Kingtronics Blog

The reliability of a potentiometer depends on its ability to continue performing its intended function. Since the primary function is to provide a continuous and proportional voltage output, the primary reliability considerations are continuity and proportional voltage output. A failure in continuity is always catastrophic, as the device is no longer acting as a potentiometer.

The primary constituents of continuity are:

Wiper contact to conductive surface

Continuous conductive surface

Wiper (output) and excitation terminal continuity

The frequency of the quartz crystal is obviously a fundamental specification. It is normally expressed to as many significant figures as demanded by the frequency tolerance, although seven figures is normally the maximum. It is wise to express the frequency to the right number of significant figures to avoid misunderstandings in this area of the quartz crystal specification.

Kingtronica Quartz Crystal series are popular in the word market , Quartz Crystal include HC49U, HC49S and SMD quartz crystal HC49SMD .The HC49U is available in tight tolerances and stabilities for demanding applications. With a broad frequency range from 1.8432MHz to 200.000MHz, the HC49U can serve as a low cost solution in virtually any application or market.

A correctly selected arrester can diver surges almost endlessly ,provided the energy to be dissipated is within the capability of the arrester .In the event that an arrester is required to dissipate more energy than it is capable of, it will sacrifice itself by failing short circuit. Most commonly, arrester are connected phase – to – ground and the resultant earth fault will immediately collapse the voltage on that phase, thereby protecting other equipment an the same phase, The upstream protection will initiate a breaker trip to clear the fault, and the failed arrester can then be replaced.

Surge Arrester housing have traditionally been made of porcelain .However , today there is a stronge Arrester housing have traditionally been made of porcelain .However , today there is a strong trend ,and often even a preference ,towards the use of silicone insulators for arrester at all system voltage. There are a number of reasons why silicone is seen as an attractive alternative to porcelain, including potentially better short-circuit capability with increased safety for other equipment and personnel if correctly designed.

Diode have many types: ordinary rectifier diodes, ultra-fast rectifier diodes, transient voltage suppression diodes, switching diodes, high voltage diodes, diode bridge rectifier, SMT surface mount fast recovery diodes, surface-mount schottky diodes SMD, fast recovery rectifier diodes, schottky diodes, bi-directional trigger diodes, zener diodes,damping diodes, ordinary surface mount diodes SMT, SMT surface mount ultra-fast diodes, TO-220 packaged diodes, power snubber diode, etc.

Below are Kingtronics bridge rectifier full list, do you buy any of these? Kindly send your inquiry to info@kingtronics.com

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Kingtronics team

Kingtronics is a manufacturer of capactiors. We are offering two types of tantalum capacitor, chip tantalum capacitor (SMD) and Dipped tantalum capacitor (Radial).

For dipped tantalum capacitor, Kingtronics has 3 production lines and its out put is at 2.5KK /month. The production ability is quite strong.

The tantalum capacitor is a highly reliable type of solid capacitor or electrolytic capacitor. Surface mount tantalum capacitors are increasingly being used in circuit designs because of their volumetric efficiency, basic reliability and process compatibility.

Tantalum capacitors are manufactured from a powder of relatively pure tantalum metal. The typical particle size is between 2 and 10 μm.

Dipped tantalum capacitors' size is very small, so radial tantalum capacitors are used where a large capacitance is needed in a small size.

On Kingtronics tantalum capacitor product body, it printed with its capacitance and voltage. For packaging, Kingtronics has two package methods, bulk and Ammo.

Dielectric Voltage - The dielectric (insulation of Potentiometer "guts" to the body) rating is especially important if the Potentiometer is connected to mains operated, non-isolated equipment. Wall mounted lamp dimmers and such are typical examples. This is not commonly specified, but for safety, should be at least 2.5kV. A common way to achieve this is to use a plastic shaft, with the body of the Potentiometer insulated from the chassis, and inaccessible by the user - even if the knob falls off or is removed! This point cannot be stressed highly enough.

