Kingtronics Blog

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.

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

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

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 / dipped type for MLCC and tantalum capacitors. We produce these parts.

2. We're ISO 9001:2008 manufacturer since 1990. Maybe we can help you solve above problems. 
    a. Quality is very good. With ISO, UL & SGS approval.
    b. Prices are competitive on the market, maybe not the lowest, but it costs our valued products.
    c. Good package & Fast delivery time.

3. We also sell our parts to Newark Farnell (Element 14), Avnet Abacus, Compel, YE International...

4. Different from other suppliers, our service is very good, enjoy good reputation on the market. 
    We show our products in Munich Electronica, Moscow Expo Electronica, Brazil FIEE, HK Asia Electronica.

5. Below is our Passive components we produce, kindly please check if you have inquiry for us.
MKT: Radial multilayer ceramic capacitor.
http://www.kingtronics.com/mlcc-capacitors/radial-mlcc-capacitors.html

LKT:  Chip multilayer ceramic capacitor
http://www.kingtronics.com/mlcc-capacitors/smd-mlcc-capacitors.html

HKT:  High voltage multilayer ceramic capacitor
http://www.kingtronics.com/mlcc-capacitors/high-voltage-mlcc-capacitors.html

TKT:   Dipped tantalum capacitor.
http://www.kingtronics.com/tantalum-capacitors/dipped-tantalum.html

CKT:  Chip tantalum capacitor
http://www.kingtronics.com/tantalum-capacitors/chip-tantalum-capacitors.html

RKT:  Trimmer potentiometer 3296 3006 3386 3266 3362 3329 3590S SMD C3305...
http://www.kingtronics.com/trimming-potentiometers/

QKT:  Quartz Crystal HC49S, HC49U, HC49SMD.
http://www.kingtronics.com/quartz-crystals/

Trimming-potentiometers, cermet trimmer  (Cross to Bourns, Murata, Tocos, Vishay, BI technology)
RKT-3269, RKT-3296, RKT-3323, RKT-3329, RKT-3362, RKT-3386, RKT-3309, RKT-3540S, RKT-3590, RKT-C3305, RKT-065.

Output 5KKpcs/month, more than 20 years' production experience 

Good quality and free samples are available for quality test

L/T: 3-5 weeks for common items

ISO & SGS certified &  RoHS compliant 

Stop-Clutch: (SC)
A device which allows the wiper to idle at the ends of the resistive element without damage as the adjustment shaft continues to be actuated in the same direction.

Stop-Solid: (SS)
A positive limit to mechanical and/or electrical adjustment.

Stacking:
The mounting of one trimming potentiometer adjacent to or on top of another utilizing the same mounting hardware.

Theoretical Resolution :
(Wirewound only) The theoretical measurement of sensitivity to which the output ratio may be adjusted and is the reciprocal of the number of turns of wire in resistance winding expressed as a percentage.
N = Total number of resistance wire turns.
1/N X 100 = Theoretical resolution percent

Printed Circuit Terminal: (P, W&X)
Rigid uninsulated electrical conductor so arranged, suitable for printed circuit board plug-in.

Solder Lug Terminal: (S)
Rigid uninsulated electrical conductor so arranged, suitable for external lead attachment.

Wiper: (SL)
The wiper is the member in contact with the resistive element that allows the output to be varied with the mechanical member adjustment.

Multiturn Adjustment : 
Requires more than 360° mechanical adjustment to cause the wiper to traverse the total resistance element.

Terminal : 
An external member that provides electrical access to the resistance element and wiper.

Leadwire Type: (L)
Flexible insulated conductor.

Resistance Element :
A continuous, unbroken length of resistive material without joints, bonds or welds except at the junction of the element and the electrical terminals connected to each end of the element or at an intermediate point such as a center tap.

Adjustment Shaft :
The mechanical input member of a trimming potentiometer which when actuated causes the wiper to traverse the resistance element resulting in a change in output voltage or resistance.

Single Turn Adjustment :
Requires 360° or less mechanical input to cause the wiper to traverse the total resistance element.

For more products information please check: http://www.kingtronics.com/trimming-potentiometers/

Trimming Potentiometers:
An electrical mechanical device with three terminals. Two terminals are connected to the ends of a resistive element and one terminal is connected to a movable conductive contact which slides over the element, thus allowing the input voltage to be divided as a function of the mechanical input. It can function as either a voltage divider or rheostat.

Wirewound Trimming Potentiometer:
A trimming potentiometer characterized by a resistance element made up of turns of wire on which the wiper contacts only a small portion of each turn.

Non- Wirewound Trimming Potentiometer:
A trimming potentiometer characterized by the continuous nature of the surface area of the resistance element to be contacted. Contact is maintained over a continuous, unbroken path. The resistance is achieved by using material compositions other than wire such as carbon, conductive plastic, metal film and cermet.

For more products information please check：http://www.kingtronics.com/trimming-potentiometers/