Kingtronics sell 2-Electrode arresters and 3-Electrode arresters.
Including 2 Surge Arresters 8*6mm, 2 Surge Arresters SMD4532,2 Surge Arresters SMD5042,3 Surge Arresters 8*10mm,3 Surge Arresters SMD5076

Today we recommend our SKT-3R-SMD5076 SMD Gas Discharge Tube to you

Key Characteristics 
● DC Breakdown Voltage (@100V/S) : 75~1000V
● Tolerance of DCBV : ±20%
● Impulse discharge current (8/20 μs) : Max. 5KA 
● Alternating discharge current (@50Hz) (A): Max. 5 A 
● Insulation resistance min.: 1 GΩ 
● Electrode Capacitance (@1MHz) (pF) min: ≤1.5pF

Features
●Size Designφ5 × 5 × 7.6mm
●Fast Response and Long Service Life
● Excellent Current Handing Capability 5,000A @ 8/20μs
● Stable performance over life
● Very low capacitance and Insertion Loss
● High insulation resistance 
●Reliable to Protect Electrostatic Surge
●Moisture sensitivity level: Level 1
● RoHS-compatible

Applications
●Telephone/fax/modem protection 
●Signal line protection
●Protective circuits
●3-point protection
●5- point protection
●Cable TV/coaxial cable protection
●AC line protection

Kindly please check more items and datasheet from below links:
Product link:  http://www.kingtronics.com/pdf/3-Surge-Arresters-SMD5076.pdf