There is a common intermediate configuration, when both electrodes are located on the same probe, but the return electrode is much larger than the active one. Since current density is higher in front of the smaller electrode, the heating and associated tissue effects take place only (or primarily) in front of the active electrode, and exact position of the return electrode on tissue is not critical. Sometimes such configuration is called sesqui polar, even though the origin of this term in Latin (sesqui) means a ratio of 1.5

Kingtronics ( ) sell 2-Electrode arresters and 3-Electrode arresters. Surge arresters are designed to protect electrical equipment from damaging effects of spikes and transients caused by lightning, utility switching, isolation arcing, electrical motor cycling, or any other sudden change in electrical power flow on incoming AC power lines.


7 Dec 2010

A common element in electronic devices is a three-terminal resistor with a continuously adjustable tapping point controlled by rotation of a shaft or a knob. These variable resistors are known as potentiometers when all three terminals are present, since they act as a continuously adjustable voltage divider. A common example is a volume control for a radio receiver.

Accurate, high-resolution panel-mounted potentiometers (or "pots") have resistance elements typically wirewound on a helical mandrel, although some include a conductive-plastic resistance coating over the wire to improve resolution. These typically offer ten turns of their shafts to cover their full range. They are usually set with dials that include a simple turns counter and a graduated dial. Electronic analog computers used them in quantity for setting coefficients, and delayed-sweep oscilloscopes of recent decades included one on their panels.

Quartz crystals use the piezoelectric effect to convert the incoming electrical impulses into mechanical vibrations. These vibrations are affected by the mechanical resonances of the crystal, and as the piezoelectric effect operates in both directions, the mechanical resonances affect the electrical stimuli, being reflected back into the electrical circuit.

Today, quartz crystal filters can be designed with pass bands ranging from frequencies in the kilohertz region up to many Megahertz - with the latest technology this can rise to 100 MHz and more. However for the best performance and lowest costs the passband of the filter is generally kept to below about 30 MHz or so.

Kingtronics produce and sell many different kinds of diodes, and at Kingtronics’ s blog we will tell you how to test a Diode:

You can use a multimeter or a simple tester (battery, resistor and LED) to check that a diode conducts in one direction but not the other. A lamp may be used to test a rectifier diode, but do NOT use a lamp to test a signal diode because the large current passed by the lamp will destroy the diode!

Using these way you can confirm if your Diode is working or not. Kingtronics diode include: M7, 1N4001S-1N4007S, 1N4001-1N4007, 1N5391-1N5399, RL201-RL207, 1N5400-1N5408, 6A05-6A10, FR101-FR107, 1N4933-1N4937, FR151-FR157, FR201-FR207, 1N5817-1N5819, 1N5820-1N5822, LL4148, BZV55C & ZMM55C, RS1M, SM4007 melf, UF4007.If you are interested in these diode, welcome to visit

A Tantalum Capacitors is comprised of a permeable tantalum center section surrounded by tantalum pentoxide ,A tantalum wire is inserted into the center section and then extends axially from the component .The tantalum pentoxide layer is coated with manganese dioxide graphite ,a silver conductive coating and (finally) solder. Since 1960,tantalum capacitors have improved due to advances and development of higher charge tantalum powders ,directly contributing to the design of smaller tantalum capacitors.

Kingtronics has manage TKT CKT and EKT series of tantalum capacitors, They are all widely used in many mass produced items of electronics equipment. Kingtronics ‘s Tantalum Capacitors are very popular in overseas market , For more informations please visit , the detailed PDF will give you a satisfied answer.

Quartz crystals have piezoelectric properties; they develop an electric potential upon the application of mechanical stress. An early use of this property of quartz crystals was in phonograph pickups. One of the most common piezoelectric uses of quartz today is as a crystal oscillator. The quartz clock is a familiar device using the mineral. The resonant frequency of a quartz crystal oscillator is changed by mechanically loading it, and this principle is used for very accurate measurements of very small mass changes in the quartz crystal microbalance and in thin-film thickness monitors.Our Kingtronics short for Kt (logo) crystals are widely used in the oversea market.

Kingtronics offers leaded quartz crystal HC49U, HC49S and SMD quartz crystal HC49SMD.

Quartz Crystals General Information

Quartz Crystals
Kingtronics P/N Quartz Crystal Size Frequency Range Datasheet
QKT-HC49U Leaded Quartz Crystal 11.05x4.65x13.46mm 1.8432MHz to 200.000MHz ↓ Download PDF
QKT-HC49S Leaded Quartz Crystal 11.05x4.65mx3.7mm 3.200MHz to 90.000 MHz ↓ Download PDF
QKT-HC49SMD SMD Quartz Crystal 11.35x4.7x3.8mm 3.200MHz to 90.000 MHz ↓ Download PDF

Variable resistors used as potentiometers have all three terminals connected. This arrangement is normally used to vary voltage, for example to set the switching point of a circuit with a sensor, or control the volume (loudness) in an amplifier circuit. If the terminals at the ends of the track are connected across the power supply then the wiper terminal will provide a voltage which can be varied from zero up to the maximum of the supply.

