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!

Capacitors are devices which store electric charge. They are usually made from two parallel metal surfaces with some insulating dielectric layer between them. If one of the plates is charged, and the other is grounded,  opposite charges will accumulate on it  by influence, while the net charge stays zero. The capacitance is the magnitude of charge on one plate Q divided by the voltage V across the plates.

The unit of capacitance is the farad. 1 F = 1As/V

The capacitance of two parallel metal plate of area A and d distance apart (supposed that the lateral sizes of the plates are much bigger than the distance between them) is

where e is called the permittivity of the insulating material between the plates.

The permittivity of vacuum is e0 = 8.85 ×10-12 As/(Vm).

The capacitance can be increased by applying high permittivity material between the metal plates, like paper, plastic, oil, mica, or ceramic. Typical capacitance values range from about 1 picofarad (pF, 10-12 F) about 1000 microfarads (mF, 10-6 F)

The symbol for capacitor in circuit diagrams is:

The capacitors are rated according to the voltage that can be safely applied across their terminals - breakdown voltage.

The energy stored in a capacitor is

Electrolytic capacitors use aluminium or tantalum plates immersed in a semi-liquid chemical compound which forms a thin insulating oxide layer on one of the electrodes. These types of capacitors are said to be polarized and can be used only in such way that the terminal denoted by “+” is always at higher potential as the “–“ one. Because of the thin oxide layer, the capacitance of the electrolytic capacitor is usually high, 1-1000 mF.

Dipped tantalum capacitors also have high capacitance but small size at the same time. They are made of a sintered tantalum powder core. Because of the pores, it surface is very large. The core is oxidized. The core is dipped into manganese nitrate solution,  than put in a furnace where  the nitrate decomposes into manganese oxide which fills the pores and serves as the other electrode to the capacitor.

Design of a Bridge Rectifier

Bridge rectifiers change AC voltage into DC voltage.
They are used in a wide variety of electronics and most often found in AC powered devices,
modern home telephones, simple plug-in power supplies and even in high horsepower motor controllers.
Many modern devices have benefited from these solid-state silicon semiconductor devices,
as they have replaced the failure-prone metal oxide rectifiers used many years ago.

Function

Bridge rectifiers can be either in a 'half wave' or a 'full wave' configuration.
Electrolytic filter capacitors are commonly added to smooth the rectification pulsations.
The device can also be used for assuring that DC (battery) power happens in a fixed way
even if the battery is connected improperly. In modern telephones,
they assure proper connectivity and electrical isolation to the incoming phone lines.
Even if the phone wires are miswired, the phone will still work properly.

Kingtronics are a producer of bridge rectifier with many years. We have got UL Certificate for our bridge rectifier.

Here are our Bridge rectifier items: DB107, MB10S, KBL4005，KBU610, KBPC2510，KBPC2510W, KBPC35005-KBPC3510, KBPC3510W........etc..

Any inquiry, pls send email to anna@kingtronics.cn

Hi everyone,

How are you, I am Karen from Kingtronics International company. Are you looking for trimming potentiometer? I am sure Kingtronics is your best choice!

Kingtronics are very professional in trimming potentiometer, items like 3296 3006 3386 3590...these are very famous!

We have the competitive price in the market,fast delivery and high quality,we also cross the famous brand for you.
If you need trimming potentiomet,pls send your requirement to sales2(at)kingtronics.com.
Pls check SGS and Cross reference on below links:

SGS: http://www.kingtronics.com/pdf/sgs.pdf
Cross reference: http://www.kingtronics.com/pdf/cross-reference.pdf

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

Features

• Low-cost, industry-standard crystal unit
• AT-Cut strip crystal with hermetically sealed can
• Frequency range 3.200MHz to 90.00MHz
• Package height options available

Description

HC-49S crystals share the same base outline as the industry standard HC49 crystal. The crystal uses at AT-cut strip crystal with an hermetically sealed can. HC-49S crystals provide a low cost source of system clock frequency.

Multilayer ceramic capacitors with silver/palladium (Ag/Pd)terminations have often been used in medical applications where non-magnetic components are required, for example in MRI equipment. The use of conventional nickel barrier terminations is not suitable due to nickel exhibiting magnetic properties.

However, RoHS requirements have dictated the use of lead-free solders, and the composition of these solders has resulted in an increase in soldering temperatures. This has caused solder leaching problems for the Ag/Pd termination, and meant alternative terminations have had to be found.

This copper barrier termination is offered with selected nonmagnetic C0G/NP0, High Q and X7R dielectrics, providing a fully non-magnetic component.

To view the data sheet, including the range of capacitance values, please click http://www.kingtronics.com/pdf/Kingtronics-Tantalum-and-Ceramic-Capacitors-Cross-Reference.pdf

Tantalum electrolytic capacitors now available have mainly three categories of the solid sintered, foil winded and wet sintered type.

tantalum chip capacitors are playing a dominant role in the markets along with the development of technology, miniaturization is in the ascendant and the ratio of chip type to all types of capacitors is growing, Among them, the sintered solid accounts for over 95％ of the current total production, dominated by non－hermetical epoxy-encapsulated tantalum capacitor.

Solid tantalum capacitors have advantages of excellent electrical performance, wide working temperature range, good volume efficiency and various forms of encapsulation.

Kingtronics sell good quality under our brand Kingtronics. All our products are RoHS compliant,pls see cross reference:

http://www.kingtronics.com/pdf/chip-tantalum-capacitors.pdf

Is it possible to obtain more pulses than twice the number of phases in a rectifier circuit? The answer to this question is yes: especially in polyphase circuits. Through the creative use of transformers, sets of full-wave rectifiers may be paralleled in such a way that more than six pulses of DC are produced for three phases of AC. A 30o phase shift is introduced from primary to secondary of a three-phase transformer when the winding configurations are not of the same type. In other words, a transformer connected either Y-Δ or Δ-Y will exhibit this 30o phase shift, while a transformer connected Y-Y or Δ-Δ will not. This phenomenon may be exploited by having one transformer connected Y-Y feed a bridge rectifier, and have another transformer connected Y-Δ feed a second bridge rectifier, then parallel the DC outputs of both rectifiers. Since the ripple voltage waveforms of the two rectifiers' outputs are phase-shifted 30o from one another, their superposition results in less ripple than either rectifier output considered separately: 12 pulses per 360o instead of just six