MOC3031FR2M Equivalent & Substitute Parts

Part Overview

The MOC3031FR2M is an optoisolator with triac output manufactured by onsemi, designed for applications requiring galvanic isolation up to 7500Vpk with a single-channel triac output and integrated zero-crossing circuit. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement planning. The part is supplied in 6-SMD, Gull Wing surface mount packaging with unlimited moisture sensitivity level (MSL 1).

Substiute Parts

MOC3031FR2M

onsemiIn Stock: 782MOC3031FR2M Datasheet

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MOC3031SR2M

onsemiIn Stock: 2144MOC3031SR2M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete MOC3031FR2M is based on the following critical parameters that must remain compatible:

• Output Type: Triac output configuration
• Zero Crossing Circuit: Integrated zero-crossing detection
• Number of Channels: Single channel
• Voltage - Off State: 250 V maximum
• Current - LED Trigger (Ift): 15mA maximum
• Current - Hold (Ih): 400µA typical
• Current - DC Forward (If): 60 mA maximum
• Mounting Type: Surface Mount
• Package / Case: 6-SMD, Gull Wing
• Moisture Sensitivity Level: MSL 1

The MOC3031SR2M qualifies as a substitute part. While the isolation voltage specification differs (4170Vrms versus 7500Vpk), all other functional and mechanical parameters align with the original part's requirements. The MOC3031SR2M maintains identical channel count, output type, zero-crossing functionality, trigger current, hold current, forward current ratings, and physical packaging.

Parameter Comparison

Engineering Selection Recommendations

The MOC3031SR2M is the designated substitute for the obsolete MOC3031FR2M. The MOC3031SR2M carries Active product status, ensuring continued availability and manufacturing support. The part is RoHS3 compliant and carries UL approval agency certification, providing enhanced regulatory compliance compared to the original part. Both components share identical mechanical packaging (6-SMD, Gull Wing) and are compatible with existing PCB layouts and assembly processes. The MOC3031SR2M is available in Tape & Reel (TR) packaging format, supporting automated assembly workflows.

Frequently Asked Questions (FAQ)

Q: Can the MOC3031SR2M directly replace the MOC3031FR2M in existing designs?

A: Yes. Both parts maintain identical output type (triac), channel count (1), zero-crossing circuit functionality, trigger current (15mA max), hold current (400µA typ), forward current (60mA max), off-state voltage (250V), and physical packaging (6-SMD, Gull Wing). The isolation voltage specification differs, but all functional and mechanical parameters required for substitution are equivalent.

Q: What is the difference in isolation voltage between these parts?

A: The MOC3031FR2M specifies 7500Vpk isolation voltage, while the MOC3031SR2M specifies 4170Vrms isolation voltage. These represent different measurement standards (peak versus RMS) for the same isolation barrier capability. Both parts meet the 250V off-state voltage requirement.

Q: Are there packaging differences between the MOC3031FR2M and MOC3031SR2M?

A: Both parts use identical 6-SMD, Gull Wing surface mount packaging. The MOC3031SR2M is supplied in Tape & Reel (TR) format, which is standard for automated assembly. No PCB layout modifications are required for substitution.

Q: What compliance certifications does the MOC3031SR2M carry?

A: The MOC3031SR2M is RoHS3 compliant and carries UL approval agency certification. Both parts maintain REACH Unaffected status and EAR99 export classification.

Q: Is the MOC3031SR2M currently in production?

A: Yes. The MOC3031SR2M carries Active product status, ensuring ongoing manufacturing support and availability. The original MOC3031FR2M is classified as Obsolete.