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    Zinc oxide varistor 18D series
      Zinc oxide varistor 18D series
      Zinc oxide varistor 18D series
      Zinc oxide varistor 18D series Zinc oxide varistor 18D series Zinc oxide varistor 18D series Zinc oxide varistor 18D series Zinc oxide varistor 18D series

      Varistor, Surge Protector 18D series Specification Description: Standard Series Varistor chip diameter: 18mm High Joule Series Varistor chip diameter: 18mm Electrical specifications: 1. Pres……

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  • Functional characteristics
  • Varistor, Surge Protector 18D series Specification Description:

    Standard Series

    Varistor chip diameter: 18mm

    High Joule Series

    Varistor chip diameter: 18mm

    Electrical specifications:

    1. Pressure-sensitive voltage: 18~1100V

    2. Maximum allowable voltage: 10~680V(AC) 14~895V(DC)

    3. Flow capacity (for reference)@1KHz: 290-23000pf

    Varistor 18D Series product introduction and the role of surge protector:

    Varistor is a kind of metal oxide semiconductor nonlinear ceramic resistance element with zinc oxide as the main component. According to its voltammetry characteristics, it can be divided into two types: symmetric (non-polar) and asymmetric (polar). Resistance is more sensitive to voltage,

    When the voltage reaches a certain value, the resistance quickly switches on. Because the varistor has good non-line characteristics. Large flow, fast action and no continuous flow, etc., are widely used as surge protectors, lightning surge protectors and electronics

    Voltage equipment lightning protection to prevent such overvoltages from interfering with the normal operation of electronic voltage equipment or damaging various circuit components.

    Varistor Application :

    Products as surge protectors are widely used in various fields of electronic engineering:

    1. Communication,

    2. Electricity,

    3. Home appliances,

    Specific such as: telephone, switch, electricity meter, distribution cabinet, socket box, distribution box, power switch, power surge protection box, power voltage regulator, lightning arrester (SPD surge protection special) and so on.

    Varistor, Surge protector Principle:

    When at rest, varistors have a high impedance (several megohm) relative to the protected electronic components and do not change the circuit characteristics of the original design

    When a transient surge voltage occurs (exceeding the breakdown voltage of the varistor), the impedance of the varistor becomes low (only a few ohms) and causes a short circuit of the original line.

    In other words, the electronic product or component is also protected.

    Pressure Resistor, advantage of surge protector:

    1. Wide voltage range

    2. Large flow capacity, large energy tolerance

    3. Large nonlinear coefficient

    4. Small leakage current

    5. Symmetrical volt-ampere characteristics

    6. Residual depression

    7. Fast action, small response time

    8. No continuous flow

    9. Good voltage ratio

    10. Strong surge absorption capacity

    11. High efficiency surge current processing capability

    12. Stable execution ability of suppressed voltage characteristics

    13. Excellent material

    14. Work reliably

    15. Long life

    16. Widely used

    Varistor, Surge protector Naming rules:

     Figure 1- Varistor, Surge protector naming rules - Chinese.jpg

    Varistor Packing specification:

    Item Part No. Bulk Reel Ammo
    Bag Box Carton Box Carton Box Carton
    1 18D 180L-471K 250 500 3000 400 2800 400 3000
    2 511K-112K 150 300 2000 300 2500 400 2800

    Varistor, Surge Protector 18D series part of the product model list :

     

