Schneider SEL8F450 - Surge Arrester Pluggable Cartridge - Acti9, iKQ 1P+N KQ II, 20kA, Type 2+3 With Fuse

Product Overview

The Schneider Electric SEL8F450 Acti9 iKQ 1P+N Type 2+3 Surge Arrester is a high-performance surge protection device designed for dependable single-phase protection within KQ II load centres. Engineered to defend electrical installations against transient overvoltages caused by indirect lightning strikes, switching disturbances, and supply fluctuations, this modular SPD provides long-term reliability for commercial, industrial, and tertiary applications.

Built with a compact plug-on design, the Acti9 iKQ delivers a space-efficient solution that integrates seamlessly into KQ II load centre assemblies. It supports safe, fast installation without complex wiring, and its self-protected construction—featuring a built-in surge-adapted backup fuse—eliminates the need for an external disconnector. This ensures compliance with BS EN 61643-11:2012+A11:2018 while simplifying system configuration for installers.

With Type 2+3 combined protection, the device offers robust suppression of direct and indirect transient events, maintaining stability and safeguarding sensitive equipment across the installation. The inclusion of a pluggable cartridge design allows rapid replacement when required, minimising downtime and ensuring consistent surge protection performance.

A front-face green/red visual indicator gives immediate confirmation of operational condition. When the device reaches end of life, the indicator flags red, signalling that the cartridge must be replaced. This intuitive monitoring feature supports efficient maintenance and avoids unnecessary system checks.

Suitable for TT, TN-S, and TN-C-S earthing arrangements, the Schneider Acti9 iKQ 1P+N surge arrester is ideal for modern single-phase applications where reliability, safety, and compliance are essential.

Key Features

• Provides reliable protection against transient overvoltages from lightning activity and switching disturbances, ensuring long-lasting system resilience.
• The built-in surge-adapted fuse removes the need for an external disconnector, streamlining installation and reducing panel space requirements.
• A clear green/red flag shows the health of the device, offering immediate status verification without the need for diagnostic instruments.
• Supports rapid and safe cartridge replacement, helping maintain continuous protection for the installation.
• Fully suitable for TT, TN-S, and TN-C-S systems, making it versatile across commercial, industrial, and service-sector applications.

Technical Specification

• Configuration: 1P+N Modular Device
• Nominal Discharge Current (In): 20kA (L–N) / 40kA (N–PE)
• Maximum Discharge Current (Imax): 40kA (L–N) / 65kA (N–PE)
• Voltage Protection Level (Up): 1.5kV (L–N & N–PE)
• Operating Voltage: 230/240V AC, 50/60Hz
• Uc Rating: 340V (L–N), 305V (N–PE)
• Operating Temperature: –40°C to +85°C
• IP Rating: IP20 (wired)
• Dimensions: 18(W) × 136(H) × 83(D) mm
• Weight: 148g
• EAN: 360648769556

Why Choose the Schneider Electric Acti9 iKQ 1P+N Surge Arrester?

The Acti9 iKQ 1P+N surge arrester is purpose-built for dependable protection of modern electrical installations. Its plug-on modular format makes it exceptionally easy to install within KQ II load centres, while its integrated backup fuse and cartridge-based design reduce maintenance time and future servicing costs.

Backed by Schneider Electric’s robust engineering and conformity with BS EN 61643-11 standards, the device offers long-term durability and consistent surge suppression performance. From commercial buildings to light industrial facilities, the Acti9 iKQ provides an efficient, reliable, and fully compliant solution for safeguarding single-phase electrical networks.