The Littelfuse SL1002A230SM is a 2-pole Gas Discharge Tube Arrester with a 230V rating and 5kA surge capability. It is designed for surface mount applications.
Bourns 2035-23-SM-RPLF is a 230V surface mount gas discharge tube (GDT) with 10kA impulse discharge current. It features 2-pole design and low capacitance for telecom applications.