Kingtronics are potentiometers manufacturer since 1990. Trimming potentiometers are Kingtronics' first products. RKT-3006 is one of the Trimming potentiometers,It is used where very precise adjustments must be made.RKT-3006 has 3 terminal styles:3006W, 3006P, 3006Y. The screw must be turned many times (10+) to move the slider from one end of the track to the other, giving very fine control.

Tantalum electrolytic capacitors exploit the tendency of tantalum to form a protective oxide surface layer, using tantalum powder, pressed into a pellet shape, as one "plate" of the capacitor, the oxide as the dielectric, and an electrolytic solution or conductive solid as the other "plate". Because the dielectric layer can be very thin (thinner than the similar layer in, for instance, an aluminium electrolytic capacitor), a high capacitance can be achieved in a small volume. Because of the size and weight advantages, tantalum capacitors are attractive for portable telephones, personal computers, and automotive electronics.

Kingtronics short for Kt (logo) produce tantalum capacitors since 1997, include dipped tantalum capacitors (through hole capacitors), general purpose chip tantalum capacitors (surface mount) and Low-ESR chip tantalum capacitors (surface mount).We have a full instruction about Tantalum Capacitors in our website  each series of Tantalum Capacitors have detailed PDF and other information.

Rectifiers find a use in detection of amplitude modulated radio signals. The signal may be amplified before detection, but if un-amplified, a very low voltage drop diode must be used. When using a rectifier for demodulation the capacitor and load resistance must be carefully matched. Too low a capacitance will result in the high frequency carrier passing to the output and too high will result in the capacitor just charging and staying charged.

Kingtronics’s fast recovery rectifier diodes are very popular in the overseas market, According to the rectifier’ s application , Our Kingtronics managing ordinary rectifier diodes, ultra-fast rectifier diodes. In our Kingtronics website ,we have detailed PDF about all kinds of diodes & rectifiers.

The steady-state and dynamic reliability of a tantalum capacitor are influenced by several factors under the control of the circuit design engineer. These factors are voltage derating, ripple current and voltage conditions, maximum operating temperature and circuit impedance. Tantalum capacitors possess very low electrical leakage (high leakage resistance), and will retain a charge for a long duration. They are tolerant of hot operating environments up to 125 °C, unlike standard aluminum electrolytic capacitors. Tantalum capacitors are relatively expensive, particularly the military grades. They are not particularly tolerant of heavy charge and discharge currents, particularly those of a repetitive nature, and their effective series resistance (ESR) can be high when compared to ceramics or aluminum electrolytics.

Kingtronics produce tantalum capacitors since 1997, include dipped tantalum capacitors (through hole capacitors), general purpose chip tantalum capacitors (surface mount) and Low-ESR chip tantalum capacitors (surface mount).

Contact us

Tel: (86) 769 8118 8110
Tel: (852) 8106 7033
Fax: (852) 8106 7099
Skype: kingtronics.sales


Kingtronics International Company was established in 1995 located in Dongguan City of China to handle all sales & marketing for factories located in Chengdu, Sichuan and Zhaoqing, Guangdong, China. In 1990, we established the first factory to produce trimming potentiometer and in 1999 we built up new factory in Zhao Qing, Guangdong. Now with around 850 workers, Kingtronics produce trimming potentiometers, dipped tantalum capacitors, multilayer ceramic capacitors, and diode & bridge rectifier. We sell good quality under our brand Kingtronics, and Kt, King, Kingtronics are our three trademarks. All our products are RoHS compliant, and our bridge rectifier have UL approval. Please visit our Products page, you could please download all our PDF datasheet and find cross reference for our Trimming Potentiometer and capacitors.

Tantalum and Ceramic Capacitors Cross Reference ↓ Download
Diodes & Rectifiers List(PDF: 97KB) ↓ Download
Trimming Potentiometer Cross Reference ↓Download

Meet Kingtronics in Moscow soon
Chip EXPO 2017
Chip EXPO 2017
"Expocentre" Moscow Russia
Date: Oct 31 - Nov 2nd, 2017
Booth No.: B 20

Meet Kingtronics in Munich soon
Electronica 2018
Electronica 2018
New Munich Trade Fair Centre, Germany
Date: 13-16 November, 2018
Booth No.: To be advised


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