MOC3043FVM Equivalent & Substitute Parts

Part Overview

The MOC3043FVM is a 7.5kV isolation optoisolator with triac output manufactured by onsemi in a 6-SMD surface mount package. This component provides galvanic isolation for AC switching applications with zero-crossing detection capability. The part is currently listed as obsolete, making identification of compatible substitutes essential for ongoing design support and production continuity.

Substiute Parts

MOC3043FVM

onsemiIn Stock: 931MOC3043FVM Datasheet

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MOC3043SVM

onsemiIn Stock: 1113MOC3043SVM Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MOC3043FVM is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Output Type: Triac configuration required
• Number of Channels: Single channel
• Zero Crossing Circuit: Present
• Mounting Type: Surface Mount
• Package / Case: 6-SMD, Gull Wing
• Voltage - Off State: 400 V
• Current - LED Trigger (Ift) Max: 5mA
• Current - Hold (Ih) Typical: 400µA
• Current - DC Forward (If) Max: 60 mA

Isolation Voltage Consideration: The MOC3043FVM specifies 7500Vpk isolation. Substitute parts must maintain isolation voltage ratings sufficient for the application. The MOC3043SVM provides 4170Vrms isolation, which represents a lower isolation rating and must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

The MOC3043SVM is the designated substitute for the obsolete MOC3043FVM based on functional equivalence in triac output configuration, channel count, zero-crossing detection, and electrical trigger characteristics. Both parts share identical package geometry (6-SMD, Gull Wing) and mounting methodology, enabling direct PCB layout compatibility.

The MOC3043SVM holds active product status with onsemi, ensuring ongoing availability and manufacturing support. The substitute part carries RoHS3 compliance certification and maintains REACH unaffected status, meeting current regulatory requirements. Operating temperature range (-40°C to 85°C) is specified for the MOC3043SVM, providing defined thermal operating boundaries.

The primary electrical difference is isolation voltage rating: MOC3043FVM at 7500Vpk versus MOC3043SVM at 4170Vrms. Circuit designers must confirm that the lower isolation voltage of the substitute part satisfies application-specific isolation requirements before implementation.

Frequently Asked Questions (FAQ)

Q: Can MOC3043SVM directly replace MOC3043FVM in existing designs?

A: Direct PCB replacement is possible due to identical package configuration (6-SMD, Gull Wing) and matching pin functionality. However, the isolation voltage difference (7500Vpk vs. 4170Vrms) must be evaluated against circuit isolation requirements. If the application requires 7500Vpk isolation, the MOC3043SVM may not be suitable.

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

A: The primary difference is isolation voltage rating. Both parts share identical triac output configuration, single-channel design, zero-crossing detection, LED trigger current (5mA max), hold current (400µA typical), and forward current (60mA max). The MOC3043SVM provides additional specification data including forward voltage (1.25V typical) and operating temperature range (-40°C to 85°C).

Q: Are there packaging or handling differences?

A: Both parts use 6-SMD surface mount packages with gull wing leads and MSL 1 (unlimited) moisture sensitivity rating. The MOC3043SVM is supplied in tube packaging, while the MOC3043FVM packaging format is not specified. No special handling differences exist between the two parts.

Q: What compliance certifications apply to the substitute part?

A: The MOC3043SVM carries IEC/EN/DIN and UL approval agency certifications, RoHS3 compliance, REACH unaffected status, and EAR99 export classification. These certifications support use in regulated applications and international markets.

Q: Why is the MOC3043FVM listed as obsolete?

A: The MOC3043FVM is obsolete per onsemi product status. The MOC3043SVM represents the active product line continuation within the MOC304 base product family, providing equivalent functionality with current manufacturing support.