TDK-EPCOS aluminum electrolytic capacitors have found wide application practically in all fields of electronics thanks to their advantages: :
- High specific capacitance which allows to produce components with capacity up to 1 F;
- Compact sizes at high values of nominal capacitance;
- High ripple current;
- High reliability;
- Optimal ratio price/productivity.
Specific capacitance of Epcos electrolytic capacitors reaches practically a limited value. Like the rest capacitors they consist of two electrically conductive plates separated by a dielectric layer.
One of electrodes - anod - is made of Al foil with increased effective surface area and is covered by oxide layer (Al2O3). In order to increase a capacitance TDK (Epcos) has developed a special method of foil etching that increases effective surface area.
Such foil allows to manufacture very compact electrolyte capacitors. A thickness of alumina layer is about 1 μF that determines a high specific capacitance of electrolytic capacities.
Electrolyte (a conductive liquid) that is used as a cathode. Its main task is to fill all micropits on cathode and to effectively use its surface.
Aluminum electrolytic capacitors TDK-EPCOS perfectly suit for application in industrial, consumer and automotive electronics.
For comfortable using and mounting Epcos produces electrolytic capacitors with following types of terminals:
- screw;
- with 4-/5-pin snap-in terminals and solder pins;
- snap-in;
- axial-lead;
- soldering star capacitors;
- single-ended
Capacitors with screw terminals
Capacitors with screw terminals are designed for operating in high current circuits and provide the best connection between capacitor and terminals. They are more stable to vibration due to rigid fixing on circuit board.
Furthermore, additional heat rejection is realised through a screw connection that is extremely useful in harsh temperature conditions. EPCOS also offers special versions of capacitors for heat rejection.
Voltage range 16…100; 200…500; 500 V
Load current range 34…110 А
Capacity range 820…33000; 1500…330000 μF
Voltage range 16…100; 200…500; 500 V
Load current range 34…110 А
Capacity range 820…33000; 1500…330000 μF
Not long ago TDK (Epcos) has represented three new series of electrolytic capacitors with screw terminals with longer useful life (up to 12000 hours) at Maximal working temperature 85°С:
- Capacitors series B43703** is characterised by CR=1500μF ... 22000μF. The sizes of this components are decreased on 20% comparing to previous series at the same current-carrying capacity.
- Capacitors B43704** have a higher values of high ripple current (on 25%) comparing to and are characterised by small sizes. Components of this series can be used at VR=350V ... 550V DC и СR=820μ ... 22000μ.
- Current-carrying capacity of series B43705* has been increased on 40% comparing to previous series saving compact sizes, VR=350V ... 450V DC, and СR=1000μF ... 18000μF.
- Capacitors B43723**, B43724** and B43725** have an dditional advantage - fastening with a stud on a base.
Additional information
| Series | Nominal voltage VR, В (DC) |
Nominal capacitance CR, мкФ |
Maximal operating temperature | Features | Detailed information |
| Low-voltage series (B41...) | |||||
| B41456/ B41458 |
16…100 | 2200…680000 | 85°С | Compact capacitors with long useful life |  |
| B41560/ B41580 |
25…100 | 1500…330000 | 105°С | Extremely compact capacitors. High current-carrying capacity | |
| B41550/ B41570 |
16…100 | 1500…220000 | 105°С 125°С (without insulating film) |
Series SIKOREL. High reliability. Long useful life. Shelf life is 10 years. | |
| B41554 | 16…100 | 1500…220000 | 125°С | Series SIKOREL. High reliability. Long useful life. Shelf life is 10 years. | |
| High-voltage capacitors (B43...) | |||||
| B43464/ B43484 |
350…450 | 1000…12000 | 85°С | Standard series of capacitors for general application. | |
| B43455/ B43457 |
350…450 | 1000…15000 | 85°С | >10000 hours (при 85°С). | |
| B43456/ B43458 |
350…450 | 1000…18000 | 85°С | Compact capacitors with useful life >12000 hours (при 85°С). High reliability. | |
| B43560/ B43580 |
350…450 | 2200…15000 | 105°С | Shelf life >30000 hours (at 85°С), >6000 hours (at 105°С). Compact sizes, high reliability. | |
| B43564/ B43584 |
200…500 | 1000…18000 | 85°С | Shelf life >15000 hours (at 85°С). High reliability. | |
| B43750/ B43770 |
350…400 | 560…5300 | 105°С | Shelf life >8000 hours (at 105°С). Extra high current-carrying capacity (up to 110 А). Special construction for heat rejection | |
| B43700/ B43720 |
600 | 1200…6800 | 85°С | High-Voltage series | |
| B43740/ B43760 |
350…500 | 1000…18000 | 105°С | Capacitors with higher reliability | |
| New series of high-voltage capacitors (B43...) | |||||
| B43703/ B43723 |
350…450 | 1500...22000 | 85°С | Extra compact capacitors with long useful life >12000 hours | |
| B43704/ B43724 |
350…550 | 820...22000 | 85°С | High ripple current | |
| B43705/ B43725 |
350…550 | 1000...18000 | 85°С | High ripple current. Long useful life >12000 hours. | |
Capacitors with Snap-in terminals (soldering)
Using of TDK-EPCOS capacitors with Snap-in terminals makes the mountig process more comfortable. Special snap-in terminals reliably keep the capacitors on circuit board.
