ABB MK309 is a 3 PW CombiLine terminal expansion module with a 750 mm field width, 600 mm module height and 144 space units for compatible low-voltage distribution cabinets.
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.
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.
Technical Specifications
Tick the specs you need, then view products that match.
Device Type
Busbar / Terminal
Current
850 A
Product Series
S&J CombiLine N
Series
CombiLine
ABB order code
2CPX041238R9999
Product type
Terminal expansion module
Panel width
3 PW
Raster units
4 RE
Module height
600 mm
Field width
750 mm
Space units
144
Minimum applicable cabinet depth
200 mm
Mounting-frame compatibility
EDF / WR
Installation
Mounted and installed in cabinet
Product group
DESUJ Sub Distribution
Frequently Asked Questions
What is the ABB MK309 used for?
The ABB MK309 is a terminal expansion module designed to provide structured terminal mounting capacity within compatible ABB CombiLine low-voltage distribution cabinets.
What panel width is the MK309 designed for?
The MK309 is designed for 3 PW and has a field width of 750 mm.
How many space units does the MK309 provide?
The ABB MK309 provides 144 space units within its 4 RE, 600 mm-high expansion field.
What mounting frames are compatible with the MK309?
The MK309 is designed for use with compatible EDF and WR mounting-frame arrangements within the ABB CombiLine system.
What cabinet depth is required for the MK309?
The ABB MK309 is intended for compatible distribution cabinets with a minimum depth of 200 mm.
Trusted ABB Distribution System Components
ABB CombiLine terminal expansion components provide coordinated modular solutions for creating organised, accessible and adaptable terminal sections within commercial and industrial low-voltage distribution assemblies.
Device Type
Busbar / Terminal
Current
850 A
Product Series
S&J CombiLine N
Series
CombiLine
ABB order code
2CPX041238R9999
Product type
Terminal expansion module
Panel width
3 PW
Raster units
4 RE
Module height
600 mm
Field width
750 mm
Space units
144
Minimum applicable cabinet depth
200 mm
Mounting-frame compatibility
EDF / WR
Installation
Mounted and installed in cabinet
Product group
DESUJ Sub Distribution
No documents available for this product.
UK delivery
Delivery options
Free UK delivery on orders over £200 ex VAT. Order in-stock items before 2pm Monday to Friday for next-day delivery.
This productManufacturer Lead Time
Estimated Delivery 6 weeks
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£8 ex VAT · free over £200
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Send your order number, product details and reason for return. For faults or delivery damage, include photographs if available. We will confirm the next steps.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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