jbcapacitors blog

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

jb Capacitors manufactures Motor Starting Capacitor, also called Motor Run Capacitors. Motor Starting Capacitor is famous for low dissipation factor, lower temperature rise and high reliability and durability. We sell high quality and quite competitive prices for Motor Starting Capacitors, and totally we have 22 different series of motor starting capacitors. Following are Motor Starting Capacitor features. 

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

CBB60 Capacitor takes heavy-edge metallized Al/Zn PP film or web-like fuse film as dielectric. Its components are sealed with flame-retardant epoxy resin. It has cylindric outline with high reliability and stability. CBB60 capacitor has features of small size, light weight, small tangent in waste angle, and good self-concrescence. Applicable to startand operation with 50/60Hz. A. C single motor, specially suit for micro pump, baric pump, micro motor and so on.

1) Very small dissipation factor, small inheterent temperature rise.
2) High insulation resistance.
3) Good capacitance stability.
4) Excellent self-healigh property.
5) Safety and hight reliability due to flame reatardant plastic or metal case enclosure, flame retardant opoxy resin endfill.
6) It is applicable for the starting and running of AC single-way motor with 50~60Hz frequency.
7) Special requirment can be made at the request of customers.

According to the provisions of China’s national standard GB2470-81, the capacitor named product 
model generally consists of the following four parts:

Part I: The letter represents the name, the meaning of C is a capacitor.
Part II: with letters material.
Part III: numerical classification.
Part IV: The digital serial number.

For example: “CBB60” Capacitor
C – meaning Capacitor
B – meaning the Dielectric is a non-polar organic film
B – meaning the Dielectric material is polypropylene
60 – meaning Plastic can motor run capacitor Broadly applied to starting and running of  AC single-
phase motors at 50/60Hz frequency for AC motor, electric engine, water pump, generator and high 
efficiency compressors of refrigerators etc.

Specification of CBB60 Capacitor : jb JFS-17 

Feature and use : CBB60 Capacitors offer self-healing Metallized Polypropylene Film dielectric system, outstanding electrical characteristics, high capacitance stability over time and temperature, and very low internal power losses (Dissipation Factor). The CBB60 series is ideal for start and run applications in single-phase asynchronous motors and general A.C. applications at industrial frequencies.

Applications : jb Capacitors Company CBB60 can be widely used as the start-up and running capacitor that is special for micro water pump, cleaning machine, washing machine, and single-phase water pump motor, etc.