MALVERN, Pa. — Vishay Intertechnology has introduced two new IHDM edge-wound, through-hole inductors in the 1107 case for commercial applications with soft saturation current to 422 A. Featuring a powdered iron alloy core technology, the Vishay Custom Magnetics IHDM-1107BBEV-20 and IHDM-1107BBEV-30 provide stable inductance and saturation over a demanding operating temperature range from -55 °C to +180 °C with low power losses and excellent heat dissipation.
The edge-wound coil provides low DCR down to 0.25 mΩ, which minimizes losses and improves rated current performance for increased efficiency. Compared to competing ferrite-based solutions, the IHDM-1107BBEV-20 and IHDM-1107BBEV-30 offer 30 % higher rated current and 30 % higher soft saturation current levels that are stable at continuous operating temperatures to +180 °C. The inductors’ soft saturation provides a predictable inductance decrease with increasing current, independent of temperature.
With an operating voltage up to 350 V, the devices are ideal for DC/DC converters, inverters, differential mode chokes, and filters for motor and switching noise suppression in high current, high temperature applications, including industrial, medical, and military systems. The inductors are available with a selection of two core materials for optimized performance depending on the application.
Standard terminals for the IHDM-1107BBEV-20 and IHDM-1107BBEV-30 are stripped and tinned for through-hole mounting. Vishay can customize the devices’ performance — including inductance, DCR, rated current, and voltage rating — upon request. Customizable mounting options include bare copper, surface-mount, and press fit. To reduce the risk of whisker growth, the inductors feature a hot-dipped tin plating. The devices are RoHS-compliant, halogen-free, and Vishay Green.
Device Specification Table:
| Part number | IHDM-1107BBEV-20 | IHDM-1107BBEV-30 |
| Inductance (µH) | 0.47 to 7.5 | 0.68 to 12.0 |
| DCR typ. (mΩ) | 0.25 to 2.17 | |
| DCR max. (mΩ) | 0.30 to 2.60 | |
| Heat rating current typ. (A)(1) | 31 to 128 | 35 to 125 |
| Saturation current typ. (A) | 96 to 343(2) / 118 to 422(3) | 49 to 202(2)/ 61 to 248(3) |
| SRF typ. (MHz) | 29 to 217 | 21 to 181 |
(1) DC current (A) that will can an approximate ΔT of 40 °C
(2) DC current (A) that will cause L0 to drop approximately 20 %
(3) DC current (A) that will cause L0 to drop approximately 30 %
Samples and production quantities of the new inductors are available now, with lead times of 12 weeks.
