Kingtronics Blog

What is Supercapacitor?

A supercapacitor (SC), also called an ultracapacitor, is a high-capacity capacitor with a capacitance value much higher than other capacitors, but with lower voltage limits, that bridges the gap between electrolytic capacitors and rechargeable batteries. It typically stores 10 to 100 times more energy per unit volume or mass than electrolytic capacitors, can accept and deliver charge much faster than batteries, and tolerates many more charge and discharge cycles than rechargeable batteries.

Supercapacitors are most effective to bridge power gaps lasting from a few seconds to a few minutes and can be recharged quickly. 

Kingtronics(Kt) offers high quality Radial, Snap-in, Screw Type and Coin Type Super Capacitors at incredibly aggressive prices.

Features:
Standard coin-type, Radial type, Snap-in type, Screw Type terminals
Small-sized, large capacity
High energy and high power
Low ESR
Pb-free and RoHS compliant

Applications:
RAM, Detonator, car recorder, smart meter
Vacuum switch, digital camera, motor drive, clock circuit
UPS, toy, program-controlled switch, etc.

Do you know what information is contained in type number of Kt Kingtronics Bridge Rectifiers? 
Usually the uppercase letters of Bridge Rectifier represents package style, the latter two or more figures stand for the rated voltage.

For example:
DB107: DB= Case Style; Current=1A; V_RRM (voltage) =1000V
MB8S: MBS= Case Style; Current=1A; V_RRM  (voltage) =800V
KBPC810: KBPC= Case Style; Current=8A; V_RRM  (voltage) =1000V

Kingtronics Bridge Rectifiers include: 
DB101-DB107, DB101S-DB107S, MB1S-MB10S, KBL4005-KBL410, KBU6005-KBU610, KBP2005-KBP210, GBU4005-GBU410, GBJ6005-GBJ610, KBPC25005-KBPC2510, KBPC25005W-KBPC2510W, KBPC35005-KBPC3510, KBPC35005W-KBPC3510W.

Usually the bridge rectifier named in three or four digits, the first or first two number represents the rated current, the latter two figures represent the rated voltage (digital * 100V)

KBL407 : KBL = package; IR (current) = 4A; VRRM (voltage) = 700V.
KBPC2510 : KBPC = package; IR (current) = 25A; VRRM (voltage) = 1000V.

The fundamental electrical properties of multilayer ceramic capacitors are as follows:

Polarity: Multilayer ceramic capacitors are not polar, and may be used with DC voltage applied in either direction.

Rated Voltage: This term refers to the maximum con tinuous DC working voltage permissible across the entire operating temperature range. Multilayer ceramic capacitors are not extremely sensitive to voltage, and brief applications of voltage above rated will not result in immediate failure. However, reliability will be reduced by exposure to sustained voltages above rated.

Like all other practical capacitors, multilayer ceramic capacitors also have resistance and inductance. A simplified schematic for the equivalent circuit is shown in Figure 1. Other significant electrical characteristics resulting from these additional properties are as follows：

Impedance: Since the parallel resistance (Rp) normally very high, the total impedance of the capacitor is ：

The variation of a capacitor’s impedance with frequency determines its effectiveness in many applications.

Tantalum capacitors are manufactured from a powder of pure tantalum metal pressed to form a slug around a tantalum wire and subsequently vacuum sintered at high temperature. The resulting slug, although of high mechanical strength and density, is also highly porous giving a large internal surface area. This forms the positive "plate" of the capacitor. A dielectric layer of tantalum pentoxide is anodized on the surface of the tantalum anode, the cathode is formed by layers of manganese dioxide. Electrical contact is established by the deposition of carbon onto the surface of the "slug". The cathode connection is then made by means of conductive contact to a lead frame. Packaging is carried out to meet individual specification and customer requirements.

The tantalum capacitors must be used in such a conditions that the sum of the working voltage and ripple voltage peak values does not exceed the rated voltage.