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. SEMITEC’S VRD series is fully compliant with RoHS DIRECTIVE2011/65/EU.

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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 PP 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 VPRV 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 VB Vs ILmax 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 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℃)