Kingtronics Blog

I am sales Kelly from Kingtronics, which is HK based manufacturer, specialized in diode rectifier, bridge rectifier, and transistors.

Small Signal Switching Diode LL4148 Mini Melf, Have 5 Millions Pieces in Stock, First come First serve

Diode rectifier M7 also  have regular stock.

Diode S1M diode have better price offer than before.

May I ask, if you receive our prices offer for bridge rectifier MB10S and DB107? Our bridge rectifier have UL approval.  If you still need UL certification or prices offer for MB10S and DB107, please tell meinfo@kingtronics.com  , OK? I will resend to you.

Please check below our strong items, your any inquiry will be appreciated.

Transistors:  2N3904, 2N3906, 2N5401, 2N5550,2N5551, MMBT3904, MMBT3906, MMBT8050/8550 C/D, MMBT8050/8550(1.5A) C/D, MMBT8050/8550(2A)C/D; MMBT9012G/H; MMBT9013G/H; MMBT9014B/C/D; MMBT9015B/C/D; MMBT9018G/H

Diode rectifier: M7, S1M, LL4148, RS1M, SM4007 melf, BZV55C & ZMM55C, UF4007, 1N4001S-1N4007S, 1N4001-1N4007, 1N5391-1N5399, RL201-RL207, 1N5400-1N5408, 6A05-6A10, FR101-FR107, 1N4933-1N4937, FR151-FR157, FR201-FR207, 1N5817-1N5819, 1N5820-1N5822

Bridge rectifier:  DB101-DB107, DB101S-DB107S, MB2S-MB10S, KBL4005-KBL410, KBU6005-KBU610, KBPC25005-KBPC2510, KBPC25005W-KBPC2510W, KBPC35005-KBPC3510, KBPC35005W-KBPC3510W

Best wishes!

Kingtronics offer high quality and competitive transistor, welcome to send us inquiry!

Telecommunications installations as well as CATV amplifiers, CB transmitters, home entertainment systems, computers and similar equipment can be exposed to voltage surges conducted via the power network. The combination of a surge arrester and a varistor offers proven protection in these cases. The phase and neutral conductors are connected to ground potential of both protection elements.

Bridge Rectifier Series:
DB101-DB107
DB101S-DB107S
MB1S-MB10S
KBL4005-KBL410
KBU6005-KBU610
KBPC25005-KBPC2510
KBPC25005W-KBPC2510W
KBPC35005-KBPC3510
KBPC35005W-KBPC3510W

A bridge rectifier makes use of four diodes in a bridge arrangement to achieve full-wave rectification.

This is a widely used configuration, both with individual diodes wired as shown and with single component bridges where the diode bridge is wired internally.

Kt Kingtronics offers leaded quartz crystal HC49U, HC49S and SMD quartz crystal HC49SMD. The quartz crystal market, in general, requires hands on customer service. Quartz crystals are manufactured for frequencies from a few tens of kilohertz to tens of megahertz. More than two billion (2×109) crystals are manufactured annually. We also stock crystals in most popular package styles, frequencies and specifications for quick delivery.

49USMD crystals are low profile surface mount crystals with the same footprint as standard HC49 and HC49-4H crystals. 49USMD crystals are ideal for use in low cost, mass-market applications but are also able to be produced to close tolerances when required. With a broad frequency range from 3.200MHz to 90.000 MHz, the HC49SMD can serve as a low cost solution in virtually any application or market. The HC49SD is available in surface mount (SMD) packaging only.

Tantalum capacitors offer several advantages over conventional multi-layer ceramic chip capacitors, such as larger capacitance in a more compact form factor and superior temperature and DC bias characteristics. Kingtronics broad lineup of tantalum capacitors include models that utilize a bottom electrode configuration, low ESR conductive polymer types, units with an open structure to prevent combustion and damage to peripheral components, and standard products featuring excellent mount ability and reliability.

ESR has been significantly reduced due to utilization of a conductive polymer instead of conventional manganese dioxide. In addition the conductive polymer type reduces the risk of smoke or ire compared with conventional products.

Gas-filled surge arresters operate on the gas-physical principle of the highly effective arc discharge. Electrically, surge arresters act as voltage-dependent switches. As soon as the voltage applied to the arrester exceeds the spark-over voltage, an arc is formed in the hermetically sealed discharge region within nanoseconds. The high surge current handling capability and the arc voltage, which is almost independend of the current, short-circuit the overvoltage. When the discharge has died down, the arrester extinguishes and the internal resistance immediately returns to values of several 100 MΩ.

The surge arrester thus meets almost perfectly all requirements made on a protective element. It reliably limits the overvoltage to permissible values, and – under normal operating conditions – the high insulation resistance and the low capacitance contribute to the fact that an arrester has virtually no impact on the system to be protected.

The capability of the surge arrester in energy dissipation against switching surge is well expressed by the magnitude of kJ/kV (arrester rated voltage). These values show the dissipated total energy per two shots of switching surge that the surge arresters can withstand thermally with these values. Where the energy capability is inadequate in our standard series.

Typical structure of surge arresters are shown in Figure below .The surge arresters are basically composed of the TNR elements, housing and associated parts with insulating gas filling as shown in figures. The hermetic sealing of the housing is constructed with weather-proof synthetic rubber. The pressure relief diaphragm is structured with special metal plate, which is ruptured when a sudden pressure rise occurs in case of the internal failure.

Tantalum Capacitors are inherently polar devices and may be permanently damaged or destroyed if connected with the wrong polarity. The positive terminal is identified on the capacitor body by a polarity mark and the capacitor body may include an obvious geometrical shape.

However, some Series contain two capacitors connected (negative-to-negative) to form “non-polar” capacitors. Rated voltage  may be applied to these Series in either direction.

The low leakage and high capacity of tantalum capacitors favors their use in sample and hold circuits to achieve long hold duration, and some long duration timing circuits where precise timing is not critical. They are also often used for power supply rail decoupling in parallel with film or ceramic capacitors with low ESR and reactance at high frequency. Tantalum capacitors can replace aluminum electrolytic capacitors in situations where the external environment or dense component packing results in a sustained hot internal environment and where high reliability is important. Equipment such as medical electronics and space equipment that require high quality and reliability make use of tantalum capacitors.

Low-voltage tantalum capacitors are commonly used in large numbers for power supply filtering on computer motherboards and in peripherals due to their small size and long-term reliability.