4 Pole MCBs for Three Phase & Neutral Protection

4 pole MCBs are used where a circuit requires overcurrent protection across three phases plus neutral. They are commonly specified on three-phase distribution systems, sub-mains, plant equipment, and other installations where a standard 3 pole device may not provide the required switching arrangement.

These devices are typically chosen for commercial and industrial applications where full phase and neutral disconnection is part of the protection or isolation strategy.

Compared with a standard 3 pole MCB, a 4 pole device adds neutral switching, which can be important on certain distribution circuits, plant setups, and mixed-load systems. This makes them a practical choice where the installation design requires a combined phase-and-neutral protective device rather than live pole switching alone.

• Three phase + neutral switching – for circuits requiring 4 pole protection
• B and C curve options – to suit different load and inrush characteristics
• Suitable for distribution boards and sub-mains – in commercial and industrial environments
• Used on plant and equipment circuits – where a 4 pole arrangement is preferred
• DIN-rail format – for integration into multi-module boards and panels

Need related three-phase protection products? Browse our 3 pole MCBs, three phase range, and three phase boards & accessories. For delivery and returns, see our delivery information and returns policy.