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The Phoenix Contact 2856139 is a surge protection base element for PT plugs, designed for signal circuits grounded on one side. It mounts on a standard 35 mm DIN rail (NS 35/7.5 and NS 35/15) and has a housing width of 17.7 mm.
This base element features a two-section, divisible design for maximum ease of maintenance, allowing the plug to be checked with CHECKMASTER when installed. It provides consistent plug-in signal circuit protection for two conductors with a common reference potential. The impedance-neutral disconnection of the plug facilitates testing and maintenance.
Key technical specifications include a nominal current of 300 mA, screw connection terminals (M3 thread), and support for conductor cross-sections ranging from 0.2 mm² to 2.5 mm² for stranded wire and 0.2 mm² to 4 mm² for solid wire. The operating temperature range is -40 °C to 85 °C, and it has an IP20 degree of protection. The flammability class is V0 according to UL 94.
This product is manufactured in Germany and comes with UL Listed, GOST, and GL approvals, as well as Ex Approvals including UL Listed, cUL Listed, and cULus Recognized.
-40 °C to 85 °C
300 mA
DIN rail: 35 mm
V0 according to UL 94
Screw connection with M3 screw terminals
IP20
17.7 mm width, 89.8 mm height, 52 mm depth