Siemens 5SX2116-7 is a T55-frame, 1-pole miniature circuit breaker designed for 230/400 V AC installations. It carries a rated current of 16 A and uses a C-curve thermal-magnetic trip, delivering a 6 kA short-circuit breaking capacity at 400 V. This device is part of the Siemens 5SX2 family and is specified as 1P for 50/60 Hz systems. Siemens lists the 5SX2116-7 as no longer available, with recommended replacements in the 5SY6116-7 or 5SL6116-7 families. Typical applications include providing overload and short‑circuit protection for individual branch circuits in low-voltage distribution panels.
