Siemens 3VA1125-5ED16-0AA0 — 1-Pole 25 A SENTRON MCCB with TM210 Release
The interrupting rating hits 121 kA at 240 VAC and 9 kA at 415 VAC — the 240 V figure covers high-fault-capacity panels where a standard MCCB would weld open. The TM210 release is fixed at 320 A instantaneous (li min and li max both 320 A), so it's a non-adjustable magnetic trip; the thermal element carries the full 25 A through 50 °C ambient, then derates to 24 A at 55–60 °C and 23 A at 65–70 °C. Rated insulation voltage Ui is 500 VAC; maximum DC operating voltage is 125 V. Power dissipation at rated load is 2.83 W maximum, which matters for thermal budgeting inside a densely packed panel.
The breaker occupies a 25.4 mm (1 in) width per pole — standard for a 1-pole SENTRON 3VA frame. Overall dimensions are 130 mm height by 70 mm depth.