ST Introduces STripFET F8 MOSFET Series for Automotive

Why It Matters

The ultra‑low on‑resistance and reduced silicon footprint cut conduction losses, directly boosting vehicle efficiency and range, while the compact package frees PCB space for tighter designs. This accelerates adoption of advanced battery‑management and power‑distribution architectures across the automotive sector.

Key Takeaways

• 0.59 mΩ RDS(on) at 420 A, 40 V.
• PowerFLAT 5×6 package reduces PCB area.
• AEC‑Q101 qualified, 175 °C max temperature.
• Improves battery management and power distribution efficiency.
• Future variants up to 780 A, 0.35 mΩ RDS(on).

Pulse Analysis

Automotive power electronics are under pressure to squeeze every watt of efficiency from the drivetrain, especially as electric‑vehicle ranges climb and regulatory standards tighten. Low‑RDS(on) MOSFETs have become a cornerstone of this push, and STMicroelectronics’ Smart STripFET F8 series arrives at a moment when manufacturers demand both higher current capability and smaller silicon footprints. By leveraging a modified trench‑gate architecture, the new devices achieve sub‑milliohm on‑resistance while maintaining robust thermal pathways, allowing designers to lower conduction losses without inflating board real‑estate.

Beyond the raw specifications, the STripFET F8 line integrates practical features that streamline automotive assembly. The PowerFLAT 5×6 form factor occupies less PCB area than traditional TO‑247 packages, and wettable flanks simplify optical inspection during high‑volume production. Coupled with ST’s STi²Fuse VIPower gate drivers, engineers can embed configurable protection for traces, connectors, and wiring, creating a more resilient power‑distribution network. The devices’ AEC‑Q101 qualification and 175 °C operating ceiling meet the stringent reliability criteria of modern vehicles, from power‑train control units to battery‑management systems.

The market impact is immediate: reduced conduction losses translate to lower heat generation, which in turn improves overall vehicle efficiency and can extend driving range by a measurable margin. Designers gain flexibility to consolidate functions into smaller modules, accelerating the shift toward integrated power‑electronics architectures. As ST rolls out additional variants—some delivering 780 A with 0.35 mΩ RDS(on)—the competitive landscape for automotive MOSFETs will tighten, prompting rivals to pursue similar silicon‑efficiency breakthroughs. For OEMs and Tier‑1 suppliers, the STripFET F8 series offers a tangible path to meet next‑generation EV performance targets while controlling cost and footprint.