requiring higher output drive capability.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity level remains at MSL 1 (Unlimited) across all options, eliminating bake-out requirements for storage and handling.

Frequently Asked Questions (FAQ)

Q: Can MCA2230SM and MCA2231SM be used interchangeably with 4N30SM?

A: Yes, both Isocom parts are mechanically and functionally compatible. They share the 6-SMD package, Darlington with base output, and core electrical characteristics. The primary differences are higher isolation voltage (5300Vrms vs. 4170Vrms) and extended operating temperature range (-55°C to 100°C). MCA2231SM additionally provides higher current transfer ratio (500% vs. 100%).

Q: What is the difference between MCA2230SM and MCA2231SM?

A: Both parts are identical except for current transfer ratio. MCA2230SM provides 100% @ 10mA, matching the primary 4N30SM specification. MCA2231SM provides 500% @ 10mA, offering five times higher current transfer ratio for applications requiring greater output drive capability.

Q: Are there any package or pinout differences between these parts?

A: No. All parts use the 6-SMD, Gull Wing surface mount package with identical mechanical specifications, supporting direct PCB layout compatibility.

Q: Do these substitute parts require different handling or storage procedures?

A: No. All parts maintain MSL 1 (Unlimited) moisture sensitivity level, eliminating special bake-out or dry storage requirements.

Q: Which substitute part should I select for a new design?

A: Selection depends on application requirements. For designs requiring standard isolation voltage and current transfer ratio, MCA2230SM provides direct functional equivalence. For applications requiring higher isolation margin or extended temperature operation, MCA2230SM or MCA2231SM are appropriate. For applications requiring maximum output drive capability, MCA2231SM is recommended.