Why EPCOS MKK440 D-28.1-01 Stands Out in Power Electronics
With over 30 years of expertise in capacitor manufacturing, EPCOS (now part of TDK Electronics) has engineered the MKK440 D-28.1-01 metallized polypropylene film capacitor to meet rigorous industrial demands. Designed for snubber circuits and DC-link applications, this component operates reliably at -40°C to +100°C and handles pulse voltages up to 1,400 VDC.
Real-World Case: Wind Turbine Converters
In a 2022 upgrade project for offshore wind farms, Siemens Energy integrated MKK440 capacitors into their 3MW converter systems. The result? A 12% reduction in harmonic distortion and 98.3% uptime over 18 months – outperforming previous models using standard capacitors.
Technical Advantages at a Glance
- Capacitance range: 28 μF ±5%
- Low ESR: <10 mΩ at 10 kHz
- Self-healing technology for fault tolerance
- Compact design (76mm × 45mm × 110mm)
Maintenance teams particularly appreciate its non-vented construction, which eliminates electrolyte leakage risks in vibration-heavy environments like railway traction systems.
Market Adoption Trends
Industry reports show a 17% YoY growth in MKK-series adoption since 2020, driven by EV charging infrastructure expansion. ABB’s Terra HP chargers using these capacitors achieve 95% efficiency at 350 kW outputs.
When specifying power electronics components, engineers increasingly prioritize the MKK440’s combination of 50,000-hour lifespan (IEC 61071 certified) and cost-effectiveness – typically 15-20% lower in total ownership costs than comparable solutions.
