Vishay common mode chokes have just raised the bar for high-current power electronics. Vishay Intertechnology, Inc. has introduced two new low-profile devices, the commercial-grade Vishay Dale ICMS2321-10 and the AEC-Q200-qualified automotive-grade ICMS2321-1A, that combine a heat rating current up to 30 A with a 1500 VDC dielectric withstand voltage between coils. Both devices target the demanding automotive, energy, and industrial applications where efficient noise suppression and rugged reliability are non-negotiable.
Built for Harsh Conditions: Shock, Vibration, and Heat
The new Vishay common mode chokes are engineered to thrive where ordinary magnetics fail. Their low-profile design reduces size and volume on the board, which in turn makes them more resistant to shock and vibration, a critical advantage in motor control, inverters, and under-the-hood automotive environments. An enhanced core design increases performance and saturation current at high temperatures, supporting continuous operation up to +150 °C. Add a self-shielded, rugged construction, and designers get a component that stays quiet electrically while shrugging off mechanical stress for the life of the system.
Key Electrical Performance at a Glance
Across the series, inductance values span 70 µH to 480 µH, with typical DCR as low as 1.2 mΩ to minimize conduction losses. Common mode impedance ranges from 540 Ω to 3790 Ω at 1 MHz, 345 Ω to 1920 Ω at 10 MHz, and 220 Ω to 410 Ω at 100 MHz, giving engineers broad options for filtering across the frequency spectrum. Heat rating current reaches 7 A to 20 A for an approximate 40 °C temperature rise, and 10 A to 30 A for a 100 °C rise, while maximum leakage inductance is held between 1.7 µH and 11.5 µH. Between coils, the devices withstand 1500 VDC, providing the isolation margin modern high-voltage inverters and on-board chargers demand.
Flexible Mounting: SMD and Through-Hole Options
Design teams can choose surface-mount or through-hole mounting options to match their assembly strategy. Devices with surface-mount terminations ship in tape-and-reel packaging and are fully compatible with automated pick-and-place assembly, increasing flexibility in board layouts and keeping placement costs low. Through-hole versions suit applications where maximum mechanical anchoring is preferred, such as high-vibration industrial equipment.
Where the Vishay Common Mode Chokes Fit Best
Vishay positions the ICMS2321 family squarely at the heart of modern power conversion. Typical uses include DC/DC converters, high-voltage inverters, EMI filters, and high-current filters for noise suppression in motor control and other circuitry. In the automotive space, the AEC-Q200-qualified ICMS2321-1A is an ideal fit for on-board chargers, where thermal endurance, vibration resistance, and long-term reliability are mandatory. Energy and industrial systems, from string inverters to motor drives, benefit from the same rugged performance in commercial grade.
Automotive Qualification and Green Compliance
The ICMS2321-1A carries AEC-Q200 qualification, the industry’s benchmark stress-test standard for passive components destined for automotive environments, while the ICMS2321-10 serves commercial programs. Both devices are RoHS-compliant, halogen-free, and Vishay Green, supporting sustainability targets and simplifying environmental compliance. For projects with special needs, Vishay offers customizable inductance, impedance, DCR, and current ratings, turning a catalog part into a tailored solution.
Availability, Datasheets, and Support
Samples and production quantities of both the ICMS2321-10 and ICMS2321-1A are available now, with lead times of 12 weeks. Datasheets can be accessed on the Vishay website via product pages 34675 (ICMS2321-10) and 34702 (ICMS2321-1A), with regional contact support provided across the Americas, Europe, and Asia/Pacific. This quick sampling-to-production path helps engineers move from evaluation to volume manufacturing without supply-chain surprises.
Frequently Asked Questions (FAQs)
What are Vishay’s new low-profile common mode chokes?
The ICMS2321-10 (commercial) and ICMS2321-1A (automotive grade) are self-shielded common mode chokes combining a heat rating current up to 30 A with 1500 VDC coil-to-coil withstand voltage.
What temperature can they operate at?
Up to +150 °C, with an enhanced core design that maintains performance and saturation current at high temperatures.
Is an automotive-qualified version available?
Yes. The ICMS2321-1A is AEC-Q200 qualified for automotive applications such as on-board chargers.
What mounting options are offered?
Surface-mount and through-hole. SMD versions come in tape-and-reel packaging compatible with automated pick-and-place assembly.
Final Thoughts: Small Footprint, Serious Power Handling
With high current capability, extreme thermal endurance, and flexible mounting, the new Vishay common mode chokes answer the twin pressures of shrinking board space and growing power density in automotive and industrial electronics. As electrification accelerates, components like the ICMS2321 family will play a quiet but essential role in keeping power systems clean, efficient, and reliable. For more coverage on passives, power electronics, and new component launches, keep following aarokatech.com.
