Panel-builder commissioning notes
The Siemens 3VA1125-4ED36-0AA0 is a SENTRON molded case circuit breaker (MCCB) in the line-protection version, carrying a rated continuous current Iu of 25 A across the full 40 °C to 50 °C band — no derating needed until you push past 55 °C, where it steps to 24 A, then 23 A at 65 °C and above. Three poles, TM210 thermal-magnetic release, and a breaking capacity that drops from 121 kA at 240 V to 76 kA at 415 V, then 53 kA at 440 V, and settles at 11.9 kA for both 500 V and 690 V — so the voltage class of your distribution bus determines which interrupting rating applies.
Integration dimensions and mounting
Footprint: 76.2 mm wide (3 in), 130 mm tall (5.1 in), 70 mm deep (2.8 in).
Fault isolation and field service
The TM210 overcurrent release is a fixed thermal-magnetic type — no interchangeable trip units, so the 25 A rating is baked in. The -40 °C floor matters for cold-start installations in unheated shelters or outdoor enclosures.