Kingtronics Blog

We will have a CNY holiday soon, but we have specially prepared below stock for you. Don't worry about the lead time during this period.

Pls feel free to conatct us even in CNY holiday. Our sales office will be only closed from 6th Feb to 10th Feb.

Diode Rectifier:                                        
M7 DO-214AC T&R RoHS       10kkpcs stock  (replace diode S1M, SMD 1N4007, GS1M)
LL4148 LL-34 T&R RoHS        8kkpcs stock

Transistor BC847A/B/C SOT-23 T&R RoHS 
Transistor BC807-16/25/40 SOT-23 T&R RoHS

Switch diode BAV70 SOT-23 T&R RoHS 
Switch diode BAV99 SOT-23 T&R RoHS

CONTACT RESISTANCE VARIATION: (CRV)
The apparent resistance seen between the wiper and the resistance element when the wiper is energized with a specified current and moved over the adjustment travel in either direction at a constant speed. The output variations are measured over a specified frequency bandwidth, exclusive of the effects due to roll-on or roll-off of the terminations and is expressed in ohms or % of Rt.

EQUIVALENT NOISE RESISTANCE: (ENR)
(Wirewound only) Any spurious variation in the electrical output not present in the input, defined quantitatively in terms of an equivalent parasitic, transient resistance in ohms, appearing between the contact and the resistive element when the shaft is rotated or translated. The Equivalent Noise Resistance is defined independently of the resolution, functional characteristics and the total travel. The magnitude of the Equivalent Noise Resistance is the maximum departure from a specific reference line. The wiper of the potentiometer is required to be excited by a specific current and moved at a specific speed.

Happy New Year. Wish dear all good luck and good health in whole 2016.

The new year, the new beginning. We suggest you to consider our Kingtronics/Kt brand in 2016. Please kindly use 1 minute to check my below email. Thanks. (*^__^*)

1. Do you buy Passive Components? If yes, are there any problems you're facing? Like quality, price, package and L/T...
    Passive Components including trimmer, Quartz Crystal, radial / axial type for MLCC and tantalum capacitors. We produce these parts with RoHS Compliant.

2. We're ISO 9001:2008 manufacturer since 1990. We have confidence to help you with above problems.
a. Quality is very good with ISO, UL & SGS certificates
b. Prices are very competitive on the market

c. Durable package & punctual delivery time
3. We cooperate with Newark Farnell (Element 14), Avnet Abacus, Arrow Electronics, Compel, YE International...
    These distributors are well-known in the components field

4. Different from other suppliers, our service is very good & our brand enjoys good reputation worldwide.
    We show our products at Electronica in Munich, FIEE in Brazil & Asia Electronica in HK

5. Below our passive components for your study. Kindly please check if any exact inquiry for us. Look forward to your business chance in 2016! 
MKT: Radial multilayer ceramic capacitor
AKT: Axial multilayer ceramic capacitor
LKT: Chip multilayer ceramic capacitor
HKT: High voltage chip multilayer ceramic capacitor
TKT: Dipped tantalum capacitor
CKT: Chip tantalum capacitor
RKT: Trimmer potentiometer 3296 3006 3386 3266 3362 3329 3590S SMD C3305...
QKT: Quartz Crystal HC49S, HC49U, HC49SMD.

Regarding specification, please refer to our website http://www.kingtronics.com/

RESISTANCE-TEMPERATURE CHARACTERISTIC: (RTC)
The difference between the total resistance values measured at a reference temperature of 25°C and the specified test temperature expressed as a percent of the Total Resistance.
Where:
R1 = Resistance at reference temperature (25°C) in ohms
R2 = Resistance at the test temperature in ohms

Dear Valued Customers,

Firstly, Kingtronics hope all of you and your familly have a prosperous New Year, we sincerely wish you happiness, cheerfulness and success. ^ ^

Besides, pls keep us informed once you need component support, we are always at you service, hope we win more business together in 2016. Cheers for New Year. 

We are always here for you!

1.> We are a HK based ISO manufacturer, producing components under our own registered brand Kt Kingtronics since 1990, ISO/SGS/RoHS certified 

2.> For a long-term cooperation, we sell our parts to Newark Farnell (Element 14), Avnet Abacus, Compel, YE International...enjoy good reputation in Europe, America, Asia, Afirica...

3.> Do you have related inquiries of trimmer potentiometer(cross Bourns/Vishay/Murata...)/multilayer ceramic capacitor&tantalum capacitor(cross Kemet/Vishay/AVX...)/diode rectifier(cross Diodes/Fairchild..)... welcome to check the best price with us.

