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2. Varistor - Wikipedia

   en.wikipedia.org/wiki/Varistor

   A varistor (a.k.a. voltage-dependent resistor (VDR)) is a surge protecting electronic component with an electrical resistance that varies with the applied voltage. [2] It has a nonlinear , non- ohmic current–voltage characteristic that is similar to that of a diode .

3. Varicap - Wikipedia

   en.wikipedia.org/wiki/Varicap

   Operation of a varicap. Holes are blue, electrons are red, depletion zone is white. The electrodes are at the top and bottom. Varactors are operated in a reverse-biased state, so no DC current flows through the device.

4. Electronic component - Wikipedia

   en.wikipedia.org/wiki/Electronic_component

   A datasheet for an electronic component is a technical document that provides detailed information about the component's specifications, characteristics, and performance.

5. Electronic symbol - Wikipedia

   en.wikipedia.org/wiki/Electronic_symbol

   Wire crossover symbols for circuit diagrams. The CAD symbol for insulated crossing wires is the same as the older, non-CAD symbol for non-insulated crossing wires. To avoid confusion, the wire "jump" (semi-circle) symbol for insulated wires in non-CAD schematics is recommended (as opposed to using the CAD-style symbol for no connection), so as to avoid confusion with the original, older style ...

6. Thyristor - Wikipedia

   en.wikipedia.org/wiki/Thyristor

   A thyristor (/ θ aɪ ˈ r ɪ s t ər /, from a combination of Greek language θύρα, meaning "door" or "valve", and transistor [1]) is a solid-state semiconductor device which can be thought of as being a highly robust and switchable diode, allowing the passage of current in one direction but not the other, often under control of a gate electrode, that is used in high power applications ...

7. Surge protector - Wikipedia

   en.wikipedia.org/wiki/Surge_protector

   Surge Protection Device (SPD) for installation in a low-voltage distribution board. A surge protector (or spike suppressor, surge suppressor, surge diverter, [1] surge protection device (SPD), transient voltage suppressor (TVS) or transient voltage surge suppressor (TVSS)) is an appliance or device intended to protect electrical devices in alternating current (AC) circuits from voltage spikes ...