The Siemens 3VA1125-5EF36-0AB0 is a SENTRON molded case circuit breaker (MCCB) rated 25 A continuous at 40 °C ambient, with no derating needed up to 50 °C — the same 25 A holds at 45 °C and 50 °C. Above that, it steps down to 24 A at 55 °C and 60 °C, then 23 A at 65 °C and 70 °C. That flat thermal curve means the breaker can sit in a warm enclosure without losing headroom until the ambient crosses 50 °C. The TM240 overcurrent release is a thermal-magnetic type, fixed at 25 A, so the trip curve is factory-set — no field-adjustable thermal dial. For a 3-pole line-protection MCCB, that's the standard fit for fixed-load feeders where you want the breaker's rating locked to the conductor ampacity.
The interrupting ratings span the common distribution voltages: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. The breaker's design voltage class is 690 V maximum, so it is not rated for 1000 V applications.
The 3VA1125-5EF36-0AB0 measures 130 mm high, 76.2 mm wide (3 inches), and 70 mm deep. The auxiliary switch configuration is listed as 2 auxiliary switches HP (high-performance), integrated into the breaker's accessory slot. The basic switch assembly order code is 3VA11255EF360AA0, which is the internal switching mechanism; the -0AB0 suffix on the main MPN indicates the factory-fitted accessory package.
The storage minimum is the handling limit, not the running condition.