The Siemens 5SL6101-7YA is a SENTRON miniature circuit breaker, 1-pole, C-curve, rated 1 A with a 6 kA breaking capacity per IEC/EN 60898-1 at 230/400 V AC. The C-curve trips between 5 and 10 times rated current, so this 1 A unit clears overloads in the 5–10 A range — appropriate for lighting circuits, control transformers, or small resistive loads where moderate inrush is expected.
Mounting position is any orientation. The compact 1-module footprint leaves room for additional poles or auxiliary devices in a crowded enclosure.
The closest functional peer is the 5SL6006-7, which shares the same 1-pole C-curve 6 kA rating but at 6 A instead of 1 A. Both breakers share identical dimensions (18 mm width, 76 mm depth, 90 mm height), the same DIN-rail mounting, and the same 10 000 mechanical operating cycles. The 5SL6101-7YA is the correct choice when the protected circuit is sized for 1 A; substituting the 6 A variant would require verifying conductor sizing and load compatibility. The 5SL6016-7 (16 A) and 5SL6016-7KL (16 A with neutral switching) are higher-current siblings in the same mechanical footprint.