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94251246 - Tweco 4-MPC Male Cable Connector for 3/0-4/0 Cable

Packaging: pack of 2
$40.24/EA $58.80/pack of 2 only $29.40/EASave 27%

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OVERVIEW

Technical Overview: Tweco 9425-1246 (4-MPC) Male Connector

The Tweco 9425-1246 is a premium-grade Male Cable Connector belonging to the renowned No. 4 MPC (Mechanical Power Connector) series. Engineered for heavy-industrial applications, this connector is specifically sized to accommodate large-diameter welding cables ranging from 3/0 to 4/0 AWG. It serves as the male half of a quick-disconnect system, allowing operators to rapidly extend or shorten welding leads without compromising electrical integrity or safety.

At the core of the 4-MPC design is Tweco's signature ball-point cable connection. Unlike standard set screws that can shear copper strands and create hot spots, the ball-point screw applies radial pressure to the cable bundle, swedging the strands into the connector body for maximum surface contact. This mechanical termination method ensures high conductivity and excellent pull-out strength, eliminating the need for soldering or specialized crimping tools in the field. The connector body is machined from a high-copper alloy, selected for its superior electrical transmission properties and resistance to thermal cycling.

The external housing is crafted from a durable, specially formulated rubber compound that provides insulation against electrical shock while resisting the harsh environmental factors common in shipyards, fabrication shops, and construction sites. This includes resistance to oil, grease, solvents, ozone, and impact. The connector features a positive cam-action locking mechanism; when mated with a corresponding female connector, a simple twist locks the two halves together, preventing accidental separation during cable dragging or repositioning. This robust design minimizes voltage drop across the connection, ensuring that the welding machine's full output reaches the arc.

Key Technical Specifications:

  • Part Number: 9425-1246
  • Series: No. 4 MPC
  • Cable Compatibility: 3/0 (85mm²) to 4/0 (107mm²)
  • Connection Type: Single Ball-Point Mechanical Screw
  • Insulation: Heavy-duty synthetic rubber
Additional Information
Brand:Tweco
Product Type:Cable Connector
Connector Gender:Male
Cable Capacity:3/0 AWG, 4/0 AWG
Series:MPC (Mechanical Power Connector)
Model Number:4-MPC
Connection Style:Single Ball-Point Screw
Amperage Capacity:Up to 500A (Dependent on Cable)
Material:Copper Alloy, Rubber Insulation
Packaging Description:pack of 2

INCLUDED

  • 1x Tweco 4-MPC Male Connector Body
  • 1x Heavy-Duty Insulating Cover
  • 1x Ball-Point Cable Screw
  • 1x Copper Shim (if applicable for specific packaging)

APPLICATIONS

  • Heavy-duty stick welding lead extensions
  • MIG welder power cable connections
  • Shipyard and construction site power distribution
  • Portable welding rig setups
  • Repairing damaged cable ends

FAQ

This connector is designed for 3/0 to 4/0 AWG welding cables.

No, this SKU (9425-1246) is for the Male connector only. The matching female connector must be purchased separately.

Strip the cable insulation, insert the exposed copper strands into the connector body, and tighten the ball-point screw using a hex wrench until secure. Slide the rubber cover over the assembly.

It is generally compatible with other standard MPC-style connectors of the same size (No. 4 series), but using genuine Tweco parts ensures the best fit and safety.

The connector is rated to handle the amperage capacity of the cable attached, typically up to 500-600 amps for 4/0 cable depending on the duty cycle.

While it might physically clamp, it is not recommended. You should use the No. 2 MPC series for 1/0 and 2/0 cables to ensure proper contact and safety.

The connector body is machined from a high-conductivity copper alloy.

Yes, it features a positive cam-action lock. When mated with a female connector, a twist secures the two halves together.