MOC3033FR2M Equivalent & Substitute Parts

Part Overview

The MOC3033FR2M is an optoisolator with triac output manufactured by onsemi, designed for applications requiring galvanic isolation up to 7500Vpk with zero-crossing detection capability. This component features a single channel configuration 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

MOC3033FR2M

onsemiIn Stock: 816MOC3033FR2M Datasheet

Current PartRFQ

MOC3033SR2M

onsemiIn Stock: 12238MOC3033SR2M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MOC3033FR2M is determined by the following critical parameters:

• Output Type: Must be Triac output optoisolator
• Number of Channels: Single channel configuration
• Package / Case: 6-SMD, Gull Wing surface mount
• Zero Crossing Circuit: Required functionality
• Voltage - Off State: 250 V rating
• Current Specifications: LED trigger current (5mA max), hold current (400µA typ), and forward current (60mA max)
• Mounting Type: Surface mount requirement

The MOC3033SR2M qualifies as a substitute based on matching all core functional and package parameters. While the isolation voltage differs (4170Vrms versus 7500Vpk), both parts share identical channel count, output type, package configuration, and trigger/hold current specifications.

Parameter Comparison

Engineering Selection Recommendations

The MOC3033SR2M is the primary substitute for the obsolete MOC3033FR2M. Both components are manufactured by onsemi and maintain identical functional specifications for channel count, output type, package configuration, and current characteristics. The MOC3033SR2M carries Active product status with UL approval and ROHS3 compliance, providing superior long-term availability and regulatory support compared to the obsolete MOC3033FR2M.

The isolation voltage specification differs between the two parts. Applications requiring the full 7500Vpk isolation rating of the MOC3033FR2M must evaluate whether the 4170Vrms isolation of the MOC3033SR2M meets system requirements. For applications with isolation requirements at or below 4170Vrms, the MOC3033SR2M provides direct functional equivalence with improved product lifecycle status.

Frequently Asked Questions (FAQ)

Q: Can MOC3033SR2M directly replace MOC3033FR2M in existing designs?

A: Direct replacement is possible if the application isolation voltage requirement does not exceed 4170Vrms. Both parts share identical package, channel count, output type, and current specifications. Verify isolation voltage requirements before implementation.

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

A: These represent different measurement standards for isolation voltage. The MOC3033FR2M specifies peak voltage (Vpk) while the MOC3033SR2M specifies RMS voltage (Vrms). Applications must confirm that the 4170Vrms rating of the MOC3033SR2M satisfies system isolation requirements.

Q: Are the packages identical between these parts?

A: Yes. Both MOC3033FR2M and MOC3033SR2M use 6-SMD, Gull Wing surface mount packages with identical pinout and footprint compatibility.

Q: What is the product status difference and why does it matter?

A: The MOC3033FR2M is obsolete, indicating discontinued manufacturing and limited availability. The MOC3033SR2M is Active with current production, ensuring long-term supply chain reliability and access to technical support.

Q: Are there compliance differences between these parts?

A: The MOC3033SR2M includes UL approval and ROHS3 compliance certification. The MOC3033FR2M does not list these certifications. Applications requiring specific regulatory compliance should confirm the MOC3033SR2M meets all requirements.