MOC3081FVM Equivalent & Substitute Parts

Part Overview

The MOC3081FVM is a 7.5kV isolation optoisolator with triac output in a 6-SMD surface mount package, manufactured by onsemi. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design requirements and procurement planning. The MOC3081FVM provides galvanic isolation suitable for AC switching applications requiring high voltage isolation ratings.

Substiute Parts

MOC3081FVM

onsemiIn Stock: 912MOC3081FVM Datasheet

Current PartRFQ

MOC3081SVM

onsemiIn Stock: 1268MOC3081SVM Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MOC3081FVM is determined by the following critical parameters:

• Output Type: Triac output configuration
• Package / Case: 6-SMD, Gull Wing surface mount form factor
• Number of Channels: Single channel isolation
• Zero Crossing Circuit: Presence of zero crossing detection
• Voltage - Off State: 800 V rating
• Current - LED Trigger (Ift) (Max): 15mA maximum
• Current - Hold (Ih) (Typ): 500µA typical
• Current - DC Forward (If) (Max): 60 mA maximum
• Mounting Type: Surface Mount compatibility

The MOC3081SVM qualifies as a substitute based on matching these core electrical and mechanical parameters. While the isolation voltage rating differs (4170Vrms versus 7500Vpk), the MOC3081SVM maintains functional equivalence for applications where the lower isolation rating is acceptable within system design margins.

Parameter Comparison

Engineering Selection Recommendations

The MOC3081SVM is the active equivalent for the obsolete MOC3081FVM. Selection between these parts depends on isolation voltage requirements:

• MOC3081FVM: 7500Vpk isolation rating. Use when maximum isolation voltage is a design requirement. Obsolete status limits procurement to existing inventory.

• MOC3081SVM: 4170Vrms isolation rating with active product status. Recommended for new designs and ongoing procurement. Includes ROHS3 compliance and IEC/EN/DIN/UL certifications. Provides specified operating temperature range (-40°C ~ 85°C) and static dV/dt rating (600V/µs).

Both parts share identical package form factor (6-SMD, Gull Wing), triac output configuration, zero crossing circuit, and trigger/hold current specifications, enabling direct footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can MOC3081SVM directly replace MOC3081FVM in existing designs?

A: Yes, for footprint and basic functional compatibility. Both use 6-SMD, Gull Wing packages with identical pin configurations. Verify that the 4170Vrms isolation rating of the MOC3081SVM meets your application's isolation voltage requirements, as it is lower than the MOC3081FVM's 7500Vpk rating.

Q: What is the primary difference between these parts?

A: The isolation voltage rating differs. MOC3081FVM provides 7500Vpk isolation, while MOC3081SVM provides 4170Vrms isolation. All other electrical parameters (trigger current, hold current, forward current, off-state voltage) are identical.

Q: Why is MOC3081FVM listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The MOC3081SVM represents the active product line continuation within the MOC308 base product family.

Q: Are there package or mounting differences?

A: No. Both parts use identical 6-SMD, Gull Wing surface mount packages suitable for automated assembly.

Q: What compliance certifications apply to MOC3081SVM?

A: MOC3081SVM holds IEC/EN/DIN and UL approvals, with ROHS3 compliance. MOC3081FVM compliance certifications are not specified in available documentation.

Q: Can I use MOC3081SVM in high-voltage isolation applications?

A: MOC3081SVM is rated for 4170Vrms isolation. Confirm this rating satisfies your application's isolation voltage requirements before selection. For applications requiring 7500Vpk isolation, alternative parts with higher ratings must be evaluated.