A Polymer electrolytic capacitor, also called polymer capacitor, is an electrolytic capacitor (e-cap) with a solid conductive polymer electrolyte. Here we refer to Hongda Polymer Aluminum Electrolytic Capacitors Aluminum.

Hongda Capacitors Polymer Aluminum capacitor is a upgrade level capacitor with better performance:

 ● Featured with ultra-low ESR and high ripple current

Their electrical parameters have similar temperature dependence, reliability and service life compared to solid tantalum capacitors, but have a much better temperature dependence and a considerably longer service life than aluminium electrolytic capacitors with non-solid electrolytes. In general polymer e-caps have a higher leakage current rating than the other solid or non-solid electrolytic capacitors

● Available in a hybrid construction

The hybrid polymer aluminium electrolytic capacitors combine a solid polymer electrolyte with a liquid electrolyte. These types are characterized by low ESR values but have low leakage currents and are insensitive to transients, however they have a temperature-dependent service life similar to non-solid e-caps.

● Widely used for IT products, PD power supply, LED devices, 5G industry....

Mainly used in power supplies of integrated electronic circuits. As buffer, bypass and decoupling capacitors, especially in devices with flat or compact design. Thus they compete with MLCC capacitors, but offer higher capacitance values than MLCC, and they display no microphonic effect.

● Excellent performance at high or low temperature, and even keep great characteristics at -55°℃~105℃

● RoHS & REACH compliant, Halogen-free

Hongda Polymer Aluminum Electrolytic Capacitors Product Scope:

HE2 Radial Low ESR Conductive Polymer Electrolytic Capacitors

  ● Radial, Voltage Range 2.5V~25VDC 

HH2 Radial High Voltage Conductive Polymer Electrolytic Capacitors

● Radial, Voltage Range 35V~100VDC

HMB Higher Capacitance Conductive Polymer SMD Aluminum Solid Electrolytic Capacitors

● Chip Type, Voltage Range: 2.5 ~ 16V

HMR Higher Reliability Conductive Polymer SMD Aluminum Solid Electrolytic Capacitors

 ● Chip Type, Voltage Range 16 ~ 100V

HMV High Voltage/Long Life Conductive Polymer SMD Aluminum Solid Electrolytic Capacitors

● Chip Type, Voltage Range 16 ~ 125V

HMS Long Life Conductive Polymer SMD Aluminum Solid Electrolytic Capacitors

● Chip Type, Voltage Range 4 ~ 50V

Hongda Polymer Aluminum Electrolytic Capacitors work shop:

Q&A of Polymer Aluminum electrolytic capacitor

What is the difference between aluminum electrolytic capacitor and polymer?
The most notable difference between aluminum electroly cs and polymers is their electrolyte. 

Aluminum electroly cs have a liquid electrolyte while polymers have a solid electrolyte. 

These differences play a major role in the characters cs of each type of capacitor.

What is the ripple current of an aluminum capacitor?

The key selection criterion for the aluminum capacitor is the required ripple current. The ripple current consists of two components, a low-frequency ripple (50 Hz to 200 Hz) from the input and a high-frequency component from the inverter, typically 8 kHz to 20 kHz.

Is higher ripple current better for capacitor?

A higher ripple current tolerance spec is always better. If the ripple in the power applied to the capacitor exceeds the max limit the lifetime will be vastly reduced and may lead to a violent capacitor death.

How do you reduce ripple current in a capacitor?

Large input ripple voltage can cause large amounts of ripple current to flow in the bulk capacitors, causing excessive power dissipation in the ESR parasitic. To reduce the rms current in the bulk capacitors the ripple voltage amplitude must be reduced using ceramic capacitors.

Additional Information

Capacitor symbols

Parallel connection

Smaller or low voltage aluminum electrolytic capacitors may be connected in parallel without any safety correction action. Large sizes capacitors, especially large sizes and high voltage types, should be individually guarded against sudden energy charge of the whole capacitor bank due to a failed specimen.

Series connection

Some applications like AC/AC converters with DC-link for frequency controls in three-phase grids need higher voltages than electrolytic capacitors usually offer. For such applications electrolytic capacitors can be connected in series for increased voltage-withstanding capability. During charging, the voltage across each of the capacitors connected in series is proportional to the inverse of the individual capacitor's leakage current. Since every capacitor differs somewhat in individual leakage current, the capacitors with a higher leakage current will get less voltage. The voltage balance over the series-connected capacitors is not symmetrical. Passive or active voltage balance has to be provided in order to stabilize the voltage over each individual capacitor

Imprinted markings

Electrolytic capacitors, like most other electronic components, have imprinted markings to indicate the manufacturer, the type, the electrical and thermal characteristics, and the date of manufacture. In the ideal case, if they are large enough the capacitor should be marked with:

1.Manufacturer's name or trademark;

2.Manufacturer's type designation;

3.Polarity of the terminations (for polarized capacitors)

4.Rated capacitance;

5.Tolerance on rated capacitance

6.Rated voltage and nature of supply (AC or DC)

7.Climatic category or rated temperature

8.Year and month (or week) of manufacturing

• [Download]  HE2 Radial Low ESR Conductive Polymer Electrolytic Capacitors
• [Download]  HH2 Radial High Voltage Conductive Polymer Electrolytic Capaictors
• [Download]  HMV High VoltageLong Life Conductive Polymer SMD Aluminum Solid Electrolytic Capacitors
• [Download]  HMS Long Life Conductive Polymer SMD Aluminum Solid Electrolytic Capacitors
• [Download]  HMB Higher Capacitance Conductive Polymer SMD Aluminum Solid Electrolytic Capacitors
• [Download]  HMR SMD Standard Low ESR Conductive Polymer Aluminum Solid Electrolytic Capacitors
• [Download]  HPD19 Low ESR Laminated Polymer Solid Aluminum Electrolytic Capacitor