Metal Oxide Varustors |
Cedicom Electronics manufactures a wide range of METAL OXIDE VARISTORS (MOV'S) for Surge Protection Application. The AC power line environment contains electrical high voltage transients/surges due to lighting, line to ground faults, short circuits fuse blow, switching on and off heavy electrical machinery and many more causes. These voltage surges could be high as 6KV and can last for a few micro seconds to milliseconds, further more, the frequency of these surges often could be at least four times a day. These transients, inspite of their normally short duration, are extremely damaging to the modern electronic equipments where in advanced IC's and other components are used and are very sensitive to such high voltage surges. Major failure in these sophisticated electronic systems are attributed to these transients. Besides failure in electronic systems these transients can also cause damage to electrical systems by damaging transformers, contractors and similar components by causing insulation break-down, spark over, etc.
To overcome the problems associated with the transients, often surge suppressor devices are used. Amongst the suppressor devices that are available "Metal Oxide Varistor' (MOV's) are the latest type of electronic devices used for surge suppression.
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METAL OXIDE VARISTOR
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The MOV's are voltage dependent, non-linear devices which are manufactured using semi conducting metal oxides and has a current (1), voltage (V) characteristics given by the following equation 1=KVn where K is a Parametric constant and 'n' in the non-linear factor.
The I-V characteristic, thus, is very similar to that of back-to-back zener diode (but zener diode has very
limited range of surge protection and energy handling capability). The advantages in using MOV's are:
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Can be used in AC or DC Lines |
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Large surge current withstand capability |
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Excellent voltage clamping properly |
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Very low leakage current |
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Fast response time |
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Symmetrical current voltage characteristics |
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Wide choice of operating voltage and Energy ranges |
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No follow on current |
| DIMENSION OF COMPONENT |
| Dia/code |
7 O |
10 O |
14 O |
20 O |
| Dia Max |
9 |
13 |
17 |
23 |
| D(lead dia) |
0.6 |
0.8 |
0.8 |
0.8 |
| F(±0.5)(pitch) |
5 |
7.5 |
7.5 |
10 |
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| MOV APPLICATIONS: |
The MOV's are extensively used for surge protection of various systems, some of which are given below: -
| ELECTRONICS |
D O MESTIC |
T E L E C O M M U N ICATION |
U TILITIES/FACILITIES |
Computers & Peripherals |
Refrigeration/ Heating
Equipments |
Telephones |
Power Distribution |
Microprocessor Based Systems |
Washing Machines |
Communication Equipments |
Railways |
Electrical Machine Tools |
Mixers/ Juicers |
EPABX |
Converters / Inverters |
Instrumentation |
Microwave Ovens |
Switchboard etc. |
Power supplies etc. |
Medical Electronics |
Tv's & Entertainment
Electronics |
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NC/ CMC Systems |
Fan Regulators |
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PLC etc. |
Air Conditioners etc. |
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And to protect any system or equipment where AC or DC power is used.
