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    Item No.: LY1-C40/4(S)

    LY1-C40/4(S) SURGE PROTECTION DEVICE

    Description：

    1)2) and 3)4) are same product with different type name
    With “+1″ have MOV and GDT, protection mode (TN-S, TT),
    Without “+1″ only have MOV, protection mode (TN-S,TN-C)
    With “S”: have floating remote signalling contact
    Without “S”: have no floating remote signalling contact
    Device length is 90mm, height is 81mm, width from 1P to 4P (18, 36, 54, 72)mm

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      Our 40kA 4 pole AC surge protective device provides complete protection for three-phase + neutral (4P) systems.
      Utilizing MOV ZnO varistors, it ensures reliable clamping voltage control and high surge endurance.
      The robust housing, built from PVC/PA66/PBT, meets industrial flame-retardant and insulation standards.
      Compliant with IEC 61643-11:2011 / EN 61643-11:2022, and approved by CE & TUV.
      We are a trusted manufacturer, supplier, and factory, offering OEM/ODM customization, wholesale, and in bulk orders.

      Applicable scenarios / Application industries

      The device supports 35mm DIN rail mounting, ideal for industrial power cabinets, solar protection panels, and combiner boxes.

      ■ Technical Data
      IEC Electrical 75 150 275 320 385 440
      Nominal AC Voltage (50/60Hz) Uo/ Un 60 V 120 V 230 V 230 V 230 V 400 V
      Maximum Continuous Operating Voltage (AC) Uc 75 V 150 V 275V 320 V 385 V 440 V
      Nominal Discharge Current (8/20 μs) In 20 kA 20 kA 20 kA 20 kA 20 kA 20 kA
      Maximum Discharge Current (8/20 μs) Imax 40 kA 40 kA 40 kA 40 kA 40 kA 40 kA
      Voltage Protection Level Up 0.4 kV 1 kV 11.5 kV 1.6 kV 1.8 kV 2 kV
      Impulse Current (10/350μs) Iimp (L-N) 7kA
      Response Time tA < 25 ns
      Back-Up Fuse (max) 125 A gL / gG
      Short-Circuit Current Rating (AC) ISCCR 25kA/50kA
      TOV Withstand 5s UT 90V 180V 335V 335V 335V 580V
      TOV 120min UT 115V 230V 440V 440V 440V 765V
      mode Withstand Withstand Safe Fail Safe Fail Safe Fail Safe Fail
      Mechanical & Environmental
      Operating Temperature Range Ta -40ºF to +158ºF [-40ºC to +70ºC]
      Permissible Operating Humidity RH 5%…95%
      Atmospheric pressure and altitude 80k Pa … 106k Pa / -500 m…… 2000 m
      Terminal Screw Torque Mmax 39.9 Ibf·in[4.5 Nm]
      Conductor Cross Section (max) 2 AWG (Solid, Stranded) / 4 AWG (Flexible)
      35 mm² (Solid, Stranded) / 25 mm²(Flexible)
      Mounting 35 mm DIN Rail, EN 60715
      Degree of Protection IP 20 (built-in)
      Housing Material Thermoplastic: Extinguishing Degree UL 94 V-0
      Thermal Protection Yes
      Operating State / Fault Indication Green ok / Red defect
      Remote Contacts (RC)
      RC Switching Capacity
      RC Conductor Cross Section (max)      		 Optional
      AC: 250V / 0.5 A; DC: 250V / 0.1 A;125V / 0.2 A;75V / 0.5 A
      16 AWG (Solid) / 1.5 mm²(Solid)

      ■ Internal Configuration


      ■ Dimensions & Packaging


      ■ Connection Diagram

      FAQ for LY1-C40/4(S) SURGE PROTECTION DEVICE

      1.What type of protection does the LY1-C40/4(S) provide?
      The LY1-C40/4(S) is a robust AC surge protection device designed for Type 2 surge protection in low-voltage AC systems, using high-performance MOV modules.

      2.Is this product suitable for residential and commercial systems?
      Yes. Its versatile design makes it suitable for homes, commercial power panels, office buildings, and general electrical distribution environments.

      3.Which compliance standards does the LY1-C40 meet?
      The device is manufactured following IEC 61643-11:2011 / EN 61643-11:2022, and is certified with CE & TUV, ensuring safe global deployment.

      4.What core components are used in this SPD?
      It uses MOV surge elements with high surge endurance, designed for environments with frequent transient overvoltage.

      5.Can this SPD be mounted on a DIN rail?
      Yes. The LY1-C40/4(S) is compatible with standard 35 mm DIN rails, making installation fast and convenient.

      6.What applications is the LY1-C40/4(S) best suited for?
      It is commonly used in distribution boards, AC mains in commercial facilities, industrial control systems, and sensitive equipment protection.

      7.Do you support OEM/ODM manufacturing for this model?
      Yes. As a professional surge protective device factory, we provide OEM/ODM service, bulk manufacturing, custom labeling, and customized electrical parameters.

      Start Customizing Now

      We offer a full range of customised services, working closely with our customers every step of the way, from concept design to final delivery.

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