CONOX® Metal Oxide Varistors

Technical Data - Series 7M

Dimensions

Dimensions for Series 7M 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 25 VB 8.5 11 3.5 5 2.5 0.6
from 55 VB     4   3  
from 200 VB     5   3.5  
from 300 VB   11.5 6.5   4.5  
from 420 VB 9 12 7   5.5  

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)
35VB 40 56 3 1200 0.08 10 2.5 125 61 75 890 0.02
40 50 65 5.5 1200 0.15 50 13 130 73 90 530 0.25
55 60 85 7.2   0.19     155 90 110 420  
65 75 100 8.6   0.22     190 108 132 370  
80 95 125 9.8   0.28     240 135 165 320  
90 110 140 11.3   0.33     290 162 198 290  
110 140 180 14.9   0.41     345 198 242 260  
130 150 200 16.0   0.44     370 216 264 230  
140 175 225 17.9   0.50     415 243 297 210  
170 205 270 20.7   0.61     500 297 363 170  
200 230 300 22.7   0.72     585 351 429 140  
220 250 325 26.5   0.78     625 378 462 130  
240 265 345 29.2   0.83     690 405 495 120  
250 280 364 30.2   0.87     715 423 517 110  
300 330 429 33.3   1.00     845 504 616 100  
340 380 494 39.8   1.20     965 576 704 90  
380 420 546 42.6   1.30     1040 639 781 85  
420 460 598 46.5   1.40     1130 702 861 80  
440 490 637 49.9   1.50     1210 738 902 75  
540 600 780 60.1   1.80     1460 900 1100 65  

 

U / I Characteristic: Series 7M

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.