High-Performance DC-Link Solutions for SiC and GaN Converters
TDK’s ModCap modular DC-link film capacitors are designed for high‑current, high‑temperature DC-link stages in power converters that use wide‑bandgap devices such as SiC and GaN. With very low ESL around 8 nH, low ESR and long lifetime, they deliver stable DC-link performance in compact, thermally challenging designs for renewable energy, energy storage, traction and industrial drives. The ModCap family includes ModCap MF (B25645), ModCap HF (B25647) and the new ModCap UHP (B25648) series, giving engineers a scalable platform from medium-frequency DC links to high-frequency with 105 °C performance.
Why Choose TDK ModCap DC-Link Capacitors?
Modular, busbar-friendly construction
Rectangular 205 mm × 90 mm × 170 mm housings with screw terminals for easy integration and paralleling in high‑power converters.
Optimised for WBG devices
Very low ESL and low ESR to support fast SiC and GaN switching with reduced overshoot and losses.
High-temperature capability
ModCap UHP (B25648A) uses BOEPN dielectric to enable +105 °C hotspot operation without derating and a 200,000‑hour lifetime.
Sustainable, robust design
For sustainability ISCC-certified bio-circular PP film used. Fire safety standard met with certification EN 45545-2 HL3 R23 and UL certified.
Design support tools
Access to TDK ModCap SPICE models and CAP Thermal for detailed thermal analysis and DC-link optimisation.
- ModCap UHP (B25648A)
- ModCap HF (B25647A)
- ModCap MF (B25645A)
Ultra-high Performance +105 °C DC-link
ModCap UHP is TDK’s latest generation of DC-link film capacitors for converters that must run hotter and harder without increasing footprint. Using a BOEPN dielectric (a blend of polypropylene and cyclic olefin copolymer), ModCap UHP raises the rated hotspot temperature by 15 K compared with standard BOPP film and supports higher current density.
| Image | Description | Capacitance | ||
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Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 880 F | ADD TO BASKET | |
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 640 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 470 F | ADD TO BASKET | ||
High-frequency DC-link for advanced semiconductors
ModCap HF uses a BOPP dielectric and is widely deployed as a high-frequency DC-link capacitor with advanced semiconductor technologies. It provides extremely low inductance, low ESR and long lifetime in a modular rectangular format.
| Image | Description | Capacitance | ||
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Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 1200 µF | ADD TO BASKET | |
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 1520 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 640 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 880 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 940 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 1850 µF | ADD TO BASKET | ||
Medium-frequency DC-link capacitors
ModCap MF uses bio‑based polypropylene film to deliver robust DC-link performance across a broad range of voltage and capacitance combinations in industrial and renewable power converters. Two versions available in sizes 205 mm × 90 mm × 170 mm and 220x115x215.
| Image | Description | Capacitance | ||
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Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 430 µF | ADD TO BASKET | |
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 1025 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 980 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 1050 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 1330 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 1375 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 1700 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 1865 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 1895 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 2525 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 3210 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 535 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 720 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 350 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 670 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 820 µF | ADD TO BASKET | ||
| Power Film Capacitor, Bio-Based Polypropylene Film, ± 10%, DC Link, Chassis Mount | 3900 µF | ADD TO BASKET | ||
Typical ModCap applications
ModCap MF, HF and UHP capacitors are ideal for DC-link stages that must handle high electric fields, large current densities and elevated temperatures while maintaining a long lifetime.
AI infrastructure
Solar and wind power converters and electrolyzers
Energy storage system inverters and bidirectional converters
Traction inverters and auxiliary drives
Harsh‑environment IP65 inverters
High‑power industrial drives and DC‑DC converters
Frequently Asked Questions
ModCap MF (B25645) is the medium‑frequency DC-link family for robust, cost‑effective industrial and renewable converters. ModCap HF (B25647) targets high‑frequency DC-links with very low ESL and ESR for advanced semiconductor switches. ModCap UHP (B25648) adds a BOEPN dielectric to support +105 °C hotspot operation and higher current density for the most thermally demanding designs.
Use ModCap UHP when your DC-link sits close to hot SiC or GaN modules, when ambient or coolant temperatures are high, or when you need to reduce the number of capacitors in parallel while still meeting lifetime targets at elevated hotspot temperatures.
Yes. Both series share the same rectangular 205 mm × 90 mm × 170 mm footprint and screw‑terminal layout, so ModCap UHP can often be used as a drop‑in mechanical replacement for ModCap HF, subject to electrical and thermal checks.
Very low ESL, low ESR over frequency and high current capability make ModCap a strong choice for SiC and GaN DC-link capacitors in high‑efficiency power electronics. These characteristics help control voltage overshoot, reduce losses and maintain long‑term reliability in wide‑bandgap converter designs.
Typical uses include solar and wind converters, electrolyzers, energy storage system inverters, traction inverters, harsh‑environment IP65 drives and high‑power industrial DC‑DC converters, where power density and thermal robustness are critical.
See all other TDK DC-Link Film Capacitors
Looking for other TDK DC-link film capacitor series such as B3271, B3267 or B3277? Explore the full DC-link portfolio.
View all TDK DC-Link Film Capacitors ↑
Contact Avnet Abacus Experts
Have questions about TDK ModCap DC-link film capacitors or need assistance selecting the right ModCap MF, HF or UHP device for your design? Our technical experts are here to help.
Get in touch with us today to discuss your specific DC-link requirements and benefit from personalised support, design guidance and fast product availability.