Why Choose the ABB MBN375 N+PE / Terminal Expansion 3PW?
The ABB MBN375 is a CombiLine N N+PE busbar and terminal expansion module designed for structured neutral, protective-earth and terminal distribution within compatible ABB low-voltage distribution cabinets. Supplied under ABB order code 2CPX041756R9999, it forms part of the ABB DESUJ Sub Distribution product group and combines provision for N/PE copper busbars with DIN-rail mounting for terminal blocks.
Designed for a 3-panel-width (3PW) configuration, the MBN375 measures 450 × 750 × 200 mm and provides 108 space units. The module incorporates 2 horizontal DIN rails for terminal blocks together with a 2-pole horizontal N/PE busbar system using ABB ZX518 busbar holders and supporting a maximum of two copper rails.
The MBN375 supports a maximum rated current of 440 A. Its mounting arrangement is steplessly adjustable in depth, providing approximately 90–145 mm usable depth and approximately 688 mm usable width. Copper busbars are ordered separately, while closed RAL 7035 plastic covers with 90-degree press-and-turn fasteners provide a protected finished installation.
Key Advantages
- Combines N/PE busbar distribution and terminal mounting within one CombiLine module.
- Supports a maximum rated current of 440 A.
- 3-panel-width (3PW) format provides approximately 688 mm usable width.
- Includes 2 horizontal DIN rails for terminal block installation.
- Supports a 2-pole horizontal busbar system with a maximum of two copper rails.
- Stepless depth adjustment provides approximately 90–145 mm usable installation depth.
Key Features
- ABB MBN375 CombiLine N N+PE busbar module.
- 3-panel-width (3PW) configuration.
- 3 grid units / 450 mm module height.
- 750 mm module width.
- 200 mm module depth.
- 108 space units.
- 2 horizontal DIN rails for terminal blocks.
- 2-pole horizontal N/PE busbar system.
- Maximum of 2 copper busbars.
- ZX518 busbar holders.
- Maximum rated current of 440 A.
- Approximately 688 mm usable width.
- Steplessly adjustable depth with approximately 90–145 mm usable depth.
- Closed RAL 7035 plastic covers with 90-degree press-and-turn fastening.
Combined N+PE Busbar and Terminal Distribution up to 440 A
The ABB MBN375 combines two functions within one modular cabinet field: a 2-pole horizontal copper busbar system for neutral and protective-earth distribution and two additional horizontal DIN rails for terminal blocks. This arrangement helps create an organised interface between the main distribution system and outgoing or field wiring while maintaining clear separation and accessibility within the cabinet.
With a maximum rated current of 440 A, approximately 688 mm usable width and steplessly adjustable mounting depth, the MBN375 is particularly suited to larger sub-distribution assemblies. Copper busbars are selected separately for the required installation, while the 3PW module can be integrated with compatible ABB EDF or WR mounting-frame systems.
Typical Applications
- ABB CombiLine N low-voltage distribution cabinets.
- Neutral and protective-earth busbar distribution.
- Terminal block and field wiring installations.
- Commercial and industrial sub-distribution boards.
- Switchboard N/PE distribution up to 440 A.
- Professional panel-building and system integration projects.
