This part is a kind of semiconductor called B140S.

Function of this product has Schottky Barrier Rectifiers.

Manufacturers : AXElite

Image and pinout :

Some of the text within the PDF file :

B1 40S Schottky Barrier Rectifiers Features ‧Guardring for overvoltage protection ‧Very small conduction losses ‧Low forward voltage drop ‧Component in accordance to RoHS 2002/95/EC Mechanical Data PRIMARY CHARACTERISTICS IF VRRM IFSM VF TJ max 1A 40V 30 A 0.50V 125°C ‧Cases: DO-41 ‧Case Material: Molded Plastic. UL Flammability Classification Rating 94V-0 ‧Terminals: Lead free Plating (Tin Finish) Solderable per MIL-STD-202, Method 208 ‧Polarity: Cathode Band ‧Weight: 0.318 grams (approximate) ™ ORDER/MARKING INFORMATION Order Information BXX X X X VÛmw`R•yÑb€ Top Marking Assembly Material Blank : G : Halogen and Lead Free Device Peak Current 1: 1A Voltage 40: 40V AXE Y W B1 40 S X X W : 01~26(A~Z) 27~52(a~z) Year : A = 2010 w.goftech.com Type S : DO-41 [ ... ]

B140S PDF Datasheet Download