Together with standard models with 2 pins also 3-pin series are being produced. These capacitors are defended from incorrect mounting.
Voltage range 10…100 V
Capacity range 47…6800 μF
Voltage range 10…100 V
Capacity range 47…6800 μF
Additional information
| Series | Nominal voltage VR, V (DC) |
Nominal capacitance VR, мкФ |
Maximal operating temperature | Features | Detailed information |
| B41231 | 10…100 | 1200…68000 | 85°С | Standard series of generel application | |
| B41505 | 10…100 | 560…33000 | 105°С | Excellent performance, low ESR, outstanding ripple current. | |
| B43305 | 200…450 | 68…3300 | 85°С | Extremely high CV product, ultra compact, high ripple current capability | |
| B43501 | 10…100 | 560…33000 | 85°С | Long useful life | |
| B43504 | 200…450 | 47…2200 | 105°С | High ripple current capability, low ESR | |
| B43508 | 200…450 | 82…2700 | 105°С | Extremely high CV product, ultra compact, high reliability | |
| B43540 | 200…450 | 82…2700 | 85°С 105°С (при V=VR • 0.93) |
Long useful life, high reliability, outstanding ripple current capability | |
| B43541 | 550…600 | 47…390 | 85°С 105°С (при V=VR • 0.93) |
Long useful life, high reliability, high ripple current capability. | |
| B43544 | 200…550 | 47…2700 | 105°С | High reliability, extremely improved performance at high frequencies. | |
| B43601 | 200…450 | 82…2700 | 85°С 105°С (при V=VR • 0.93) |
Long useful life, high reliability | |
| B43640 | 200…450 | 82…3300 | 105°С | High reliability, high ripple current capability. | |
| B43644 | 200…500 | 39…2700 | 105°С | High reliability, long useful life, high ripple current capability | |
| New series of high-voltage capacitors (B43...) | |||||
| B43545 | 400…450 | 82…820 | 105°С | Long useful life, very high CV product, compact | |
| B43547 | 200…450 | 82…2200 | 105°С | High reliability, extremely improved performance at high frequencies | |
| B43642 | 200…450 | 82…3300 | 105°С | Very high ripple current capability, high reliability | |
4-pin (snap-in and soldering)
4-pin electrolytic capacitors (TDK-EPCOS) are high-voltage components with snap-in terminals. Increased capacity and nominal voltage are being combined with easy mounting.
Capacitors of this series are protected from incorrect mounting on a board.
For more rigid mounting Epcos produces a series of 5-pin capacitors.
Such a construction provides additional vibration stability.
Voltage range 350…500 V
Capacitance range 330…3300 μF
Additional information
| Series | Nominal voltage VR, В (DC) |
Nominal capacitance VR, мкФ |
Maximal working temperature | Features | Additional information |
| B43510/ B43520 |
385…500 | 330…3300 | 85°С 105°С (при V=VR • 0.90) |
New diameter 50 mm available, extremely high volumetric efficiency, high ripple current capability | |
| B43511/ B43521 |
350…450 | 390…2200 | 85°С 105°С (при V=VR • 0.90) |
Long useful life, outstanding ripple current capability | |
| B43515/ B43525 |
350…450 | 390…2700 | 105°С | High reliability and high ripple current capability | |
Large-size capacitors
Large-size capacitors - a special series of low-voltage capacitors.
Such capacitors are developed for application in power electronics and for hard service conditions.
The main features - a high ripple current capability, high working temperature, long useful life, vibration stability. Shelf life is up to 15 years at storage temperatures up to 40 °C.
All components of this series have characterisitics optimized for high-frequency currents.
Capacitors are represented by two types of terminals - snap-in and soldering.
Voltage range 25…63
Capacitance range 2000…27000; 900…4700 μF
Voltage range 25…63
Capacitance range 2000…27000; 900…4700 μF
Additional information
| Series | Nominal voltage VR, V (DC) |
Nominal capacitance VR, μF |
Maximal working temperature | Featurs | Additional information |
| B41605 | 25…63 | 2000…27000 | 125°С | Very high ripple current capability optimized for high frequencies, сompact design | |
| B41607 | 25…63 | 900…4700 | 125°С | Outstanding reliability and long useful life, up to 10000 h at 125 °C. Very high ripple current capability optimized for high frequencies | |
Axial-lead and soldering star capacitors
Special series of Epcos capacitors for automative electronics.They are characterised by a very high ripple current capability, long useful life, (2000 h at up to 150 °C),
low ESR also at 63 V DC and high vibration stability. Shelf life is up to 15 years at storage temperatures up to 40 °C. Soldering star terminals provide an easy and reliable mounting.
