MOC3012SR2VM Equivalent & Substitute Parts

Part Overview

The MOC3012SR2VM is an optoisolator with triac output manufactured by onsemi, designed for high-voltage isolation applications requiring 4170Vrms isolation rating. This component features a single channel configuration in a 6-SMD surface mount package. The product is currently obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

MOC3012SR2VM

onsemiIn Stock: 1117MOC3012SR2VM Datasheet

Current PartRFQ

MOC3021S-TA1

Lite-On Inc.In Stock: 100202MOC3021S-TA1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MOC3012SR2VM is determined by the following critical parameters:

• Output Type: Must be Triac output optoisolator
• Number of Channels: Must be single channel (1)
• Mounting Type: Must be Surface Mount
• Package Configuration: Must be 6-SMD, Gull Wing
• Isolation Voltage: Substitute must meet or exceed 4170Vrms
• Operating Temperature Range: Substitute must support -40°C minimum and 85°C maximum
• Moisture Sensitivity: MSL rating of 1 or better

The MOC3021S-TA1 manufactured by Lite-On Inc. qualifies as a substitute based on these parameters. It maintains identical package geometry, mounting type, and channel configuration while providing enhanced isolation voltage (5000Vrms) and extended temperature range support.

Parameter Comparison

Engineering Selection Recommendations

The MOC3021S-TA1 is suitable as a substitute for the obsolete MOC3012SR2VM based on the following factors:

Compliance and Certification: The MOC3021S-TA1 holds active product status with certifications including CQC, CSA, TUV, UL, and VDE, compared to the MOC3012SR2VM's IEC/EN/DIN and UL approvals. Both components maintain REACH Unaffected status and EAR99 ECCN classification.

Electrical Compatibility: The substitute provides higher isolation voltage (5000Vrms versus 4170Vrms), which exceeds the original specification. The off-state voltage increases from 250V to 400V. LED trigger current requirement increases from 5mA to 15mA, and hold current increases from 100µA to 250µA. Forward voltage remains identical at 1.15V typical.

Thermal Performance: The MOC3021S-TA1 extends the upper operating temperature limit to 100°C, compared to 85°C for the original part, while maintaining the -40°C lower limit.

Package Compatibility: Both components utilize identical 6-SMD gull wing surface mount packaging, ensuring direct PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can the MOC3021S-TA1 directly replace the MOC3012SR2VM on existing PCBs?

A: Yes. Both components share identical 6-SMD gull wing package geometry and mounting type, allowing direct PCB footprint compatibility without layout modifications.

Q: What are the key electrical differences between these parts?

A: The MOC3021S-TA1 provides higher isolation voltage (5000Vrms versus 4170Vrms) and higher off-state voltage (400V versus 250V). LED trigger current requirement increases from 5mA to 15mA, and hold current increases from 100µA to 250µA. Forward voltage remains at 1.15V for both parts.

Q: Does the increased LED trigger current requirement affect circuit design?

A: The higher trigger current (15mA versus 5mA) must be accommodated by the input drive circuit. Existing designs operating at 5mA will require current source adjustment to ensure reliable operation at the substitute part's 15mA specification.

Q: Are there temperature range considerations for substitution?

A: The MOC3021S-TA1 supports operation to 100°C, exceeding the MOC3012SR2VM's 85°C maximum. Both maintain -40°C minimum operating temperature. Applications limited to 85°C operation remain compatible.

Q: What is the product status difference between these components?

A: The MOC3012SR2VM is obsolete, while the MOC3021S-TA1 maintains active product status with current manufacturing and availability.

Q: Are both components RoHS compliant?

A: The MOC3012SR2VM does not specify RoHS status in available documentation. The MOC3021S-TA1 is ROHS3 compliant.