jbcapacitors blog

◆Voltage is a measure of the energy carried by the charge. Strictly: voltage is the "energy per unit charge".
◆The proper name for voltage is potential difference or p.d. for short, but this term is rarely used in electronics.
◆Voltage is supplied by the battery (or power supply).
◆Voltage is used up in components, but not in wires.
◆We say voltage across a component.
◆Voltage is measured in volts, V.
◆Voltage is measured with a voltmeter, connected in parallel.
◆The symbol V is used for voltage in equations.

Lamp(lighting)		A transducer which converts electrical energy to light. This symbol is used for a lamp providing illumination, for example a car headlamp or torch bulb.
Lamp (indicator)		A transducer which converts electrical energy to light. This symbol is used for a lamp which is an indicator, for example a warning light on a car dashboard.
Heater		A transducer which converts electrical energy to heat.
Motor		A transducer which converts electrical energy to kinetic energy (motion).
Bell		A transducer which converts electrical energy to sound.
Buzzer		A transducer which converts electrical energy to sound.
Inductor (Coil, Solenoid)		A coil of wire which creates a magnetic field when current passes through it. It may have an iron core inside the coil. It can be used as a transducer converting electrical energy to mechanical energy by pulling on something.

For more products information please check: http://www.jbcapacitors.com/

It might seem a good idea to make the farad (F) much smaller to avoid having to use µF, nF and pF, but if we did this most of the equations in electronics would have to have factors of 1000000 or more included as well as the quantities. Overall it is much better to have the units with their present sizes which are defined logically from the equations.

In fact if you use an equation frequently you can use special sets of prefixed units which are more convenient...

For example: Ohm's Law, V = I × R
the standard units are volt (V), amp (A) and ohm (Ω),
but you could use volt (V), milliamp (mA) and kilo-ohm (kΩ) if you prefer.
Take care though, you must never mix sets of units: using V, A and kΩ in Ohm's Law would give you wrong values.

The unit (and unit symbol) which is used to measure each quantity. For example: Charge is measured in coulombs and the symbol for a coulomb is C.

Some of the units have a convenient size for electronics, but most are either too large or too small to be used directly so they are used with the prefixes shown in the second table. The prefixes make the unit larger or smaller by the value shown.

Some examples:
25 mA = 25 × 10-3× 0.001 A = 0.025 A
47µF = 47 × 10-6× 0.000 001 F = 0.000 047 F
270kΩ = 270 × 103 Ω= 270 × 1000 Ω= 270 000 Ω F = 47 A = 25

The table shows electrical quantities which are used in electronics.

The relationship between quantities can be written using words or symbols (letters), but symbols are normally used because they are much shorter; for example V is used for voltage, I for current and R for resistance:

As a word equation:

voltage = current×resistance

The same equation using symbols: V=I×R

To prevent confusion we normally use the same symbol (letter) for each quantity and these symbols.

Please click on the quantities in the table for further information.

Electrolytic capacitors are now being used increasingly in SMD designs. Their very high levels of capacitance combined with their low cost make them particularly useful in many areas.

Often SMD electrolytic capacitors are marked with the value and working voltage. There are two basic methods used. One is to include their value in microfarads (m F), and another is to use a code. Using the first method a marking of 33 6V would indicate a 33 mF capacitor with a working voltage of 6 volts. An alternative code system employs a letter followed by three figures. The letter indicates the working voltage as defined in the table below and the three figures indicate the capacitance on picofarads. As with many other marking systems the first two figures give the significant figures and the third, the multiplier. In this case a marking of G106 would indicate a working voltage of 4 volts and a capacitance of 10 times 10^6 picofarads. This works out to be 10 mF.

jbcapacitorsis thespecialty manufacturer of the SMD Electrolytic capacitor.Ourjb capacitorshave JCS - 2000H at 85°C SMD Aluminum Electrolytic Capacitor and JCK - 1000H at 105°C SMD Aluminum Electrolytic Capacitor.

JCK

JCS

An electronic component is a basic electronic element usually packaged in a discrete form with two or more connecting leads or metallic pads. Components are intended to be connected together, usually by soldering to a printed circuit board, to create an electronic circuit with a particular function (for example an amplifier, radio receiver, or oscillator). Components may be packaged singly (resistor, capacitor, transistor, diode etc.) or in more or less complex groups as integrated circuits (operational amplifier, resistor array, logic gate etc.)

