BP Axial Non polar Aluminum Electrolytic Capacitors are made with an aluminum cylinder as the negative electrode, filled with a liquid electrolyte, and a bent aluminum strip inserted as the positive electrode. 

BP Axial Non polar Aluminum Electrolytic Capacitors have a wide range of applications. In addition to the audio and signal processing fields, they can also be used in power electronics and industrial control, new energy and automotive electronics, and general circuit design. However, few people know about the service life of BP aluminum electrolytic capacitors.

First, it is important to confirm that aluminum electrolytic capacitors(Bipolar Electrolytic for speaker) will definitely fail, it is just a matter of time. There are many factors affecting the lifespan of capacitors(Bipolar Electrolytic Capacitors for Crossovers), including high temperature, overvoltage, reverse voltage, rapid charge and discharge, and so on.

Under normal use, the greatest influence is temperature—the higher the temperature, the faster the electrolyte volatilizes. It should be noted that the "temperature" here refers to the operating temperature of the aluminum foil, not the ambient or surface temperature. Manufacturers typically mark the capacitor's lifespan and test temperature on the capacitor body. 

Since the lifespan of a non-polarized Bipolar Aluminum Electrolytic Capacitors is halved for every 10°C increase in operating temperature, do not assume that an aluminum electrolytic capacitor with a 2,000-hour lifespan is better than one with a 1,000-hour lifespan; pay attention to confirming the test temperature for the lifespan. Each manufacturer has a calculation formula for temperature and lifespan, which should be referenced with actual data during capacitor design.

Life Expectancy Estimation: The continuous operating time of an electrolytic capacitor at its maximum operating temperature.Lx=Lo*2(to-ta)/10

Lx = Actual operating lifespan

Lo= Guaranteed lifespan

to= Maximum operating temperature (85°C / 105°C)

ta= Actual ambient temperature around the capacitor

Example: Specification: 105°C / 1,000 hours

Lifespan estimation at 65°C:Lx=1000*210(105−65)/10=8000 hrs

Actual operating lifespan: 8,000 hrs

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WEET BP Axial Non polar Aluminum Electrolytic Capacitors are non-polar capacitors(Bipolar Electrolytic Capacitors for Crossovers) that can store both positive and negative charges. They are constructed with two electrode plates, an electrolytic dielectric, and an electrolyte solution.

WEET explain its working principle:

• Charge Storage and Release: During the positive and negative half-cycles of an audio signal, the Bipolar Electrolytic for speaker stores and releases charges through charging and discharging processes. This smooths and stabilizes voltage fluctuations in the audio signal, helping speakers better reproduce audio signals accurately.

• Filtering and Coupling: Used for filtering and coupling in audio circuits. In crossover networks, by combining different BP Axial Non polar Aluminum Electrolytic Capacitors values, audio signals are separated according to different frequency ranges and transmitted to tweeter, midrange, and woofer units respectively, enabling clear reproduction of sounds in each frequency band. Meanwhile, they also isolate direct current (DC) components and transmit alternating current (AC) audio signals.

WEET Application Scenarios:

• Loudspeaker Systems: Primarily used in the crossover networks of loudspeakers, they are key components for separating and distributing sound signals of different frequencies. They effectively enhance the sound quality of loudspeaker systems, making the sound clearer, fuller, and more layered.

• Audio Amplifiers: In audio amplifier circuits, the are used for coupling and filtering to stabilize the amplifier's operating point, improve its performance, reduce audio signal distortion, and ensure higher quality of amplified audio signals.

• Automotive Audio Systems: Due to their excellent performance and wide temperature adaptability, they are widely used in automotive audio systems. They provide stable audio signal processing for in-vehicle speakers, Bipolar Electrolytic for speaker meeting the audio playback needs of vehicles under different driving conditions.

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Aluminum electrolytic capacitors are widely used, but how much do you know about them? Aluminum point capacitor is a medium made of an aluminum cylinder as the negative electrode, containing liquid electrolyte, and a bent aluminum strip inserted as the positive electrode. It also needs to undergo direct current voltage treatment to form an oxide film on the positive electrode as a dielectric. Its characteristics are large capacity, but high leakage, poor stability, positive and negative polarity, suitable for power filtering or low-frequency circuits. When using, do not connect the positive and negative poles in reverse.

WEET How to choose a suitable NP aluminum electrolytic capacitors?

• Rated voltage:

  The non-polarized Bipolar Aluminum Electrolytic Capacitors and withstand voltage parameters marked on the NP Aluminum Electrolytic Capacitors body are very important and are the most basic content for selecting capacitors;

• External dimensions:

  The external dimensions are related to weight and pin type. Generally speaking, non-polarized Bipolar Aluminum Electrolytic Capacitors with the same diameter and capacity can be replaced with capacitors with higher heights for capacitors with lower heights;

• Dielectric loss:

  The energy consumed by a NP Aluminum Electrolytic Capacitors under the action of an electric field is usually represented by the ratio of the loss power to the reactive power of the capacitor, that is, the tangent of the loss angle;

WEET Five things to consider when installing aluminum electrolytic capacitors:

1. NP Aluminum electrolytic capacitors are not insulated between the aluminum casing and the cathode lead wire. Please note;

2. Do not apply force to the leads of NP aluminum electrolytic capacitors, otherwise it may cause the leads to break at the welding point with the aluminum stem,

   resulting in open circuits, short circuits, high leakage currents, and other phenomena;

3. When installing and welding NP aluminum electrolytic capacitors, the temperature should not exceed 260 ℃,

   and the welding time is best controlled within 4 seconds;

4. When inserting NP aluminum electrolytic capacitors into PCB boards, the hole spacing should match the distance between the capacitor leads.

