Last-Buy lifecycle — plan your LTB window now
Murata lists the DFEH12060D-1R0M=P3 as Last Buy. That means the manufacturer has stopped production and the remaining inventory is the last opportunity to secure this part for your BOM. For a power inductor in an automotive-grade design, a Last Buy status triggers an immediate LTB (last-time-buy) procurement action. Once the existing stock clears, the only channel will be surplus or broker inventory, with no factory warranty. The sourcing desk should quote the required lifetime quantity now.
1 µH, 20 A — the power-stage fit criteria
This is a 1 µH shielded power inductor rated for 20 A continuous with a saturation current of 25 A. The 2.9 mOhm max DCR keeps conduction losses low — at 20 A the I²R loss is about 1.16 W, which the 155°C-rated iron-powder core and package must dissipate. The 20 A rating is the thermal limit at the specified ambient; the 25 A saturation figure is the magnetic core's hard ceiling before inductance collapses. The 100 MHz test frequency for inductance is a datasheet convention for this core material — in a buck converter switching at 400 kHz to 2 MHz, the effective inductance will be close to the 1 µH value because the iron-powder core maintains permeability well into the MHz range. The shielded construction reduces radiated EMI, which matters when the inductor sits near sensitive analog or RF stages on the PCB.
AEC-Q200 — the automotive reliability gate
AEC-Q200 qualification means this inductor passed the passive-component stress tests defined by the Automotive Electronics Council: temperature cycling, mechanical shock, vibration, solder heat resistance, and high-temperature storage. The -40°C to 155°C operating range covers under-hood and transmission-mounted electronics where ambient temperatures exceed 125°C. An OEM auditor will expect the AEC-Q200 test report and PPAP documentation — Murata provides these through its standard qualification package. The iron-powder core material is chosen for its low core loss at high ripple currents and its stable saturation behaviour over temperature. Unlike ferrite, iron powder does not saturate abruptly, so the 25 A saturation current is a soft limit — inductance gradually rolls off, giving the downstream converter a graceful overload response.
Package and assembly — nonstandard footprint
The inductor comes in a nonstandard surface-mount package measuring 13.00 mm x 12.60 mm with a 6.00 mm seated height. There is no standard JEDEC outline — the PCB footprint must match the Murata-recommended land pattern in the DFEH12060D series drawing. The part is supplied on tape-and-reel for automated pick-and-place, and the ±20% tolerance on 1 µH is typical for power inductors where the DC bias variation and temperature drift dominate the effective inductance.