Most standard Potentiometer will safely withstand (maybe) 100V or so between the resistance element and terminals, and the body and shaft. Miniature types will usually be less than this. Never, ever, use a standard Potentiometer with a metal shaft to control direct mains operated equipment. Even if the Potentiometer case is earthed, the voltage rating between the internal element(s) and terminals to the case is often unspecified, and is almost always completely unsuited to mains voltages.

Ceramic chip capacitors should be stored in normal working environments. While the chips themselves are quite robust in other environments, solder ability will be degraded by exposure to high temperatures, high humidity, corrosive atmospheres, and long term storage. In addition, packaging materials will be degraded by high temperature – reels may soften or warp, and tape peel force may increase. Kingtronics International Company recommends that maximum storage temperature not exceed 40℃, and maximum storage humidity not exceed 70% relative humidity. In addition, temperature fluctuations should be minimized to avoid condensation on the parts, and atmospheres should be free of chlorine and sulfur bearing compounds. For optimized solder ability, chip stock should be used promptly, preferably within 1.5 years of receipt

The temperature stability is another important area of the crystal specification and it is the allowable frequency deviation as the temperature varies. Again normally expressed in ppm, from the frequency at the reference temperature per degree Celsius. Sometimes the crystal specification may use a frequency tolerance consisting of the sum of the calibration and temperature stability tolerances is quoted.

Over the Operating Temperature Range, an amount of total deviation acceptable for the application. Tighter specifications of Stability lower yield in Quartz Crystal Blank production thereby serving to increase production costs

Kingtronics offers high quality quartz crystal at incredibly aggressive prices. The HC49S series is an industry standard crystal package. HC49S is a low cost, low profile timing option for applications where cost is critical.

The HC49S is available in tight tolerances and stabilities for demanding applications. With a broad frequency range from 3.200MHz to 90.000 MHz, the HC49S can serve as a low cost solution in virtually any application or market.

Tantalum Capacitors offer many advantages over other types of capacitor. This has meant that their use has risen considerably over the years, and now they are widely used in all forms of electronics equipment. The advantages of Tantalum Capacitors can be summarised:

Volumetric efficiency: Tantalum Capacitors offer a very high level of volumetric efficiency - much greater than many other types. In particular they are better than electrolytic capacitors which are their main rival.

Good frequency characteristics: The frequency response of Tantalum Capacitors is superior to that of electrolytic capacitors. This means that they are more suitable for use in a number of applications where electrolytics could not be used.

High reliability: Tantalum Capacitors are more reliable than many other forms of capacitor. Provided they are operated within their ratings they are able to provide an almost unlimited life. Their use is not time limited as in the case of electrolytic capacitors.

Wide operating temperature range: Tantalum Capacitors are able to operate over a very wide temperature range. They are often specified for operating over the range -55℃ to +125℃. This makes them an ideal choice for use in equipment for use in harsh environmental conditions.

Compatibility with modern production methods: Modern production techniques often expose components to high temperatures during soldering as the whole assembly is heated by infra-red heat. Using conventional leaded components only the board surface was heated and the amount of heat conducted by the leads was usually insufficient to damage the components. Tantalum capacitors are able to withstand the temperatures of SMT production and are there fore ideal for use in many new electronics designs.

Kingtronics produced tantalum capacitor since 1997, including dipped tantalum capacitors (through hole capacitors), general purpose chip tantalum capacitors (surface mount). Now the raw material of chip tantalum capacitor is in great shortage, its price is unstable and will increase at any time, without any cutoff date!

In case you have any inquiry for chip tantalum capacitor, please send to us (info@kingtronics.com) at earliest before the price jumping up!

Kingtronics can offer 4 cases: A Case, B Case, C Case and D Case! Tolerance can be +/-20% and +/-10%

For A Case: capacitance can be from 0.1uF until 33uF and voltage can be from 6.3V until 50V
For B Case: capacitance can be from 0.47uF until 100uF and voltage can be from 6.3V until 50V
For C Case: capacitance can be from 1uF until 220uF and voltage can be from 6.3V until 50V
For D Case: capacitance can be from 1uF until 220uF and voltage can be from 6.3V until 50V