jbcapacitors blog

• JFA--Mylar polyester film capacitors
• JFB--Metallized polyester film capacitors
• JFL--Metallized polypropylene film capacitors
• JFG--Axial lead film capacitor
• JFV--X2 metallized polypropylene film capacitors
• JFR--Radial & Axial Polystyrene film capacitors
• JFP--High voltage metallized polypropylene cap.
• JFQ--Double sided metallized polypropylene cap.
• JFS--Motor starting film capacitors
• JFX--Premium metallized polypropylene Cap.
• JCS--85°C SMD electrolytic capacitor
• JCK--105°C SMD electrolytic capacitor

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Jun, 1980, founded in Tainan, Taiwan to produce Plastic Film Capacitors.
Feb, 1982, started to produce Snap-in, Screw & Lug type Aluminum Electrolytic Capacitors.
Dec, 1984, established sales office and warehouse in Hong Kong Located in N.T., HK
July, 1987, moved to China and built up joint venture in Hefei, Anhui Province, China.
Dec, 1988, started production of Snap-in, Screw & Lug Aluminum Electrolytic Capacitors in China.
Dec, 1988, started production of Snap-in, Screw & Lug Aluminum Electrolytic Capacitors in China.
Aug, 1993, jb Capacitors became sole proprietorship enterprise in China.
Jun, 2003, jb Capacitors set up sales office in Dongguan, Guangdong Province, China.
March, 2005, started to produce SMD Aluminum Capacitors.

Aluminum is used for the electrodes by using a thin oxidization membrane. Large values of capacitance can be obtained in comparison with the size of the capacitor, because the dielectric used is very thin. The most important characteristic of electrolytic capacitors is that they have polarity. They have a positive and a negative electrode.[Polarised] This means that it is very important which way round they are connected. If the capacitor is subjected to voltage exceeding its working voltage, or if it is connected with incorrect polarity, it may burst. It is extremely dangerous, because it can quite literally explode. Make absolutely no mistakes.

Generally, in the circuit diagram, the positive side is indicated by a "+" (plus) symbol.

Electrolytic capacitors range in value from about 1µF to thousands of µF. mainly this type of capacitor is used as a ripple filter in a power supply circuit, or as a filter to bypass low frequency signals, etc. Because this type of capacitor is comparatively similar to the nature of a coil in construction, it isn't possible to use for high-frequency circuits. (It is said that the frequency characteristic is bad.)

Description :

1. High frequency operation.
2. High du / dt.
3. High insulation resistance.
4. Flame retardant epoxy resin (UL 94V-0).

Specification :

1. Operating temperature: -40℃~+100℃.
2. Capacitance range: 0.0022μF~1μF.
3. Capacitance tolerance: ±10% (K).
4. Rated voltage: 300V, 280V, 275V. 250V.AC
5. Dissipation factor: 0.08% max at 1KHz 20℃ 0.3% max at 10KHz 20℃.
6. Insulation resistance: 1.R≥30,000MΩ (C≤0.33μF) 1.R≥10,000MΩ (C>0.33μF)