Overview
| brand | EPCOS/Epkos | model | S20K11 |
| Packaging/Specifications | Plugins | Maximum working voltage (AC) | eleven |
| Maximum working voltage | Voltage sensitive | ||
| clamping voltage | thirty-six | Peak surge current | 2 kA |
| energy | 0.023 uF | direct capacitance | 0.023 uF |
| Static power | packing | box-packed | |
| Certification Authority | Minimum packaging quantity | two hundred and fifty | |
| type | resistor | ||
Product Details
Varistor model |
S20K11 |
Ordering Code |
B72220S0110K101 |
working voltage (VAC) |
eleven |
Impulse current（security） |
two thousand |
energy absorption(J) |
ten |
function/series |
StanderD |
Typical capacitance（PF） |
twenty-three thousand |
application |
industry consumer data processing |
A varistor is actually a sensitive element with nonlinear volt ampere characteristics. Under normal voltage conditions, it is equivalent to a small capacitor. When an overvoltage occurs in a circuit, its internal resistance drops sharply and quickly conducts, increasing its working current by several orders of magnitude, effectively protecting other components in the circuit from overvoltage and damage. Its volt ampere characteristics are symmetrical, and this type of component is made using ceramic technology, Its internal microstructure. The microstructure includes zinc oxide grains and grain boundary layers around the grains. The resistivity of zinc oxide grains is very low, while the resistivity of grain boundary layers is high. A potential barrier equivalent to a Zener diode is formed between the two grains in contact, which is a varistor unit. The breakdown voltage of each unit is approximately3.5VIf many of these units are connected in series and parallel, they form the substrate of the varistor. The more units connected in series, the breakdown voltage increases, and the larger the cross-sectional area of the substrate, the greater its current capacity. When a varistor is working, each varistor unit is subjected to surge energy, rather than just the junction area being subjected to electrical power like a Zener diode. This is why a varistor can withstand much more electrical energy than a Zener diode.
Gas discharge tubes cannot work directly in the power networkDue to the extremely low internal resistance of these networks,May generate current that exceeds the allowable range of continuous current,And through the discharge tubeSo that the discharge tube won't go out,And generate extremely high temperaturesThe discharge tube is connected in series with a varistor to effectively limit the continuous currentEpkosSIOVThe series of metal oxide varistors provide high reliability for this applicationTo prevent discharge tube response during normal operation,Line voltage can be+10%tolerance,Discharge tubes can have-20%Tolerance of