This part is a kind of semiconductor called FCH20A15.

Function of this product has Schottky Barrier Diode.

Manufacturers : Nihon Inter Electronics

Image and pinout :

Some of the text within the PDF file :

www.DataSheet.co.kr SBD T y p e : FCH20 FCH20A 20A15 OUTLINE DRAWING FEATURES *TO-220AB Case *Fully Molded *Dual Diodes – Cathode Common *Low Forward Voltage Drop *High Surge Capability *Tj=150 °C operation Maximum Ratings Rating Repetitive Peak Reverse Voltage Average Rectified Output Current RMS Forward Current Surge Forward Current Operating JunctionTemperature Range Storage Temperature Range Mounting torque Approx Net Weight: 1.75g Symbol VRRM IO IF(RMS) IFSM Tjw Tstg Ftor 180 20 FCH20A15 150 50 Hz Full Sine Wave Tc=121°C Resistive Load 22.2 50Hz Full Sine Wave ,1cycle Non-repetitive -40 to +150 -40 to +150 recommended torque = 0.5 Unit V A A A °C °C N•m Electrical • Thermal Characteristics Characteristics Peak Reverse Current Peak Forward Voltage Thermal Resistance [ ... ]

FCH20A15 PDF Datasheet Download