On Nov 9th~12th,2010, jb Capacitors Company exhibit at Electronica 2010 in Munich, Germany.
Booth No. is B6.437/10.

Below you can see our green booth photos. Our booth are very popular, many customers visited our booth with great pleasure.
Our exhibition are very successful.

On the show, we exhibit below, also welcome to contact our sales if you are interested in our leafletes, sample kits, and green bags, and samples.

1. jb Capacitors green leaflets
2. jb Capacitors green sample kits
3. jb Capacitors green bags
4. jb Capacitors samples: including below different series of samples:

JFB - Metallized Polyester Film Capacitor
0.1uF 250V +/-10% P:10mm Bulk RoHS 
0.047uF 400V +/-10% P:10mm Bulk RoHS 
0.47uF 250V +/-10% P:15mm Bulk RoHS

JFD - Box Type Metallized Polyester Film Capacitor
0.1uF 250V +/-10% P:15mm Bulk RoHS

JFJ - Mini Box Stacked Metallized Polyester Film Capacitor
0.047uF/63V +/-5% P:5mm Bulk RoHS 
0.15uF 100V +/-5% P: 5mm Bulk RoHS
0.22uF 63V +/-5% P:5mm Bulk RoHS
0.1uF 100V +/-5% P:5mm 7.2*6.5*2.5mm Bulk RoHS

JFL - Metallized Polypropylene Film Capacitor
0.33uF 100V +/-10% P:15mm Bulk RoHS

Axial Metallized Polyester & Polypropylene Film Capacitor 
JFGA 0.22uF 100V +/-10% 15*7MM Bulk RoHS
JFGA 0.33uF 630VDC +/-10% Bulk RoHS

JFX - Premium Met Polypropylene Film Capacitors – Axial
4.7uF 250V +/-5% Bulk RoHS

JFN - X2 Metallized Polypropylene Film Capacitor 
0.1uF 275VAC +/-10% P:15mm Bulk RoHS
0.15uF 275VAC +/-10% P:15mm Bulk RoHS 
0.22uF 275VAC +/-10% P:15mm Bulk RoHS
0.1uF 275VAC +/-10% P:10mm Bulk RoHS 
0.33uF 275VAC +/-10% P:15mm Bulk RoHS 
0.47uF 275VAC +/-10% P:22.5mm Bulk RoHS 
0.068uF 275VAC +/-10% P:10mm Bulk RoHS

JFO - X2 Metallized Polypropylene Film Capacitor
0.047uF 275VAC +/-10% P:10mm Bulk RoHS
0.1uF 275VAC +/-10% P:10mm Bulk RoHS
0.33uF 275VAC +/-10% P:15mm Bulk RoHS
0.47uF 275VAC +/-10% P:15mm Bulk RoHS

JFP - High Voltage Met Polypropylene Film Capacitor
470pF 2000V +/-10% P:15mm Bulk RoHS

JCS--SMD - Aluminum Electrolytic Capacitors
10uF 50V +/-20% 6.3x5.4mm 2000h at 85°C
22uF 16V +/-20% Size:4*5.4mm 2000h at 85°C

JNE--Snap in Aluminum Electrolytic Capacitors
470uF 200V +/-20% 2000h 25x30mm P:10mm 2000h at 105°C Bulk RoHS

JMJ--Screw terminals Aluminum Electrolytic Capacitors
22000uF 63V +/-20% Size: 51x80mm 2000h at 85°C Bulk RoHS

The table below gives and overview of the main characteristics of the various types of capacitor.

Welcome to visit our jb capacitors website http://www.jbcapacitors.com/ to search your interestedcapacitors.

It is necessary to quantify a capacitor in terms of its ability to store charge. The basic unit of capacitance is the Farad, named after Michael Faraday.

The definition of A Farad is: A capacitor has a capacitance of one Farad when a potential difference of one volt will charge it with one coulomb of electricity (i.e. one Amp for one second).

In view of the fact that a capacitor with a capacitance of one Farad is too large for most electronics applications, components with much smaller values of capacitance are normally used. Three prefixes (multipliers) are used, µ (micro), n (nano) and p (pico):