The Schneider Electric A9L16449 is an Acti9 iPRD8 modular surge arrester with pluggable cartridge, 3 poles, rated for 400 V AC (+/- 10%) at 50/60 Hz. It is a Type 2 + 3 arrester using MOV technology, meaning it handles both main distribution board surges (Type 2) and downstream equipment-level protection (Type 3) in a single unit. Key ratings: nominal discharge current 2.5 kA common mode (L/PE and N/PE), maximum discharge current 8 kA L/PE, total discharge current 25 kA. The maximum continuous operating voltage (Uc) is 340 V L/PE, with a voltage protection level (Up) under 1 kV for Type 3 common mode L/PE. Open circuit voltage (Uoc) is 10 kV for Type 3. It clips onto a DIN rail (clip-on mounting) and fits a 54 mm wide, 81 mm high, 69 mm deep footprint — 6 modules of 9 mm pitch. The white (RAL 9003) housing uses tunnel-type terminals accepting 2.5 to 35 mm² wire, with a tightening torque of 2.5 N·m.
Standards, approvals, and earthing
Compliant with EN 61643-11 and IEC 61643-11, carrying quality labels NF, KEMA-KEUR, and OVE. The arrester is designed for TN-C earthing systems. IK degree of protection is IK03 per IEC 62262, meaning it withstands impact energy of 0.35 J.
Installation context
Designed for distribution panels on DIN rail. The associated circuit breaker options listed for this arrester are IC60N, iC60H, or iC60L — all 20 A curve C, with Icu ratings of 10 kA, 15 kA, and 25 kA respectively. This breaker must be wired upstream to protect the arrester and isolate it for cartridge replacement. Operating temperature range is -25 to 60 °C, storage -40 to 85 °C, with relative humidity 5 to 90%. Maximum operating altitude is 2000 m. These environmental limits define where the unit can be installed without derating.