jb Metallized Polypropylene Film Capacitors DC Link and High Power - JFQP Series

JFQP Density MKP DC Link-High Power Film Capacitors are metallized polypropylene film capacitors that feature good self-healing properties. These products provide high reliability, low ESR with high current capability, as well as a long useful life.

DC-Link capacitor for DC-filtering and energy buffering, targets power electronics devices for frequency converters, industrial and high-end power supplies, and solar inverters.

jb Metallized Polypropylene Film Capacitors DC Link and High Power - JFQP Series

jb Tell you more about Trimmer Capacitor

trimmer capacitor is a variable capacitor used for initial calibration and recalibration of equipment. It is commonly mounted directly on a PCB and accessed only by professional repairmen, not the end-user.

Characteristics
Voltage rating, capacitance range, polarity.
Trimmer capacitors can be rated for voltages up to 300 volts, although voltage ratings of up to 100 volts are much more common. Since trim caps are variable capacitors, they come in a capacitance range rather than a
single capacitance value. The minimum capacitance is usually between 0.5 pF and 10 pF, while the maximum capacitance is usually between 1 pF and 120 pF. The actual capacitance value can be varied between the
minimum and maximum capacitance values for a given trimmer capacitor, but it can never be set to zero. It is worth noting that trimmer capacitors are not polarized.

Tolerances and accuracy
Trimmer capacitors do not boast a good capacitance value tolerance. Sometimes, the tolerances can be as high as -0 to +100%. This means that a trimmer capacitor can have a maximum capacitance two times larger
than nominal. However, bad tolerances do not pose a great problem to engineers because trimmer capacitors are variable. Even if the maximum value is different between individual capacitors, they can still be set by turning the screwdriver a certain angle. Accuracy depends mostly on the operator, as he can choose to spend more time in order to set the capacitor to a desired value. Often, trimmer capacitors are set by robots instead of human operators, and they can achieve much better precision. In order to achieve a better accuracy, it is advised to use a non-metallic tool, since metal screwdrivers will introduce a source of capacitance that will vary the capacitance value when the tool is moved away from the capacitor.

Construction and properties of trimmer capacitors
There are two types of trimmer capacitors: air trimmer capacitor and ceramic trimmer capacitor. These two types use different materials as the dielectric. Both types use rotating action to change the capacitance value.
The construction of trimmer capacitors is similar to the construction of their larger variant, the variable capacitor. Trimmer capacitors can be made of semi-circular metal plates. One is fixed, while the other can be rotated using a screwdriver. The user changes the capacitance by rotating the shaft and increasing or reducing the amount of overlap between the two plates. Gear mechanisms may be used to improve the precision by allowing multiple turns between the lowest and highest settings.

Another way to make a trimmer capacitor is to place a metallic screw in a non-conductive threaded cylinder. The screw represents one electrode, while the other is located at the base of the cylinder. By rotating the screw, the distance between the two plates is varied which results in a change of capacitance. This construction is used in RF and microwave applications. 

jb Capacitors Aluminum Electrolytic Capacitors Application and Advantages

We know that there are many types of capacitors, depending on the material, application, characteristics and size.

let us talk about aluminum E-cap today which is always be in great demand in market.
 
Compared with other types of capacitors, aluminum E-cap can offer big capacitance and very high price advantage, main use for rectification and filtering circuit.
 
Application field can used in industrial inverters, servo drives, power supplies, home appliances such as TV sets, inverter air conditioners, new energy sources such as photovoltaic power generation, wind power generation, etc.
 
There are many brands in the market that produce aluminum electrolytic capacitors. Have you found a supplier you can trust?
 
jb offer wide series for different application, our output is 2KK at least each Month. 
 
We are not only offer competitive price also make sure stable quality.
All products print our brand name "jb", we have responsibility for all products we sell.
 
Welcome to send your RFQ to us, we will find our alternatives and quote for your reference.


jb SMD Aluminum Electrolytic Capacitors Unbeatable Offer In April, 2014

Nowadays, jb is aggressively promoting SMD Surface mount capacitors! You may received some prices from us last month.
Welcome to collect such inquiry and send to us, we will revert back you a unbeatable price!
 
Quite competitive Price & quality, flexible MOQ based on customer request, free samples!