The BUY25CS45B-01 (P) from Infineon Technologies is a MOSFET with Continous Drain Current 45 A, Drain Source Resistance 47 to 90 Milliohm, Drain Source Breakdown Voltage 250 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.5 to 5 V. Tags: Through Hole. More details for BUY25CS45B-01 (P) can be seen below.