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Metal Oxide Varistors

Metal Oxide Varistor
Specifications:

Response Time

<50ns

Voltage Coefficient

-0.05%/C

Insulation Resistance≥1000MΩ @500V
Insulation Voltage1000Vrms (Varistor Rating ≤330V

1500Vrms (Varistor Rating ≥330V

Operating Temperature Range

-40C to 85C

 

 

These devices are designed to protect equipment against transient voltage spikes. Connected directly across the supply rails, they offer a simple solution to transient suppression. A varistor remains high impedance during normal use, when a spike is encountered the impedance drops to a very low level, clamping the transient voltage to an acceptable level. The varistor absorbs the unwanted energy thereby protecting the equipment.

Operating

Voltage

Vrms

Vdc

Varistor Voltage

Nominal

Min/Max

Max Clamp Voltage

Current

Surge Current

1 Surge

2 Surge

Power

W

Energy j

10/1000s

Dia

mm

11141816/20362.5A2501250.020.97.0
14182220/24432.5A2501250.021.17.0
17222724/30532.5A2501250.021.47.0
20263330/36652.5A2501250.021.77.0
30384742/52932.5A2501250.022.57.0
50658274/901351012006000.255.57.0
608510090/1101651012006000.256.57.0
75100120108/1322001012006000.257.87.0
130170200185/2253401012006000.25137.0
130170200185/22534050450025000.65714.0
150200240216/2643951012006000.25157.0
150200240216/26439525250012500.43510.0
150200240216/26439510065004000110820.0
175225270247/3034551012006000.25187.0
250320390351/4296501012006000.25257.0
250320390351/42965025250012500.46010.0
250320390351/42965050450025000.610014.0
275350430387/4737101012006000.25287.0
275350430387/47371025250012500.46510.0
275350430387/47371050450025000.611514.0
275350430387/47371010065004000119020.0
300385470423/5177751012006000.25307.0

Order Code 125+50+100+
741-180Operating Voltage 11V @2.5A0.220.18350.14680.1174
741-220Operating Voltage 14V @2.5A0.130.11240.09630.0642
741-270Operating Voltage 17V @2.5A0.130.11240.09630.0642
741-330Operating Voltage 20V @2.5A0.130.11240.09630.0642
741-470Operating Voltage 30V @2.5A0.130.11240.09630.0642
741-820Operating Voltage 50V @10A0.080.07350.0630.042
741-101Operating Voltage 60V @10A0.100.0840.0720.048
741-121Operating Voltage 75V @10A0.080.07350.0630.042
741-201Operating Voltage 130V @10A0.080.07350.0630.042
743-201Operating Voltage 130V @50A0.200.17290.14820.0988
741-241Operating Voltage 150V @10A0.080.7140.06120.0408
742-241Operating Voltage 150V @25A0.120.10820.09270.0618
744-241Operating Voltage 150V @100A0.430.38050.32610.2174
741-271Operating Voltage 175V @10A0.080.07140.06120.0408
741-391Operating Voltage 250V @10A0.080.06790.05820.0388
742-391Operating Voltage 250V @25A0.130.11240.09630.0642
743-391Operating Voltage 250V @50A0.110.0930.07440.0595
741-431Operating Voltage 275V @10A0.090.07560.06480.0432
742-431Operating Voltage 275V @25A0.140.1190.1020.068
743-431Operating Voltage 275V @50A0.200.15840.11880.0792
744-431Operating Voltage 275V @100A0.500.43440.3720.248
741-471Operating Voltage 300V @10A0.090.08160.06990.0466

 

 

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Fax: 0191 252 2296

 
 

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