Product Description

The Schneider Electric SEL8F492 is a replacement surge protection cartridge designed for use with Acti9 iPRD iKQ surge protective devices installed within KQ II load centres. Suitable for both 1P+N and 3P+N configurations, this Type 2+3 cartridge provides reliable protection against transient overvoltages in commercial, industrial and tertiary electrical installations.

Featuring an integrated surge-adapted backup fuse, the SEL8F492 operates in differential mode by connecting phase to neutral (L-N). A clear front-facing visual indicator shows green when the cartridge is operational and red when replacement is required, ensuring straightforward maintenance and compliance checks.

Designed for fast plug-in installation, this cartridge supports quick replacement without disturbing the main SPD assembly, helping to minimise downtime and maintain system protection.

Key Features

• Replacement cartridge for Acti9 iPRD iKQ surge protective devices
• Compatible with KQ II load centre A (single phase) and B (three phase)
• Type 2 + 3 surge protection
• Integrated surge-adapted backup fuse
• Nominal discharge current of 20kA
• Maximum discharge current up to 40kA (L-N)
• Plug-in design for rapid replacement
• Clear green/red visual status indicator
• Compatible with TT and TN-S earthing systems

Technical Specification

• Range: Acti9
• Device Type: Surge protection cartridge
• Device Short Name: iPRD iKQ
• Surge Arrester Class: Type 2 + 3
• Surge Technology: MOV
• Rated Operational Voltage: 240V AC, 50/60Hz
• Maximum Continuous Operating Voltage: 340V (L-N)
• Nominal Discharge Current: 20kA (L-N)
• Maximum Discharge Current: 40kA (L-N)
• Voltage Protection Level (Up): <1.5kV
• Open Circuit Voltage (Uoc): 6kV
• Short-Circuit Withstand: 25kA
• Mounting: Plug-in cartridge
• Dimensions (H × W × D): 45 × 18 × 58 mm
• Weight: 68 g
• Colour: White (RAL 9003)
• Operating Temperature: –40°C to +85°C

Data Sheet

Download the Schneider Electric SEL8F492 data sheet (PDF)

Instruction Manual

View the Schneider Acti9 KQ surge protection brochure