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Metal Oxide Varistors

Metal oxide varistors consist of approximately 90% zinc oxide as a ceramic base material plus other filler materials for the formation of junctions between the zinc oxide grains. The Metal Oxide Varistor or MOV for short, is a voltage dependent resistor in which the resistance material is a metallic oxide, primarily zinc oxide (ZnO) pressed into a ceramic like material.

Metal oxide varistors has become the most common type of voltage clamping device today and are available for use at a wide range of voltages and currents. The use of a metallic oxide within their construction means that MOV’s are extremely effective in absorbing short term voltage transients and have higher energy handling capabilities.

The metal oxide varistor starts conduction at a specific voltage and stops conduction when the voltage falls below a threshold voltage. The difference between a standard silicon carbide (SiC) varistor and a MOV type varistor is that the leakage current through the MOV’s zinc oxide material is very small current at normal operating conditions and its speed of operation in clamping transients is much faster.

Features:

Data Sheet

NTE Type No.	Case Diameter	Maximum Ratings (TA = 25°C)				Characteristics
		Continuous		Transient
		RMS Voltage (Volts)	DC Voltage (Volts)	Energy (10/1000μs) (Joules)	Peak Current (8/20μs) (Amps)	Nominal Varistor Voltage @ 1mA DC Test Current (Volts)	Maximum Clamping Voltage, VC @ Test Current (8/20μs) (Volts)	Transient Power Dissipation (Watts)
		Vm (AC)	Vm (DC)	WTM	ITM	VNOM	VCL	PD
1V010	8.5mm	10	12	0.8	250	18	45	0.25
2V010	16mm	10	12	3.5	1000	18	45	0.60
1V014	8.5mm	14	18	1.2	250	22	55	0.25
2V014	16mm	14	18	4.0	1000	22	55	0.60
1V015	8.5mm	15	20	1.0	250	24	52	0.25
2V015	16mm	15	20	4.5	1000	24	48	0.60
1V017	8.5mm	17	22	1.3	250	27	60	0.25
2V017	16mm	17	22	5.0	1000	27	53	0.10
1V020	9mm Max	20	26	1.5	250	33	65	0.20
2V020	16mm	20	26	6.0	1000	33	70	0.60
1V025	8.5mm	25	31	1.7	250	39	80	0.25
2V025	16mm	25	31	7.0	1000	39	80	0.60
1V030	8.5mm	30	38	2.3	250	47	95	0.25
2V030	16mm	30	38	8.5	1000	47	95	0.60
1V035	8.5mm	35	45	2.7	250	56	110	0.25
2V035	16mm	35	45	10.0	1000	56	110	0.60
1V040	8.5mm	40	55	3.2	250	68	135	0.25
2V040	16mm	40	55	13.0	1000	68	135	0.60
1V050	8.5mm	50	66	4.0	250	82	150	0.25
2V050	16mm	50	66	14.0	1000	82	150	0.60
1V060	8.5mm	60	80	6.0	1200	100	175	0.25
2V060	16mm	60	80	18.0	4500	100	175	0.60
1V075	8.5mm	75	95	5.0	1200	120	205	0.25
2V075	16mm	75	95	21.0	4500	120	205	0.60
1V095	8.5mm	95	125	7.0	1200	150	250	0.25
2V095	16mm	95	125	29.0	4500	150	250	0.60
1V115	8.5mm	115	150	10.0	1200	171	295	0.25
2V115	16mm	115	150	35.0	4500	171	300	0.60
1V130	8.5mm	135	180	10.0	1200	216	355	0.25
2V130	16mm	135	180	39.0	4500	216	355	0.60
524V13	23mm	135	180	72.0	6500	216	355	1.00
1V150	8.5mm	135	210	10.0	1200	240	410	0.25
2V150	16mm	160	210	40.0	4500	240	410	0.60
524V15	23mm	160	210	80.0	6500	240	410	1.00
1V175	8.5mm	170	225	12.0	1200	270	450	0.25
524V17	23mm	170	225	90.0	6500	270	450	1.00
1V250	8.5mm	250	320	20.0	1200	390	630	0.25
2V250	16mm	250	320	70.0	4500	390	630	0.60
524V25	23mm	250	320	129.0	6500	390	630	1.00
1V275	8.5mm	275	330	20.0	1200	430	685	0.25
2V275	16mm	275	330	72.0	4500	430	685	0.60
524V27	23mm	275	330	135.0	6500	430	685	1.00
1V300	8.5mm	300	370	22.0	1200	470	740	0.25
2V300	16mm	300	370	79.0	4500	470	740	0.60
524V30	23mm	300	370	149.0	6500	470	740	1.00
2V420	16mm	420	560	90.0	4500	680	1110	0.60
524V42	23mm	420	560	160.0	6500	680	1110	1.00
2V480	16mm	480	640	105.0	4500	750	1240	0.60
524V48	23mm	480	640	180.0	6500	750	1240	1.00