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    metal oxide varistor 20D series
      metal oxide varistor 20D series
      metal oxide varistor 20D series metal oxide varistor 20D series metal oxide varistor 20D series metal oxide varistor 20D series metal oxide varistor 20D series

      varistor 20D series N(Standard) Series Varistor Element Diameter:20mm J(High Surge&High Energy) Series Varistor Element Diameter:20mm Specifications 1. Varistor voltage: 18~1800V 2. Max. allowab……

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  • Functional characteristics
  • varistor 20D series
    N(Standard) Series
    Varistor Element Diameter:20mm
    J(High Surge&High Energy) Series
    Varistor Element Diameter:20mm
    Specifications
    1. Varistor voltage: 18~1800V
    2. Max. allowable voltage: 10~1000V(AC) 14~1465V(DC)
    3. Capacitance(reference)@1KHz:320-28500pf

    Varistor product introduction:
    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.

    application of varistor:
    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.

    metal oxide varistor working 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.

    Advantages of varistors:
    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 Naming rules:
    metal oxide varistor marking code

    Varistor packing specifications:

    Item Part No. Bulk Reel Ammo
    Bag Box Carton Box Carton Box Carton
    1 20D 180L-471K 250 500 3000 400 2800 400 2800
    2 511K-182K 125 250 1500 300 2100 300 2100

    Varistor 20D series part of the product model summary table:
    N(Standard) Series
    Element Disc Diameter:20mm

    Item Part No. Max Allowable Voltage Max Clamping Voltage Varistor Voltage Energe 10/1000µS Withstanding Surge Current 8/20µS Rated Power
    ACrms(V) DC(V) at 100A at 1mA (J) 1 time 2 times (W)
    (V) (V) (A)
    1 20D182K 1000 1465 2970 1800(1620-1980) 560.0 6500 4000 1.0
    2 20D152K 900 1200 2475 1500(1350-1650) 420.0
    3 20D112K 680 895 1815 1100(990-1210) 280.0
    4 20D102K 625 825 1650 1000(900-1100) 280.0
    5 20D911K 550 745 1500 910(819-1001) 280.0
    6 20D821K 510 670 1355 820(738-902) 266.0
    7 20D781K 485 640 1290 780(702-858) 266.0
    8 20D751K 460 615 1240 750(675-825) 266.0
    9 20D681K 420 560 1120 680(612-748) 224.0
    10 20D621K 385 505 1025 620(558-682) 224.0
    11 20D561K 350 460 920 560(504-616) 210.0
    12 20D511K 320 415 845 510(459-561) 210.0
    13 20D471K 300 385 775 470(423-517) 210.0
    14 20D431K 275 350 710 430(387-473) 196.0
    15 20D391K 250 320 650 390(351-429) 182.0
    16 20D361K 230 300 595 360(324-396) 168.0
    17 20D331K 210 275 550 330(297-363) 140.0
    18 20D301K 190 250 505 300(270-330) 133.0
    19 20D271K 175 225 455 270(243-297) 126.0
    20 20D251K 160 205 415 250(225-275) 116.0
    21 20D241K 150 200 395 240(216-264) 112.0
    22 20D221K 140 180 360 220(198-242) 105.0
    23 20D201K 130 170 330 200(185-225) 98.0
    24 20D181K 115 150 300 180(162-198) 84.0
    25 20D151K 95 125 250 150(135-165) 70.0
    26 20D121K 75 100 200 120(108-132) 56.0
    27 20D101K 60 85 165 100(90-110) 42.0
    28 20D820K 50 65 135 82(74-90) 37.8
    29 20D680K 40 56 135 68(61-75) 23.8 2000 1000 0.2
    30 20D560K 35 45 110 65(50-62) 19.6
    31 20D470K 30 38 93 47(42-52) 16.8
    32 20D390K 25 31 77 39(35-43) 13.2
    33 20D330K 20 26 65 33(30-36) 11.2
    34 20D270K 17 22 53 27(24-30) 9.1
    35 20D220K 14 18 43 22(20-24) 7.4
    36 20D180L 10 14 38 18(15-21) 6.1

    J(High Surge&High Energy) Series
    Element Disc Diameter:20mm

    Item Part No. Max Allowable Voltage Max Clamping Voltage Varistor Voltage Energe 10/1000µS Withstanding Surge Current 8/20µS Rated Power
    ACrms(V) DC(V) at 100A at 1mA (J) 1 time 2 times (W)
    (V) (V) (A)
    1 20D182K 1000 1465 2970 1800(1620-1980) 860.0 10000 7000 1.0
    2 20D152K 900 1200 2475 1500(1350-1650) 780.0
    3 20D112K 680 895 1815 1100(990-1210) 620.0
    4 20D102K 625 825 1650 1000(900-1100) 560.0
    5 20D911K 550 745 1500 910(819-1001) 510.0
    6 20D821K 510 670 1355 820(738-902) 460.0
    7 20D781K 485 640 1290 780(702-858) 421.0
    8 20D751K 460 615 1240 750(675-825) 420.0
    9 20D681K 420 560 1120 680(612-748) 382.0
    10 20D621K 385 505 1025 620(558-682) 381.0
    11 20D561K 350 460 920 560(504-616) 380.0
    12 20D511K 320 415 845 510(459-561) 380.0
    13 20D471K 300 385 775 470(423-517) 350.0
    14 20D431K 275 350 710 430(387-473) 305.0
    15 20D391K 250 320 650 390(351-429) 275.0
    16 20D361K 230 300 595 360(324-396) 255.0
    17 20D331K 210 275 550 330(297-363) 228.0
    18 20D301K 190 250 505 300(270-330) 210.0
    19 20D271K 175 225 455 270(243-297) 190.0
    20 20D241K 150 200 395 240(216-264) 168.0
    21 20D221K 140 180 360 220(198-242) 155.0
    22 20D201K 130 170 330 200(185-225) 140.0
    23 20D181K 115 150 300 180(162-198) 130.0
    24 20D151K 95 125 250 150(135-165) 106.0
    25 20D121K 75 100 200 120(108-132) 85.0
    26 20D101K 60 85 165 100(90-110) 70.0
    27 20D820K 50 65 135 82(74-90) 56.0
    28 20D680K 40 56 135 68(61-75) 49.0 3000 1000 0.2
    29 20D560K 35 45 110 65(50-62) 41.0
    30 20D470K 30 38 93 47(42-52) 34.0
    31 20D390K 25 31 77 39(35-43) 28.0
    32 20D330K 20 26 65 33(30-36) 24.0
    33 20D270K 17 22 53 27(24-30) 19.0
    34 20D220K 14 18 43 22(20-24) 16.0
    35 20D180L 10 14 38 18(15-21) 13.0

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