600 V blocking, 7 A continuous — the power-switch spec that matters
The STP9NK60Z: 600 V drain-to-source blocking and 7 A continuous drain current suit offline flyback converters and PFC boost stages.
Total gate charge is 53 nC at 10 V.
Through-hole TO-220 — the repair-bench favourite
The STP9NK60Z comes in a TO-220-3 through-hole package — the same footprint that's been a staple on power boards for decades. For the board-level repair tech, that means a clean desolder-and-replace job with a standard iron and a solder sucker; no hot-air rework station needed. The tab is the drain, so the heatsink pad in the layout must be isolated or tied to the drain rail. Maximum power dissipation is 125 W at the case, but that's at 25°C case — real-world derating means a heatsink sized for the actual dissipation, not the datasheet ceiling.
For the BOM cost engineer, that means no single-source risk from obsolescence on this line. The base product number is STP9NK60, so any suffix variants (Z, FP, etc.) share the same die platform; the Z suffix indicates the SuperMESH™ generation.