This part is a kind of semiconductor called AVRC-18S.

Function of this product has (AVRC-xS) Chip Varistor.

Manufacturers : Amotech

Image and pinout :

Some of the text within the PDF file :

Advanced Material On TECHnology - AMOTECH DataShee DataSheet 4 U .com CONTENTS PRODUCTS OVERVIEW Compact Array (Space Saved) / AVSC F Series (4_Element) Compact Array (Space Saved) / AVSC E Series (8_Element) General Array / AVNC Series (2_Element) General Array / AVNC Series (4_Element) R-C Type EMI-ESD Filter / AVRC Series Feed Thru Type EMI-ESD Filter / AVFC Series High Power / AVL Series Low Capacitance / AVLC Series Terminology Selection Guidelines & Application Field Tape and Reel Specification & Soldering Recommendation 1 2 3 4 5 6 8 10 12 13 14 15 etcom DataShee Transient Voltage Suppressors Applications Typical Circuits Requiring Protection 16 D [ ... ]

AVRC-18S PDF Datasheet Download