Product Description

The Schneider Electric SEL8F450 is a high-performance surge protective device designed specifically for use within Acti9 KQ II load centres. This 1 pole plus neutral (1P+N) Type 2+3 SPD protects electrical installations in industrial, commercial and tertiary buildings against indirect lightning strikes and transient overvoltages.

Featuring an integrated surge-adapted backup fuse, the SEL8F450 ensures enhanced safety and continuity of service. A clear front-facing visual indicator displays green when the device is operational and red when replacement is required, enabling quick and simple inspection without specialist tools.

The plug-on design allows rapid installation directly onto the KQ II load centre chassis, making it ideal for modern distribution boards where speed, reliability and compliance are essential.

Key Features

• Type 2 + 3 surge protection for distribution boards
• Designed for Acti9 KQ II load centres
• 1P+N configuration for single-phase installations
• Integrated surge-adapted backup fuse
• Nominal discharge current of 20kA
• Maximum discharge current up to 40kA (L-N) and 65kA (N-PE)
• Plug-on mounting for fast installation
• Clear green/red visual status indicator
• Compatible with TT, TN-S and TN-C-S earthing systems

Technical Specification

• Range: Acti9
• Product Name: Load Centre KQ II A
• Device Type: Surge arrester with pluggable cartridge
• Surge Arrester Class: Type 2 + 3
• Poles: 1P + N
• Rated Operational Voltage: 230/240V AC, 50/60Hz
• Maximum Continuous Operating Voltage: 340V (L-N), 305V (N-PE)
• Nominal Discharge Current: 20kA (L-N)
• Maximum Discharge Current: 40kA (L-N), 65kA (N-PE)
• Voltage Protection Level (Up): <1.5kV
• Short-Circuit Withstand: 25kA
• Surge Technology: MOV + GDT
• Mounting: Plug-on (chassis)
• IP Rating: IP20
• IK Rating: IK05
• Operating Temperature: –40°C to +85°C
• Dimensions (H × W × D): 136 × 18 × 83 mm
• Weight: 148 g
• Colour: White (RAL 9003)

Data Sheet

Download the Schneider Electric SEL8F450 data sheet (PDF)

Instruction Manual

View the Schneider Acti9 KQ surge protection brochure