Item No.: LYDS5/6/7 DC

LYDS5/6/7 DC ISOLATION SWITCHES

Description:

• Non-polarity DC Isolator Switch

• Modular design, optional 2-10 levels

• Positive contact or reverse contact optional

• Single Hole Mounting, Panel Mounting, Distribution Board, Door Clutch or Enclosure optional

• Dynamic sealing design and world class sealing materials guarantee an IP66 protection rate.

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    The LYDS5/6/7 DC Isolator Switch is a versatile DC disconnect solution series designed to handle a range of current ratings and pole configurations for comprehensive DC power isolation.

    🔹 Key Technical Knowledge

    • Product type: Series DC isolator switch (multiple current/pole variants)

    • Rated voltage: Compatible with typical DC power systems 600–1500V DC

    • Contacts: Positive break DC switch mechanism

    • Installation: Flexible mounting (panel/DIN rail depending on variant)

    • Compliance: IEC 60947-3 for DC isolation

    • Manufacturer role: OEM-ready DC isolator series producer

    🔹 Use Cases / Industries

    • Solar photovoltaic DC power isolation

    • Energy storage system DC isolation

    • Battery banks and DC distribution panels

    • Telecom DC power racks

    • Industrial DC switchgear cabins

    🔹 OEM & Manufacturing Advantage

    As a professional DC isolator switch series manufacturer, we provide bulk supply, OEM/ODM services, customizable ratings, and technical support for international distributors and panel builders.

    Technical Data

    Main     Parameters
    Model A 13 20 25 40 50
    Rated insulation voltage                Ui V 1500 1500 1500 1500 1500
    Rated thermal current                    Ith A 32 40 55 55 55
    Rated impulse withstand voltage         Uimp V 8000
    Rated short-time withstand current(1s) Icw A 780
    Rated short-time making capacity        Icm A 1200
    Maximum cable cross sections(ind.jumper)
    Solid or stranded mm² 4-16
    Flexible mm² 4-16
    Flexible (+multicore cable end) mm² 4-16
    Torque
    Tightening torque terminal screws M4. Nm 1.2-1.8
    Tightening torque single hole mounting nut M16 Nm 2.0-2.3
    Tightening torque knob screws M3 Nm 0.5-0.7
    Switching on oroff torque Nm 0.9-1.3
    General parameters
    Knob positions   12 o’clock OFF,3 o’cock ON(9 o’clock OFF,12 o’dock ON)
    Electrica Life Actual   3000 Cycles
    Standard   300 Cycles
    Mechanical Life Actual   10000 Cycles
    Standard   10000 Cycles
    Distance of contacts (per pole) mm   8
    Operation temperature   -40 to +85
    Store temperature   -40 to +85
    Pollution degree   3
    Overvoltage category   Ⅱ
    IP rating of shafte and mounting nut   IP66

    According to IEC/EN60947-3. Utilization category DC-PV1.

    Layers Voltage/current(DC-PV1)
    2/3/4/6/8/10 600Vdc   800Vdc 1000Vdc 1200Vdc   1500Vdc Model
    32   26 13 10   5 LYDS5(6)(7)XX/13/ZY
    40   30 20 12   6 LYDS5(6)(7)XX/20/ZY
    55   45 25 15   8 LYDS5(6)(7)XX/25/ZY
    /   50 40 30   20 LYDS5(6)(7)XX/40/ZY
    /   55 50 40   30 LYDS5(6)(7)XX/50/ZY
    4T/B/S /   / 32 26   13 LYDS5(6)(7)XX/13/ZY
    /   / 40 30   20 LYDS5(6)(7)XX/20/ZY
    /   / 55 40   30 LYDS5(6)(7)XX/25/ZY
    /   / / /   45 LYDS5(6)(7)XX/40/ZY
    /   / / /   50 LYDS5(6)(7)XX/50/ZY

    According to AS60947.3. Utilization category DC-PV2.

    Layers   Voltage/current(DC-PV2)
    2/3/4/6/8/10 600Vdc   800Vdc 1000Vdc 1200Vdc   1500Vdc Model
    13   13 6 4   3 LYDS5(6)(7)XX/13/ZY
    20   15 8 6   4 LYDS5(6)(7)XX/20/ZY
    25   23 10 8   5 LYDS5(6)(7)XX/25/ZY
    40   30 20 15   8 LYDS5(6)(7)XX/40/ZY
    50   40 25 18   10 LYDS5(6)(7)XX/50/ZY
    4T/B/S/3T/6T/9T /   / 12 /   / LYDS5(6)(7)XX/13/ZY
    /   / 18 /   / LYDS5(6)(7)XX/20/ZY
    /   / 20 /   / LYDS5(6)(7)XX/25/ZY
    /   / 40 /   / LYDS5(6)(7)XX/40/ZY
    /   / 50 /   / LYDS5(6)(7)XX/50/ZY

    According to UL508I. Utilization category UL.

    Layers   Voltage/current(UL 508i)
    2/3/4/6/8/10   600VDC    800VDC 1000VDC   Model
      30    30 13   LYDS5(6)(7)XX/13/ZY
      30    30 20   LYDS5(6)(7)XX/20/ZY
      30    30 25   LYDS5(6)(7)XX/25/ZY
      30    30 30   LYDS5(6)(7)XX/30/ZY

    Note* 10P products needs to be customized, please kindly contact us if need them

    • Non-polarity DC Isolator Switch

    • Modular design, optional 2-10 levels

    • Positive contact or reverse contact optional

    • Single Hole Mounting, Panel Mounting, Distribution Board, Door Clutch or Enclosure optional

    • Dynamic sealing design and world class sealing materials guarantee an IP66 protection rate.

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    🔹 FAQ – LYDS5/6/7 DC Isolator Switch

    1. What does the LYDS5/6/7 series cover?
      Multiple variants of DC isolator switches for different current and pole configurations.

    2. Can this series be used in solar PV applications?
      Yes — ideal for DC string isolation and PV array manual disconnection.

    3. Is arc control handled effectively?
      Yes — positive break design and DC-rated contacts minimize arcing risk.

    4. Which standards does it follow?
      Designed to meet IEC 60947-3 DC isolator switch requirements.

    5. Is OEM customization possible?
      Yes — factory supports branding, packaging, and specification customization.

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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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