Siemens 3VA1125-5ED16-0AA0 — 1-Pole 25 A SENTRON MCCB with TM210 Release
The Siemens 3VA1125-5ED16-0AA0 is a 1-pole SENTRON molded case circuit breaker rated at 25 A continuous current (Iu) with a TM210 thermal-magnetic release providing LI (long-time and instantaneous) protection for line-feeder applications. 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. The front face carries IP40 protection — suitable for enclosed panel mounting, not for washdown or outdoor exposure without a secondary enclosure. Power dissipation at rated load is 2.83 W maximum, which matters for thermal budgeting inside a densely packed panel.
Physical Fit and Panel Integration
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. It mounts on a DIN rail or directly to a backplate via the integral clip; the 25.4 mm pitch matches the standard 1-inch modular spacing used across the SENTRON line, so it drops into an existing panel layout without re-spacing adjacent devices.