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| VARISTOR RATINGS & SPECIFICATIONS |
Varistor (MOV) Type
No. |
Maximum Rated
Voltage |
Varistor Voltage
@1mA |
Maximum Clamping VoltageV
Max
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Maximum Surge Current
(8/20us)
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Maximum Energy 10/1000US(Joule)
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Typical Capacitance at 1KHz
PF
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AC(V) rms |
DC(V) rms |
Range Min. - V
-Max. |
| CVR 11/07 |
11 |
14 |
16 - 18 - 20 |
38 |
250 |
1.2 |
3500 |
| CVR 14/07 |
14 |
18 |
20 - 22 - 24 |
43 |
250 |
1.4 |
2800 |
| CVR 14/10 |
CVR 14/10 |
18 |
20 - 22 - 24 |
43 |
500 |
2.7 |
6000 |
| CVR 14/14 |
14 |
18 |
20 - 22 - 24 |
43 |
1000 |
5.4 |
15000 |
| CVR 20/07 |
20 |
26 |
30 - 33 - 36 |
65 |
250 |
2.2 |
1800 |
| CVR 20/14 |
20 |
26 |
30 - 33 - 36 |
65 |
1000 |
8.8 |
8500 |
| CVR 25/07 |
25 |
31 |
35 - 39 - 43 |
77 |
250 |
2.4 |
1450 |
| CVR 25/10 |
25 |
31 |
35 - 39 - 43 |
77 |
500 |
4.7 |
3700 |
| CVR 25/14 |
25 |
31 |
35 - 39 - 43 |
77 |
1000 |
9.4 |
7500 |
| CVR 30/07 |
30 |
38 |
42 - 47 - 52 |
93 |
250 |
3.0 |
1150 |
| CVR 30/10 |
30 |
38 |
42 - 47 - 52 |
93 |
500 |
6.0 |
3300 |
| CVR 30/14 |
30 |
38 |
42 - 47 - 52 |
93 |
1000 |
12.0 |
6500 |
| CVR 40/10 |
40 |
56 |
61 - 68 - 75 |
135 |
500 |
8.5 |
2500 |
| CVR 40/14 |
40 |
56 |
61 - 68 - 75 |
135 |
1000 |
17.0 |
4700 |
| CVR 50/10 |
50 |
65 |
74 - 82 - 90 |
135 |
2500 |
11.0 |
2100 |
| CVR 50/14 |
50 |
65 |
74 - 82 - 90 |
135 |
4500 |
22.0 |
3900 |
| CVR 60/07 |
60 |
85 |
90 - 100 - 110 |
165 |
1200 |
7.0 |
860 |
| CVR 60/10 |
60 |
85 |
90 - 100 - 110 |
165 |
2500 |
14.0 |
1700 |
| CVR 60/14 |
60 |
85 |
90 - 100 - 110 |
165 |
4500 |
28.0 |
3400 |
| CVR 75/14 |
75 |
100 |
108 - 120 - 132 |
200 |
4500 |
32.0 |
3100 |
| CVR 95/07 |
95 |
125 |
135 - 150 - 165 |
250 |
1200 |
11.0 |
490 |
| CVR 95/10 |
95 |
125 |
135 - 150 - 165 |
250 |
2500 |
22.0 |
1300 |
| CVR 95/14 |
95 |
125 |
135 - 150 - 165 |
250 |
4500 |
44.0 |
3000 |
| CVR 110/14 |
110 |
153 |
162 - 180 - 198 |
300 |
2500 |
18.0 |
900 |
| CVR 130/07 |
130 |
170 |
185 - 200 - 225 |
340 |
1200 |
14.3 |
240 |
| CVR 130/10 |
130 |
170 |
185 - 200 - 225 |
340 |
2500 |
28.5 |
430 |
| CVR 130/14 |
130 |
170 |
185 - 200 - 225 |
340 |
4500 |
57.0 |
970 |
| CVR 150/07 |
150 |
200 |
216 - 240 - 264 |
395 |
1200 |
16.8 |
165 |
| CVR 150/10 |
150 |
200 |
216 - 240 - 264 |
395 |
2500 |
33.5 |
360 |
| CVR 150/14 |
150 |
200 |
216 - 240 - 264 |
395 |
4500 |
67.0 |
710 |
| CVR 150/20 |
150 |
200 |
216 - 240 - 264 |
395 |
6500 |
134.0 |
1500 |
| CVR 230/10 |
230 |
300 |
324 - 360 - 396 |
595 |
2500 |
52.0 |
260 |
| CVR 230/14 |
230 |
300 |
324 - 360 - 396 |
595 |
4500 |
104.0 |
500 |
| CVR 250/07 |
150 |
320 |
351 - 390 - 429 |
650 |
1200 |
30.0 |
105 |
| CVR 250/10 |
250 |
320 |
351 - 390 - 429 |
650 |
2500 |
60.0 |
240 |
| CVR 250/14 |
250 |
320 |
