This part is a kind of semiconductor called KIA78R33PI.

Function of this product has (KIA78R25PI - KIA78R37PI) Bipolar Linear Integrated Circuit.

Manufacturers : KEC

Image and pinout :

Some of the text within the PDF file :

SEMICONDUCTOR TECHNICAL DATA 4 TERMINAL LOW DROP VOLTAGE REGULATOR The KIA78Rᴧᴧ series are Low Drop Voltage Regulator suitable for various electronic equipments. It provides constant voltage power source with TO-220 4 terminal lead full molded PKG. The Regulator has multi function such as over current protection, overheat protection and ON/OFF control. KIA78R25PI~KIA78R37PI BIPOLAR LINEAR INTEGRATED CIRCUIT A C O E L V T V S L K U R H FEATURES ᴌ1.0A Output Low Drop Voltage Regulator. ᴌBuilt in ON/OFF Control Terminal. ᴌBuilt in Over Current Protection, Over Heat Protection Function. P 1 2 3 4 M D DIM MILLIMETERS _ 0.20 A 10.00 + _ 0.20 15.00 + B _ 0.20 C 2.70 + _ 0.10 D 0.60 + _ 0.20 E Φ3.20 + _ 0.10 3.50 + F _ 0.20 15.70 + G _ 0.10 H 0.40 + 14.3 [ ... ]

KIA78R33PI PDF Datasheet Download