MOC3020TM Equivalent & Substitute Parts

Part Overview

The MOC3020TM is a 4170Vrms optoisolator with triac output manufactured by onsemi in a 6-DIP through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The MOC3020TM serves as a triac-output optocoupler for AC load switching applications requiring galvanic isolation.

Substiute Parts

MOC3020TM

onsemiIn Stock: 34130MOC3020TM Datasheet

Current PartRFQ

MOC3020TVM

onsemiIn Stock: 2092MOC3020TVM Datasheet

DirectRFQ

IS3020

Isocom Components 2004 LTDIn Stock: 45237IS3020 Datasheet

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IS3021

Isocom Components 2004 LTDIn Stock: 45365IS3021 Datasheet

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IS3022

Isocom Components 2004 LTDIn Stock: 45455IS3022 Datasheet

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MOC3020G

Isocom Components 2004 LTDIn Stock: 1142MOC3020G Datasheet

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MOC3020M

Fairchild SemiconductorIn Stock: 78475MOC3020M Datasheet

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MOC3021G

Isocom Components 2004 LTDIn Stock: 1174MOC3021G Datasheet

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MOC3022G

Isocom Components 2004 LTDIn Stock: 1031MOC3022G Datasheet

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MOC3023G

Isocom Components 2004 LTDIn Stock: 1193MOC3023G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MOC3020TM is determined by the following critical parameters: output type (triac), number of channels (1), package type (6-DIP through-hole), isolation voltage rating, off-state voltage, LED trigger current, hold current, forward voltage, forward current, and operating temperature range.

Substitute parts are grouped into two categories:

Direct Equivalent: MOC3020TVM maintains identical electrical specifications and package dimensions as the MOC3020TM. The primary difference is packaging format (tube vs. unspecified) and active product status.

Similar Alternatives: IS3020, IS3021, IS3022, MOC3020G, MOC3020M, MOC3021G, MOC3022G, and MOC3023G share the same functional output type (triac), single-channel configuration, through-hole mounting, and 6-DIP package footprint. These parts differ in isolation voltage rating, LED trigger current specifications, and operating temperature range, but remain functionally compatible for applications where these parameter variations are acceptable.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: MOC3020TVM is the direct equivalent for MOC3020TM replacement. Both parts share identical electrical specifications, package dimensions (6-DIP 0.400"), and isolation voltage (4170Vrms). MOC3020TVM is active in production and ROHS3 compliant, providing design continuity with no circuit modifications required.

Alternative Selection Criteria:

For applications where isolation voltage exceeds 4170Vrms, IS3020, IS3021, or IS3022 provide 5300Vrms isolation. These parts use a narrower 6-DIP package (0.300" vs. 0.400"), requiring PCB layout verification for pin spacing compatibility. Operating temperature range extends to 100°C.

For applications requiring lower LED trigger current, IS3022 (10mA), MOC3022G (10mA), or MOC3023G (5mA) reduce input drive requirements. MOC3020G, MOC3021G, and MOC3022G maintain the 0.400" package width and support UL/VDE certifications.

MOC3020M (Fairchild Semiconductor) is listed as active but with incomplete specification data; verification against application requirements is necessary before selection.

All substitute parts maintain triac output configuration, single-channel design, through-hole mounting, and 100µA typical hold current. Forward current specifications vary (50mA vs. 60mA maximum), requiring input circuit current budget review.

Frequently Asked Questions (FAQ)

Q: Can MOC3020TVM directly replace MOC3020TM without circuit modification?

A: Yes. MOC3020TVM is electrically and mechanically identical to MOC3020TM. Both feature 4170Vrms isolation, 6-DIP 0.400" package, 30mA maximum LED trigger current, and -40°C to 85°C operating range. No design changes are required.

Q: What is the primary difference between MOC3020TM and IS3020?

A: Isolation voltage differs: MOC3020TM provides 4170Vrms while IS3020 provides 5300Vrms. IS3020 uses a narrower 6-DIP package (0.300" vs. 0.400"), which may affect PCB footprint compatibility. IS3020 also supports extended operating temperature to 100°C.

Q: Are the Isocom MOC302x series parts (MOC3020G, MOC3021G, MOC3022G, MOC3023G) compatible with MOC3020TM?

A: These parts share the same 6-DIP 0.400" package and triac output configuration. However, isolation voltage is specified as 7.5Vpk rather than 4170Vrms, representing a significant difference in isolation rating. LED trigger current varies across the series (30mA, 15mA, 10mA, 5mA). Application-specific isolation requirements must be verified before substitution.

Q: What does the difference in LED trigger current (Ift) mean for circuit design?

A: LED trigger current determines the minimum input current required to activate the triac output. MOC3020TM requires 30mA maximum; IS3022 and MOC3022G require 10mA; MOC3023G requires 5mA. Lower trigger current reduces input drive circuit power consumption and component stress. Input circuit design must supply sufficient current to meet the selected part's specification.

Q: Are all substitute parts RoHS compliant?

A: MOC3020TVM and all Isocom parts listed are ROHS3 compliant. MOC3020TM compliance status is not specified. MOC3020M (Fairchild) compliance information is not provided in available data.

Q: Does package width affect PCB compatibility?

A: Yes. MOC3020TM, MOC3020TVM, and Isocom MOC302x series use 6-DIP 0.400" width. IS3020, IS3021, and IS3022 use 6-DIP 0.300" width. Narrower packages require PCB layout verification to confirm pin spacing compatibility with existing footprints before substitution.

Q: What certifications apply to these parts?

A: MOC3020TM carries UL approval. MOC3020TVM carries IEC/EN/DIN and UL approvals. Isocom MOC302x series (MOC3020G, MOC3021G, MOC3022G, MOC3023G) carry UL and VDE approvals. IS3020, IS3021, and IS3022 do not list approval agencies. Application-specific certification requirements must be verified.