jbcapacitors blog

Popular jb Capacitors Product Series

Below are the most popular and strongest series from jb Capacitors:

• JFP – Metallized Polypropylene Film Capacitors (Equivalent to CBB-81)
• JFG – Axial (Leaded) Film Capacitors (Equivalent to CL20)
• JFA – Mylar Polyester Film Capacitors (Equivalent to CL11)
• JFB – Metallized Polyester Film Capacitors (Equivalent to K73-17)
• JFV – X2 Metallized Polypropylene Film Capacitors (X2 Capacitors)

These series are widely used in various applications and known for their high performance and reliability.

Dear Customers,  

let me share with you, In 2012, our production volume increased a lot, like JFV X2 series sales increased by 102%.  JFB MKT Film capacitors(CL21) sales increased by 87%.

Due to our high quality and good prices, we win many good projects, like Philip lighting and Bosch white goods projects. 

We also look forward to starting business with your company. Kindly send your MKT ,MKP film capacitors demands to me quote, OK ?

jb top sellers:

1) JFB--Dipped Type Metallized Polyester Film Capacitor (CL-21, K73-17)
Cross guide: Vishay MKT468, Epcos B32591~32594, Panasonic ECQE, ECQV, Pilkor PCMT 369　

2) JFV--X2 Metallized Polypropylene Film Capacitor (ENEC, VDE, UL approvals)
Cross guide: Kemet R46, Vishay MKP3362, Epcos B81130, Panasonic ECQU, Pilkor PCX2 337, Evox Rifa PHE840M

Our JFS Motor Start/Run Capacitors sell very good on EU and CIS markets due to our high quality, low prices and very good package.

Many customers buy one list from us with different values from 1uF to 100uF / 250VAC, 450VAC. 
We produce total 18 types, and below 4 types: JFS-A, JFS-6, JFS17, JFS-13 are the most popular types. 

JFS - Motor Starting Capacitor Features:
Electrical apparatue use metalized 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.

A dual run capacitor supports 2 electric motors, such as in large air conditioner or heat pump units, with both a fan motor and a compressor motor. The dual capacitor has 3 terminals labeled "C", "FAN", and "HERM" for the common, fan, and hermetic compressor connections.

Round dual run capacitors (shaped as round cylinders) are commonly used for air conditioning, to help in the starting of the compressor and the condenser fan motor. Dual capacitors come in a variety of sizes, depending on the capacitance (µF), such as 40 plus 5 µF, and also the voltage. A 440 volt capacitor can be used in place of a 370 volt, but not a 370 in place of a 440 volt. The capacitance must stay the same within 5% of its original value. An oval dual run capacitor could be used instead of a round capacitor, but the mounting strap should be changed to better fit the oval shape.

http://www.jbcapacitors.com/Plastic-Film-Capacitors/JFS-Motor-Capacitor.html

IEC/EN 60252-1 2001 specifies levels of protection for motor run capacitors
• P0 - no protection
• P1 - fail open circuit or short circuit
• P2 - fail open circuit only 

Start capacitors above 20 microfarads (µF) are always non-polarized Aluminum Electrolyic Capacitors with non solid electrolyte and therefore they are only applicable for the short motor starting time.

Start capacitors briefly increase motor starting torque and allow a motor to be cycled on and off rapidly. Start capacitors have ratings above 70 microfarads (µF), with four major voltage classifications: 125 V, 165V, 250 V, and 330 V. A start capacitor stays in the circuit long enough to rapidly bring the motor to 3/4 of full speed and is then taken out of the circuit, such as by a centrifugal switch that releases at that speed. The motor after that runs more efficiently with a run capacitor.

http://www.jbcapacitors.com/Plastic-Film-Capacitors/JFS-Motor-Capacitor.html

Run capacitors are mostly polypropylene film capacitors and are designed for continuous duty, and they are energized the entire time the motor is running. Run capacitors are rated in a range of 1.5–100 microfarads (µF or mfd), with voltage classifications of 370 V or 440V.

Single phase electric motors need a capacitor to energize a second-phase winding. If the wrong run capacitor is installed, the motor will not have an even magnetic field, and this will cause the rotor to hesitate at those spots that are uneven. This hesitation can cause the motor to become noisy, increase energy consumption, cause performance to drop, and cause the motor to overheat.

http://www.jbcapacitors.com/Plastic-Film-Capacitors/JFS-Motor-Starting-Capacitor.html

jb A.C motor-start capacitors are electrochemical devices consisting of compactly wound aluminum foil separated by layers of paper, which are impregnated with a conducting electrolyte. Etching of the foil prior to formation and winding increases both the effective foil surface area and the capacitance per unit volume of the finished capacitor. The entire assembly is housed in a case of moisture and oil resistant molded plastic. These capacitors are rated for operation in ambient temperatures from -40°C to +65°C and at a frequency of 50Hz to 60Hz.

These capacitors are designed for motor starting and other intermittent duty AC applications. They are non-polarized and are normally designed with dual quick terminals. These terminals allow for the easy attachment of a bleeder resistor(usually 15K ohm at 2 watt). This saves relay switch contacts and capacitor, particularly in capacitor start-run applications. The quick connect terminals also eliminate the need for soldering.

A motor capacitor, such as a start capacitor or run capacitor, including a dual run capacitor, is an electrical capacitor that alters the current to one or more windings of a single phase AC induction motor to create a rotating magnetic field. It is used in air conditioners, hot tub/jacuzzi spa pumps, or forced air heat furnaces for example. A round dual run capacitor is used in some air conditioner compressor units, to boost both the fan and compressor motors.

http://www.jbcapacitors.com/Plastic-Film-Capacitors/JFS-Motor-Capacitor.html

I: CBB60A Capacitor Plastic can Quickly connect 4 pins terminal, M8 Stud

II: CBB60B Capacitor flexible /solid wire plastic can, M8 Stud

III: CBB60C Capacitor Bipolar Cable Plastic can, M8 stud