The Siemens 3VA4125-5ED14-3AA0 is a 1-pole circuit breaker from the 3VA4 series, UL Frame 125, rated 25 A with a breaking capacity of 35 kA at 277 V. It uses a TM210 thermal-magnetic trip unit with fixed overload protection (Ir = 25 A) and fixed short-circuit protection (Ii = 12 × In). This is a line-protection device, not a motor-protection or ground-fault breaker — the FTFM (Fixed Thermal, Fixed Magnetic) trip means no field-adjustable dials for Ir or Ii, so the BOM must specify the exact 25 A rating. The 35 kA interrupting rating at 277 V places it in breaking capacity class M (medium). The 1-pole form factor suits single-phase branch circuits or multi-pole ganging via the 3VA4 common-trip bar (sold separately).
Sourcing and ordering
Classified as Product class C — manufactured/produced to order, not a stocked off-the-shelf item. This means the unit is built to Siemens' production schedule after the order is placed, so lead time is not a standard shelf pull. The packaging dimensions (472 × 396 × 213 mm) and single-piece quantity unit reflect a individually boxed breaker.