MOC3043TM Equivalent & Substitute Parts

Part Overview

The MOC3043TM is a 4.17kV isolation optoisolator with triac output in a 6-DIP package, manufactured by onsemi. This component integrates an LED input stage with a triac output stage, providing galvanic isolation for AC switching applications. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar functionality.

Substiute Parts

MOC3043TM

onsemiIn Stock: 23747MOC3043TM Datasheet

Current PartRFQ

MOC3043TVM

onsemiIn Stock: 1338MOC3043TVM Datasheet

DirectRFQ

VO3063-X006

Vishay Semiconductor Opto DivisionIn Stock: 1843VO3063-X006 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MOC3043TM are identified based on the following critical parameters that determine functional compatibility:

Direct Equivalent Criteria:

• Output Type: Triac
• Zero Crossing Circuit: Yes
• Number of Channels: 1
• Package / Case: 6-DIP (0.400", 10.16mm)
• Mounting Type: Through Hole
• Current - LED Trigger (Ift) (Max): 5mA
• Current - DC Forward (If) (Max): 60 mA

Allowable Parameter Variations for Substitution:

• Voltage - Isolation: Equal to or greater than 4170Vrms
• Voltage - Off State: Equal to or greater than 400 V
• Static dV/dt (Min): Equal to or greater than 1kV/µs
• Current - Hold (Ih): Equal to or less than 400µA (Typ)
• Operating Temperature Range: Must encompass or exceed -40°C ~ 85°C

Two substitute parts meet these criteria with documented compatibility.

Parameter Comparison

Engineering Selection Recommendations

MOC3043TVM (onsemi) is the primary direct substitute for MOC3043TM. Both parts share identical electrical specifications and packaging. MOC3043TVM is currently in active production status, addressing the obsolescence of the original part. It carries expanded regulatory approvals (IEC/EN/DIN in addition to UL) and is ROHS3 compliant, meeting modern environmental standards. This part is the preferred choice for direct replacement in existing designs.

VO3063-X006 (Vishay Semiconductor Opto Division) is a compatible alternative optoisolator with enhanced specifications. It provides higher isolation voltage (5300Vrms vs. 4170Vrms), higher off-state voltage (600V vs. 400V), and improved dV/dt performance (1.5kV/µs vs. 1kV/µs). The hold current is lower (200µA vs. 400µA), and the operating temperature range is extended (-55°C ~ 100°C vs. -40°C ~ 85°C). This part is suitable for applications requiring higher isolation margins or extended temperature operation. It carries different regulatory approvals (cUR, UR) and is also ROHS3 compliant.

Both substitute parts maintain identical package geometry, mounting type, and core functional parameters (triac output, zero-crossing circuit, single channel, LED trigger current, forward current rating). Selection between them depends on application-specific isolation voltage requirements, temperature operating range, and regulatory certification needs.

Frequently Asked Questions (FAQ)

Q: Can MOC3043TVM be used as a direct replacement for MOC3043TM?

A: Yes. MOC3043TVM is a direct equivalent with identical electrical specifications, package, and mounting type. The primary difference is product status: MOC3043TVM is active production while MOC3043TM is obsolete.

Q: What are the key differences between MOC3043TVM and VO3063-X006?

A: Both are compatible triac optoisolators in 6-DIP packages. VO3063-X006 offers higher isolation voltage (5300Vrms vs. 4170Vrms), higher off-state voltage (600V vs. 400V), faster dV/dt (1.5kV/µs vs. 1kV/µs), lower hold current (200µA vs. 400µA), and extended temperature range (-55°C to 100°C vs. -40°C to 85°C). Both maintain the same LED trigger current (5mA) and forward current rating (60mA).

Q: Are there any package or pinout differences between these parts?

A: No. All three parts use identical 6-DIP (0.400", 10.16mm) through-hole packaging with the same pinout configuration. Direct PCB substitution is possible without layout modifications.

Q: Which substitute should I choose for a new design?

A: MOC3043TVM is recommended for designs requiring exact electrical equivalence to the original MOC3043TM. VO3063-X006 is suitable when higher isolation voltage, extended temperature range, or improved dV/dt performance provides system benefits.

Q: Are both substitutes RoHS compliant?

A: Yes. Both MOC3043TVM and VO3063-X006 are ROHS3 compliant. The original MOC3043TM RoHS status was not specified.

Q: What regulatory approvals do the substitute parts carry?

A: MOC3043TVM carries IEC/EN/DIN and UL approvals. VO3063-X006 carries cUR and UR approvals. Application requirements determine which certifications are necessary.