Dear All,

Now we are nearly selling out our rest 2kkpcs LL4148 stock.

We have the lowest price with excellent quality, so we sold out a lot soon. Pls don't miss the chance of our last 700kpcs LL4148 stock. Send us your request now.

Our Stock Notification:
LL4148 LL-34 T&R RoHS SPQ:2.5kpcs/reel  only 700kpcs stock available now.

Looking forward to hear from you soon.

Thanks a lot in advance.

Kingtronics sales team

Selection Criteria
The initial considerations for trimmer type selection are:
A. Resolution of adjustment
B. Setability and time to set

C. Physical and environmental conditions

D. Stability of setting required

E. Circuit packaging requirements

C. Physical and Environmental Issues

1. Physical considerations in trimmer selection
• Case style desired
• Top or side adjust
• Pin style required
• Mechanical support required
• Board height requirements

2. Assembly process considerations
BI offers a variety of trimmer models that are sealed to help protect against moisture and board washing processes.
•Open vs. Sealed
• Max time/temperature exposure 

3. Environmental operating considerations
• Operating temperature range
• Resistance temperature coefficient
• Vibration and shock tolerance 

4. Human operating conditions When you complete your design, be careful to consider the tortures that clever human beings with a screwdriver in hand can impose on trimmers. For example, while a trimmer configuration mounted on edge might be a board space saver, a trimmer that mounts flat on the board may be more resistant to abuse by a heavy handed technician making adjustments through a hole in the chassis.

Kingtronics is growing increasingly better in these years. We provided our customers with new products, special offer, good service.

Recently, our colleagues in Taiwan office have started working since 1st March, 2016. The Kingtronics sales team has been enriched to help our customers. 

Hoping both Kingronics and our customers can grow together to achieve a wonderful future.

Selection Criteria
The initial considerations for trimmer type selection are:
A. Resolution of adjustment
B. Setability and time to set

C. Physical and environmental conditions

D. Stability of setting required

E. Circuit packaging requirements

B. Setability and Time to Set
The enemies of setability are poor resolution, mechanical backlash and high CRV. BI has addressed these problems in the design of trimmer models. BI’s smooth cermet materials, precious metal split brush contacts and teflon rotors work together to provide outstanding setability.

“Time to set” tests show the following:

Setting Attributes

Single Turn


High accuracy



Fastest to high accuracy



Fastest to approximate setting



Thanks to our UK distributor Electron Electronics' trust and efforts, we were advertised on page 75 of Electronics Sourcing's annual edition in 2016 (UK & Ireland).

This is a very popular magazine published globally in UK & Ireland, North America, Europe, Germany etc.

It's our great honor to cooperate with so reliable partner. Let's grow together and make new achievement this year! Thank you very much.

II. Selection Criteria
The initial considerations for trimmer type selection are:
A. Resolution of adjustment
B. Setability and time to set

C. Physical and environmental conditions

D. Stability of setting required

E. Circuit packaging requirements

A. Resolution of Adjustment
1. Multiturns
 Multiturns provide better resolution than single turns. Models with a longer element exhibit better resolution than those with a short element. Typical multiturn shaft revolutions range from 15 to 20 turns for end to end travel.
 The contact design and stability are important considerations in achieving high resolution. The contact area must be small and the contact must move smoothly in order to provide high resolution. A noisy contact will make accurate setting very difficult.
 All trimmers utilize smooth cermet materials, precious metal wire brush contacts and backlash-free wiper designs that ensure high resolution setability.
 Reference multiturn models:
Square multiturns - 44, 64, 66, 67, 68
Rectangular multiturns 78, 89

2. Single Turns
 Single turn resolution for models with a longer cermet element (larger diameter) is quite respectable. This is especially true with wire brush contacts and smooth cermet films.
 Reference single turn models:
Small diameter - 24, 25, 62, 82
Larger diameter - 72, 91, 93

3. Surface Mount Models
 Single turn - 21, 23, 83
 Multiturn - 44, 84

Today we would like to take this opportunity to introduce you some Chinese traditions.

Qing Ming is a time to remember the dead and the dearly departed. More important, it is a period to honor and to pay respect to one's deceased ancestors and family members. Because it reinforces the ethic of filial piety, Qing Ming is a major Chinese festival.

Literally meaning "clear" (Qing) and "bright" (Ming), this Chinese festival falls in early spring, on the 106th day after the winter solstice. It is a "spring" festival, and it is an occasion for the whole family to leave the home and to sweep the graves of their forebears. Chinese being practical people this sweeping of the graves is given an extended period, that is, 10 days before and after Qing Ming day. Among some dialect groups a whole month is allocated.

Ching Ming Festival, the custom is to enrich interesting, in addition to pay attention to ban fire, grave, as well as hikers, swinging, Cuju, playing polo, Liu inserted a series of custom sports. According to legend, this is because the Ching Ming Festival to Cold Food Observance ban fire, in order to prevent the Cold Food Observance buffet beverages, so we come to participate in some sports, in order to exercise. Therefore, this festival in both sweeping grave,expressing feelings of sorrow, another outing laughter of play, is a distinctive holiday.

A trimmer can be used as potentiometer or rheostat. A potentiometer is a three terminal device typically used to vary voltage. In potentiometric configurations, the wiper terminal is lightly loaded so that wiper current is generally small.

A rheostat is a two terminal device typically used to control current. Wiper current is generally larger in rheostat circuits.

I. Types of Applications
The majority of applications for trimmers occur in electronic circuits. 
Typical uses are in the following devices:
A. Amplifiers
B. Timing circuits

C. Voltage and current regulators

D. Voltage and frequency converters

Kingtronics always make effort to provide customers more information and better service. Our new packing boxes and video have been shown to our customers.

Recently, we adopt attractive and durable new packing boxes to provide better protection for our products, including trimmer, MLCC, tantalum capacitor. The packing photos can be checked by below links.
The best way to know Kingtronics is to click below links to watch our video. 
You can know our development history, productive process, product display, exhibition attending...
All our products are produced completely automatic in dust-free plant. That is why we can offer our customers with good products and short lead time.
More efforts will be made to realize better Kingtronics.


The ability of materials to be welded together under specified conditions.

The ability of the terminals to withstand specified mechanical stresses without sustaining damage that would affect utility of the terminals or operation of the trimming potentiometer.

The ability of the unit to withstand submersion in acceptable cleaning solutions used in normal soldering processes without performance degradation under specific environmental conditions.

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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