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Vishay IHDV 1.5 kV Inductors for Automotive and High-Voltage Power Design
Vishay IHDV 1.5 kV Inductors for Automotive and High-Voltage Power Design
Vishay has introduced the first four devices in its IHDV high-voltage power-inductor line: the automotive-grade IHDV-0808AC-3A and IHDV-1008BB-3A, plus the commercial IHDV-0808AC-30 and IHDV-1008BB-30. The release is aimed at automotive, energy, and industrial power systems that need a magnetic component with a 1.5 kV isolation rating while keeping the inductor footprint under control.
The engineering point is not simply the isolation number. In a high-voltage filter, the inductor has to hold useful inductance as load current rises, tolerate in-rush events, fit the temperature envelope, and preserve the required barrier on the assembled PCB. The IHDV launch combines a PET coilform insulator with a powdered iron alloy core, so the component selection review needs to consider isolation, soft saturation, filtering frequency, mechanical format, and qualification status together.
What the IHDV release includes
Vishay offers two package families. The 0808 format measures 20 mm x 14 mm x 14 mm and uses a compact surface-mount footprint. The 1008 format measures 25 mm x 20 mm x 23 mm and uses through-hole terminations for greater mechanical strength in rugged equipment. The source release identifies the smaller 0808 footprint as roughly one-third of the 1008 model volume.
| Selection point | IHDV information to use | What the design team should confirm |
|---|---|---|
| Isolation barrier | PET coilform insulator supports a 1.5 kV isolation voltage. | System working voltage, test method, PCB creepage and clearance, contamination environment, and the final safety requirement. |
| Package choice | 0808: 20 mm x 14 mm x 14 mm SMD. 1008: 25 mm x 20 mm x 23 mm through-hole. | Board area, height, assembly method, vibration exposure, inspection access, and solder-joint stress. |
| Temperature and core behavior | Continuous operation to +180 °C with soft saturation from a powdered iron alloy core. | Core loss, copper loss, DC bias, enclosure temperature, and the real current waveform rather than room-temperature headline values. |
| Automotive qualification | The IHDV-0808AC-3A and IHDV-1008BB-3A are identified as AEC-Q200 qualified. | The exact ordering code and project-specific qualification documents. The commercial -30 versions should not be assumed equivalent. |
Where the impedance and soft saturation help
For noise filtering, Vishay specifies more than 1 kOhm impedance above 10 MHz. The 0808 models are stated at 1 kOhm at a peak frequency of 80 MHz, while the 1008 models reach 2.8 kOhm at 25 MHz. Those figures make the family relevant when a converter needs both energy-storage behavior at its operating current and attenuation of higher-frequency noise, but they do not remove the need to model the complete input or output network.
Soft saturation is equally important in a high-voltage power stage. An inductor that changes inductance abruptly near a transient can shift ripple-current behavior at the wrong moment. Vishay says the IHDV devices tolerate transient in-rush current up to five times their heat-rating current. That is a useful design margin to evaluate, not a substitute for checking the exact current pulse, duty cycle, temperature rise, and inductance-versus-current curve in the datasheet.
Design-in checks for the four new devices
- Start with the required isolation level and the complete insulation system, including the PCB and the installed mechanical environment.
- Select the exact 0808 or 1008 part after comparing current, inductance, DC resistance, saturation behavior, and temperature rise for the intended topology.
- Use the automotive -3A variants only when the required qualification evidence matches the program; do not infer AEC-Q200 status from the IHDV family name.
- Check the 0808 surface-mount land pattern and reflow constraints separately from the 1008 through-hole mounting and mechanical-retention requirements.
- Measure conducted and radiated noise with the final capacitor network, cable arrangement, shielding, and converter switching behavior in place.
Typical fit in a high-voltage power BOM
Vishay lists on-board chargers, battery-charging circuits, power-factor-correction stages, and high-voltage DC battery filtering as typical applications. In those circuits, an IHDV selection is strongest when the electrical and mechanical constraints are reviewed as a single decision: the smaller 0808 option favors board-density and automated assembly, while the 1008 through-hole form can be more appropriate where vibration and retention dominate.
Engineers should also separate a high-voltage inductor decision from a general low-voltage rail decision. A compact isolated transformer such as the TDK E13 EM gate-drive transformer series addresses a different role around an isolation boundary. For the surrounding converter, the filtering and current path still need a coherent power-stage review. The broader choices are discussed in Doing solid power conversion for a connected device, while onsemi GaNEXUS GaN power devices illustrate why switching speed and layout can change the filtering problem.
Source and procurement confirmation
Vishay announced the IHDV line on June 18, 2026. The official source is Vishay's IHDV high-voltage power-inductor release. Before a design is frozen, confirm the latest datasheet for the exact IHDV ordering code, qualification evidence, insulation test conditions, allowable current, thermal data, package drawing, and the program's approved-vendor requirements.
