This part is a kind of semiconductor called SE115N.

Function of this product has Error Amplifier ICs.

Manufacturers : Sanken

Image and pinout :

Some of the text within the PDF file :

sError Amplifier ICs (SE series) Absolute Maximum Ratings (Ta=25°C) Part No. Collector-Ground Voltage VCGO (V) SE005N 012N 015N 024N 034N 040N 070N 080N 090N 105N 110N 115N 120N 125N 130N 135N 140N 150 20 –20 to +125 (TC) 50 12 Collector Current Ic (mA) Operating Temperature TOP (°C) Electrical Characteristics (Ta=25°C) Output Detection Voltage VS (V) 5.0± 0.1 12.0± 0.2 15.0± 0.2 24.0± 0.2 34.0± 0.3 40.0± 0.4 70.2± 0.8 80.2± 0.8 90.0± 0.8 105.2± 0.8 110.2± 0.8 115.2± 0.8 120.2± 0.8 125.2± 0.8 130.2± 0.8 135.2± 0.8 141.2± 0.8 High Vs Low Vs Remarks sVariable Voltage Detection Type Error Amplifier ICs Absolute Maximum Ratings (Ta=25°C) Part No. Collector-Ground Voltage VCGO (V) Collector Current Ic (mA) Operating Temperature TOP (°C) Electrical Characteristics (Ta=25 [ ... ]

SE115N PDF Datasheet Download