MOC3082FVM Equivalent & Substitute Parts

Part Overview

The MOC3082FVM is a 7.5kV isolation optoisolator with triac output manufactured by onsemi in a 6-SMD surface mount package. This component is designed for applications requiring galvanic isolation with direct triac switching capability and integrated zero-crossing detection. The part is currently listed as obsolete, making identification of compatible substitutes essential for ongoing production and maintenance applications.

Substiute Parts

MOC3082FVM

onsemiIn Stock: 787MOC3082FVM Datasheet

Current PartRFQ

MOC3082SVM

Fairchild SemiconductorIn Stock: 1594MOC3082SVM Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MOC3082FVM is determined by the following critical parameters:

• Output Type: Must be Triac output for direct switching capability
• Zero Crossing Circuit: Must include integrated zero-crossing detection
• Number of Channels: Must be single channel (1 channel)
• Mounting Type: Must be Surface Mount compatible
• Package / Case: Must be 6-SMD, Gull Wing format
• Voltage - Isolation: Minimum 4170Vrms (equivalent to 5900Vpk) acceptable for most applications; 7500Vpk provides higher margin
• Voltage - Off State: 800 V standard across compatible devices
• Current Specifications: LED trigger current (Ift) 10mA and hold current (Ih) 500µA must be matched or exceeded

The MOC3082SVM meets all substitution criteria as an active product with compatible electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The MOC3082SVM is a direct functional substitute for the obsolete MOC3082FVM. Both components share the MOC308 base product number and are electrically compatible across all specified parameters. The MOC3082SVM offers the following advantages:

• Active Product Status: Currently manufactured and available through distribution channels, ensuring supply chain continuity
• Enhanced Certifications: Holds IEC/EN/DIN and UL approvals, providing broader compliance coverage for regulated applications
• Specified Operating Range: Includes documented operating temperature range (-40°C ~ 85°C) and additional electrical parameters (Static dV/dt, Voltage - Forward) for design verification
• Isolation Voltage: While the MOC3082SVM specifies 4170Vrms isolation (lower than the MOC3082FVM's 7500Vpk), this remains sufficient for standard triac switching applications and maintains the 800 V off-state voltage specification

Selection of the MOC3082SVM eliminates obsolescence risk while maintaining full electrical and mechanical compatibility with existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the MOC3082SVM directly replace the MOC3082FVM in existing designs?

A: Yes. Both components share identical package specifications (6-SMD, Gull Wing), mounting type (Surface Mount), and critical electrical parameters including output type (Triac), zero-crossing circuit presence, channel count (1), trigger current (10mA max), hold current (500µA typ), and forward current (60mA max). Pin-to-pin compatibility is maintained.

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

A: The MOC3082FVM specifies 7500Vpk isolation, while the MOC3082SVM specifies 4170Vrms isolation. These represent different measurement standards (peak versus RMS). The MOC3082SVM's 4170Vrms is equivalent to approximately 5900Vpk, which is lower than the original specification but remains within acceptable limits for standard triac switching applications.

Q: Are there any compliance or certification differences?

A: The MOC3082SVM includes documented IEC/EN/DIN and UL approvals, whereas the MOC3082FVM approval agency is not specified. For applications requiring specific regulatory compliance, the MOC3082SVM's certifications provide documented qualification.

Q: What is the inventory status of these parts?

A: The MOC3082FVM (obsolete) has 690 pieces available as new original stock. The MOC3082SVM (active product) has 1558 pieces available, providing greater supply availability for new production.

Q: Are there any thermal or operating condition differences?

A: The MOC3082SVM specifies an operating temperature range of -40°C ~ 85°C. The MOC3082FVM operating temperature is not specified in available documentation. Designs operating outside the MOC3082SVM's specified range require additional thermal analysis.