MOC3051VM Equivalent & Substitute Parts

Part Overview

The MOC3051VM is an optoisolator with triac output manufactured by onsemi, designed for applications requiring galvanic isolation between control and power circuits. This component features a 4170Vrms isolation voltage rating and is housed in a 6-DIP through-hole package. The part is currently in active production status with 2102 units available in stock. Alternative models may be required due to design optimization, supply chain considerations, or application-specific performance requirements.

Substiute Parts

MOC3051VM

onsemiIn Stock: 2141MOC3051VM Datasheet

Current PartRFQ

VO3052-X016

Vishay Semiconductor Opto DivisionIn Stock: 2899VO3052-X016 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The VO3052-X016 from Vishay Semiconductor Opto Division qualifies as a substitute based on the following alignment criteria:

Common Functional Parameters:

• Output Type: Triac (both parts)
• Number of Channels: 1 (both parts)
• Voltage - Off State: 600 V (both parts)
• Mounting Type: Through Hole (both parts)
• Package Type: 6-DIP (both parts)
• RoHS Status: ROHS3 Compliant (both parts)
• Approval Agencies: Both carry UR and VDE certifications

Substitution Basis: The VO3052-X016 maintains functional equivalence through identical channel configuration, output topology, and package form factor. Both components operate within compatible voltage and current specifications for triac-output optoisolator applications. The 6-DIP through-hole package ensures mechanical and electrical compatibility in existing PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

MOC3051VM Selection Criteria:

• Primary choice when 4170Vrms isolation voltage is specified
• Preferred for designs with 15mA LED trigger current budget
• Suitable for operating temperature range -40°C to 85°C
• Compact 6-DIP package (0.300" width) for space-constrained layouts
• Active production status with established supply availability

VO3052-X016 Selection Criteria:

• Enhanced isolation voltage rating (5300Vrms) for high-voltage applications
• Lower LED trigger current requirement (10mA) reduces driver circuit complexity
• Extended operating temperature range (-55°C to 100°C) for extreme environment applications
• Higher static dV/dt rating (1.5kV/µs) for faster transient response
• Wider 6-DIP package (0.400") requires PCB layout verification
• Active production status with established supply availability
• Additional cUR certification for North American applications

Both parts maintain ROHS3 compliance and carry UR/VDE certifications, ensuring regulatory alignment for industrial and consumer applications.

Frequently Asked Questions (FAQ)

Q: Can VO3052-X016 directly replace MOC3051VM in existing designs? A: Functional replacement is possible due to identical triac output topology, single-channel configuration, and 6-DIP package type. However, the VO3052-X016 has a wider DIP body (0.400" vs 0.300"), requiring verification that PCB pad spacing accommodates the larger package footprint. Electrical parameter differences must be evaluated against circuit requirements.

Q: What are the key electrical differences between these parts? A: The VO3052-X016 provides higher isolation voltage (5300Vrms vs 4170Vrms), lower LED trigger current (10mA vs 15mA), and higher static dV/dt rating (1.5kV/µs vs 1kV/µs). The MOC3051VM operates within -40°C to 85°C, while VO3052-X016 extends to -55°C to 100°C.

Q: Are there package compatibility concerns? A: Yes. Both use 6-DIP through-hole packages, but the VO3052-X016 body width is 0.400" (10.16mm) compared to MOC3051VM at 0.300" (7.62mm). PCB hole spacing and pad layout must be verified before substitution.

Q: Do both parts meet the same regulatory standards? A: Both are ROHS3 compliant with UR and VDE certifications. The VO3052-X016 additionally carries cUR certification, providing broader North American regulatory coverage.

Q: Which part should be selected for new designs? A: Selection depends on application requirements. Choose MOC3051VM for standard isolation voltage applications with compact package constraints. Choose VO3052-X016 for high-voltage isolation, extreme temperature environments, or applications requiring lower LED trigger current and enhanced transient response.