Inductors
April 15, 2026
TDK enables compact 1250 V DC converter designs with a new high-voltage common-mode choke
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TDK Corporation (TSE: 6762) presents the B82722V6*B040 series of new compact high-voltage, current-compensated ring-core double chokes. Designed primarily for rated DC voltages of up to 1250 V (630 V AC), these compact common-mode chokes (23 x 15.5 x 24 mm) effectively suppress EMI in next-generation applications. These include power converters, industrial motor drives, and switch-mode power supplies that often deploy SiC and GaN power semiconductors and feature elevated DC bus voltages, where insulation coordination and PCB space are critical.
The series covers nominal inductance values ranging from 3.3 mH to 22 mH, with rated currents between 0.85 A and 3.0 A at a rated ambient temperature of +70 °C. Multilayer solid insulation construction and testing with voltages of 3,750 V (line-to-line) ensure robust electrical isolation. Thanks to the special automated winding technique, these chokes feature high resonance frequency characteristics and a typical stray inductance of around 0.6%, helping to suppress symmetrical interference.
The epoxy coating of the ferrite core and the plastic header comply with UL 94 V-0. The design fulfills the latest IEC 60938-2 and IEC/UL 60939-3 safety requirements for EMI chokes and filters. Suitable for wave soldering and offered in a compact vertical design, the B82722V6*B040 series enables engineers to realize 1250 V DC high-voltage architectures without increasing the PCB footprint.
Features & Applications
Main applications
- Suppression of common-mode interference
- Compact switch-mode applications
- Frequency converters
Main features and benefits
- Very high voltage rating
- High resonance frequency due to special winding technique
- Approx. 0.6% stray inductance for symmetrical interference suppression
- Space-saving design
- Suitable for wave soldering
- Design complies with IEC 60938-2 (630 V AC, 50/60 Hz, PIII; 1250 V DC-link, PII)
- RoHS-compatible
Key Data
Ordering code | Rated current | Nominal inductance | Stray inductance | DC resistance |
|---|---|---|---|---|
| B82722V6851B040 | 0.85 | 22 | 130 | 550 |
| B82722V6112B040 | 1.1 | 15 | 92 | 320 |
| B82722V6152B040 | 1.5 | 10 | 61 | 188 |
| B82722V6202B040 | 2.0 | 6.8 | 40 | 115 |
| B82722V6252B040 | 2.5 | 4.7 | 28 | 76 |
| B82722V6302B040 | 3.0 | 3.3 | 20 | 53 |
Further information on the products can be found at www.tdk-electronics.tdk.com/en/power_chokes
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About TDK Corporation
TDK Corporation (TSE:6762) is a global technology company and innovation leader in the electronics industry, based in Tokyo, Japan. With the tagline “In Everything, Better” TDK aims to realize a better future across all aspects of life, industry, and society. For over 90 years, TDK has shaped the world from within; from the pioneering ferrite cores to cassette tapes that defined an era, to powering the digital age with advanced components, sensors, and batteries, leading the way towards a more sustainable future. United by TDK Venture Spirit, a start-up mentality built on visions, courage and mutual trust, TDK’s passionate team members around the globe pursue better—for ourselves, customers, partners, and the world. Today, the state-of-the-art technologies of TDK are in everything, from industrial applications, energy systems, electric vehicles, to smartphones and gaming, at the core of modern life. TDK’s comprehensive, innovative-driven portfolio includes cutting-edge passive components, sensors and sensor systems, power supplies, lithium-ion and solid-state batteries, magnetic heads, AI and enterprise software solutions, and more—featuring numerous market-leading products. These are marketed under the product brands TDK, EPCOS, InvenSense, Micronas, Tronics, TDK-Lambda, TDK SensEI, and ATL. Positioning the AI ecosystem as a key strategic area, TDK leverages its global network across the automotive, information and communication technology, and industrial equipment sectors to expand its business in a wide range of fields. In fiscal 2025, TDK posted total sales of USD 14.4 billion and employed about 105,000 people worldwide.