2CPX041238R9999 ABB MK309 Terminal Expansion 3PW

Why Choose the ABB MK309 Terminal Expansion 3PW?

The ABB MK309 is a factory-assembled CombiLine terminal expansion module designed for mounting terminal blocks within compatible ABB low-voltage distribution cabinets. Supplied under ABB order code 2CPX041238R9999, it provides a large, structured internal mounting area for terminal connections and conductor organisation in sub-distribution assemblies.

The MK309 is configured for 3 panel widths (3 PW) with a field width of 750 mm and a module height of 600 mm. Its 4 RE format provides 144 space units, making it particularly suitable for larger electrical distribution panels requiring extensive terminal capacity.

Designed as part of ABB's modular CombiLine internal expansion system, the MK309 is suitable for both EDF and WR mounting-frame arrangements and is intended for cabinets from 200 mm depth. The factory-installed configuration helps panel builders create consistent, accessible terminal sections while making efficient use of the available cabinet width.

Key Advantages

• Purpose-designed terminal expansion module for ABB CombiLine distribution systems.
• 3 PW configuration provides extensive terminal mounting capacity.
• 750 mm field width for larger distribution-board layouts.
• 144 space units provide substantial internal expansion capacity.
• 600 mm module height supports organised terminal and wiring arrangements.
• Compatible with EDF and WR mounting-frame systems.
• Suitable for distribution cabinets from 200 mm depth.
• Factory-assembled format simplifies integration into compatible ABB cabinets.

Key Features

• ABB CombiLine internal expansion system.
• 3 panel widths (3 PW).
• 4 raster units (4 RE).
• 600 mm module height.
• 750 mm field width.
• 144 space units.
• Designed as a terminal expansion field for low-voltage distribution assemblies.
• Compatible with EDF mounting frames.
• Compatible with WR mounting frames.
• Suitable for cabinets with a minimum depth of 200 mm.
• Supplied as a mounted and installed cabinet configuration.
• Coordinated with ABB modular sub-distribution equipment.

Reliable Terminal Expansion for Distribution Systems

Terminal expansion modules provide dedicated internal space for organising the terminal connections required within low-voltage electrical distribution assemblies. The ABB MK309 combines a wide 3 PW format with a 600 mm-high mounting field, allowing panel builders to create substantial terminal sections while retaining a structured modular cabinet layout.

As part of the ABB CombiLine internal expansion system, the MK309 coordinates with other modular distribution-board components and supports both EDF and WR mounting arrangements. Its 144-space-unit capacity makes it well suited to larger commercial and industrial assemblies where organised terminal expansion, accessibility and efficient use of cabinet space are important.

Typical Applications

• Low-voltage sub-distribution boards.
• ABB CombiLine distribution assemblies.
• Large terminal sections within electrical cabinets.
• Commercial building electrical distribution systems.
• Industrial power distribution panels.
• Control and automation cabinet terminal sections.
• Panel-building applications requiring high terminal capacity.