Compact Type 2+3 AC Surge Protection for 1P+N Systems
LY1-D20/1(S)+1 is a compact 1P+N pluggable Type 2+3 AC surge protective device for single-phase plus neutral systems. Its coordinated MOV and GDT structure provides L-N and N-PE protection with 10kA nominal discharge current and 20kA maximum discharge current, making it suitable for downstream and final-distribution protection.
Class II+III / Type 2+3 protection for downstream AC circuits
1P+N configuration with L-N and N-PE protection
Coordinated MOV and GDT surge-protection technology
Pluggable modules with status indication and optional remote contact
Suitable Applications
LY1-D20/1(S)+1 is suitable for compact single-phase plus neutral systems requiring coordinated Type 2+3 surge protection close to downstream equipment.
Residential Panels
For single-phase residential distribution boards and household consumer units.
Compact Control Panels
Suitable for small machinery, automation controls, HVAC panels, and equipment cabinets.
Office Power Circuits
Helps protect office distribution circuits, electronic loads, and commercial equipment.
Solar Inverter AC Boxes
For single-phase solar inverter AC-side boxes when the selected Uc rating matches the system.
FAQ
Common questions about LY1-D20/1(S)+1 compact 1P+N pluggable Type 2+3 AC surge protective device selection.
What is LY1-D20/1(S)+1 used for?
LY1-D20/1(S)+1 is used for downstream and final-distribution surge protection in single-phase plus neutral AC systems. It helps limit transient overvoltage through coordinated L-N and N-PE protection paths.
Is this a single-pole or 1P+N SPD?
It is a 1P+N SPD for single-phase plus neutral systems. The product uses separate L-N and N-PE protection paths rather than a basic single-pole-only arrangement.
Is LY1-D20/1(S)+1 a Type 2 or Type 3 SPD?
LY1-D20/1(S)+1 is classified as Class II+III / Type 2+3, making it suitable for coordinated downstream and final-distribution surge protection.
What protection technology does it use?
It combines a high-energy MOV on the L-N path with a GDT on the N-PE path, providing coordinated surge suppression for single-phase plus neutral systems.
What discharge current ratings does it provide?
It provides 10kA nominal discharge current and 20kA maximum discharge current on both the L-N and N-PE protection paths.
What should be confirmed before ordering?
Confirm the nominal L-N voltage, required Uc and Up level, 1P+N wiring arrangement, 125A maximum backup-fuse coordination, conductor size, DIN-rail space, and optional remote-contact requirement.
