The Siemens SENTRON 3VA2125-5MN36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 25 A continuous current, flat across the entire -25 °C to 70 °C operating range — no derating needed as the panel warms up. Its interrupting capacity hits 187 kA at 240 V AC, dropping to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 3.7 kA at 690 V.
Motor protection with adjustable trip class
This MCCB is designated for motor protection duty and carries the ETU350M electronic overcurrent release. The trip class is field-adjustable among 10A, 10E, and 20E — so you can match the thermal memory to the motor's starting profile: 10A for short acceleration times (standard pumps, fans), 10E for slightly longer starts, and 20E for high-inertia loads like centrifuges or crushers that take several seconds to reach speed.
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint that drops into most Siemens 3VA panelboards and switchgear cubicles without busbar rework.
Selectivity and coordination
The flat 25 A rating across the full temperature range means no nuisance tripping in hot enclosures. Power loss is only 0.6 W maximum — negligible for panel thermal budgeting.