The Siemens 5SY3106-7 is a 1-pole miniature circuit breaker from the SENTRON 5SY3 family, rated 6 A at 400 V AC with a C-curve trip characteristic. The 18 mm width per pole (1 width unit) means it occupies minimal rail space — useful when retrofitting into an existing sub-distribution board where every slot counts.
Breaking capacity and compliance — what the ratings mean
This breaker carries a 4.5 kA rated breaking capacity per EN 60898 and 6 kA per IEC 60947-2 at 400 V AC. The EN 60898 figure governs residential and light commercial installations; the higher IEC 60947-2 rating applies when the breaker is used in industrial control panels where the prospective fault current can be higher. It also carries a 5 kA rating per UL 1077 and CSA C22.2 No.235 for North American acceptance.
The 18 mm width per pole matches standard comb-busbar pitch.
