The Siemens 5SY6025-7KL is a SENTRON miniature circuit breaker rated 25 A at 230 V AC, with a C-curve trip characteristic and a 6 kA breaking capacity per EN 60898. It's a 1P+N unit — switches the live and switches the neutral — in a single 18 mm width unit that snaps onto standard DIN rail.
At 18 mm wide (1 width unit), 90 mm tall, and 76 mm deep, it occupies the same footprint as every other 1P+N SENTRON 5SY6 MCB. Installation depth is 70 mm from the rail. The terminals accept solid or stranded copper up to 16 mm², and the tightening torque range is 17.7 to 22.1 lbf·in — standard for this class. The unit is sealable, which lets a panel builder or inspector lock the toggle position with a lead seal to prevent unauthorized switching.
Rated for ambient temperatures up to +55 °C and 95% humidity (periodic). Touch protection is built in — finger-safe terminals per the design.