Surge Suppression

PPM can provide MOVs for high power and high voltage AC & DC applications, these devices will extended the lifetime of the critical components.

A Varistor (or voltage-dependant resistor) is a component that varies its electrical resistance as the applied voltage changes. At low voltage they have a high electrical resistance and at high voltage a low electrical resistance. In a system they are ideal for diverting surge voltages and spikes away from critical components.

Metal Oxide Varistors (MOVs) are made from zinc oxide and other metal oxides placed between two metal plates or contacts. The functions and applications of these components are similar to standard varistors.

Browse the tables below to find a suitable product or call us on +44 (0)1793 784389 to discuss your requirement.

Metal Oxide Varistors

	Maximum Continuous Operating Voltage	Varistor Voltage	Energy Rating	Maximum Current	Maximum Clamping Voltage
Surface Mount MOVs	8 - 300 VAC (11 - 385 VDC)	15 - 470 V	0.4 - 25 J	0.2 - 1.2 kA	28 - 775 V
Radial Lead MOVs	11 - 1000 VAC (14 - 1465 VDC)	18 - 1800 V	0.6 - 725 J	0.1 - 20 kA	40 - 2970 V
Tab Lead MOVs	130 - 1000 VAC (170 - 1350 VDC)	205 - 4230 V	100 - 3500 J	10 - 70 kA	325 - 2800 V
Case MOVs	130 - 2800 VAC (170 - 3500 VDC)	205 - 4700 V	210 - 7000 J	25 - 100 kA	340 - 7400 V
Encapsulated MOVs	130 - 660 VAC (175 - 850 VDC)	200 - 1050 V	370 - 1250 J	40 kA	320 - 1740 V
High Energy Bare MOV Discs	130 - 1400 VAC (170 - 1750 VDC)	200 - 2200 V	310 - 7000 J	10 - 70 kA	340 - 3580 V

	Maximum Continuous Voltage	Surge Current	Voltage Protection Rating
Thermally Protected MOVs	150 - 690 VAC (200 - 910 VDC)	25 - 50 kA	600 - 2200 V

	Maximum Continuous Operating Voltage	Rated Voltage	DC Reference Voltage	Current Impulse Withstand Capacity	Maximum Residual Voltage Ratio
Surge Arrestors	480 - 6720 VDC	280 - 6000 V	600 - 9200 V	40 - 100 kA	1.69 - 1.88

	Maximum Continuous Operating Voltage	Maximum Continuous Power Rating	Maximum Discharge Capacity	Varistor Voltage Maximum
Silicon Carbide Suppressors	135 - 1350 VAC (6 - 1500 VDC)	1.5 - 40 W	275 - 90000 J	210 - 2160 V

	Maximum DC Voltage	Maximum Clamping Voltage	Peak Discharge Current
Selenium Surge Suppressor (Polarized)	90 - 675 VDC	240 - 1800 V	3 - 904 A

Series	System Voltage	Nominal Discharge Current	Surge Capacity per Phase	Maximum Continuous Operating Voltage
Dean HE1	120 - 480 V	10000 A	25000 - 50000 A	150 - 420 V
Dean HE2	120 - 600 V	10000 A	50000 A	150 - 690 V
Dean HE3	120 - 600 V	20000 A	100000 - 300000 A	150 - 690 V