jb Tell You Some Aluminum Electrolytic Capacitors' Features and Application

Aluminum electrolytic capacitors have always been a popular choice for power supply, due to its low cost. However, their life have limited , and easy to influenced by extreme conditions ,main problem is high temperature and low temperature. Aluminum Electrolytic capacitors is made by aluminum foil and electrolyte. This electrolyte will evaporate during the life of the capacitor, it will change its electrical properties step by step. If the capacitor fails, it will be violent reactions: release flammable, corrosive gases.

The electrolyte evaporation's speed all depend on capacitor temperature. Operating temperature dropped 10 degrees, the capacitor's life will be doubled. Usually, the capacitors' life usually means under maximum rated temperature. The typical rated life is 1000 hours at 105 degrees Celsius. In the application of LED which requirement life time 25000hours, the aluminum electrolytic capacitor will have problem. Cause if want to reach to 25000hours, the working temperature should not more than 65°C. But LED working temperature can reach to 125°C at most. Though some famous manufacturer declare their can reach. but aluminum electrolytic capacitors still is limited LED Lamp's life.

How to solve this problem? First, you may be chose to increase the rated voltage of the capacitor, to reduce the probability of electrolyte failure. However, the way will make the capacitor equivalent series resistance (ESR) more higher than before. Since the capacitor will generally have a high ripple current stress, so this high internal resistance will bring additional power consumption and increase the capacitor temperature. Failure rate will increases by increasing temperature. When the capacitor temperature is low, ESR increased dramatically. In this case,-40°C, the resistance increases by orders of magnitude. This will affect the power performance in many ways. If the capacitor is used for output of a switching power supply, the output ripple voltage was increased by orders of magnitude. Further, in the above zero frequency and the output capacitor ESR is formed, which allows an order of magnitude increase in the loop gain, which affects the control loop. This produces a stable oscillation power. In order to meet this strong vibration, the control loop will usually make a huge compromise in terms of space and operate at higher temperatures.

In short, the aluminum electrolytic capacitor is typically the lowest cost option. However, you will need to determine whether the application of its shortcomings adversely affected. Through its operating temperature you need to consider their longevity. meanwhile, you should appropriately reduce the rated voltage, so that you can achieve the lowest temperatures, and thus get the longest life. Finally, you need to understand the ESR range must be used so that you can properly design the control loop, to meet the ripple specifications.

 

jb Capacitors Show You JYA Y1 CD 400VAC Safety Standard Recognized Capacitors

Class Y capacitor is divided into Y1 capacitors and Y2 capacitors, Y1 is a double insulated Y capacitor, used to cross the one or two side of the.Y2 is a basic single insulation Y capacitor, used to cross the primary side of the earth to protect the FG line. An adjustable capacitor is used for such occasions, which is, after the capacitor failure, will not cause electric shock, and does not endanger personal safety.

JYA Y1 CD safety standard recognized capacitors, used in line to ground applications—the capacitor placed between line and ground, have voltages from 400VAC. Major features of these non-polar capacitors include capacitance range generally from 10pF to 10000pF; from 7.5mm to10mm lead spacing, high reliability, and kinked or straight lead configurations.

In general, the Y class safety-certified should be connected to a wire with large noise interference. You can use Class Y Safety Standard Capacitors in line disturbances suppression, motors, motor controls, relays, switching power supplies, Inverters with compact size, cost effective product, and safety standards recognized.
Learn more about the Ceramic Capacitors please chick the link:http://www.jbcapacitors.com/Ceramic-Capacitors.html

jb Extend Product Range for Axial Aluminum Electrolytic Capacitors

Good news! Jb capacitors company extend production again. Below Axial aluminum electrolytic capacitors are available for you.
Pls. check our datasheet from our website, collect your RFQs and send to us for quote.

JAH - 1000H at 105°C, Axial Aluminum Electrolytic Capacitor Features
Load life of 1000 hours at 105°C
Low Voltage
2 Rubber Types
For general purpose application
RoHS Directive Compliant

jb 2000H at 105°C Lower ESR Radial Polymer Aluminum Solid Electrolytic Capacitors-PSR Series

jb's PSR series conductive polymer aluminum solid electrolytic capacitor has the advantages such as wide operation temperature range, compact, low ESR(equivalent series resistance), excellent noise reduction and high resistance against ripple current. Using a capacitor with low ESR is preferable for industrial and commercial applications, both to improve power efficiency and to increase safety in cases of overload and overheating.

PSR - 2000H at 105°C Low ESR Radial Polymer Aluminum Solid Electrolytic Capacitors Specifications:
Operating Temperature:-55°C~ +105°C
Voltage Range:6.3V ~16V.DC
Capacitance Range:180 ~ 1500μF
Capacitance Tolerance:±20% at 120Hz, 20°C
Leakage Current(+20℃, max):≤0.2CV (μA, after 2 minutes)

The PSR series is ideally suited for LED driver power supplies, adapters, laptop power supplies and medical equipment.

Learn more about jb PSR Conductive Polymer Aluminum Solid Electrolytic Capacitors:
http://www.jbcapacitors.com/Polymer-Aluminum-Solid-Electrolytic-Capacitors/PSR-2000H-at-105C-Low-ESR-Radial-Polymer-Aluminum-Solid-Electrolytic-Capacitors.html

jb Standard Radial Leaded Conductive Polymer Aluminum Solid Electrolytic Capacitors-PSS series, 105°C

jb's PSS series is an aluminum solid capacitor with high conductive polymer. This series acquires low equivalent series resistance (ESR), high ripple current, excellent noise reduction capability and frequency characteristics, compliant to the RoHS directive. In addition, jb's PSS series has a long life span and its ESR has little change even at low temperatures since the electrolyte is solid.

PSS - 2000H at 105°C Standard Radial Polymer Aluminum Solid Electrolytic Capacitors Specifications:
Operating Temperature:-55°C~ +105°C
Voltage Range:2.5V ~25V.DC
Capacitance Range:82 ~ 1500μF
Capacitance Tolerance:±20% at 120Hz, 20°C
Leakage Current(+20℃, max):≤0.2CV (μA, after 2 minutes)
Applicable to DC/DC converters and AC/DC converters, communication power supply, set-top boxes, router, TV, voltage regulator, mobile phone charger, computer motherboard, graphics card, power supplies, CPU’s, Decoupling circuits and LED driver power supplies.

Learn more about jb PSS Conductive Polymer Aluminum Solid Electrolytic Capacitors: http://www.jbcapacitors.com/Polymer-Aluminum-Solid-Electrolytic-Capacitors/PSS-2000H-at-105C-Standard-Radial-Polymer-Aluminum-Solid-Electrolytic-Capacitors.html

 

jb Capacitors Company X2 Safety Capacitor Stock Notice

jb capacitors produce MKT, MKP, X2 safety metallized polypropylene capacitors since 1980.

We are going to stock some X2 capacitors, and provide better delivery support to you. Do you have interest ?

Could you please send us the X2 capacitors requirements ? Then we will keep stock for you. You are welcome to request samples and quotation from us too.

Datasheet link : http://www.jbcapacitors.com/pdf/JFO-X2-Metallized-Polypropylene-Film-Capacitor-(4-approvals).pdf

I need below information, please help reply me:

  • 1) Description or Part number of X2 film capacitors (can give Arcotronics, Epcos, Panasonic....X2 capacitors part number)
  • 2) Quantity per shipment, per month or per year.
  • 3) Order frequency