60V, 28A N-channel switch in DPAK — where this part lands in the BOM
The STMicroelectronics STD30NF06T4 is a 60V, 28A N-channel power MOSFET from the STripFET™ II generation, housed in a surface-mount DPAK (TO-252) package. It is a general-purpose switching device for DC-DC converters, motor drives, load switches, and power management in industrial and automotive-adjacent applications. The headline specs — 28 mOhm max on-resistance at 10V gate drive and a 175°C maximum junction temperature — define its conduction loss and thermal headroom in a 12V or 24V bus design.
28 mOhm at 15A — the conduction loss anchor
The 28 mOhm Rds(on) maximum at 15A drain current with a 10V gate drive sets the I²R loss for the steady-state on-period. In a 10A load, that's about 2.8W conduction loss at the FET — enough to need the DPAK tab soldered to a reasonable copper area on the PCB. The gate drive requirement is 10V for the rated on-resistance; the 4V threshold at 250 µA means the device will start conducting at logic-level voltages, but the Rds(on) will be significantly higher below 10V. This is a standard-gate-threshold part, not a logic-level FET.
A maximum gate charge of 58 nC at 10V gate voltage is moderate for a 60V, 28A device. The input capacitance is 1750 pF at 25V Vds. Together, these numbers tell the designer that a standard gate-driver IC with 1A to 2A peak source/sink capability will switch this FET in the 50–100 ns range, keeping switching losses manageable in the 50–200 kHz range. The 1750 pF input capacitance also means the gate-drive power per cycle is modest, around 0.6 µJ at 10V, so the driver's average dissipation is not a concern at typical switching frequencies.
Thermal capability and environment — 175°C junction is the differentiator
The 175°C TJ max is typical for automotive-grade power MOSFETs and suits under-hood, motor-drive, and high-ambient industrial enclosures where the junction sees sustained thermal cycling. The 70W power dissipation at case temperature (Tc) is the package limit; real-world dissipation will be lower with the DPAK on a standard FR-4 footprint.
Package and mounting — DPAK for automated assembly
The STD30NF06T4 comes in the DPAK (TO-252) surface-mount package, also designated as TO-252-3, DPak (2 Leads + Tab), SC-63. The mounting type is surface mount, so it flows through standard reflow profiles.