This part is a kind of semiconductor called KIA317PI.

Function of this product has 3-TERMINAL 1.5A POSITIVE ADJUSTABLE REGULATOR.

Manufacturers : KEC

Image and pinout :

Some of the text within the PDF file :

SEMICONDUCTOR TECHNICAL DATA KIA317F/PI BIPOLAR LINEAR INTEGRATED CIRCUIT 3-TERMINAL 1.5A POSITIVE ADJUSTABLE REGULATOR The KIA317F/FP/PI/S is adjustable 3-terminal positive voltage regulator capable of supplying in excess of 1.5A over a 1.25V to 37V output range. This is exceptionally easy to use and require only two external resistors to set the output voltage. Further, both line and load regulation are better than standard fixed regulators. FEATURES Adjustable output between 1.25V and 37V Guaranteed 1.5A output current Line regulation typically 0.001%/V Load regulation typically 0.1% 80dB ripple rejection (with Cadj) Internal thermal overload protection Internal short-circuit current limiting Output transistor safe-area compensation MAXIMUM RATINGS (Ta=25 ) CHARACTERISTIC Input-Ou [ ... ]

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