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Low Capacitance Type

SEMITEC Voltage Regulating Diode (VRD) is a transient voltage suppressor device that is designed to absorb voltage surges and spikes that occur during power initiation. Our VRD features uniform avalanche breakdown across the junction, enabling very fast response to surge voltage.
Furthermore, its control voltage is almost independent from the current which makes it a highly reliable, high performance device.

Applications

- Protection of telecommunications line and equipment from lightning-induced surges
- ESD protection
- EMP protection
- Relays, solenoids, etc., switching surge protection
- Surge protection of fire alarms, smoke detectors, etc.
- Protection of electric circuits from abnormal voltage conditions

ZD Type

Specifications

Item	Symbol	Rating	Unit	Condition
Rated power	P	0.5	W
Allowable transient power	P_P	250	W	10/1000μs
		1000	W	1.2/50μs
		3000	W	8/20μs
Operating temperature range		-40〜125	℃
Storage temperature range	Tstg	-40〜130	℃
Rated voltage	Vs	Please see below.
Peak reverse voltage	V_PRV	200	V	10μs

(Ta=25℃)

Dimensions

Electrical Characteristics

Part No.	Item	Breakdown voltage	Rated voltage	Maximum Leakage current	Maximum clamping voltage & maximum peak pulse current				Temperature coefficient (TYP)	Capacitance (TYP)
	Symbol	V_B	Vs	I_Lmax	Vcmax／Ipp					C
	Condition	It＝1mA	D.C.	Vs	10/1000μs		8/20μs		25℃〜50℃
	Unit	V	V	μA	V	A	V	A	%/℃	pF
ZD015		15(12.8〜 17.2)	11.4	10	24.0	10.4	31.0	96.7	0.075	31.5
ZD018		18(15.3〜 20.7)	13.7	10	28.0	8.93	36.0	83.3	0.079	31.0
ZD022		22(18.7〜 25.3)	16.8	5	33.2	7.53	43.0	69.7	0.082	29.0
ZD027		27(23.0〜 31.0)	20.6		40.0	6.25	52.0	57.7	0.085	28.2
ZD033		33(28.1〜 37.9)	25.2		48.6	5.14	63.0	47.6	0.087	27.2
ZD039		39(33.2〜 44.8)	29.8		57.4	4.35	74.0	40.5	0.090	26.3
ZD047		47(40.0〜 54.0)	35.9		68.5	3.65	89.0	33.7	0.092	25.0
ZD056		56(47.6〜 64.4)	42.8		81.0	3.08	106	28.6	0.094	24.1
ZD068		68(57.8〜 78.2)	52.0		98.0	2.55	127	23.8	0.096	22.0

(Ta=25℃)

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