MOC3023M Optoisolator Equivalent & Substitute Parts

Part Overview

The MOC3023M is an optoisolator with triac output manufactured by Lite-On Inc., designed for galvanic isolation in AC switching applications. This component features a 5000Vrms isolation voltage rating, single-channel triac output, and 6-DIP through-hole packaging. The part is active in production with full compliance to ROHS3 standards and multiple international approvals (CQC, CSA, TUV, UL, VDE).

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances and mechanical compatibility requirements. Alternative sources and variants within the MOC302 series provide options for procurement flexibility, inventory availability, and application-specific requirements.

Substiute Parts

MOC3023M

Lite-On Inc.In Stock: 165249MOC3023M Datasheet

Current PartRFQ

MOC3023M

onsemiIn Stock: 165299MOC3023M Datasheet

DirectRFQ

MOC3020TVM

onsemiIn Stock: 2092MOC3020TVM Datasheet

MFR RecommendedRFQ

MOC3021TVM

Fairchild SemiconductorIn Stock: 12939MOC3021TVM Datasheet

MFR RecommendedRFQ

MOC3022TVM

onsemiIn Stock: 1397MOC3022TVM Datasheet

MFR RecommendedRFQ

MOC3023TVM

onsemiIn Stock: 6654MOC3023TVM Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MOC3023M is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Output Type: Triac (mandatory match)
• Number of Channels: 1 (mandatory match)
• Voltage - Isolation: Minimum 4170Vrms (acceptable reduction from 5000Vrms within industry tolerance)
• Voltage - Off State: 400V (standard across series)
• Current - LED Trigger (Ift): 5mA to 30mA range (acceptable variation)
• Current - Hold (Ih): 100µA to 250µA (acceptable variation)
• Voltage - Forward (Vf): 1.15V (standard across series)
• Current - DC Forward (If): 50mA to 60mA (acceptable variation)

Mechanical Compatibility Requirements:

• Mounting Type: Through Hole (mandatory match)
• Package / Case: 6-DIP configuration (acceptable with minor pitch variations: 0.300" or 0.400")
• Base Product Number: MOC302 series (mandatory match)

Compliance Requirements:

• RoHS Status: ROHS3 Compliant (mandatory match)
• Product Status: Active (mandatory match)

Substitute parts meeting these criteria are classified as direct electrical equivalents suitable for circuit-level replacement.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Identical Isolation Voltage):

MOC3023M (onsemi) is the closest electrical equivalent to the Lite-On MOC3023M, maintaining the same 5000Vrms isolation specification. However, the onsemi variant operates at a reduced upper temperature limit of 85°C versus 100°C. This part is suitable for applications where the Lite-On source is unavailable and thermal operating conditions remain below 85°C.

Functional Equivalents (Reduced Isolation Voltage):

MOC3023TVM (onsemi), MOC3022TVM (onsemi), MOC3020TVM (onsemi), and MOC3021TVM (Fairchild) operate at 4170Vrms isolation voltage, representing a 16.6% reduction from the primary specification. These parts are functionally equivalent for applications where the lower isolation rating is acceptable. Selection among these variants depends on LED trigger current requirements:

• MOC3023TVM: 5mA trigger current (closest match to original)
• MOC3022TVM: 10mA trigger current
• MOC3021TVM: 15mA trigger current
• MOC3020TVM: 30mA trigger current (highest trigger requirement)

All substitute parts maintain active product status and ROHS3 compliance. The onsemi variants carry IEC/EN/DIN and UL approvals. Fairchild MOC3021TVM carries IEC/EN/DIN and UL approvals with unspecified RoHS status.

Package Considerations:

The original MOC3023M (Lite-On) uses 0.300" (7.62mm) DIP pitch. The onsemi MOC3023M variant matches this pitch. All other substitutes employ 0.400" (10.16mm) DIP pitch, requiring PCB layout verification for mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can MOC3023TVM replace MOC3023M in all applications?

A: MOC3023TVM is electrically compatible for applications where 4170Vrms isolation is sufficient. The primary difference is reduced isolation voltage (16.6% lower) and maximum operating temperature of 85°C versus 100°C. PCB layout must accommodate the 0.400" DIP pitch versus the original 0.300" pitch.

Q: What is the significance of the LED trigger current (Ift) variation across substitutes?

A: LED trigger current determines the minimum input current required to activate the optoisolator. Lower values (5mA) require less input drive current, while higher values (30mA) demand stronger input signals. Circuit design must ensure the input driver can supply the required trigger current for the selected substitute.

Q: Are all substitute parts ROHS3 compliant?

A: All onsemi variants (MOC3023M, MOC3023TVM, MOC3022TVM, MOC3020TVM) are ROHS3 compliant. The Fairchild MOC3021TVM does not specify RoHS status in available documentation.

Q: What approvals do substitute parts carry?

A: The original Lite-On MOC3023M carries CQC, CSA, TUV, UL, and VDE approvals. Substitute parts carry reduced approval sets: onsemi variants carry IEC/EN/DIN and UL approvals; Fairchild MOC3021TVM carries IEC/EN/DIN and UL approvals. Application-specific regulatory requirements must be evaluated against available certifications.

Q: Can I use MOC3020TVM as a direct replacement?

A: MOC3020TVM is mechanically and electrically compatible but requires 30mA LED trigger current versus 5mA for the original. This significantly increases input drive requirements. Use only if the input circuit can supply 30mA and the application tolerates the 4170Vrms isolation rating.

Q: How does the hold current (Ih) difference affect circuit operation?

A: The original MOC3023M specifies 250µA typical hold current; all substitutes specify 100µA typical. Lower hold current reduces power consumption in the triac output stage. This difference is generally transparent to circuit operation but may affect minimum holding current margins in marginal designs.

Q: What is the impact of operating temperature range reduction?

A: The original part operates to 100°C; substitutes operate to 85°C maximum. Applications requiring operation above 85°C must use the original Lite-On MOC3023M or evaluate alternative optoisolator families with higher temperature ratings.