This part is a kind of semiconductor called 1N4007S.

Function of this product has Silicon Recrifiers.

Manufacturers : LGE

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Some of the text within the PDF file :

1N4001S-1N4007S 1.0 AMP. Silicon Recrifiers A-405/A-405F Features High efficiency, Low VF High current capability High reliability High surge current capability Low power loss ψ0.6mm leads Mechanical Data Cases: Molded plastic Epoxy: UL 94V-0 rate flame retardant Polarity: Color band denotes cathode High temperature soldering guaranteed: 260oC/10 seconds/.375”,(9.5mm) lead lengths at 5 lbs.,(2.3kg) tension Weight: 0.22 gram Dimensions in inches and (millimeters) Maximum Ratings and Electrical Characteristics Rating at 25 oC ambient temperature unless otherwise specified. Single phase, half wave, 60 Hz, resistive or inductive load. For capacitive load, derate current by 20% Type Number Symbol 1N 1N 1N 1N 1N 1N 1N Units 4001S 4002S 4003S 4004S 4005S 4006S 4007S Maximum Recurrent Pe [ ... ]

1N4007S PDF Datasheet Download