Distribution block Simet SIMBLOCK SUB 400 (81651002) – universal Al/Cu, grey

Simet SIMBLOCK SUB 400 is a universal Al/Cu distribution block designed to provide a safe and reliable electrical connection between aluminium and copper conductors. Housed in a grey insulating body, the block supports bi-metallic termination methods to reduce the risk of galvanic corrosion when joining dissimilar metals and is intended for use in distribution boards, service junctions and general wiring installations in industrial and residential environments.

Advantages

The SIMBLOCK SUB 400 offers a compact and robust solution for combining aluminium and copper conductors in one terminal point, with construction materials chosen to minimise contact corrosion and ensure stable conductivity. Its universal design simplifies installation across different conductor types, and the grey insulated enclosure provides mechanical protection and basic electrical insulation for internal connections.

Suitable for

• Distribution panels and consumer units where Al and Cu conductors meet
• Service junctions and repair points on electrical feeders
• Industrial and residential wiring systems requiring a bi-metallic termination
• Retrofitting or upgrading existing installations with mixed-metal conductors

When it may not be suitable

This distribution block is intended specifically for combining aluminium and copper conductors; it may not be suitable where only specialised high-current busbar systems, bespoke terminal blocks with integrated fusing, or where IP-rated external enclosure protection is required. For applications exposed to corrosive environments, high mechanical stress, or outdoor installation without additional protection, an enclosure or a product with a higher environmental rating should be considered.

Key specifications

• Universal Al/Cu compatibility for bi-metallic termination
• Insulated grey housing for mechanical protection and basic electrical insulation
• Compact form factor suitable for panel mounting
• Designed for use in distribution boards, junctions and general wiring

How to use

Mount the SIMBLOCK SUB 400 in the distribution panel or junction box according to available mounting points and align conductor entry so that aluminium and copper conductors are placed in their respective clamping zones. Strip conductor insulation to the recommended length, insert conductors fully and tighten terminal screws to the torque value recommended for the conductor type and cross-section. Verify tightness and electrical continuity after installation and, if necessary, apply appropriate corrosion-inhibiting compounds at the bi-metallic joint following local regulations and best practices.

What to consider before purchase

• Confirm compatibility with conductor cross-sections and the intended installation layout
• Check mounting space and panel arrangement to ensure proper fit
• Assess environmental conditions (indoor vs outdoor, presence of corrosive agents)
• Ensure required torque values and installation tools are available for secure termination

Usage recommendations

Use appropriate torque settings and, where applicable, anti-oxidant compounds for aluminium conductors. Perform post-installation checks for mechanical tightness and electrical continuity. For installations in demanding environments, combine the block with a protective enclosure or choose a product with a suitable environmental protection rating.