MOC3012TM Optoisolator Triac Output Equivalent & Substitute Parts

Part Overview

The MOC3012TM is a 4170Vrms isolation optoisolator with triac output manufactured by onsemi in 6-DIP through-hole packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The MOC3012TM serves applications requiring galvanic isolation with random-phase triac switching capability in industrial control and power management circuits.

Key Parameters

Parameter	MOC3012TM Value
Manufacturer	onsemi
Output Type	Triac
Voltage - Isolation	4170Vrms
Voltage - Off State	250 V
Number of Channels	1
Current - LED Trigger (Ift) (Max)	5mA
Current - Hold (Ih)	100µA (Typ)
Voltage - Forward (Vf) (Typ)	1.15V
Current - DC Forward (If) (Max)	60 mA
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	6-DIP (0.400", 10.16mm)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the MOC3012TM is determined by the following critical parameters:

Output Type: Triac (mandatory match)
Package / Case: 6-DIP (0.400", 10.16mm) (mandatory match for PCB compatibility)
Mounting Type: Through Hole (mandatory match)
Voltage - Isolation: Minimum 4170Vrms (equal or higher acceptable)
Voltage - Off State: 250 V (standard across all candidates)
Current - LED Trigger (Ift) (Max): 5mA specification (equal or lower trigger current acceptable)
Number of Channels: 1 (mandatory match)

Substitute parts are grouped into two categories:

Direct Substitute (Active Status): MOC3012TVM from Fairchild Semiconductor maintains identical electrical specifications and packaging, providing direct replacement capability.

Compatible Alternatives (Enhanced Specifications): Everlight Electronics (EL3010M, EL3011M, EL3012M) and Isocom Components (H11J1G, H11J2G, H11J3G, H11J4G, H11J5G, MOC3009G) offer higher isolation voltage ratings (5000Vrms to 5300Vrms) and extended temperature ranges, suitable for applications requiring enhanced performance margins.

Parameter Comparison

Part Number	Manufacturer	Voltage - Isolation	Voltage - Off State	Current - LED Trigger (Ift) (Max)	Current - Hold (Ih)	Voltage - Forward (Vf) (Typ)	Current - DC Forward (If) (Max)	Operating Temperature	Package / Case	Product Status
MOC3012TM	onsemi	4170Vrms	250 V	5mA	100µA (Typ)	1.15V	60 mA	-40°C ~ 85°C	6-DIP (0.400", 10.16mm)	Obsolete
MOC3012TVM	Fairchild Semiconductor	4170Vrms	250 V	5mA	100µA (Typ)	1.15V	60 mA	-40°C ~ 85°C	6-DIP (0.400", 10.16mm)	Active
EL3010M	Everlight Electronics Co Ltd	5000Vrms	250 V	15mA	250µA (Typ)	1.18V	60 mA	-55°C ~ 100°C	6-DIP (0.400", 10.16mm)	Active
EL3011M	Everlight Electronics Co Ltd	5000Vrms	250 V	10mA	250µA (Typ)	1.18V	60 mA	-55°C ~ 100°C	6-DIP (0.400", 10.16mm)	Active
EL3012M	Everlight Electronics Co Ltd	5000Vrms	250 V	5mA	250µA (Typ)	1.18V	60 mA	-55°C ~ 100°C	6-DIP (0.400", 10.16mm)	Active
H11J1G	Isocom Components 2004 LTD	5300Vrms	250 V	10mA	100µA (Typ)	1.2V	50 mA	-40°C ~ 100°C	6-DIP (0.400", 10.16mm)	Active
H11J2G	Isocom Components 2004 LTD	5300Vrms	250 V	15mA	100µA (Typ)	1.2V	50 mA	-40°C ~ 100°C	6-DIP (0.400", 10.16mm)	Active
H11J3G	Isocom Components 2004 LTD	5300Vrms	250 V	10mA	100µA (Typ)	1.2V	50 mA	-40°C ~ 100°C	6-DIP (0.400", 10.16mm)	Active
H11J4G	Isocom Components 2004 LTD	5300Vrms	250 V	15mA	100µA (Typ)	1.2V	50 mA	-40°C ~ 100°C	6-DIP (0.400", 10.16mm)	Active
H11J5G	Isocom Components 2004 LTD	5300Vrms	250 V	25mA	100µA (Typ)	1.2V	50 mA	-40°C ~ 100°C	6-DIP (0.400", 10.16mm)	Active
MOC3009G	Isocom Components 2004 LTD	5300Vrms	250 V	30mA	100µA	1.2V	50 mA	-40°C ~ 100°C	6-DIP (0.400", 10.16mm)	Active