   Too large or too small can easily cause leakage or high leakage current, ultimately leading to shortened lifespan or open circuit state;

5. When using non-polarized Bipolar Aluminum Electrolytic Capacitors with explosion-proof valves,

   the explosion-proof valve should be kept at least 3mm away from other mechanisms to ensure that the explosion-proof valve can operate normally.

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1. Leakage: After the seal of the electrolytic capacitor is damaged, the electrolyte leaks out,
   causing corrosion of surrounding components or short circuits.
2. Appearance deformation and expansion: If the shell of an non-polarized Bipolar Aluminum Electrolytic Capacitors deforms,
   expands, or bulges, it is usually due to internal gas production (such as electrolytic decomposition) causing the shell to deform,
   and in extreme cases, it may burst.   
3. Abnormal sound: If the non-polarized Bipolar Aluminum Electrolytic Capacitors emits abnormal "crackling", "
   popping" discharge sound or "buzzing" dull sound during operation, it indicates that there must be a fault inside the capacitor,
   and it should be stopped immediately for further inspection and treatment or replaced with a new one.
4. Switch tripping or fuse blowing: If the NP Aluminum Electrolytic Capacitors bank switch experiences an accident tripping or
   high-voltage drop and the fuse is blown, it should be shut down and the capacitor can only be put back into operation after
   confirming that there is no fault.

• Measure capacitance value: Use a multimeter or capacitance meter to measure the actual capacitance of the capacitor and compare it with the nominal value.
  If the difference is large (more than 20%), it may be damaged.
• Leakage test: Use an insulation resistance tester (megohmmeter) to measure the leakage resistance of the capacitor.
  If the leakage resistance value is significantly low, it indicates that the capacitor may have leakage problems.
• Short circuit and open circuit test: Use a multimeter to measure whether the capacitor is short circuited or open circuited.
  If it displays as short circuited (resistance close to 0 ohms) or open circuited (resistance infinite), the capacitor is damaged.
• Equivalent series resistance (ESR) test: Use an ESR tester to measure the equivalent series resistance of a capacitor.
  If the ESR value is high, it indicates that the internal losses of the NP Aluminum Electrolytic Capacitors have increased and may be damaged.

Below is a picture of WMX-R Radial 3.9uF ±20% 50V 5*11mm P:2mm Bulk RoHS, small size, specially designed for speaker and audio applications,
free samples are available for testing. Please contact with us now for more details, thank you.

Do you know that in our daily lives, there is a radial and axial aluminum electrolytic capacitor called NP in audio and speaker devices, which is used to label the capacitor with NP to indicate that the capacitor is non-polar? Capacitor, as an electronic component, consists of two metal electrodes and an insulating dielectric sandwiched between them.

What is its function?

NP Aluminum Electrolytic Capacitors play a crucial role in circuits. It is mainly used to store charges and release electrical energy when needed, thereby achieving stable operation of the circuit. Specifically, capacitors can filter out clutter in circuits, making signals purer; At the same time, it can also provide additional power when the power supply is unstable, ensuring the normal operation of the circuit.

In addition, NP Aluminum Electrolytic Capacitors can also participate in circuit operations such as resonance and oscillation, providing various functions required for electronic devices. In short, capacitors, with their unique energy storage characteristics, provide strong guarantees for the stability and reliability of circuits, and are essential components in electronic circuits.

If you need it, please contact WEET and we will provide you with the best service. The factory has advanced production equipment that can produce various specifications of products, and the product quality has always been stable at a high level. The factory always adheres to high-quality and safe production standards.

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Low Dissipation Factor, MAX 5% at 120Hz, Bi-Polarized，105℃ 1000 hours

Specially produced for Cross-Over Networks with high fidelity audio system

High-quality crossover non-polar aluminum electrolytic capacitors

Product mainly used: audio converters and dividers (partials), Audio amp, automotive electronics products, speaker.

Popular Items cross reference to Visaton brand. 

https://www.visaton.de/en/products/accessories/crossover-parts/electrolytic-capacitors

" I received all items in perfect condition a week ago.

I did some tests on WMM series and they perform very well, much better than the Visaton brand."

