Reliable Type 2 AC Surge Protection for Low-Voltage Systems
LY1-C40/4(S) is a Type 2 AC surge protective device designed for low-voltage AC distribution systems. It helps limit transient overvoltage and protect electrical equipment in power cabinets, distribution boards, industrial control systems, and commercial electrical installations.
Type 2 AC SPD for low-voltage distribution protection
20kA nominal discharge current and 40kA maximum discharge current
Available with optional remote signalling contact for status monitoring
35mm DIN-rail mounting for quick installation in electrical panels
Suitable Applications
LY1-C40/4(S) is suitable for AC power systems where surge protection is required for distribution equipment, electrical panels, and sensitive loads.
AC Distribution Boards
For protecting low-voltage AC distribution boards from transient surge events.
Power Cabinets
Suitable for installation in industrial power cabinets and control panels.
Commercial Buildings
Helps protect commercial electrical systems, office buildings, and facility power distribution.
Solar AC Side Protection
Can be used in AC-side protection panels where the selected voltage and system design match the SPD rating.
FAQ
Common questions about LY1-C40/4(S) AC surge protective device selection and application.
What type of surge protection does LY1-C40/4(S) provide?
LY1-C40/4(S) is a Type 2 AC surge protective device designed for low-voltage AC systems. It helps limit transient overvoltage and protect downstream electrical equipment.
What voltage options are available?
Available voltage options include 75V, 150V, 275V, 320V, 385V, and 440V AC. The correct voltage rating should be selected according to the system voltage and protection requirement.
What is the discharge current rating?
The nominal discharge current In is 20kA and the maximum discharge current Imax is 40kA, tested with an 8/20μs surge waveform.
Does this model support remote signalling?
Yes. The “S” version includes a floating remote signalling contact for status indication. Models without “S” do not include remote signalling contact.
Can LY1-C40/4(S) be mounted on a DIN rail?
Yes. LY1-C40/4(S) is designed for standard 35mm DIN-rail mounting, making it suitable for distribution boards, cabinets, and electrical panels.
What should be confirmed before ordering?
Please confirm system voltage, pole number, protection mode, remote signalling requirement, installation space, backup fuse, and applicable standard before ordering.
