Power distributor DDB-4B125

DIN rail

Overview
Four-pole distribution block 125 A with 7, 11 or 15 connections – lateral entry

Electrical characteristics

• Rated current: 125 A
• Rated voltage: 690 V AC
• Number of poles: 4
• Number of connections per pole and hole diameters:
  • DDB-407B125 – 7 connections: 1 x Ø9.5 mm / 5 x Ø5.5 mm / 1 x Ø7.5 mm
  • DDB-411B125 – 11 connections: 1 x Ø9.5 mm / 7 x Ø5.5 mm / 3 x Ø7.5 mm
  • DDB-415B125 – 15 connections: 1 x Ø9.5 mm / 11 x Ø5.5 mm / 1 x Ø7.5 mm / 2 x Ø8.5 mm
• Cable cross-sections:
  • For Ø9.5 mm: flexible with ferrules 10–35 mm² / solid 10–35 mm²
  • For Ø8.5 mm: flexible with ferrules 10–25 mm² / solid 10–35 mm²
  • 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 (except for Ø9.5 mm: 6–7 Nm)
• Short-circuit peak current (Ipk): 30 kA
• Short-circuit peak current (Ipk) DDB-415B125: 21 kA
• Short-time withstand current (Icw): 4.5 kA

Physical

• Entry: lateral entry
• Conductive block: high-conductivity copper
• Screws: zinc-plated steel
• Enclosure: PA66-V0 base RAL7035 with removable translucent grey cover
• Mounting: DIN rail or surface-mounted
• Protection: IP20
• Insulation: insulating plate between poles and on the enclosure bottom to isolate the DIN rail
• Dimensions (L x H x D): 109 x 90 x 50 mm (DDB-407B125); 147 x 90 x 50 mm (DDB-411B125); 182 x 90 x 50 mm (DDB-415B125)

Features

• Secure and efficient power distribution for three-phase networks with neutral
• Lateral connection for easier access to terminals and simplified wiring in compact panels
• High-conductivity copper block for even current distribution and reduced losses
• Construction ensuring resistance to electrical and thermal stress

Applications

• Professional electrical installations, commercial and industrial switchboards
• Energy redistribution to multiple three-phase circuits with neutral
• Electrical cabinets with limited frontal access and multi-feed systems

Usage advice

• Respect recommended cable cross-sections for each terminal type to ensure safe contact and limit heating
• Apply the indicated tightening torque for each terminal diameter
• Install on DIN rail or surface-mounted according to panel configuration
• Disconnect power before any intervention to ensure safety
• Use ferrules for flexible conductors to ensure reliable connections and prevent oxidation
• Regularly check terminal tightening and mechanical integrity
• Do not exceed the indicated Ipk and Icw values

Variants and ordering codes
Code | Pole count | Rated current | Rated voltage (Un) | Number of outputs | Stock status
DDB-407B125 | Four-pole | 125 A | 690 V | 7 | instock
DDB-411B125 | Four-pole | 125 A | 690 V | 11 | instock
DDB-415B125 | Four-pole | 125 A | 690 V | 15 | instock

Documents
Product range brochure available for download (product datasheet PDF).

Technical specifications

• Rated current: 125 A
• Rated voltage: 690 V AC
• Poles: 4 (four-pole)
• Connections available: 7 / 11 / 15 depending on variant
• Conductive material: high-conductivity copper
• Protection rating: IP20
• Mounting: DIN rail or surface-mounted
• Short-circuit peak current (Ipk): 30 kA (21 kA for DDB-415B125)
• Short-time withstand current (Icw): 4.5 kA
• Dimensions: see variants (109 x 90 x 50 mm; 147 x 90 x 50 mm; 182 x 90 x 50 mm)