Engineering Selection Recommendations

Primary Recommendation: MOC3012TVM (Fairchild Semiconductor) is the direct substitute for MOC3012TM. It maintains identical electrical specifications, packaging, and thermal operating range. This part is in active production status with UL and IEC/EN/DIN approvals, ensuring supply continuity and compliance equivalence.

Secondary Recommendations: Everlight Electronics EL3012M provides the closest alternative among enhanced-specification options, matching the 5mA LED trigger current specification while offering higher isolation voltage (5000Vrms) and extended temperature range (-55°C ~ 100°C). This part carries ROHS3 compliance and multi-agency approvals (CSA, DEMKO, FIMKO, NEMKO, SEMKO, UL).

Alternative Options: Isocom Components H11J3G and H11J1G offer 5300Vrms isolation with 10mA trigger current specifications. These parts maintain the 100µA hold current characteristic of the original MOC3012TM and support extended temperature operation (-40°C ~ 100°C). Both carry UL and VDE approvals with ROHS3 compliance.

Selection among alternatives depends on circuit requirements for isolation voltage margin, trigger current tolerance, and operating temperature range. All recommended substitutes maintain 6-DIP through-hole packaging and single-channel triac output configuration.

Frequently Asked Questions (FAQ)

Q: Can MOC3012TVM be used as a direct replacement for MOC3012TM?

A: Yes. MOC3012TVM maintains identical isolation voltage (4170Vrms), trigger current (5mA maximum), hold current (100µA typical), forward voltage (1.15V typical), and operating temperature range (-40°C ~ 85°C). Package and pinout are identical 6-DIP through-hole. The part is in active production status.

Q: What is the difference between MOC3012TM and the Everlight EL3012M?

A: EL3012M offers higher isolation voltage (5000Vrms vs. 4170Vrms) and extended temperature range (-55°C ~ 100°C vs. -40°C ~ 85°C). LED trigger current specification is identical at 5mA maximum. Hold current is higher (250µA typical vs. 100µA typical). Package and output type are identical. EL3012M is suitable for applications requiring enhanced isolation margins or wider temperature operation.

Q: Are Isocom H11J series parts compatible with MOC3012TM?

A: H11J series parts (H11J1G, H11J3G, H11J4G, H11J5G) are compatible in terms of package (6-DIP), output type (triac), and isolation voltage (5300Vrms, exceeding MOC3012TM requirement). Key differences are LED trigger current specifications (10mA to 25mA depending on variant) and DC forward current (50mA vs. 60mA). Selection depends on circuit tolerance for trigger current and forward current requirements.

Q: What packaging considerations apply to all substitute parts?

A: All substitute parts listed maintain 6-DIP (0.400", 10.16mm) through-hole packaging, ensuring direct PCB footprint compatibility with MOC3012TM designs. No layout modifications are required for mechanical fit.

Q: Which substitute part offers the best compliance coverage?

A: MOC3012TVM carries IEC/EN/DIN and UL approvals. Everlight EL3012M carries CSA, DEMKO, FIMKO, NEMKO, SEMKO, and UL approvals. Isocom H11J series and MOC3009G carry UL and VDE approvals with ROHS3 compliance. Selection depends on specific regulatory requirements for the target application.

Q: Can I use a higher isolation voltage rated part as a substitute?

A: Yes. Parts rated for higher isolation voltage (5000Vrms or 5300Vrms) exceed the MOC3012TM requirement of 4170Vrms and are suitable for direct substitution. Higher isolation voltage provides additional safety margin in high-voltage isolation applications. Verify that other electrical parameters (trigger current, hold current, forward voltage) are compatible with circuit design.

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