TDK Corporation recently announced the new B2568* series of EPCOS MKP dc link power capacitors, which offer robustness under harsh environmental conditions. The new capacitors are designed for voltages between 900 and 3000 V dc, covering a capacitance range of 50 to 4000 µF. Depending on type, the capacitors are dimensioned for currents of up to 100 A. The ESL values range from 35 to 80 nH. Capacitors with ESL values of less than 20 nH are available upon request.
According to the company, these capacitors are well-suited for IGBT-based converters in traction applications, as well as medium-voltage drives, because of their robust design and high rated voltages.
Owing to the polyurethane filling, the windings have a high mechanical stability within the hermetically sealed can, says TDK. The capacitors comply with climate class C and pass a temperature, humidity, bias (TBH) test at 85°C, 85% relative humidity with a rated voltage applied for 1000 hours. Condensation up to a certain level on the capacitors during operation is also permissible.
The new power capacitors meet all requirements concerning fire protection in rail vehicles according to EN 45545.
Main Applications
- IGBT-based converters in traction applications
- Medium-voltage drives
Main Features and Benefits
- Voltage range of 900 to 3000 V dc
- Capacitances from 50 to 4000 µF
- Hermetically sealed design
- Fire protection according to EN 45545