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I think there is no difference between PNPN diode and NPNP because if u look at the basic structure of this diode from anode side it is a PNPN diode and if u look at it from the cathode side it is a NPNP diode.......actually it is a four layer silicon device with two terminals...it consists of 3 junctions..it acts as a switch during forward bias condition.....
i hope it's the correct one....if I am wrong please post the correct answer so that i can correct myself.....
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∙ 11y ago
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Scr is unidirectional 4 layers pnpn or npnp semiconducter switchign device?
pnpn
Why is an SCR always PNPN layers and not NPNP layers?
It can be ;) just flip the paper
Can you use resistance in place of diode in clipping circuits?
no we not use resistance in place of diode.
Why diode is prefer?
the most important character of diode is ,it allows only uni directional flow.. we can prefer diode in place of our commonly using electronic switches.
How do you test an hv03-12 high voltage diode?
place the multimeter on the diode. then connect the plobs to the hv diode. it can only conduct in one direction, not both ways. good luck
What is the difference between a transistor and scr?
SCR or Silicon Controlled Rectifiers are Bipolar junctions Transistor ( Thyristor Family), SCRs are made of two transistors thats why they PNPN or NPNP devices. The three important parts of transistor are - Emitter, Collector & Base. & the Three Important parts of SCR are - Anode, Cathode & Gate. Use of SCRs- rectification of high power AC & power control applications, such as lamp dimming, regulators and motor control. Use of Transistors - switch, audio, high voltage, amplifiers, switcher
Can a fuse take the place of a diode temporarily?
No - a fuse is designed as a safety device - to operate within a specific range. It performs a completely different function to a diode.
How is zener diode different from a conventional diode or ideal diode?
zener diode :zener diode operates under reverse bias voltageideal diode :ideal diode operates under forward bias voltage
Can a diode be used as rectifier diode?
yes, diode can be used as rectifier diode to convert ac to dc
Alternator diode location?
Inside the alternator, some are easily replaced and some are soldered in place.
If you were to swap the polarities of a diode would this circuit still operate Elaborate on your answer.?
It isn't clear what circuit you are talking about - and not even what sort of diode you are talking about. But in general, a diode might NOT work the same if you swap the polarity. For instance, a common diode is the rectifier diode; this one lets current through in one direction, but not in the other.Some diodes may even burn out if you connect them with the wrong polarity (and don't have adequate protection in place).
What is impatt diode?
The read type diode are called impatt diode
