The Siemens SENTRON 3VA1112-5EF36-0AH0 is a 3-pole molded case circuit breaker rated for 125 A continuous current (Iu) at 40 °C, with a TM240 thermal-magnetic overcurrent release. That 125 A holds flat through 50 °C — you don't lose headroom until 55 °C, where it steps to 120 A, then 117.5 A at 60 °C, 115 A at 65 °C, and 112.5 A at 70 °C. So for a panel running at 50 °C ambient, you get the full 125 A; above that, the derating curve is already baked into the part's rating table. Interrupting capacity is the headline: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V. Depth is 70 mm, width 76.2 mm, height 130 mm; that 76.2 mm width is a standard 3-pole MCCB footprint on a DIN rail or mounting plate.
Auxiliary contacts and trip signaling
The trip alarm switch changes state only when the breaker trips on fault — not on manual open — so a PLC or annunciator gets a dedicated fault signal separate from the run/stop status. That saves an external relay or a second contact block. The TM240 release is fixed, not adjustable for long-time pickup, but the long-time delay (tr max) is set to 1 second.
The 3VA1010-2ED32-0JA0 is a smaller-frame SENTRON MCCB — lower continuous current and interrupting ratings. The 3VA1112-5EF36-0AH0 carries a 125 A frame with 187 kA interrupting at 240 V, while the 3VA1010-2ED32-0JA0 is a 100 A frame with a lower interrupting capacity. The 3VA1112 will not drop into a panel wired for the 3VA1010 without checking bus-bar spacing and lug size — the frame depth and terminal layout differ. If your BOM calls for the 3VA1010, the 3VA1112 is not a direct mechanical swap; you'd need to re-evaluate the mounting and conductor terminations.