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WEE Technology Company Limited - WEE are Capacitors Specialist

WEET WAA Axial 85C 2000H Polarized Aluminum Electrolytic Capacitors Standard Low Voltage
WEET WAB Axial 105C 1000H Polarized Aluminum Electrolytic Capacitors Super Low Voltage
WEET WMN BP Axial Bi polar 120HZ Aluminum Electrolytic Capacitors For Audio and Speaker System: Low Dissipation Factor, MAX 5% at 120Hz, Bi-Polarized，105℃ 1000 hours
WEET WMM BP Axial Bi polar Aluminum Electrolytic Capacitors for Audio and Speaker System: Low Dissipation Factor MAX 5% at 1KHz，Bi-Polarized，105℃ 1000 hours
WEET WMS NP Axial Non polar Aluminum Electrolytic Capacitors for Audio and Amplifier System: Low Dissipation Factor MAX 10 % at 1KHz，Bi-Polarized，105℃ 1000 hours

https://www.weetcap.com/Aluminum-Electrolytic-Capacitors/

WEE Technology Company Limited - WEE are Capacitors Specialist

WEE Technology focus on axial lead electrolytic capacitor, WEET brand, non-polar capacitor, high-temperature resistant capacitor, high-frequency capacitor, super capacitor, axial capacitor, pencil capacitor, audio capacitor.

These products are mainly used in switching power supply, power adapter, charger, various household appliances, audio equipment, stage lighting, LED lamp drive power supply, electric vehicle charger, computer power supply, electric welding machine, frequency converter and other fields.

WEE Technology Company Limited - WEE are Capacitors Specialist
WEE Technology focus on axial lead electrolytic capacitor, WEET brand, non-polar capacitor, high-temperature resistant capacitor, high-frequency capacitor, super capacitor, axial capacitor, pencil capacitor, audio capacitor
These products are mainly used in switching power supply, power adapter, charger, various household appliances, audio equipment, stage lighting, LED lamp drive power supply, electric vehicle charger, computer power supply, electric welding machine, frequency converter and other fields.

WEET WAA Axial 85℃ 2000H Polarized Aluminum Electrolytic Capacitors Standard Low Voltage
Operating Temperature： -40℃~+85℃
Rated Voltage： 6.3V ~ 450V
Capacitance Range： 1uF ~ 10000uF
Capacitance Tolerance： ±10%(K), ±20%(M)
https://www.weetcap.com/Aluminum-Electrolytic-Capacitors/WEET-WAA-Axial-85C-2000H-Polarized-Aluminum-Electrolytic-Capacitors-Standard-Low-Voltage.html

WEET WAB Axial 105℃ 1000H Polarized Aluminum Electrolytic Capacitors Super Low Voltage
Operating Temperature： -40℃~+105℃
Rated Voltage： 6.3V ~ 450V
Capacitance Range： 1uF ~ 4700uF
Capacitance Tolerance： ±10%(K), ±20%(M)
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Dimension diameter: Φ 5mm to Φ 25mm
Height (length): 11mm to 52mm
Voltage: 6.3V to 500V
Temperature: - 40 ℃ to+85 ℃，2000H; - 40 ℃ to+105 ℃, 1000H
Capacity: 0.1uF to 10000uF
Service life: 1000 hrs to 2000 hrs
Taping Product size: Φ 5mm to Φ 16mm
Package: horizontal (axial through core) electrolytic capacitor
Polarity: Polarized

WEET also can provide from polarity to non polarity (bipolar, horizontal non polarity) electrolytic capacitor

Characteristics: from ordinary to special (high-frequency low impedance electrolytic capacitor, low leakage electrolytic capacitor, special size electrolytic capacitor)

Products used in: communication products (power supply, main plate), frequency converter, power supply, audio and frequency divider, LCD, energy-saving lamp, ballast, camera Audio amplifier, electronic digital picture frame, automotive electronics,

WEE Technology Company Limited - WEE are Capacitors Specialist

The relative relationship between the service life of electrolytic capacitor and ambient temperature. 

When the ripple current is constant (such as rated ripple current), the higher the ambient temperature, the shorter the service life of electrolytic capacitor.
If the ambient temperature is too high and exceeds the maximum rated temperature of the electrolytic capacitor, the electrolyte in the electrolytic capacitor will boil and produce overvoltage, and the pressure relief parts will produce irreversible pressure relief action, resulting in electrolyte leakage and permanent damage to the electrolytic capacitor.Therefore, the storage and service temperature of electrolytic capacitors must not exceed the rated temperature. 

On the contrary, if the working temperature is reduced, the service life of electrolytic capacitor can be greatly increased. For example, the service life of electrolytic capacitor with rated maximum temperature of 85 ℃ is 1000 hours under the ambient temperature of 85 ℃, while when the ambient temperature is reduced to 60 ℃, the service life can be extended to about 10000 ℃, and when the ambient temperature is reduced to 40 ℃, the service life can reach about 80000 hours, In actual use, it can be seen that the actual service life of electrolytic capacitor is much higher than the nominal value, which is the reason why the service temperature is lower than the maximum rated temperature.

Therefore, if conditions permit, it is a good way to reduce the ambient temperature as much as possible to prolong the service life of electrolytic capacitor. Therefore, it is usually required that electrolytic capacitor should be far away from the heat source in design.