Compact Type 1+2 AC Surge Protection for 1P+N Systems
LY1-C40M/1(S)+1 is a compact pluggable Type 1+2 AC surge protective device for single-phase plus neutral systems. It combines fast L-N surge limitation with high-energy N-PE discharge capability, helping protect compact distribution boards and connected electrical equipment against lightning impulses and transient overvoltage.
Compact 1P+N configuration for single-phase distribution systems
7kA L-N and 25kA N-PE impulse discharge capability
20kA nominal and 40kA maximum discharge current
Pluggable modules with visual indication and optional remote contact
Suitable Applications
LY1-C40M/1(S)+1 is suitable for compact single-phase plus neutral AC systems requiring coordinated Type 1+2 surge protection between L-N and N-PE.
Compact Distribution Boards
For incoming surge protection in compact single-phase plus neutral distribution panels.
Residential Panels
Suitable for residential service panels, smart-home cabinets, and modular consumer units.
UPS and Energy Storage
For UPS and energy-storage AC circuits when voltage and protection configuration match the system.
Solar Inverter AC Output
For single-phase solar inverter AC output panels when the selected voltage version matches the installation.
FAQ
Common questions about LY1-C40M/1(S)+1 compact 1P+N pluggable Type 1+2 AC surge protective device selection.
What is LY1-C40M/1(S)+1 used for?
It is used for compact Type 1+2 surge protection in single-phase plus neutral AC systems, with coordinated protection between L-N and N-PE.
Is this a single-pole SPD?
The model is designed as a 1P+N protection assembly. It includes an L-N protection path and a separate N-PE protection path rather than operating as a simple standalone single-pole module.
What surge ratings does this SPD provide?
It provides 20kA nominal discharge current and 40kA maximum discharge current. Its impulse discharge current is 7kA on the L-N path and 25kA on the N-PE path.
What voltage options are available?
Available L-N maximum continuous operating voltage options are 75V, 150V, 275V, and 320V AC. The N-PE continuous operating voltage is 255V.
What is the benefit of the compact pluggable design?
The compact format reduces DIN-rail space, while the pluggable modules simplify inspection and replacement without removing the complete wired base.
What should be confirmed before ordering?
Confirm the L-N system voltage, 1P+N circuit arrangement, N-PE protection requirement, 63A maximum backup fuse, conductor size, DIN-rail space, and remote-contact requirement.
