This part is a kind of semiconductor called 1R5GU41.

Function of this product has RECTIFIER.

Manufacturers : TAYCHIPST

Image and pinout :

Some of the text within the PDF file :

SWITCHING TYPE POWER SUPPLY APPLICATION FEATURES D Average Forward Current D Reverse Recovery Time D Very Fast Reverse-Recovery Time 1R5GU41 400V 1.5A MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS CHARACTERISTIC SYMBOL RATING UNIT Repetitive Peak Reverse Voltage Average Forward Current V RRM I F(AV) 400 1.5 V A Peak One Cycle Surge Forward Current(Non-Repetitive) Junction Temperature Storage Temperature Range I FSM Tj Tstg 60(50Hz) 66(60Hz) -40~150 -40~150 A °C °C ELECTRICAL CHARACTERISTICS CHARACTERISTIC SYMBOL Peak Forward Voltage VFM Repetitive Peak Reverse Current I RRM TEST CONDITION I FM =1.5A VRRM =400V Reverse Recvery Time Forward Recovery Time Thermal Resistance Thermal Resistance t rr I F =1A, di/dt=-30A/us t fr I F =1A R th(j-a) Junc [ ... ]

1R5GU41 PDF Datasheet Download