What this NPN transistor brings to a switching or linear design
The FZT1049ATA is an NPN transistor in a SOT-223-3 surface-mount package, rated for a continuous collector current of 5 A and a collector-emitter breakdown voltage of 25 V. The 180 MHz transition frequency means it can handle switching in the low-MHz range without excessive switching loss.
Thermal and saturation performance for real loads
Maximum power dissipation is 2.5 W — in a SOT-223 footprint, that demands a decent copper area on the PCB to keep the junction below the 150°C absolute maximum. The Vce saturation voltage is specified at 330 mV max with a 50 mA base drive and 5 A collector current, so conduction loss at full load is about 1.65 W — within the 2.5 W budget if the board can sink the heat.
Sourced to order against an RFQ; availability and pricing confirmed at quote time.