500 V, 4.8 A CoolMOS CE in a compact SOT223
It packs a 1.4 Ohm maximum on-resistance — specified at 900 mA drain current with 13 V gate drive — into the PG-SOT223-3 surface-mount footprint. The 150°C maximum junction temperature gives headroom for hot environments like enclosed industrial PSUs or LED drivers.
The 1.4 Ohm Rds(on) at 13 V gate drive is the figure to use for conduction-loss calculations at the nominal operating point. At 900 mA, that is about 1.1 W of conduction loss — well within the 5 W package limit, but the junction temperature rise will cut into that margin as ambient climbs. The total gate charge of 8.2 nC at 10 V means a modest gate driver can switch this FET at 100 kHz with under 1 mA average drive current; switching losses stay low enough for most flyback and single-switch forward topologies. Input capacitance is 178 pF at 100 V drain bias — a light load on the driver, and the Miller plateau will be short, which helps keep the turn-on and turn-off delays in the tens of nanoseconds range. For a 100 kHz hard-switched design, the crossover losses will be dominated by the output capacitance (Coss) rather than the gate charge, so plan for a snubber or a valley-switching controller if efficiency targets are tight.
Package thermal reality — SOT223 at 5 W
The PG-SOT223-3 package is rated for 5 W total power dissipation at the case. That is a firm ceiling — the copper pad area on the PCB under the drain tab sets the actual thermal resistance. For continuous operation at 4.8 A, the conduction loss alone will push past 5 W unless the Rds(on) is de-rated for temperature (it roughly doubles at 150°C junction). In practice, this part is run at 1-2 A continuous with good PCB heatsinking, or used in pulsed applications like inrush limiting. The 150°C ceiling is a hard stop — the plastic SOT223 will not survive sustained operation above that, and the solder joints fatigue faster at the high end of the range. Keep the junction below 125°C for reliability in long-life designs.
Sourcing and lifecycle posture
Infineon continues to manufacture the CoolMOS CE series in the SOT223 package. No known PCN on this specific variant; the date-code and marking traceability back to Infineon's fabs is clean through the authorized channel.