Galvanised steel busbar DDB-1B125

coppercompactfor distribution

Presentation
Neutral busbar rated 125 A with 13 connections, designed to extend neutral distribution points in electrical panels and complement 125 A distribution blocks.

Electrical characteristics

• Rated current : 125 A
• Number of connections : 13
• Number and diameter of holes :
  • 4 x Ø7.5 mm
  • 9 x Ø5.5 mm
• Cable cross-sections :
  • For Ø7.5 mm: flexible with ferrules 6–16 mm² / solid 10–25 mm²
  • For Ø5.5 mm: flexible with ferrules 1.5–6 mm² / solid 2.5–6 mm²
• Tightening torque : 2–3 Nm
• Peak short-circuit current (IPK) : 30 kA
• Icw : 4.5 kA

Physical characteristics

• Conductor block : high-conductivity copper
• Screws : zinc-plated steel
• Mounting : integration into electrical panel
• Dimensions (L x H x D) : 142 x 38 x 38 mm

Functions
The additional neutral busbar increases the number of neutral connection points in a panel. It is intended to be paired with 125 A bipolar and quadruple distribution blocks to provide dedicated neutral terminals.

Applications
Suitable for commercial and industrial installations requiring multiple outgoing circuits: sub-distribution boards, electrical cabinets, multi-circuit installations.

Usage advice

• Respect the permitted cable cross-sections for each terminal type.
• Apply a tightening torque of 2–3 Nm to ensure reliable contact.
• Disconnect power before any intervention.
• Use ferrules on flexible cables to ensure optimal connection.
• Regularly check terminal tightness and the general condition of the busbar.
• Do not exceed rated current and short-circuit withstand values (IPK and Icw).

Related products

• 125 A / 690 V bipolar distribution block – 7 and 15 connections
• 125 A / 500 V bipolar distribution block – 7, 11 and 15 connections
• 125 A / 690 V quadruple distribution block – 7, 11 or 15 connections
• 125 A / 500 V quadruple distribution block – 7, 11 or 15 connections

Documents

• Distribution block range (PDF, 5 MB)

Technical specifications

• Rated current: 125 A
• Connections: 13
• Holes: 4 x Ø7.5 mm ; 9 x Ø5.5 mm
• Cable sections Ø7.5 mm: flexible with ferrules 6–16 mm² / solid 10–25 mm²
• Cable sections Ø5.5 mm: flexible with ferrules 1.5–6 mm² / solid 2.5–6 mm²
• Tightening torque: 2–3 Nm
• Peak short-circuit current (IPK): 30 kA
• Icw: 4.5 kA
• Conductor material: high-conductivity copper
• Screws: zinc-plated steel
• Mounting: integration into electrical panel
• Dimensions: 142 x 38 x 38 mm