    Standard series
    Diameter: 18mm
    Sequence Product Model Maximum allowable voltage Maximum suppression voltage Voltage sensitive Energy 10/1000µS Surge current tolerance 8/20µS Rated power
    ACrms(V) DC(V) VC IP at 1mA (J) (A) (W)
    (V) (A) (V)
    1 18D112K 680 895 1815 75 1100(990-1210) 252.0 6500 0.80
    2 18D102K 625 825 1650 1000(900-1100) 252.0
    3 18D911K 550 745 1500 910(819-1001) 252.0
    4 18D821K 510 670 1355 820(738-902) 238.0
    5 18D781K 485 640 1290 780(702-858) 238.0
    6 18D751K 460 615 1240 750(675-825) 238.0
    7 18D681K 420 560 1120 680(612-748) 203.0
    8 18D621K 385 505 1025 620(558-682) 203.0
    9 18D561K 350 460 920 560(504-616) 203.0
    10 18D511K 320 415 845 510(459-561) 182.0
    11 18D471K 300 385 775 470(423-517) 182.0
    12 18D431K 275 350 710 430(387-473) 175.0
    13 18D391K 250 320 650 390(351-429) 161.0
    14 18D361K 230 300 595 360(324-396) 152.0
    15 18D331K 210 275 550 330(297-363) 128.0
    16 18D301K 190 250 505 300(270-330) 122.0
    17 18D271K 175 225 455 270(243-297) 113.0
    18 18D241K 150 200 395 240(216-264) 100.0
    19 18D221K 140 180 360 220(198-242) 95.0
    20 18D201K 130 170 330 200(185-225) 91.0
    21 18D181K 115 150 300 180(162-198) 70.0
    22 18D151K 95 125 250 150(135-165) 60.0
    23 18D121K 75 100 200 120(108-132) 48.0
    24 18D101K 60 85 165 100(90-110) 41.0
    25 18D820K 50 65 135 82(74-90) 33.5
    26 18D680K 40 56 135 15 68(61-75) 27.0 1500 0.15
    27 18D560K 35 45 110 65(50-62) 23.0
    28 18D470K 30 38 93 47(42-52) 19.2
    29 18D390K 25 31 77 39(35-43) 14.4
    30 18D330K 20 26 65 33(30-36) 13.2
    31 18D270K 17 22 53 27(24-30) 10.8
    32 18D220K 14 18 43 22(20-24) 9.0
    33 18D180L 10 14 38 18(15-21) 7.2
    High Joule series
    Diameter: 18mm
    Sequence Product Model Maximum allowable voltage Maximum suppression voltage Voltage sensitive Energy 10/1000µS Surge current tolerance 8/20µS Rated power
    ACrms(V) DC(V) VC IP at 1mA (J) (A) (W)
    (V) (A) (V)
    1 18D112K 680 895 1815 75 1100(990-1210) 495.0 8000 0.80
    2 18D102K 625 825 1650 1000(900-1100) 445.0
    3 18D911K 550 745 1500 910(819-1001) 405.0
    4 18D821K 510 670 1355 820(738-902) 375.0
    5 18D781K 485 640 1290 780(702-858) 350.0
    6 18D751K 460 615 1240 750(675-825) 335.0
    7 18D681K 420 560 1120 680(612-748) 320.0
    8 18D621K 385 505 1025 620(558-682) 310.0
    9 18D561K 350 460 920 560(504-616) 310.0
    10 18D511K 320 415 845 510(459-561) 300.0
    11 18D471K 300 385 775 470(423-517) 280.0
    12 18D431K 275 350 710 430(387-473) 248.0
    13 18D391K 250 320 650 390(351-429) 224.0
    14 18D361K 230 300 595 360(324-396) 208.0
    15 18D331K 210 275 550 330(297-363) 185.0
    16 18D301K 190 250 505 300(270-330) 173.0
    17 18D271K 175 225 455 270(243-297) 158.0
    18 18D241K 150 200 395 240(216-264) 134.0
    19 18D221K 140 180 360 220(198-242) 125.0
    20 18D201K 130 170 330 200(185-225) 102.0
    21 18D181K 115 150 300 180(162-198) 96.0
    22 18D151K 95 125 250 150(135-165) 85.0
    23 18D121K 75 100 200 120(108-132) 64.0
    24 18D101K 60 85 165 100(90-110) 53.0
    25 18D820K 50 65 135 82(74-90) 43.0
    26 18D680K 40 56 135 15 68(61-75) 41.0 2500 0.15
    27 18D560K 35 45 110 65(50-62) 32.0
    28 18D470K 30 38 93 47(42-52) 27.0
    29 18D390K 25 31 77 39(35-43) 21.0
    30 18D330K 20 26 65 33(30-36) 19.0
    31 18D270K 17 22 53 27(24-30) 16.0
    32 18D220K 14 18 43 22(20-24) 13.0
    33 18D180L 10 14 38 18(15-21) 11.0

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