Good quality(Japanese HITACHI protective technology) Reasonable price; Model variety.

Zinc oxide Varistor electric performance
1	Type designation	Unit	D30	D35	D38	D42	D49	D52
2	Dimension
2.1	-Diameter	±0.3mm	30.0	35.0	38.0	42.0	49.0	52.0
2.2	-Thickness	±0.5mm	24.5	24.5	24.5	24.5	24.5	24.5
3	Reference voltage at U1 mA D.C.  (Uref)	±0.3kV	5.3	5.3	5.3	5.3	5.3	5.3
4	Residual voltage at
4.1	-lightning impule 8/20μs,5kA  (Max.)	±0.5kV	9.5	9.3	9.1	9.0	8.8	8.7
4.2	-lightning impule 8/20μs,10kA (Max.)	±0.5kV	/	/	10.0	9.8	9.6	9.5
5	voltage ratio of a non-linear Varistor
5.1	-U5kA/U1mA  (Max.)		1.80	1.75	1.72	1.70	1.67	1.65
5.2	-U10kA/U1mA  (Max. )		/	/	1.88	1.85	1.82	1.79
6	non-linear coefficient (a value, 10uA~1mA) (Min.)		24	22	21	20	19	18
7	Long duration current impulse withstand
7.1	-2ms rectangular current withstand (≥18 times)	A	120	150	200	250	400	450
8	Operating duty
8.1	-4/10μs high current impulse withstand (≥2 times)	kA	55	65	80	100	100	100
9	accelerated ageing test (115 1000h)
9.1	-applied voltage ratio (Max.)		85%	85%	85%	85%	85%	85%
9.2	-Kct		≤1.2
10	Package data
10.1	Net weight of each unit	g	100	130	153	190	263	290
10.2	Each carton package quantity	pcs	165	165	132	132	90	90
10.3	Dimensions	cm	30.8x15.3x23		30.8x17.8x22		32x21.5x22.5

Metal oxide Varistor (Diameter: 30mm~85mm)