Reliable Type 2 AC Surge Protection for Two-Pole Circuits
LY1-C40/2(S) is a two-pole pluggable Type 2 AC surge protective device designed for low-voltage distribution boards and equipment panels. Its high-energy MOV modules help limit lightning-induced and switching overvoltage through L-PE and N-PE protection paths, while the replaceable cartridge design simplifies inspection and maintenance.
Class II / Type 2 surge protection for low-voltage AC systems
Two-pole design with L-PE and N-PE protection paths
20kA nominal and 40kA maximum discharge current
Pluggable cartridges with visual indication and optional remote contact
Suitable Applications
LY1-C40/2(S) is suitable for low-voltage AC systems requiring two-pole Type 2 surge protection through L-PE and N-PE protection paths.
Distribution Boards
For Type 2 surge protection in residential, commercial, and industrial AC distribution panels.
Control Cabinets
Suitable for machinery controls, automation cabinets, HVAC equipment, and electrical control systems.
Commercial Buildings
Helps protect office, retail, and building electrical systems against transient overvoltage.
Solar Inverter AC Panels
For solar inverter AC-side panels when the selected Uc version matches the system voltage.
FAQ
Common questions about LY1-C40/2(S) two-pole pluggable Type 2 AC surge protective device selection and installation.
What is LY1-C40/2(S) used for?
LY1-C40/2(S) is used to limit transient overvoltage in low-voltage AC distribution systems through two protection paths. It is suitable for distribution boards, control cabinets, commercial power systems, and equipment panels.
Is LY1-C40/2(S) a single-pole or two-pole SPD?
LY1-C40/2(S) is a two-pole SPD. The existing page title describing it as single-pole should be changed to two-pole.
Is this product a Type 2 SPD?
Yes. LY1-C40/2(S) is classified as a Class II / Type 2 AC surge protective device. The incorrect Type 1CA wording should not be used.
What discharge current ratings does it provide?
The SPD provides 20kA nominal discharge current In and 40kA maximum discharge current Imax. The technical table also lists a 7kA impulse-current parameter.
What voltage options are available?
Maximum continuous operating voltage options include 75V, 150V, 275V, 320V, 385V, and 440V AC. Select the appropriate version according to the nominal system voltage.
What should be confirmed before ordering?
Confirm the nominal voltage, Uc and Up requirements, two-pole protection arrangement, 125A maximum backup-fuse coordination, conductor size, DIN-rail space, and optional remote-contact requirement.
