What this OptiMOS 5 part is and where it fits
The Infineon BSZ010NE2LS5ATMA1 is an N-channel power MOSFET from the OptiMOS™ 5 family, built on a metal-oxide trench technology. It handles a 25 V drain-to-source voltage and delivers up to 40 A continuous drain current at the case (Tc), with a 32 A rating at ambient (Ta). The headline number is the 1 mOhm maximum on-resistance at 10 V gate drive and 20 A — that milliohm figure keeps conduction losses low in a 12 V or 5 V rail, which is exactly where this part gets used: synchronous buck converters, load switches, battery protection, and OR-ing diodes in telecom or industrial gear. The junction temperature range of -55°C to 150°C means it can sit in an engine bay or a cold outdoor enclosure without derating surprises.
Package and mounting
At 20 A and 10 V gate drive, the drain-to-source resistance is guaranteed at 1 mOhm max. The PG-TSDSON-8-FL package can sink conduction loss to the PCB copper through its exposed pad.
Package and mounting — PG-TSDSON-8-FL
The 8-PowerTDFN case (Infineon calls it PG-TSDSON-8-FL) is a surface-mount package with a large drain pad on the bottom. That pad is the primary thermal path — it needs a good solder joint to a copper plane on the PCB, preferably with thermal vias to inner layers. The part is rated for 2.1 W dissipation in still air at the board level and 69 W when the case is held at 25°C, so the board layout determines how much current you can actually push. For a 40 A design, expect a multi-layer board with at least 2 oz copper and a dedicated thermal land. The package is compatible with standard reflow profiles; no special handling beyond normal MSL precautions.
Lifecycle and sourcing posture
The BSZ010NE2LS5ATMA1 carries an Active product status from Infineon and is ROHS3 compliant. No last-time-buy or NRND flags are on record.