Screw Terminal Type
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Discover nowDC-Link Capacitors – Stability for Your Power Electronics
In modern power electronics, stability and efficiency are critical. DC-Link capacitors, also known as intermediate circuit capacitors, play a central role in ensuring a reliable DC power supply across a wide range of applications, from industrial drives to electric mobility.
alfatec GmbH & Co. KG, your experienced partner for electronic components, offers high-quality DC-Link capacitors from leading manufacturer Faratronic, specifically designed to meet the demanding requirements of the industry.
Function – The Heart of the DC Intermediate Circuit
The function of a DC-Link capacitor is fundamental to the design of power electronic converters such as frequency inverters or inverters. Positioned in the DC intermediate circuit—between the rectifier at the input and the inverter at the output—their main tasks are:
- Voltage Smoothing: Reducing ripple in the rectified voltage and providing a stable DC supply to the inverter.
- Energy Storage: Storing energy to compensate for load fluctuations and buffer voltage spikes or drops.
- Peak Current Supply: Delivering short bursts of high current required by the inverter.
A properly dimensioned and high-quality DC-Link capacitor unit is essential for the performance, efficiency, and service life of the overall system.
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Technical Excellence – Faratronic Capacitor Parameters
Faratronic DC-Link capacitors offered by alfatec cover a wide range of technical requirements:
- Voltage Range: Rated for demanding applications up to 2000 VDC.
- Capacitance Range: Available up to 6000 μF to meet high energy demands.
- Operating Temperature: Suitable for harsh environments, typically from −40°C to +105°C, and in some cases up to 125°C.
- Materials: High-quality metallized polypropylene film as dielectric, often potted in robust plastic or metal housings for optimal protection and thermal management.
Variety for Every Application – Capacitor Types at alfatec
DC-Link capacitors are available in various technologies. alfatec offers film capacitors from Faratronic, known for excellent electrical properties and high reliability.
- Technology: Primarily metallized polypropylene (MKP) film capacitors, known for high voltage resistance, low ESR, excellent pulse handling, and self-healing properties.
- Connection Types:
- Screw Terminals: Ideal for high currents and robust mounting.
- Radial Pins: For direct PCB mounting.
- Custom Designs: Tailored solutions in collaboration with Faratronic regarding housing, terminals, and electrical values.
While electrolytic capacitors can also be used as DC-Link capacitors, Faratronic’s film capacitors offer significant advantages in terms of lifespan, temperature range, and ripple current capability - especially in demanding industrial and automotive applications.
Our partner for DC-Link film capacitors
Faratronic
Faratronic is one of the world's largest manufacturers of film capacitors, producing DC links, X & Y capacitors and snubber film capacitors, among others. As one of the top electronic component companies in China, Faratronic invests around 3% of its turnover in R&D and supplies the automotive, energy and industrial sectors with perfectly customised solutions.
Additional Capacitor Technologies at alfatec
In addition to specialized DC-Link capacitors, alfatec also offers other capacitor types such as motor capacitors, used as run or start capacitors in single-phase and other AC motors.
These capacitor motors use phase-shifting to generate a rotating field or improve starting torque,a completely different function from energy storage and smoothing in DC-Link applications.
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See for yourself the quality and performance of our Faratronic DC-link capacitors. Request a non-binding quote today or download the data sheets.
alfatec – your partner for high-quality electronic components
As your expert partner for electronic components, alfatec supports you in selecting the right DC link capacitors for your applications. We offer comprehensive advice and are happy to answer any questions you may have about power modules.
Do you have questions about our DC link capacitors or would you like a personal consultation? Feel free to contact us.