How to distinguish diode and stabilized voltage canal

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Diode of Yi Na of diode of stabilized voltage of methodological half conductor (ZenerDiode) or voltage is adjusted 2 extremely, abbreviation stabilized voltage is in charge of. Stabilized voltage canal and semiconductor diode have one-way and electric quality, rely on to watch an external form merely, try very hard to distinguish sometimes. For example, the appearance of 2CW7 very elephantine small-power diode, and the appearance of 2DW7 as similar as transistor. But stabilized voltage canal and diode also have important distinction. The first, diode is being made to voltage servent commonly, stabilized voltage canal is below retrorse puncture condition the job, both usage is different; The 2nd, the retrorse puncture voltage of common diode is in commonly 40V above, tall can amount to hundreds of bend over consummate kilovolt, and in volt-ampere character curve a paragraph of retrorse puncture not steep, namely the range of retrorse puncture voltage is bigger, dynamic resistance is greater also. To stabilized voltage canal, exceed Vz of its job voltage when retrorse voltage (also call Qi Na voltage or stabilize voltage) when, retrorse electric current will increase suddenly, and the voltage of two end carries parts of an apparatus or appliance basically constant. Curve of corresponding retrorse volt-ampere character is very steep, dynamic resistance is very little. Stabilized voltage canal can use as manostat, voltage is fiducial, press converter of protection, n to wait too. This book states with Dz symbol stabilized voltage is in charge of. Low pressure of cent of stabilized voltage canal, high pressure two kinds. The Vz value that low-pressure stabilized voltage provides is commonly under 40V, canal of high-pressured stabilized voltage is highest can amount to 200V. Canal of homebred in the past stabilized voltage all uses metallic carapace to enclose, not only volume is large, and the price is high. Come in recent years whole set Bo seals up for keeping stabilized voltage canal comes out in great quantities, its advantage is norms all ready (Vz=2.

4 ～ 200V) , stabilized voltage is characteristic good, bulk is cabinet (use DO-35 to enclose, φ tubal way 2.

0mm, long 4mm) , the price is low. The classification of product of diode of homebred stabilized voltage sees a table 1. According to both retrorse puncture voltage reachs stability in the difference on numerical value, the stabilized voltage canal with OK and divisional not fair number and common diode, circuit sees a picture 1. Use million Europe watch to offer appropriate retrorse puncture voltage, will be measured to provide retrorse breakdown. The 10VDC archives that chooses avometer or 50VDV archives measure a value of retrorse puncture voltage, numerical value is in of 40V above is diode, under the stabilized voltage canal of 40V. Attention, this also has exceptional case. For example the retrorse puncture voltage of 2AP21 under 15V, the retrorse puncture tension of 2AP8 is the least the value is 20V. In addition, the Vz value that 2DW130 ～ 2DW143 stabilized voltage provides is 50 ～ 200V, the Vz value of 2CW362 ～ 2CW378 is 43 ～ 200V (above all is nominal value) . Encounter this kind of circumstance to distinguish not hard also. Shake by rated rotate speed million Europe is expressed likewise, because diode is retrorse the dynamic resistance of puncture area is greater, the curve is not steep, because of this volmeter finger swing range is bigger. And the Rz that stabilized voltage is in charge of is very small, the curve is very small, the curve is very steep, watch needle swings very small. Example: Measure model 2AP5 germanium diode, when shaking by rated rotate speed million Europe is expressed, retrorse puncture voltage changes between 110 ～ 130V, watch needle sways flabby (110V of ≥ of V(BR) of retrorse puncture voltage sets in manual) . Needle of the watch when measuring a 2CW136 stabilized voltage additionally to be in charge of is stabilized basically, point to in 115V position (the working voltage limits that 2DW136 gives out only in manual is 100 ～ 120V, but clam body is in charge of to some stabilized voltage, its job voltage is worth basically to decide) . Method the 2 resistor file that use avometer are OK also and divisional stabilized voltage canal and semiconductor diode. Specific means is, measure with archives of R × 1k above all, retrorse resistor, decide the canal that be measured, negative pole. Dial avometer next at archives of R × 10k, if plan institute is shown, black list pen receives negative pole, red watch pen receives positive electrode, by 15V of the 9 ～ inside the watch the batteries that fold a layer offers retrorse voltage. Among them, resistor reading is lesser is stabilized voltage canal, resistor is the diode of infinity. Note: (1) this method can measure the stabilized voltage of depress of report of batteries of archives of 10k of × of R of the retrorse pressure ratio that attack report to be in charge of only. CNC Milling CNC Machining