351 - 390 - 429 |
650 |
4500 |
120.0 |
480 |
| CVR 250/20 |
250 |
320 |
351 - 390 - 429 |
650 |
6500 |
240.0 |
1180 |
| CVR 275/07 |
275 |
350 |
387 - 430 - 473 |
710 |
1200 |
33.0 |
100 |
| CVR 275/10 |
275 |
350 |
387 - 430 - 473 |
710 |
2500 |
66.0 |
220 |
| CVR 275/14 |
275 |
350 |
387 - 430 - 473 |
710 |
4500 |
132.0 |
440 |
| CVR 275/20 |
275 |
350 |
387 - 430 - 473 |
710 |
6500 |
364.0 |
1100 |
| CVR 300/07 |
300 |
385 |
423 - 470 - 517 |
775 |
1200 |
35.0 |
90 |
| CVR 300/10 |
300 |
385 |
423 - 470 - 517 |
775 |
2500 |
70.0 |
190 |
| CVR 300/14 |
300 |
385 |
423 - 470 - 517 |
775 |
4500 |
140.0 |
420 |
| CVR 320/07 |
320 |
418 |
459 - 510 - 561 |
842 |
1200 |
37.0 |
80 |
| CVR 320/10 |
320 |
418 |
459 - 510 - 561 |
842 |
2500 |
74.0 |
180 |
| CVR 320/14 |
320 |
418 |
459 - 510 - 561 |
842 |
4500 |
148.0 |
390 |
| CVR 320/20 |
320 |
418 |
459 - 510 - 561 |
842 |
6500 |
296.0 |
1000 |
| CVR 385/10 |
385 |
505 |
558 - 620 - 682 |
1025 |
2500 |
82.0 |
160 |
| CVR 385/14 |
385 |
505 |
558 - 620 - 682 |
1025 |
4500 |
164.0 |
320 |
| CVR 385/20 |
385 |
505 |
558 - 620 - 682 |
1025 |
6500 |
328.0 |
950 |
| CVR 440/10 |
440 |
590 |
639 - 710 - 781 |
1140 |
2500 |
75.0 |
150 |
| CVR 440/14 |
440 |
590 |
639 - 710 - 781 |
1140 |
4500 |
100.0 |
340 |
| CVR 440/20 |
440 |
590 |
639 - 710 - 781 |
1140 |
6500 |
170.0 |
530 |
| CVR 510/10 |
510 |
670 |
738 - 820 - 902 |
1355 |
2500 |
94.0 |
130 |
| CVR 510/14 |
510 |
670 |
738 - 820 - 902 |
1355 |
4500 |
188.0 |
230 |
| CVR 510/20 |
510 |
670 |
738 - 820 - 902 |
1355 |
6500 |
376.0 |
700 |
| CVR 575/14 |
575 |
730 |
805 - 910 - 1000 |
1500 |
4500 |
120.0 |
250 |
| CVR 575/20 |
575 |
730 |
805 - 910 - 1000 |
1500 |
6500 |
220.0 |
500 |
| CVR 660/14 |
660 |
850 |
945 - 1050 -1155 |
1820 |
4500 |
140.0 |
225 |
| CVR 660/20 |
660 |
850 |
945 - 1050 -1155 |
1820 |
6500 |
250.0 |
450 |
| CVR 680/20 |
680 |
895 |
990 - 1100 -1210 |
1895 |
6500 |
496.0 |
450 |
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Quality Policy |
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“We, at Cedicom Electronics, are committed to manufacture electronic components that meet the needs and specifications of our customers with a promise to deliver on time.
We will continually strive to
improve the effectiveness of processes and systems through training and team work”.
LEADING EDGE OF RESEARCH AND DEVELOPMENT.
We, at Cedicom have always been at the leading edge of research and development.
The research and development facility at Cedicom is one of the finest of its kind in India. Fully taking on the challenges of the ever changing consumer demands, the Research and Development wing focuses on the entire product development pathwayfrom product sourcing, to upgrading, to adapting to newer conditions. The depth and breadth of our scientific and technological expertise enables us to develop new and affordable products.
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