Why Choose the ABB MBN263 N+PE / Terminal Expansion?
The ABB MBN263 is a CombiLine N+PE busbar and terminal expansion kit designed for neutral, protective earth and terminal distribution within ABB low-voltage sub-distribution assemblies. Supplied under ABB order code 2CPX041766R9999, it belongs to ABB’s DESUJ Sub Distribution product group and combines high-current busbar distribution with dedicated terminal mounting capacity in a practical two-panel-width module.
The MBN263 is supplied as an unassembled internal installation module for a 2-pole horizontal N+PE busbar system and terminal blocks. It incorporates an ABB ZX149 busbar holder, supports a maximum of 2 copper busbars measuring up to 30 × 10 mm, and is rated for a maximum current of 630 A. The required copper busbars are ordered separately.
With a module height of 450 mm, a 2PW field width of 500 mm and 72 space units, the MBN263 provides substantial capacity for combined N+PE distribution and terminal installation. Its terminal mounting system is continuously adjustable in depth, providing 90–145 mm usable depth and 438 mm usable width, while the module is suitable for cabinets from 275 mm depth.
Key Advantages
- Combines N+PE busbar distribution and terminal mounting within one ABB CombiLine module.
- Maximum rated current of 630 A for substantial low-voltage distribution requirements.
- 2-pole horizontal busbar system for neutral and protective earth distribution.
- Two additional DIN rails provide dedicated capacity for terminal blocks.
- 438 mm usable terminal width provides generous connection space across the 2PW field.
- Continuously adjustable 90–145 mm usable depth provides flexibility when arranging terminals and conductors.
Key Features
- ABB MBN263 CombiLine internal installation module.
- Designed for N+PE busbars and terminal blocks.
- 2 panel width (2PW) configuration.
- 3 grid units (3GU).
- 450 mm module height.
- 500 mm field width.
- 72 space units.
- 2 additional DIN rails for terminal blocks.
- 2-pole horizontal busbar system.
- 92 mm busbar spacing.
- Supports a maximum of 2 copper busbars.
- 630 A maximum rated current.
- 20 kA short-time withstand current (Icw).
- Supplied with ZX149 busbar holder.
- 438 mm usable terminal width.
- 90–145 mm usable installation depth.
- Closed plastic covers with 90-degree press-and-turn fasteners.
- RAL 7035 light grey finish.
- Compatible with a WR mounting frame, ordered separately.
Reliable N+PE and Terminal Distribution for Electrical Panels
Combined N+PE and terminal modules provide an organised platform for neutral and protective earth distribution alongside terminal connections within low-voltage switchboards. Integrating these functions into a coordinated installation field helps panel builders maintain structured wiring, accessible termination points and efficient use of enclosure space.
The ABB MBN263 combines a 2-pole horizontal busbar system, support for up to 2 copper busbars and a maximum rated current of 630 A with two additional DIN rails for terminal blocks. Its 438 mm usable terminal width and continuously adjustable 90–145 mm mounting depth make it a flexible solution for professional CombiLine sub-distribution assemblies.
Typical Applications
- Low-voltage sub-distribution boards.
- ABB CombiLine electrical distribution assemblies.
- Neutral and protective earth busbar distribution.
- Terminal block and conductor termination arrangements.
- Commercial and industrial distribution cabinets.
- Electrical panel building requiring combined N+PE and terminal capacity.
