The Siemens SENTRON 3VM1196-4ED12-0AA0 is a 1-pole molded case circuit breaker (MCCB) with a TM210 thermal-magnetic overcurrent release, rated 16 A continuously at 40 °C and carrying a switching capacity class S rating — 76 kA at 240 V AC and 9 kA at 415 V AC. The TM210 release is fixed thermal and magnetic — no field-adjustable trip settings, so the 16 A frame is the hard limit; if your load draws 16 A continuous, this holds, but a 15 A continuous load with a 20 A inrush (motor start) could nuisance-trip on the magnetic element.
Rated current holds steady at 16 A from 40 °C through 55 °C, then drops to 15 A at 60–70 °C. That means in a sealed, uncooled panel hitting 60 °C ambient (common in summer or near a heat source), you lose 1 A of headroom — plan for 15 A max continuous. The 25.4 mm width (1 inch) per pole matches the standard SENTRON 3VM family footprint, so it snaps onto a DIN rail and occupies one 25 mm module position in a distribution board. At 4 W power loss, it's not a heat contributor in a multi-pole panel; you can gang several without forced cooling.