This part is a kind of semiconductor called RF1601.

Function of this product has Fast recovery Diodes.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

RF Diodes 1series Fast recovery Diodes (Silicon Epitaxial Planar) RF 1 series zExternal dimensions (Unit : mm) CPD 1.5 5.5 2.3 0.5 zApplications High frequency rectification zFeatures 1) Ultra low VF very fast recovery 2) Fast recovery 3) Low switching loss 4) Standard package TO-220FN, CPD 5.6 2.3 2.3 0.55 1.2 (1) Anode (2) Cathode (3) Anode (1) (2) (3) TO-220FN 10.0 φ3.2 4.5 15.0 12.0 8.0 5.0 1.2 1.3 0.8 (1) Anode (2) Cathode (3) Anode 14.0 5.5 2.8 2.54 (1)(2)(3) 2.54 0.75 2.6 TO-220FN Center tap type cathode common, Dual elements VR IO Ultra low VF type FRD Fast recovery type FRD CPD Center tap type cathode common, Dual elements VR IO Ultra low VF type FRD Fast recovery type FRD 200V Dual Single − − − − − − − − 200V Dual Sin [ ... ]

RF1601 PDF Datasheet Download