ROHM Begins Mass Production of Wide-SOA MOSFET for Automotive Safety Circuits

Kyoto-based ROHM has launched volume production of a 100V MOSFET with industry-leading safe operating area tolerance, targeting airbag and seatbelt drive circuits.

KYOTO — ROHM Corporation began mass production in June of a 100V automotive MOSFET that delivers five times the safe operating area (SOA) tolerance of comparable devices, addressing high-power pulse loads in safety-critical circuits.

The chip, packaged in the industry-standard 5060 footprint, suppresses secondary breakdown across a wide voltage range — critical for airbag inflator ignition, seatbelt pretensioner drives, and battery cutoff pyro-fuse circuits where instantaneous high current spikes occur. Sample pricing is ¥450 (about $3) per unit, and the part is AEC-Q101 qualified. ROHM is developing two larger variants — an HPLF8080 (8.0 × 8.0 mm) and a TOLG leaded package (9.9 × 11.7 mm) — to extend the Wide-SOA lineup.

Key specifications

• N-channel, VDS 100V, ID 120A continuous
• On-resistance: 4.9 mΩ typical (6.3 mΩ max) at VGS = 10V
• SOA tolerance: VDS = 100V, pulse width = 100 μs
• Drop-in compatible with existing 5060 layouts

Why it matters: ROHM’s Wide-SOA technology, previously adopted by cloud platform operators for AI server power supplies, now addresses automotive Tier-1 demand for higher voltage and transient robustness as electrification raises system stress. The device is available now through ROHM Online Store, Corstaff Online, and Arrow.com.