Aluminum Electrolytic Capacitors
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Capacitors with Screw Terminals
Capacitors for Pulse Applications
Snap-in, Multi Pin, Large Size Capacitors
Axial Capacitors
Hybrid Polymer Capacitors
SMD Capacitors
Single-Ended (Radial) Capacitors
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Find the optimal products for you based on the product type, performance, temperature and useful life.
Find the optimal products for you based on the product type, voltage class, temperature and ripple current.
Products & Technologies
TDK Corporation (TSE:6762) announces the new EPCOS B43659 series of snap-in aluminum electrolytic capacitors. This is the next generation of ultra-compact general-purpose components for voltages of 450 V (DC) featuring an extremely high CV product. It provides the same features and serves the same applications as the previous series; however, the B43659 is much more compact. In case sizes of only 22 mm x 25 mm to 35 mm x 50 mm (D x H), these components achieve capacitances ranging from 140 µF to 1030 µF. In addition to the standard versions with 2 terminals, versions with 3 terminals are also available to ensure correct installation.
TDK Corporation (TSE:6762) presents the B40910 series of hybrid polymer capacitors which can handle up to 4.6 A (100 kHz, +125 °C). This is because at room temperature the surface mount components offer an extremely low ESR value of 17 mΩ and 22 mΩ, respectively. Furthermore, their ESR does not change as much with temperature as standard electrolytic capacitors with liquid electrolytes. The 10 x 10.2 mm or 10 x 12.5 mm (D x H) small components have a rated voltage of 63 V and cover a capacitance range from 82 µF to 120 µF.
TDK Corporation (TSE:6762) presents the new EPCOS B43657* aluminum electrolytic capacitor series with snap-in terminals. The capacitors achieve a service life of at least 2000 h at a maximum operating temperature of 105 °C and cover a rated voltage range from 450 V DC to 475 V DC with capacitance values from 120 µF to 1250 μF. An important performance feature is their high ripple current capability of up to 8.54 A (120 Hz, 60 °C). Accurate lifetime calculation under application-specific conditions is quick and easy with the online AlCap Tool.
Applications & Cases
With the increasing market for electrified vehicles (EVs), the demand for on-board chargers (OBCs) is growing fast. OBCs open up the possibility to charge the car not only at fast-charging DC stations but also with AC sources in a reasonable time. Such systems are currently going up to 22 kW with operating voltages up to 800 V. The function of the OBC is to convert the AC voltage from an external source to a specific DC voltage that is based on the requirements of the battery management system. By this, a battery-saving and fast charging process can be reached. Especially in remote areas without sufficient fast DC charging infrastructure, OBCs are essential to make EVs more attractive.
High energy, reliable and volumetric efficient inverters are essential to reducing emissions of vehicles based on 48 V technology. DC-link capacitors can significantly contribute to this target by reducing parasitic losses and increasing thermal efficiency. High inverter powers can be theoretically achieved with multiple capacitor connections. However, a high number of parallel-connected parts also increase the complexity of the system stability. In the field of Aluminum Electrolytic Capacitors, the Hybrid Polymer technology offers higher ripple current densities by a factor of, e.g., 5x compared to standard Liquid Electrolyte technology. By applying the Hybrid Polymer technology to the large axial capacitor can sizes, with solid mechanical construction and special thermal dissipation feature, a compact DC-link solution with a reduced amount of capacitor and minimized thermal escalation risk through stable and efficient thermal design can be achieved.
The car of tomorrow is unthinkable without innovative electronics. Correspondingly, there is a vast range of new TDK and EPCOS components, both for conventional vehicle technology and for e-mobility.
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TDK Product Features
The capacitance of aluminum electrolytic capacitors is defined by the surface of the aluminum anode foil. This surface is maximized by special etching processes, giving these capacitors the highest volumetric capacitance of all capacitor technologies and thus an attractive cost per capacitance ratio.
Hybrid Polymer Aluminum Electrolytic capacitors are defined by extremely low ESR and therefore highest ripple current density which is reached by a combination of a highly conductive polymer and a liquid electrolyte is used instead of a liquid electrolyte
Typical applications for aluminum electrolytic capacitors are in frequency converters, wind power converters, solar inverters, professional power supplies and UPS, medical applications, professional photoflash units and a wide range of automotive applications. The TDK aluminum electrolytic capacitors feature outstanding ripple current capabilities and very long-term reliability. Design flexibility and engineering expertise allow TDK to offer custom specific solutions.
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