Siemens 5SJ6102-7 — SENTRON 1-pole C-curve 2 A MCB
The Siemens SENTRON 5SJ6102-7 is a 1-pole miniature circuit breaker with a C tripping characteristic, rated 2 A at 240 V AC and a 6 kA breaking capacity per EN 60898 (also rated 6 kA per IEC 60947-2).
At 2 A, it's a control-circuit protector, not a feeder breaker. The 6 kA breaking capacity at 240 V AC is the standard domestic/light-commercial fault level per EN 60898; the same 6 kA rating per IEC 60947-2 confirms it also meets the industrial standard for the same fault level. The 1-pole form factor and single width unit mean it fits a standard 18 mm DIN slot — no panel rework needed to swap in a like-for-like replacement. For DC circuits, the maximum rated voltage is 60 V — useful for control-voltage DC auxiliaries within that limit. The breaker is rated for any mounting position and any power-supply cord position, giving flexibility in tight enclosures. Environmental range covers -40 °C to +75 °C storage and operation, with periodic humidity up to +55 °C at 95% RH. Vibration resistance per IEC 60068-2-6 is 50 m/s² at 25 to 150 Hz and 60 m/s² at 10 to 150 Hz — sufficient for installation near moderate industrial machinery. Mechanical service life is 20 000 switching cycles typical.
Compliance and approvals
Degree of pollution 2 and overvoltage category III are standard for fixed-installation distribution boards. Touch protection is provided on the terminals.
The 5SJ6102-7 carries a current-production lifecycle status, so it remains in the SENTRON catalog as an active order code. For a BOM line that specifies this exact 5SJ6-series 2 A C-curve MCB, the part is the right-sized spec — no need to second-source unless the panel was originally built around a different footprint.