Surge Protector pro tec BY1-B+C 4P 4-pole B+C (I+II) model 3212040

pro tec BY1-B+C 4P (model 3212040) is a four-pole surge protection device that provides combined B and C class protection (stages I and II) for electrical distribution systems. Designed for installation in distribution boards, this unit protects both phase conductors and the neutral conductor against transient overvoltages originating from lightning impulses and switching events. Its four-pole topology ensures coordinated protection across all live conductors in residential, commercial and light industrial installations.

Advantages

The device offers coordinated two-stage surge protection that reduces residual overvoltage and improves the safety of connected equipment. Its four-pole design covers phase and neutral conductors, eliminating the need for separate neutral protection components. The compact form factor is suitable for DIN-rail mounting in standard distribution enclosures, and the combined B+C characteristics allow it to handle high-energy impulses while providing effective follow-up protection for common transient events.

Suitable for

• Residential distribution boards where protection of appliances and wiring is required
• Small commercial electrical installations such as offices and retail units
• Light industrial panels with sensitive electronic equipment
• Buildings with combined phase and neutral surge protection needs

Key specifications

• Configuration: four-pole protection covering all phase conductors and neutral
• Protection stages: combined primary and secondary surge protection (B and C class)
• Application: installation in electrical distribution boards on DIN-rail
• Protection type: transient overvoltage suppression for lightning and switching surges
• Typical use case: residential, commercial and light industrial electrical systems

How to use

Install the unit on the DIN-rail inside the distribution board according to local electrical codes and the manufacturer's installation instructions. Connect the phase conductors and neutral to the corresponding terminals, ensuring tight and secure connections and correct polarity. The device should be positioned to provide coordinated protection with upstream main protection and downstream branch circuit breakers; verify compatibility with system earthing arrangements before commissioning. After installation, periodically inspect visual indicators (if present) and wiring integrity as part of routine electrical maintenance.

Usage recommendations

Place the surge protector close to the main incoming supply or distribution point to ensure effective clamping of transient voltages. Ensure the device is combined with appropriate upstream overcurrent protection and that earthing/grounding connections comply with applicable standards. Replace the unit after sustained lightning strikes or if visual status indicators show impaired functionality.