Why Choose the ABB MK307 Terminal Expansion 3PW?
The ABB MK307 is a horizontal terminal block expansion module designed for structured terminal installation within ABB CombiLine electrical distribution systems. Supplied under ABB order code 2CPX041232R9999, the MK307 is a three-field-width module supplied mounted and installed in the cabinet for professional low-voltage sub-distribution applications.
The MK307 provides a 2 RE / 300 mm module height and a 3 FB / 750 mm field width, providing 72 space units. Its horizontal terminal arrangement uses 35 × 15 mm DIN rails with perforations for wire holders, while the three-field-wide construction incorporates an additional stabilisation rail.
With a 150 mm row spacing, a usable terminal width of 688 mm and an adjustable usable depth of 68–145 mm, the MK307 provides flexible accommodation for terminal blocks and associated wiring. The module is suitable for cabinets from 200 mm depth and uses closed plastic covers with 90-degree push-turn fasteners.
Key Advantages
- Purpose-designed horizontal terminal block expansion module for ABB CombiLine systems.
- 3PW / 3-field-width configuration provides substantial terminal mounting capacity.
- 72 space units for structured electrical connections.
- 688 mm usable terminal width supports extensive terminal arrangements.
- Continuously adjustable usable depth from 68–145 mm.
- Additional stabilisation rail supports the wide three-field DIN-rail arrangement.
Key Features
- ABB CombiLine interior expansion system.
- Horizontal terminal block module configuration.
- 2 raster units (RE) / 300 mm height.
- 3 field widths (FB) / 750 mm width.
- 72 space units.
- 150 mm row spacing.
- 35 × 15 mm DIN rails with perforations for wire holders.
- 688 mm usable terminal width.
- Continuously adjustable usable depth from 68–145 mm.
- Additional stabilisation rail for the three-field-width DIN-rail arrangement.
- Closed plastic covers with 90-degree push-turn fasteners.
- RAL 7035 finish.
- Designed for installation from a 200 mm cabinet depth.
Structured Terminal Expansion for Distribution Cabinets
Terminal expansion modules such as the ABB MK307 provide dedicated DIN-rail mounting space for terminal blocks within electrical distribution assemblies. The horizontal arrangement helps panel builders organise connection points and conductor routing systematically, improving accessibility for installation, inspection and maintenance.
The MK307 combines a wide three-field format with adjustable mounting depth and additional DIN-rail stabilisation. As part of the ABB CombiLine interior expansion system, it provides a structured solution for increasing terminal capacity in low-voltage distribution cabinets, with the appropriate EDF or WR mounting frame ordered separately.
Typical Applications
- Low-voltage electrical distribution cabinets.
- ABB CombiLine interior expansion systems.
- Sub-distribution boards and switchgear assemblies.
- Horizontal terminal block mounting and wiring organisation.
- Commercial and industrial electrical installations.
- Panel building and distribution cabinet interior expansion.
