ABB MBR303 is a 3PW CombiLine N 60 mm horizontal three-pole busbar module kit rated up to 630 A for integrating compatible D0 and NH fuse switching equipment into low-voltage distribution assemblies.
Why Choose the ABB MBR303 Busbar Module Expansion 3PW?
The ABB MBR303 is a CombiLine N 60 mm horizontal busbar module expansion kit designed for integrating D0 and NH fuse switch-disconnectors or bus-mounted fuse sockets into professional low-voltage distribution assemblies. Supplied under ABB order code 2CPX041832R9999, this unpopulated 3PW module provides a structured three-pole busbar platform for modular power distribution.
The MBR303 is designed around a horizontal three-pole busbar system with a 60 mm busbar centre distance. It incorporates ABB ZX146 busbar holders, supports up to three copper busbars and has a maximum rated current of 630 A. The 3PW version is additionally braced in the centre to support its wider module format.
With dimensions of 450 mm high × 750 mm wide × 260 mm deep, the MBR303 provides a useful equipment width of 665 mm and 108 space units. It is suitable from a cabinet depth of 275 mm, subject to the depth of the installed equipment, and is designed for expansion on a compatible WR mounting frame.
Key Advantages
Purpose-designed 60 mm horizontal busbar module for ABB CombiLine N assemblies.
3PW configuration provides a 750 mm-wide equipment section with 665 mm useful width.
Supports vertical installation of compatible D0 and NH fuse switch-disconnectors or bus-mounted fuse sockets.
Three-pole busbar arrangement rated up to 630 A.
Integrated ZX146 busbar holders support up to three copper busbars.
Additional centre bracing supports the wider three-field module construction.
Key Features
ABB MBR303 CombiLine N busbar module kit.
3PW / three-field-width configuration.
3 grid units / 450 mm module height.
750 mm module width.
260 mm module depth.
665 mm useful equipment width.
108 space units.
Three-pole horizontal busbar system.
60 mm busbar centre distance.
Maximum of 3 copper busbars.
ZX146 busbar holders.
Maximum rated current of 630 A.
Rated operational voltage of 400 V AC.
Closed plastic cover with 90-degree press-and-turn fasteners.
RAL 7035 finish.
Busbars and mounting frame are ordered separately.
Reliable 60 mm Busbar Distribution
The ABB MBR303 provides a structured horizontal busbar platform for distributing power to compatible vertically mounted fuse switching and fuse-base equipment. Its three-pole, 60 mm-centre busbar arrangement and maximum 630 A rated current make it suitable for substantial feeder and distribution functions within compatible CombiLine N assemblies.
The ZX146 busbar holders, additional centre bracing and 665 mm useful equipment width provide a purpose-designed foundation for the wider 3PW configuration. Copper busbars and the WR mounting frame are selected separately, allowing the completed module to be configured around the requirements of the distribution assembly and installed equipment.
Typical Applications
Low-voltage electrical distribution boards.
Commercial and industrial switchboards.
Horizontal three-pole busbar distribution sections.
D0 and NH fuse switch-disconnector installations.
Bus-mounted fuse socket applications.
Main and sub-distribution assemblies.
ABB CombiLine N interior expansion systems.
Technical Specifications
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Busbar Centre Distance (mm)
60 mm
Product Series
ABB CombiLine
Device Type
Busbar
Series
CombiLine N
ABB order code
2CPX041832R9999
Product type
60 mm horizontal busbar module expansion kit
Product group
DESUJ Sub Distribution
Configuration
3PW
Delivery format
Flatpack kit, unmounted and unpopulated
Height
450 mm
Width
750 mm
Depth
260 mm
Grid units
3
Space units
108
Useful equipment width
665 mm
Equipment orientation
Vertical
Compatible equipment
D0 and NH fuse switch-disconnectors or bus-mounted fuse sockets
Busbar poles
3
Busbar orientation
Horizontal
Busbar centre distance
60 mm
Maximum number of busbars
3
Busbar holder
ZX146
Rated current
Maximum 630 A
Rated operational voltage
400 V AC
Rated frequency
50 Hz
Rated insulation voltage
690 V
Rated impulse withstand voltage
6 kV
Minimum cabinet depth
275 mm, dependent on installed equipment depth
Cover material
Plastic
Cover design
Closed
Cover closure
90-degree press-and-turn
Colour
RAL 7035
Compatible mounting frame
WR, ordered separately
Fire-protection housing suitability
Not suitable
Corresponding assembled version
MR303
Assembled-version order code
2CPX041416R9999
Frequently Asked Questions
What is the ABB MBR303 used for?
The ABB MBR303 is a 3PW CombiLine N busbar module kit designed for a 60 mm horizontal three-pole busbar system and the vertical installation of compatible D0 and NH fuse switch-disconnectors or bus-mounted fuse sockets.
What is the maximum rated current of the ABB MBR303?
The MBR303 busbar module has a maximum rated current of 630 A.
Which busbar holders are fitted to the MBR303?
The MBR303 uses ABB ZX146 busbar holders and supports up to three copper busbars with a 60 mm centre distance.
Are the copper busbars included with the ABB MBR303?
No. The MBR303 is an unpopulated busbar module kit and the required copper busbars must be ordered separately. The compatible WR mounting frame is also ordered separately.
What size is the ABB MBR303?
The MBR303 measures 450 mm high × 750 mm wide × 260 mm deep, provides 108 space units and has a useful equipment width of 665 mm.
Trusted ABB Distribution System Engineering
ABB CombiLine N modules such as the MBR303 provide panel builders with a structured 60 mm busbar platform for integrating fuse switching and power-distribution equipment into professional low-voltage assemblies.
Busbar Centre Distance (mm)
60 mm
Product Series
ABB CombiLine
Device Type
Busbar
Series
CombiLine N
ABB order code
2CPX041832R9999
Product type
60 mm horizontal busbar module expansion kit
Product group
DESUJ Sub Distribution
Configuration
3PW
Delivery format
Flatpack kit, unmounted and unpopulated
Height
450 mm
Width
750 mm
Depth
260 mm
Grid units
3
Space units
108
Useful equipment width
665 mm
Equipment orientation
Vertical
Compatible equipment
D0 and NH fuse switch-disconnectors or bus-mounted fuse sockets
Free UK delivery on orders over £200 ex VAT. Order in-stock items before 2pm Monday to Friday for next-day delivery.
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