This part is a kind of semiconductor called FCH20A10.

Function of this product has SBD.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

20A Avg. 100 Volts SBD FCH20A10 INSTANTANEOUS FORWARD CURRENT (A) AVERAGE REVERSE POWER DISSIPATION (W) 50 20 10 5 2 1 0 AVERAGE FORWARD POWER DISSIPATION (W) FORWARD CURRENT VS. VOLTAGE FCH20A10 (per Arm) Tj=25˚C Tj=150˚C 0˚ 180˚ θ CONDUCTION ANGLE 20 16 12 AVERAGE FORWARD POWER DISSIPATION FCH20A10 (Total) RECT 180˚ SINE WAVE 8 4 0.2 0.4 0.6 0.8 1.0 1.2 1.4 INSTANTANEOUS FORWARD VOLTAGE (V) 0 0 4 8 12 16 20 24 AVERAGE FORWARD CURRENT (A) PEAK REVERSE CURRENT (mA) PEAK REVERSE CURRENT VS. PEAK REVERSE VOLTAGE 50 Tj= 150 FCH20A10 (per Arm) 20 10 5 0 20 40 60 80 100 120 PEAK REVERSE VOLTAGE (V) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0 AVERAGE REVERSE POWER DISSIPATION FCH20A10 (Total) RECT 180˚ SINE WAVE 20 40 60 80 100 120 REVERSE VOLTAGE (V) 0˚ 180˚ θ CONDUCTIO [ ... ]

FCH20A10 PDF Datasheet Download