Radial Leaded Capacitor 
Radial lead capacitor has two leads that protrude from the bottom of the capacitor. In this sense, they are different from the configuration of axial capacitors, which have one lead at each end.
We offer different types of radial leaded capacitors customized ranging from 1000uf25v to 4700uf35v, customizing radial electrolytic capacitors to your requirements for all your applications.
Radial leaded electrolytic capacitors are high volume, small size, high reliability, long life, high reliability, stable capacity, good resistance to high temperature and humidity, etc.
Radial lead type aluminum electrolytic capacitors are widely used in electronic precision instruments. Various small electronic devices for resonance, coupling, filtering, bypass.
Radial electrolytic capacitors are polarized, so it is important for them to have the polarity soldered correctly. If not, they will exhaust (bulge at the top) after a few minutes of operation.
The positive and negative electrolytic capacitors are distinguished: the black block with the logo on top of the capacitor is the negative pole, there are two semicircles on the capacitor position on the PCB, the color painted semicircle corresponding to the pin is the negative pole, also the length of the pin is useful to distinguish the positive and negative polarity.
1、Bolt type electrolytic capacitor positive and negative identification. Bolt type aluminum electrolytic capacitors have clear positive and negative identification on the casing, positive pole is marked with "+" and negative pole is marked with "-". Most of the bolt type capacitors have "+" and "-" marks engraved next to the terminals on the cover.
2、Differentiation of positive and negative electrodes of solder lug aluminum electrolytic capacitors. Solder lug aluminum electrolytic capacitors are also called bullhorn capacitors, currently all manufacturers choose "negative pole marking", that is, the solder pin corresponding to the casing "-" mark is the negative pole. Most of them adopt "embossing" to identify the negative pole, and some electrolytic capacitor manufacturers directly print "+" and "-" on the rivet. logo.
3、Lead structure electrolytic capacitor positive and negative identification method. The lead structure electrolytic capacitor also adopts "negative pole identification", that is, the lead corresponding to the "-" mark of the casing is negative pole. There is also the identification by the length of the lead, the long lead is the positive pole, the short lead is the negative pole.
If you want to know more about electrolytic capacitors, please contact us.
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Electrolytic capacitor 68UF450V
SHDR® Application Notes
Caution DuringCircuitDesign
1. Please make sure the application and mounting Conditiorts to which the capacitor will be exposed are within the conditions specified in the catalog or alternate product specification (Referred as to
2. Design Aluminum Electrolytic Capacitors, please pay attentiontothe points listed below.
(1). The capacitor shall not be used in en ambient temperature which exceeds the operating temperature pacified in the specification.
(2). Do not apply excessive current which exceeds the allowableripple current .
(3). Make sure that no excess voltage (that is higher than the rated voltage)is applied to the capacitor.
(a). Please pay attention so that the peak voltage, which is DC voltage overlapped by ripple current,will not exceed the rated voltage.
(b). In the case where more than 2 aluminum electrolytic capacitors are used in series please make sure that applied voltage will be lowor than rated Volrage and the voltage
be will applied to each capacitor equally using a balancing resistor in parallel with the capadtors.
(4). Aluminum electroiytic capacitors are poiartzed. Make surethatno reversevoltage or AC voltage is applied to the capacitors. Please use Bi-polar capacitors for a circuit that can possibly see reversed polarity. Even Bi-polar capedtorcan not be USed for ac voltage application.
3. Appropriate capacitors which comply with the life requirement of the products should be selected when designing the circuit.
4. For a drcuit that repeats rapid charging discharging of electricity, an appropriate capacitor that is capable ofenduringsuch a condition must be used.
5. Aluminum case, cathode lead wire, anode lead wire and circuit pattern must be isolatad.
6. The sleeve of cepacitoreisnot recognized as an insulator, and therefore, the standard capacitor should not be uesd in a place where insulation function is needed. Please consult with us should you require a higher grade of insulating sleeve.
7. Capadtors may fail if they are used under the following conditions.
(1). Damp conditions such as water, saltwater spray, or oil spray or fumes. High humidity or humidity condensebon sttuations.
(2). In an atmosphere filled with toxic gasses (such as hydrogen sulfide, sulfurous acid, nitrous acid, chlorine. ammonia, etc. )
(3). Being exposed to direct sunlight, ozone, ultraviolet ray, or radiation.
(4). Being exposed to acidic or alkaline solutions
(5). Under severe conditions where vibration and/or mechanical shock exceed the applicable ranges of the specification.
8. In designing a circuit, the following matters should be ensured in advancetothe capacitor assemblyon the P.C. board.
(1). Design the appropriate hole spacing to match the lead pitch ofcapacitors
(2). Do not locate any wiring and clrcuit patterns dirsctly above the capacitor vent, Ensure enough free space above the capacitor vent.
(3). Do not design a circuit board so that heat generating components are placed near an aluminum electrolvtic capacitor Or reverse side of P.C. board (under the capacitor).
9. Electrical characteristics may vary depending on changes in temperature and frequency. Please consider this variation when you design drcuits.
10. When you mount capacitorson the double-sided P.C boards, do not place capecttors on circuit patterns oroveron unused holes.
11. When you install more than 2 capacitors in parallel, considerthe balance of current flowing through the capacitors.
12. If more than 2 aluminum electrolytic capacitors are used in seriesmake sure the applied voltage will be lower than the rated voltage and that voltage will be applied to each capacitor equally using balancing resistor in parallel witt each capacitor.
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