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    Item No.: LY1-12.5/1(S)

    LY1-12.5/1(S)Pluggable Single-Pole SPD

    Description：

    Classl·Classll·Type 1.Type 2
    Location of Use: Main Distribution Boards
    Mode of Protection: L-PE, N-PE
    Surge Ratings: lim, = up to 12.5 kA (10/350 μs)l,= up to 20 kA (8 /20 μs)
    IEC/EN/UL Category: Class I+ll /Type 1+2
    Protective Elements: High Energy MOV
    Housing: Pluggable Design
    Compliance: lEC 61643-11:2011
    EN 61643-11:2012
    UL 1449 4th Edition

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      We are a professional 50kA 1 pole AC surge protective device manufacturer, producing compact and reliable SPDs for single-phase 230V AC networks. As an experienced factory, we provide OEM, wholesale, and bulk buy services to electrical wholesalers and system integrators worldwide.

      Built with a graphite (C) shell, rated IP65, and mounted on a 35mm DIN rail, it ensures convenient installation and high safety. Each unit is CE certified and backed by a 2-year warranty.

      We also provide OEM design and bulk order services, making this SPD ideal for wholesalers who require reliable, cost-effective surge protection directly from the manufacturer.

      Applicable scenarios / Application industries

      The 50kA 1P SPD uses a high-quality MOV (ZnO) varistor, delivering fast surge response and long endurance. Its design is optimized for residential and light industrial applications, offering strong protection against transient overvoltage from power switching or lightning.

      Electrical Characteristics
      SPD type 1+2+3
      Network 230/400 V 3-phase+N
      AC system TT-TNS
      Nominal line voltage Un 230/400 Vac
      Max. AC operating voltage Uc 275 Vac
      Temporary Over Voltage (TOV) Charasteristics – 5 sec. Without disconnection UT 335 Vac withstand
      Temporary Over Voltage (TOV) Charasteristics – 120 mn Without disconnection or with safety disconnection
      Temporary Over Voltage N/PE (TOV HT) Without disconnection or with safety disconnection UT 1.2 kV/300A/200 ms withstand
      Residual Current Leakage current to Ground Ipe None
      Follow current If None
      Nominal discharge current 15 x 8/20 µs impulses In 20 kA
      Max. discharge current max. withstand @ 8/20 µs by pole Imax 50 kA
      Impulse current by pole max. withstand 10/350µs by pole Iimp 12.5 kA
      Total lightning currentmax. total withstand @ 10/350µs Itotal 50 kA
      Withstand on Combination waveform IEC 61643-11 Class III test: 1.2/50µs – 8/20µs Uoc 6 kV
      Withstand on overvoltages IEEE C62.41.1 20 kV
      Specific energy by pole max. withstand 10/350 µs W/R 40 kJ/ohm
      Connection mode(s) L/N and N/PE
      Protection mode(s) Common/Differential mode
      Protection level L/N @ In (8/20µs) Up L/N 1.5 kV
      Protection level L/PE @ In (8/20µs) Up L/PE 1.5 kV
      Residual voltage L/N at 5 kA @ 5 kA (8/20µs) Up-5kA 0.7 kV
      Mechanical Characteristics
      Technology VG Technology (MOV+GSG)
      SPD configuration 3-phase+Neutral
      Connection to Network By 40mm busbar and wire for PE: 6-35mm² (50mm²)
      Format Plug-in modular box
      Mounting 40 mm busbar systems
      Housing material Thermoplastic UL94 V-0
      Operating temperature Tu -40/+85°C
      Outdoor application IP20
      Failsafe modem No
      Disconnection indicator Disconnection from AC network
      Remote signaling of disconnection 1 mechanical indicator by pole
      Dimensions Yes
      Weight See diagram
      Disconnectors 0.7401 kg
      Thermal disconnector Internal
      Installation ground fault breaker Type ‘S’ or delayed
      Fuses max. 315 A (gL/gG)
      Standards
      Standards compliance IEC 61643-11 / EN 61643-11 / UL1449 4ed.

      ■ Internal Configuration


      ■ Dimensions & Packaging


      ■ Connection Diagram

      FAQ for LY1-12.5/1(S)Pluggable Single-Pole SPD

      1. What is the main advantage of the LY1-12.5/1(S) pluggable SPD?
      It features a replaceable pluggable surge module, making maintenance fast and cost-effective without removing wiring from the base.

      2. What protection components are used inside this SPD?
      This model uses MOV components that deliver reliable clamping against AC transient overvoltage events.

      3. What certification and standards does this SPD follow?
      It is produced in accordance with IEC 61643-11:2011 and EN 61643-11:2022, and certified with CE and TUV.

      4. What installation method does the LY1-12-51S support?
      It uses 35 mm DIN-rail mounting, suitable for AC power distribution boxes and equipment cabinets.

      5. Can the surge module be replaced in the field?
      Yes, the pluggable design allows quick removal and replacement of the surge module without disconnecting the base wiring.

      6. Is OEM and wholesale supply available?
      Yes, we provide OEM/ODM, private labeling, and factory-direct bulk supply for distributors.

      7. What type of applications is this SPD ideal for?
      The single-pole design is suitable for AC single-phase loads, lighting circuits, small control panels, and equipment power inputs.

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      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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      We know that every business is unique, so we offer customized services to ensure that our products perfectly match your specific needs:

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