MOC3023FM Optoisolator Equivalent & Substitute Parts

Part Overview

The MOC3023FM is a 7.5kV isolation optoisolator with triac output manufactured by onsemi in a 6-SMD surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The MOC3023FM serves applications requiring high-voltage isolation with triac switching capability, commonly found in AC power control circuits, motor control, and industrial switching applications.

Substiute Parts

MOC3023FM

onsemiIn Stock: 1249MOC3023FM Datasheet

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MOC3023SM

onsemiIn Stock: 1460MOC3023SM Datasheet

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EL3021

Everlight Electronics Co LtdIn Stock: 66589EL3021 Datasheet

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EL3022

Everlight Electronics Co LtdIn Stock: 24994EL3022 Datasheet

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EL3023

Everlight Electronics Co LtdIn Stock: 83402EL3023 Datasheet

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IS3020G

Isocom Components 2004 LTDIn Stock: 751IS3020G Datasheet

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IS3021G

Isocom Components 2004 LTDIn Stock: 1143IS3021G Datasheet

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IS3022G

Isocom Components 2004 LTDIn Stock: 863IS3022G Datasheet

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MOC3020

onsemiIn Stock: 19292MOC3020 Datasheet

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MOC3021

onsemiIn Stock: 247566MOC3021 Datasheet

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MOC3022

onsemiIn Stock: 67862MOC3022 Datasheet

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MOC3023

onsemiIn Stock: 231621MOC3023 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MOC3023FM is determined by the following critical parameters:

Isolation Voltage Compatibility: The MOC3023FM provides 7500Vpk isolation. Substitute parts must maintain isolation voltage at or above this level to ensure equivalent safety margins in high-voltage applications.

Output Type: All substitutes must feature triac output to maintain functional equivalence in AC switching circuits.

Trigger Current (Ift): The MOC3023FM requires 5mA maximum LED trigger current. Substitutes with equal or lower Ift values ensure compatible drive circuit requirements.

Current Ratings: Forward current (If) and hold current (Ih) must be compatible with the application's load switching requirements.

Mounting and Package: The MOC3023FM uses surface mount 6-SMD packaging. Substitutes may include through-hole alternatives (6-DIP) for applications permitting package changes, or surface mount variants for direct PCB replacement.

Product Status: Active product status is preferred for long-term availability, though obsolete alternatives may serve legacy system repairs.

Substitutes are grouped into two categories: direct surface mount replacements (MOC3023SM) and functional equivalents with different packaging (EL series, IS series, MOC3020/3021/3022).

Parameter Comparison

Engineering Selection Recommendations

Direct Surface Mount Replacement: MOC3023SM is the primary substitute for MOC3023FM when surface mount packaging is required. Both use 6-SMD gull wing packages and are manufactured by onsemi. MOC3023SM is active product status, ensuring long-term availability. The isolation voltage of MOC3023SM (4170Vrms) is lower than MOC3023FM (7500Vpk), requiring design review for applications demanding the full 7500Vpk isolation margin.

Through-Hole Alternatives with Equivalent Isolation: EL3023, IS3021G, and MOC3021 provide 5000Vrms to 5300Vrms isolation with 5mA to 15mA trigger current, suitable for applications where package conversion from surface mount to through-hole is acceptable. EL3023 and IS3021G carry active product status with ROHS3 compliance. MOC3021 is obsolete but maintains high inventory availability.

Lower Trigger Current Options: EL3023 and MOC3023SM both specify 5mA maximum trigger current, matching the MOC3023FM requirement exactly. These are preferred when drive circuit current budgets are constrained.

Higher Isolation Voltage Requirement: If applications require isolation voltage exceeding 5300Vrms, no direct substitute exists within the provided list. MOC3023FM remains the only option with 7500Vpk isolation.

Compliance Considerations: MOC3023SM, EL series, and IS series all carry ROHS3 compliance or equivalent certifications. Obsolete parts (MOC3020, MOC3021, MOC3022) lack specified RoHS status and should be used only for legacy system maintenance.

Frequently Asked Questions (FAQ)

Q: Can MOC3023SM directly replace MOC3023FM on the same PCB?

A: Yes, both use 6-SMD gull wing surface mount packages with identical pinouts. However, the isolation voltage differs (4170Vrms vs 7500Vpk). Verify that your application's isolation requirements do not exceed 4170Vrms before substitution.

Q: What is the difference between Vpk and Vrms isolation ratings?

A: Vpk (peak voltage) and Vrms (RMS voltage) represent different measurement standards for isolation voltage. The MOC3023FM rating of 7500Vpk is approximately equivalent to 5300Vrms. Substitutes rated at 5000Vrms to 5300Vrms provide lower isolation margins than the original part.

Q: Can I use a through-hole DIP package substitute in place of the surface mount MOC3023FM?

A: Through-hole substitutes (EL3021, EL3022, EL3023, MOC3020, MOC3021, MOC3022) require PCB redesign to accommodate different footprints and pin spacing. This is not a direct replacement but a functional alternative for new board layouts.

Q: Which substitute has the lowest LED trigger current requirement?

A: MOC3023SM and EL3023 both specify 5mA maximum trigger current, matching the MOC3023FM. These are optimal for low-power drive circuits.

Q: Are there active product substitutes available?

A: Yes. MOC3023SM, EL3021, EL3022, EL3023, IS3020G, IS3021G, and IS3022G all carry active product status. These are recommended for new designs requiring long-term component availability.

Q: What is the difference between IS3020G, IS3021G, and IS3022G?

A: These Isocom parts differ only in LED trigger current: IS3020G requires 30mA, IS3021G requires 15mA, and IS3022G requires 10mA. All provide 5300Vrms isolation and 100µA hold current. Selection depends on available drive current in your circuit.

Q: Can MOC3023FM be used in new production designs?

A: No. MOC3023FM is classified as obsolete. New designs should use active alternatives such as MOC3023SM (surface mount) or EL3023/IS3021G (through-hole).