MOC3043FR2VM Equivalent & Substitute Parts

Part Overview

The MOC3043FR2VM is an optoisolator with triac output manufactured by onsemi, designed for high-voltage isolation applications. This component features a 7500Vpk isolation rating and zero-crossing detection circuit in a 6-SMD surface mount package. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

MOC3043FR2VM

onsemiIn Stock: 950MOC3043FR2VM Datasheet

Current PartRFQ

MOC3043SR2VM

onsemiIn Stock: 23640MOC3043SR2VM Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MOC3043FR2VM is determined by the following critical parameters:

• Output Type: Triac output configuration
• Isolation Voltage: Minimum 7500Vpk or equivalent rms rating
• Zero Crossing Detection: Required for synchronized switching applications
• Number of Channels: Single channel
• Package Compatibility: 6-SMD, Gull Wing surface mount
• Current Specifications: LED trigger current (5mA max), hold current (400µA typ), forward current (60mA max)
• Off-State Voltage Rating: 400V minimum

The MOC3043SR2VM qualifies as a substitute based on matching output type, zero-crossing circuit, channel count, package format, and current specifications. However, the isolation voltage differs between the main part and substitute, requiring evaluation against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The MOC3043SR2VM is the primary substitute for the obsolete MOC3043FR2VM. Both components share the same base product number (MOC304) and are manufactured by onsemi. The substitute maintains functional equivalence in output type, zero-crossing detection, channel configuration, and current specifications.

The MOC3043SR2VM holds active product status with IEC/EN/DIN and UL approval certifications, providing design continuity for applications requiring regulatory compliance. The component is RoHS3 compliant and REACH unaffected, meeting current environmental standards.

The primary distinction is the isolation voltage rating: the MOC3043FR2VM specifies 7500Vpk while the MOC3043SR2VM specifies 4170Vrms. Applications requiring the higher isolation voltage of the original part must evaluate whether the substitute's isolation rating is sufficient for the intended circuit design.

Frequently Asked Questions (FAQ)

Q: Can MOC3043SR2VM directly replace MOC3043FR2VM in all applications?

A: Direct replacement is possible for applications where the isolation voltage requirement does not exceed 4170Vrms. The substitute maintains identical output type, zero-crossing circuit, package format, and current specifications. Applications requiring 7500Vpk isolation must confirm that 4170Vrms meets the design specification.

Q: What is the difference between 7500Vpk and 4170Vrms isolation ratings?

A: These represent different measurement standards for isolation voltage. Peak voltage (Vpk) and RMS voltage (Vrms) are distinct metrics. The application circuit design determines which specification applies. Consult the specific application requirements and circuit topology to determine compatibility.

Q: Are the packages identical between these parts?

A: Both components use 6-SMD, Gull Wing surface mount packaging. The MOC3043FR2VM is supplied in standard packaging, while the MOC3043SR2VM is supplied in Tape & Reel (TR) format. The physical package dimensions and pin configuration are identical; the difference is in the delivery format.

Q: What certifications does the substitute part carry?

A: The MOC3043SR2VM carries IEC/EN/DIN and UL approvals and is RoHS3 compliant. The original MOC3043FR2VM does not specify approval agencies in the provided data. The substitute's certifications support applications requiring regulatory compliance.

Q: Is the MOC3043SR2VM available in inventory?

A: The MOC3043SR2VM is listed as active product status with 23,600 pieces in new original stock, providing immediate availability for production requirements.