25A DIN rail breaker from the Siemens 5SQ11 series
The Siemens 5SQ11-220-L25 is a 25A DIN rail mount circuit breaker from the 5SQ11 series, a standard component for branch circuit protection in control panels and distribution boards. The 25A rating tells you the continuous current it can carry without tripping under normal conditions — sized for a moderate load like a small motor group, a lighting sub-panel, or a bank of contactors.