The Siemens 3VA1112-4ED46-0AA0 is a SENTRON molded case circuit breaker (MCCB) sized for line protection in 4-pole applications, carrying a continuous rating of 125 A from 40 °C up through 50 °C before it starts to derate — 122 A at 55 °C, 120 A at 60 °C, on down to 114 A at 70 °C. That thermal curve means in a warm panel you still get the full 125 A unless the ambient is pushing past 50 °C.
The interrupting ratings are the headline here: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. For a site electrical engineer working selectivity, the 4-pole design means you can use it on a 3-phase + neutral system and coordinate with downstream breakers.
Dimensions are 70 mm deep, 101.6 mm wide (4 inches), and 130 mm tall. The 4-inch width is standard for a 4-pole MCCB in this frame size — it'll drop into a panel that's laid out for a SENTRON 3VA footprint without surprises.
What it doesn't have — so you don't order the wrong variant
This is the bare-bones line-protection version. If you need any of those features — say, an undervoltage release for a safety circuit, or ground-fault alarm on a feeder — you need a different suffix on the 3VA order code. The TM210 release is the thermal-magnetic type, not electronic, so trip curve adjustment isn't available on this variant.