This part is a kind of semiconductor called AM400N04-01B.

Function of this product has N-Channel MOSFET.

Manufacturers : Analog Power

Image and pinout :

Some of the text within the PDF file :

Analog Power N-Channel 40-V (D-S) MOSFET Key Features: • Low rDS(on) trench technology • Low thermal impedance • Fast switching speed Typical Applications: • Automotive Systems • DC/DC Conversion Circuits • Battery Powered Power Tools AM400N04-01B VDS (V) 40 PRODUCT SUMMARY rDS(on) (mΩ) 1.55 @ VGS = 10V 1.9 @ VGS = 4.5V ID (A) 400a ABSOLUTE MAXIMUM RATINGS (TA = 25°C UNLESS OTHERWISE NOTED) Parameter Symbol Limit Drain-Source Voltage VDS 40 Gate-Source Voltage Continuous Drain Current a Pulsed Drain Current b Continuous Source Current (Diode Conduction) a Power Dissipation a TC=25°C TC=25°C TC=25°C VGS ID IDM IS PD ±20 400 1200 400 300 Operating Junction and Storage Temperature Range TJ, Tstg -55 to 175 Units V A A W °C Maximum Junction-to-Ambient c Maxi [ ... ]

AM400N04-01B PDF Datasheet Download