Reliable Type 2 AC Surge Protection for Distribution Circuits
LY1-C40/1(S) is a single-pole pluggable Type 2 AC surge protective device designed for low-voltage distribution boards and equipment panels. Its high-energy MOV module provides fast transient-voltage limitation with 20kA nominal discharge current, 40kA maximum discharge current, and a replaceable cartridge for easier maintenance.
Class II / Type 2 protection for low-voltage AC circuits
20kA In and 40kA Imax surge discharge capability
75V to 440V AC versions for different system requirements
Pluggable cartridge with visual indication and optional remote contact
Suitable Applications
LY1-C40/1(S) is suitable for low-voltage AC circuits requiring modular Type 2 surge protection in distribution boards, control cabinets, and equipment power systems.
Distribution Boards
For Type 2 surge protection in residential, commercial, and industrial distribution boards.
Control Cabinets
Suitable for machinery controls, automation cabinets, HVAC systems, and equipment panels.
Commercial Power Systems
Helps protect offices, retail facilities, and building electrical systems from transient overvoltage.
Solar AC Panels
For solar inverter AC-side panels when the selected Uc rating matches the system voltage.
FAQ
Common questions about LY1-C40/1(S) single-pole pluggable Type 2 AC surge protective device selection and installation.
What is LY1-C40/1(S) used for?
LY1-C40/1(S) is used to limit transient overvoltage in low-voltage AC distribution circuits. It can be installed as a single-pole protection module or combined with matching modules for a multi-pole arrangement.
Is LY1-C40/1(S) a Type 2 SPD?
Yes. LY1-C40/1(S) is classified as a Class II / Type 2 AC surge protective device for low-voltage distribution systems.
What discharge current ratings does it provide?
It provides 20kA nominal discharge current In, 40kA maximum discharge current Imax, and a listed 7kA impulse-current rating.
What voltage options are available?
Maximum continuous operating voltage options include 75V, 150V, 275V, 320V, 385V, and 440V AC. The correct version must be selected according to the nominal system voltage.
What is the benefit of the pluggable design?
The replaceable cartridge allows the surge module to be inspected or replaced without removing the permanently wired base, reducing maintenance time.
What should be confirmed before ordering?
Confirm the nominal system voltage, required Uc and Up level, pole configuration, 125A maximum backup-fuse coordination, conductor size, DIN-rail space, and remote-contact requirement.
