The Siemens 3VA1125-5ED32-0AA0 is a SENTRON 3VA molded case circuit breaker (MCCB) rated 25 A at 40 °C ambient, 3-pole, with a TM210 thermal-magnetic overcurrent release. Its interrupting rating hits 187 kA at 240 V AC — that's the peak fault current it can safely clear without welding contacts or rupturing the case, sized for high-available-fault panels where a standard MCCB would fail catastrophically.
Ratings and what they mean for the panel
Rated current holds at 25 A from 40 °C through 50 °C ambient, then derates to 24 A at 55 °C and 60 °C, and 23 A at 65 °C and 70 °C. That means in a warm enclosure — say a 50 °C switchroom — you still get the full 25 A; above that you need to account for the 1 A drop per 5 °C step. The interrupting curve drops sharply with voltage: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500 V and 690 V. For a 480 V panel, the 75.6 kA figure governs your SCCR coordination study. The TM210 release is a thermal-magnetic design — thermal element handles overload protection (inverse time), magnetic element handles short-circuit (instantaneous). No undervoltage release, no ground-fault monitoring, no communication function on this variant. Insulation voltage rated 800 V, so it's suitable for 690 V line-to-line systems with margin.
Physical fit and panel integration
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. That 70 mm depth (2.76 in) is the dimension from the mounting surface to the front of the breaker — critical for enclosure depth clearance. The 76.2 mm width (3 in) is the standard 3-pole MCCB footprint for this frame size; it occupies three 25 mm DIN positions if mounted on a DIN rail, or bolts directly to a mounting plate. Front IP40 protection class means it's protected against tools and small wires entering from the front, but not sealed against dust ingress — keep it inside a panel enclosure rated to the environment.