The TSJ-PoE Series surge suppressors are designed to protect equipment from transient over-voltages on Power over Ethernet applications. The suppression protects the Ethernet circuit by limiting the magnitude of transient over-voltages that are present on each pair relative to each other and relative to ground. 

Max Dimensions: (H x W x D) : 3.2 x 2.2 x 1.7"
Weight: 0.15lbs
Operating/Storage temperature: -40°F to 185°F (-40°C to +85°C) 
Relative Humidity: 99% (non-condensing)