Voltage range 25…100; 160…250
Capacitance range 100…6800; 22…130 мкФ
Voltage range 25…100; 160…250
Capacitance range 100…6800; 22…130 мкФ
Additional information
| Серия | Nominal voltage VR, В (DC) |
Nominal capacitance VR, мкФ |
Maximal working temperature | Features | Additional information |
| B41689/ B41789 |
25…63 | 270…4500 | 125°С (150°С) |
Extra high ripple current capability, long useful life, low ESR | |
| B41690/ B41790 |
25…63 | 300…10000 | 125°С (140°С) |
Ultra compact design, long useful life, 2000 h at up to 140 °C | |
| B41691/ B41791 |
25…63 | 100…4000 | 125°С (150°С) |
High ripple current capability, high vibration stability | |
| B41692/ B41792 |
25…63 | 220…6800 | 125°С (140°С) |
Compact design, high vibration stability | |
| B41693/ B41793 |
25…100 | 100…4000 | 125°С (150°С) |
Outstanding parametric stability, high ripple current capability, high vibration stability, long useful life | |
| B41695/ B41795 |
25…75 | 220…6800 | 125°С (140°С) |
Optimized CV value, high ripple current capability, high vibration stability | |
| B41696/ B41796 |
25 и 75 | 470…6800 | 125°С | Compact design, high ripple current capability, high vibration stability. | |
| B43693/ B43793 |
160…250 | 22…130 | 125°С | High ripple current capability, high vibration stability, long useful life | |
| B416**/B436** - axial-lead B417**/BB437** - soldering star capacitors |
|||||
Single-ended capacitors
Standard series of single-ended EPCOS capacitors is represented by two types of components: capacitors of general application and high-reliable capacitors for Automotive electronics.
Capacitors for Automotive electronics are characterised by a small rejection during useful life and large current capability that allows them to operate at 135 °C. The series of capacitors for general application is represented for opeating at large voltage. That'a why this series include capacitors with working voltage up to 450V.
Voltage range 10…100 V; 160…450 V
Capacitance range 2.2…10000 μF
Voltage range 10…100 V; 160…450 V
Capacitance range 2.2…10000 μF
Additional information
| Series | Nominal voltage VR, В (DC) |
Nominal capacitance VR, мкФ |
Maximal working temperature | Features | Additional information |
| Capacitors of general application | |||||
| B41851 B43851 |
6.3…100 160…450 |
0.1…10000 0.47…680 |
105°С | Standard series. Compact, high CV product. | |
| B41856 | 16…50 | 100…2200 | 105°С | LOW ESR, high ripple current capability | |
| B41858 | 10…100 | 22…10000 | 105°С | Low ESR, high reliability | |
| B41890 | 16…50 | 100…6800 | 105°С | Extra long useful life, high reliability | |
| B43888 | 160…450 | 3,3…330 | 105°С | Compact dimensions, high ripple current capability at high frequency | |
| B43890 | 160…450 | 3,3…330 | 105°С | High ripple current capability at high frequency, extra long useful life. | |
| Capacitors forAutomotive electronics | |||||
| B41863 | 25…35 | 680…8500 | 105°С | Compact design | |
| B41858 | 10…100 | 22…10000 | 105°С | Low ESR, high reliability | |
| B41859 | 16…50 | 100…3300 | 105°С | Very low ESR | |
| B41888 | 10…63 | 47…10000 | 105°С | Long useful life, low ESR | |
| B41866 | 10…75 | 10…10000 | 125°С | High reliability, long useful life, high ripple current capability | |
| B41895 | 25…50 | 470…6800 | 125°С | Very compact design, high operating temperature capability | |
| B41896 | 10…50 | 180…10000 | 125°С/ (135°С) | Radial leads, charge-discharge proof, polar. | |
| B43896 | 160…250 | 33…270 | 125°С | High voltage design, high ripple current capability. | |
Additional information
In 2015 Epcos-TDK has represented new series of electrolytic capacitors with
improved electric characteristics. At present moment low-voltage and high-voltage capacitors with standard leads
а are in a Epcos-TDK web site's search list :
- Screw terminals:B43700, B43701, B43703, B43704, B43705, B43712, B43713, B43720, B43720, B43723, B43724, B43725, B43732, B43733, B43741, B43752, B43761, B43772 и B43793
- Snap-in:B41231, B41252, B43509, B43513, B43516, B43544, B43545, B43547, B43624, B43630, B43634, B43455, B43640, B43642, B43644
- Axial-lead:B41689, B41690
- Single-ended: B41856, B41858, B41859, B41863, B41866, B41887, B41890, B41895,
Search by characteristics
One can use the special
search program on Epcos web-site
