Siemens SENTRON 5SL1216-6MB — 2-pole B-curve MCB, 16 A, 3 kA
The Siemens 5SL1216-6MB is a SENTRON miniature circuit breaker (MCB) rated 16 A at 230/400 V AC, with a B tripping characteristic and a 3 kA breaking capacity per IEC 60947-2.
Voltage, frequency, and DC capability
Rated for 50/60 Hz supply. Single-phase operation at 253 V AC; multi-phase at 440 V AC maximum. It also carries a DC rating of 72 V maximum — useful for control circuits or battery-backed loads in the same enclosure, though the 3 kA breaking capacity at DC should be verified against the specific DC fault current available.
Overall dimensions: 90 mm tall, 76 mm deep, 36 mm wide (2 MW). Installation depth is 70 mm — the extra 6 mm accounts for the terminal screws and outgoing cable bend radius. Sealable, halogen-free, silicon-free construction — relevant for environments where outgassing or silicone contamination affects contacts or optics.
How it sits against the wider SENTRON range
Compared to the 5SL4363-7 (3-pole, C-curve, 63 A, 10 kA), the 5SL1216-6MB is a lighter-duty residential/infrastructure breaker — lower current, lower fault-interrupt rating, and a B-curve that trips faster on modest overloads. The 5SL6016-7 (1P+N, C-curve, 16 A, 6 kA) is the single-phase compact sibling; it also switches the neutral but fits in one MW (18 mm). The 5SL1216-6MB gives you two independently protected poles in a 2-MW footprint — no shared neutral, full isolation on both lines.