MOC3033VM Equivalent & Substitute Parts

Part Overview

The MOC3033VM is a triac output optoisolator manufactured by onsemi, designed for high-voltage isolation applications requiring zero-crossing detection. This component integrates an LED input stage with a triac output stage, providing galvanic isolation up to 4170Vrms across a single channel in a 6-DIP package.

The MOC3033VM is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support long-term product availability for applications currently utilizing this component.

Substiute Parts

MOC3033VM

onsemiIn Stock: 1034MOC3033VM Datasheet

Current PartRFQ

MOC3033M

Fairchild SemiconductorIn Stock: 2651MOC3033M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MOC3033VM is determined by strict equivalence across the following critical parameters:

• Output Type: Triac
• Zero Crossing Circuit: Yes
• Number of Channels: 1
• Voltage - Isolation: 4170Vrms
• Voltage - Off State: 250 V
• Static dV/dt (Min): 1kV/µs
• Current - LED Trigger (Ift) (Max): 5mA
• Current - Hold (Ih): 400µA (Typ)
• Voltage - Forward (Vf) (Typ): 1.25V
• Current - DC Forward (If) (Max): 60 mA
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 6-DIP (0.300", 7.62mm)

The MOC3033M from Fairchild Semiconductor meets all specified electrical and mechanical parameters, making it a direct functional equivalent for the obsolete MOC3033VM.

Parameter Comparison

Engineering Selection Recommendations

The MOC3033M is the appropriate substitute for the obsolete MOC3033VM. Both components share identical electrical specifications and mechanical packaging, ensuring direct functional compatibility in existing circuit designs.

The MOC3033M maintains active product status with Fairchild Semiconductor, providing improved supply chain availability compared to the obsolete MOC3033VM. The MOC3033M carries UL approval certification, meeting regulatory requirements for high-voltage isolation applications.

Selection of the MOC3033M eliminates obsolescence risk while maintaining full electrical and mechanical compatibility with designs originally specified for the MOC3033VM.

Frequently Asked Questions (FAQ)

Q: Can the MOC3033M directly replace the MOC3033VM in existing designs?

A: Yes. The MOC3033M is electrically and mechanically equivalent to the MOC3033VM across all specified parameters, including isolation voltage, triac output characteristics, zero-crossing detection, and 6-DIP package dimensions. No circuit modifications are required.

Q: What is the primary reason to substitute the MOC3033VM?

A: The MOC3033VM is classified as obsolete. The MOC3033M provides equivalent functionality with active product status, ensuring long-term supply chain availability and design continuity.

Q: Are there any differences in approval certifications between these parts?

A: The MOC3033VM carries IEC/EN/DIN and UL approvals. The MOC3033M carries UL approval. Both certifications are suitable for high-voltage isolation applications. Verify specific regulatory requirements for your application.

Q: Is the 6-DIP package identical between both parts?

A: Yes. Both the MOC3033VM and MOC3033M use the same 6-DIP (0.300", 7.62mm) through-hole package, ensuring identical PCB footprint and mounting compatibility.

Q: What are the critical electrical parameters that define substitution compatibility?

A: Substitution compatibility is determined by matching isolation voltage (4170Vrms), off-state voltage (250V), static dV/dt rating (1kV/µs), LED trigger current (5mA max), hold current (400µA typ), forward voltage (1.25V typ), and forward current (60mA max). The MOC3033M meets all these specifications.