600 V N-channel in DPAK — what the ratings tell you
The STMicroelectronics STD6NM60N is a 600 V N-channel power MOSFET from the MDmesh™ II series, built for high-voltage switched-mode power supplies, flyback converters, and PFC stages. The 920 mOhm maximum on-resistance at 2.3 A, 10 V drive sets the conduction-loss baseline: at full rated current expect about 4.2 W dissipation in the channel alone, which the 45 W package limit can handle with adequate board-level heat sinking.
Obsolete — how to source STD6NM60N now
For BOM lines that need this exact part number, supply runs through independent distribution: surplus inventory, new-old-stock, and broker-sourced lots. If your design can accommodate a pin-compatible alternative, the MDmesh™ II family includes several 600 V N-channel DPAK devices with similar footprints and drive requirements — evaluate gate charge, RDS(on), and current rating against the load budget before swapping.
MDmesh™ II — what the technology means for switching loss
The MDmesh™ II structure reduces the gate-drain capacitance (Crss) compared to planar MOSFETs, which directly shrinks the Miller plateau duration during hard switching. With 420 pF input capacitance at 50 V drain bias and 13 nC total gate charge, the STD6NM60N turns on and off cleanly in flyback and quasi-resonant converters operating in the 60–150 kHz range.
Temperature range and junction limits
The ±25 V maximum gate-source rating provides margin for ringing on long gate traces, but a gate-source clamp or series resistor is still prudent in noisy layouts.