30 V, 80 A N-channel in TO-220 — what the ratings mean
The STP85N3LH5: The 14 nC gate charge at 5 V keeps switching losses manageable in a 100–200 kHz SMPS or a motor-drive output stage. The TO-220 through-hole package handles 70 W dissipation with an adequate heatsink — the junction temperature rating goes to 175 °C, so the thermal design needs proper derating above 85 °C ambient.
Obsolete — sourcing path for production fills
For BOM lines that still call out this exact part, the available channel is independent distribution — new-old-stock or surplus lots sourced against an RFQ. A buyer filling a production gap should verify date-code consistency and request a C of C, especially if the lot is several years past the last-time-buy window. The part is not in active factory production, so the procurement decision is about qualifying surplus inventory, not placing a factory order.
Package and mounting — through-hole TO-220
The tab is electrically live — an insulating pad and washer are needed if the heatsink is grounded. The package ships in Tube form, not tape-and-reel, which matters for automated assembly line feeding.