CONOX® Metal Oxide Varistors

Technical Data - Series 20M

Dimensions

Dimensions for Series 20M are shown in the table below.

The table includes dimensions for both 'Standard' and 'Inline' variants.

from VB-value Dmax
mm		 Hmax
mm		 Tmax
mm		 F ± 1
mm		 Smax
mm		 d
mm
from 90 VB 22 25 4.5 7.5 2.5 0.8
from 110 VB     5   2.5  
from 200 VB 22.5 26 6   3.5  
from 300 VB     7   4.5  
from 420 VB     7.5   5  
from 440 VB     8   6.5  

Operating Temperature Range

The following values for the operating voltage (same as power dissipation or energy absorption) are admissible in the temperature range from - 40 °C to + 85 °C.

For other ambient temperatures, the values for the maximum operating AC or DC voltage must be reduced as shown.

The graph illustrates the derating of the maximum operating voltage subject to the operating temperature in %.

Technical Data

The values in the table below are absolute limits.

The maximum protection level is related to the class current.

The class current is the peak value of current which is 1/10 of the maximum peak current for 100 pulses.

 

Operating Voltage
(V)		 1 x 8/20 µs 10000 x 8/20 µs Class
Current 		 Prot'n
Level		 Varistor Voltage (V) Capaci-
tance		 Power
Diss.
Veff Vrms Vdc Emax J Imax A Emax J Imax A (A) (V) Min. Max. (pF) (W)
90 110 140 64.5 6500 1.2 190 100 300 162 198 2450 1.0
110 140 180 79.3   1.5     365 198 242 2040  
130 150 200 86.0   1.6     395 216 264 1870  
140 175 225 96.6   1.8     450 243 297 1700  
170 205 270 116   2.2     540 297 363 1450  
200 230 300 136   2.6     630 351 429 1190  
220 250 325 146   2.8     680 378 462 1150  
240 265 345 162   3.0     750 405 495 1100  
250 280 364 163   3.2     780 423 517 1020  
300 330 429 193   3.8     920 504 616 940  
340 380 494 224   4.3     1060 576 704 800  
380 420 546 246   4.8     1170 639 781 730  
420 460 598 269   5.3     1270 702 861 680  
440 490 637 283   5.6     1350 738 902 650  
540 600 780 345   6.8     1630 900 1100 560  

 

U / I Characteristic: Series 20M

The characteristic curve is showing the maximum possible voltage at a specific current.

The typical voltage values lie below it.

 

 

Pulse Diagram

If the permissible surge current of another pulse length (at a  fixed number of pulses) cannot be found in the table, please refer to the diagrams.

The graph shows permissible surge current as a function of the number of surges and the pulse length.