jbcapacitors blog

Jb capacitors company is professional in manufacturing Metallized Polyester Film Capacitors. Our JFB series is one of the top sellers. This product is also known as CL21. It’s great substitution of Vishay MKT 368, Epcos B32591~B32594. Mainly used in power supplies, electronics ballasts etc.

We support very competitive prices and superior product quality.

JFB Specifications:
Operating Temperature: -40°C~ +85°C
Rated Voltage: DC 100V, 250V, 400V, 630V
Capacitance Range: 0.01 ~ 6.8μF
Capacitance Tolerance: ±5%, ±10%, ±20%
Packing: Bulk or Ammo package

jb Capacitors Company manufactures Conductive Polymer Aluminum Solid Electrolytic Capacitors Radial Lead type(PSS, PSR series) and Chip SMD type (JCP series). Polymer capacitors can offer high capacitance in small size, long life, high reliability.

PSS and PSR acquires low Equivalent Series Resistance(ESR), excellent noise reduction capability and frequency characteristic.

These capacitors are widely used in equipment such as: converter, communication power supply, set-top boxes, router, TV, voltage regulator, mobile phone adapter, computer motherboard, graphics card, Decoupling circuits and LCD Monitors etc.

Polymer Aluminum Solid Electrolytic Capacitors List:
PSS - 2000H at 105°C Standard Low ESR Radial Polymer Aluminum Solid Electrolytic Capacitors
PSR - 2000H at 105°C Super Low ESR Radial Polymer Aluminum Solid Electrolytic Capacitors
JCP - SMD Polymer Aluminum Solid Electrolytic Capacitors

Welcome to view our Youtube video to know more about these products: https://www.youtube.com/watch?v=0TB8Hk7XcY8

In order to meet our customers demand, we have different series of MOTOR RUN CAPACITORS. Round shape, box shape, aluminum case or plastic case, all you can choose.
We offer this series for a long time. Our stable quality and competitive price make us more popular in the market.
If you are looking for MOTOR RUN capacitors, please feel free to send your inquiry to us.

JFS - Motor Capacitor
Features:
Electrical apparatus use metallized film with precisely quality control.
Low D.F. (dissipation factor), lower temperature rise.
High I.R. (insulation resistance) small size.
High safety &high reliability.
Durability and characteristics of frequency, etc.

Do you still remember our JYM series which we introduced to you in while ago?

JYM is Multilayer (mono) Axial & Radial Ceramic Capacitors, his provide Miniature size, wide capacitance, tape and reel packaging available for auto-placement.

Wide range of applications: Such as microwave ovens in home appliances, induction cookers, air conditioner controllers, energy-saving lamp ballasts, chargers, currency counters, paper shredders, building video intercom systems, audio equipment...etc.

New series coming up with very nice price! we support few weeks. lead time and reasonable price, welcome to contact us.

A 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.