MOC3081FR2VM Equivalent & Substitute Parts

Part Overview

The MOC3081FR2VM is an optoisolator with triac output manufactured by onsemi, designed for applications requiring galvanic isolation with triac switching capability. This component features 7500Vpk isolation voltage and is packaged in 6-SMD, Gull Wing surface mount configuration. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

MOC3081FR2VM

onsemiIn Stock: 1091MOC3081FR2VM Datasheet

Current PartRFQ

MOC3081SR2VM

onsemiIn Stock: 2376MOC3081SR2VM Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MOC3081FR2VM is determined by the following critical parameters:

• Output Type: Must be Triac output for functional equivalence
• Number of Channels: Must be 1 channel
• Zero Crossing Circuit: Must include zero crossing detection
• Package / Case: Must be 6-SMD, Gull Wing for mechanical compatibility
• Mounting Type: Must be Surface Mount
• Voltage - Isolation: Substitute must meet or exceed 7500Vpk isolation requirement
• Current Specifications: LED trigger current (Ift), hold current (Ih), and forward current (If) must be compatible with circuit design parameters
• Voltage - Off State: Must support 800 V off-state voltage rating

The MOC3081SR2VM qualifies as a substitute based on matching output type, channel count, zero crossing capability, package configuration, and mounting type. However, the isolation voltage specification differs: MOC3081SR2VM provides 4170Vrms isolation, which is lower than the MOC3081FR2VM's 7500Vpk specification.

Parameter Comparison

Engineering Selection Recommendations

The MOC3081SR2VM is the designated substitute for the obsolete MOC3081FR2VM based on product availability and active manufacturing status. Both components share identical mechanical packaging (6-SMD, Gull Wing), functional output type (Triac), channel configuration (1 channel), and zero crossing circuit capability.

The MOC3081SR2VM provides additional engineering advantages: it is ROHS3 compliant, carries IEC/EN/DIN and UL approvals, and includes specified operating temperature range (-40°C ~ 85°C) and static dV/dt rating (600V/µs). These specifications support modern design standards and regulatory requirements.

The primary design consideration is the isolation voltage specification. The MOC3081FR2VM specifies 7500Vpk isolation, while the MOC3081SR2VM specifies 4170Vrms isolation. Applications requiring the higher isolation voltage of the original part must evaluate whether the substitute's isolation rating meets circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can MOC3081SR2VM directly replace MOC3081FR2VM in existing designs?

A: Mechanical and functional compatibility is confirmed. Both components use identical 6-SMD, Gull Wing packaging and share triac output configuration with zero crossing detection. Electrical parameter compatibility depends on circuit isolation voltage requirements. The isolation voltage difference must be evaluated against application specifications.

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

A: MOC3081FR2VM specifies 7500Vpk isolation voltage. MOC3081SR2VM specifies 4170Vrms isolation voltage. These are different measurement standards (peak versus RMS). Circuit design isolation requirements must be compared against both specifications to determine suitability.

Q: Are there compliance or certification differences?

A: MOC3081SR2VM carries IEC/EN/DIN and UL approvals and is ROHS3 compliant. The MOC3081FR2VM specifications do not include these certifications in the provided data. Applications requiring specific regulatory compliance should confirm MOC3081SR2VM meets all necessary standards.

Q: Is MOC3081SR2VM currently available?

A: Yes. MOC3081SR2VM is listed as Active product status with 2361 pieces in stock. MOC3081FR2VM is obsolete and no longer in production.

Q: Are the current specifications identical?

A: Yes. Both components specify 15mA maximum LED trigger current (Ift), 500µA typical hold current (Ih), and 60mA maximum DC forward current (If). These parameters are fully compatible.

Q: What is the package compatibility?

A: Both components use 6-SMD, Gull Wing surface mount packaging. PCB footprints and assembly processes are identical. No layout or manufacturing changes are required for package substitution.