Live Electrical SC440 4 Pole 20kA/40kA Type 2 SPD Surge Protective Device

Type 2 SPD for TN-S and TT Systems

4 Pole 20kA/40kA Type 2 Surge Protective Device – Live Electrical SPD

The Live Electrical 4 Pole 20kA/40kA Type 2 SPD offers reliable protection against transient overvoltages in three-phase TN-S and TT systems. It helps shield your distribution board and connected devices from electrical surges caused by internal switching or indirect lightning strikes.

With a nominal discharge capacity of 20kA and a maximum of 40kA, this SPD is ideal for domestic and commercial setups that need solid protection without over-specification. It installs easily into consumer units and TPN boards, providing dependable performance where space and budget are considerations.

⚙️ Key Features – SPD for 3-Phase Boards

• Type 2 Protection – For indirect lightning and switching surges
• 4 Pole Configuration – Suitable for TN-S and TT 3-phase systems
• Nominal Discharge – 20kA (max: 40kA) with 8/20 μs waveform
• Low Residual Voltage – 1.3kV at 5kA; 1.5kV at 20kA
• Voltage Rating – 230/380V, withstands up to 440/640V
• Short-Circuit Capacity – 25kA admissible fault current
• Fuse Requirement – Up to 125A gG type
• Compliance – Meets BS EN 61643-11
• Temperature Range – Operates from -40°C to +85°C
• IP Rating – IP20 for internal panel installations

Summary – 4 Pole Type 2 Surge Protective Device

The Live Electrical 4 Pole 20kA/40kA SPD protects TN-S and TT installations from harmful voltage surges. It combines Type 2 protection with easy installation, reliable operation, and compliance with BS EN 61643-11 standards.

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4 Pole Type SPDs