TOTAL RESISTANCE: (Rt)
The dc resistance between the input terminals with the wiper positioned to either end stop, or in dead band for continuous rotation potentiometers.

ABSOLUTE MINIMUM RESISTANCE: (Rm)
The resistance measured between the wiper terminal and each end terminal with the wiper positioned to give a minimum value.

END RESISTANCE: (Re)
The resistance measured between the wiper terminal and an end terminal when the wiper is positioned at the corresponding end of mechanical travel.
Absolute minimum resistance and end resistance are synonymous for continuous rotation trimmers.

TEMPERATURE COEFFICIENT OF RESISTANCE: (TC)
The unit change in resistance per degree celsius change from a reference temperature, expressed in parts per million per degree celsius as follows:



Where:
R1 = Resistance at reference temperature in ohms
R2 = Resistance at test temperature in ohms
T1 = Reference temperature in degrees celsius
T2 = Test temperature in degrees Celsius

New Year is coming soon.Wish you have a wonderful holiday in advance.

Below hot sellers many buyers will buy for resale or stock before New Year. Do you have any demand for those? We will try our best to satisfy you well with competitive prices as per your request.

And we are on the stage of evaluating old distributors and develop more potential new distributors, do you have interests in being kingtronics distributor? 

RKT trimmer potentiometer: 3296 3006 3386 3266 3362 3329 3590S SMD C3305
TKT radial tantalum capacitors & MKT radial multilayer ceramic capacitors 

Transistor BC847A/B/C SOT-23 T&R RoHS 
Transistor BC807-16/25/40 SOT-23 T&R RoHS 

Switch diode BAV70 SOT-23 T&R RoHS 
Switch diode BAV99 SOT-23 T&R RoHS 

M7 DO-214AC T&R RoHS 
LL4148 LL-34 T&R RoHS

Dear Valued customers,

Christmas & New Year with the enchanting smell of the holidays encompassing here and there. 

There are only serveral working days in 2015. Pls take the remaining lucky time of 2015 to place orders. We arrange the fast production for you during your holidays and you will have enough stock to meet more customers' demands in the new year 2016. We always would love to work harder for your increasing business. 

Pls email or call us without hesitation. Let's cherish 2015 and welcome 2016 together.~ @ ~ 

Good news to share with  our esteemed Kingtronics customers. A brand new colorful inner carton is born silently.
This inner carton size is 18.5*7*18.5cm, which is suitable for all 7 inches reels packing.

We will gradually change the previous standard carton for below products to this colorful inner carton for all reel packing products.

Quartz Crystals and Oscillators
Didoes LL4148 and Zener Diodes BZV55 Series
LKT Series Chip Multilayer Ceramic Capacitors 
HKT Series High Voltage Chip MLCC Capacitors 
CKT Series Chip Tantalum Capacitors
EKT Series Low ESR Chip Tantalum Capacitors

See more about Kingtronics Packing information, please check below links:
http://www.kingtronics.com/packing/trimming-potentiometers-packing.html
http://www.kingtronics.com/packing/Diodes-Transistors-packing.html
http://www.kingtronics.com/packing/Quartz-Crystals-Oscillators-packing.html
http://www.kingtronics.com/packing/capacitors-packing.html

Different types of diodes have different parameters.We must understand the following main parameters:

4. Reverse Current
Diode reverse current is at a temperature and a predetermined maximum reverse voltage is applied, current flows through the diode reverse. The smaller the reverse current, the conductive performance of the tube in one direction, the better. It is noteworthy that the reverse current and temperature are closely related, the temperature is increased by about 1 0 ℃, the reverse current increases doubled. For example 2APl type germanium diode, at 25 ℃, the reverse current of 250μA, the temperature rises to 35 ℃, reverse current will rise to 500μA, at 75 ℃, its reverse current has reached 8mA, not only lost a single direction of the conductive characteristics, the tubes will overheat and damage. Than the germanium diode silicon diode has good stability at high temperatures.

5. Reverse Recovery Time
From the forward voltage becomes a reverse voltage, ideally instantaneous cut-off current can, in fact, there are generally a little time delay. Determine the amount of current cut-off delay, that is the reverse recovery time. Although it directly affects the switching speed of the diode, but not necessarily say that this value is small enough.

6. Maximum Power
Maximum power is applied across the diode voltage multiplied by the current flowing. This limit is especially important parameter for regulator diodes.

For more products information please check: http://www.kingtronics.com/diodes-rectifiers/