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The Phoenix Contact 2905251 is a Type 2 surge protection base element from the VALVETRAB MS product range. It is designed for 3-mode protection of 2-wire signals and features a remote indication contact for fault messaging.
Key electrical specifications include a nominal voltage of 5 V AC to 48 V AC, a maximum continuous operating voltage (UC) of 60 V, and a maximum continuous operating voltage (L-PE) of 230 V. The element has a maximum discharge current (Imax) of 20 kA (8/20 µs) across various configurations (L-N, L-PE, N-PE) and a nominal discharge current (In) of 10 kA (8/20 µs). The voltage protection level (Up) is rated at ≤ 700 V (L-N) and ≤ 1500 V (L-PE), with a response time of ≤ 25 ns.
Mechanically, the base element has dimensions of 99 mm height, 53.4 mm width, and 65.5 mm depth, with a horizontal pitch of 3 Div. It is designed for DIN rail mounting (35 mm) and features a two-section, divisible housing. The housing material is PBT/PA and it has a black color. The degree of protection is IP20.
Environmental conditions include an operating ambient temperature range of -40 °C to 80 °C and permissible humidity of 5% to 95%. The product also meets flammability rating UL 94 V0 and complies with standards EN 60664-1 and EN 61643-1. The country of origin is Germany.
The nominal voltage is 5 V AC to 48 V AC.
The maximum continuous operating voltage (UC) is 60 V.
The maximum discharge current (Imax) is 20 kA at 8/20 µs.
The voltage protection level (Up) is ≤ 700 V for L-N and ≤ 1500 V for L-PE.
The ambient temperature range for operation is -40 °C to 80 °C.
It is designed for DIN rail mounting (35 mm).
The flammability rating according to UL 94 is V0.