What this MCCB carries and where it fits
The Siemens SENTRON 3VA2225-5HN42-0KH0 is a 4-pole molded case circuit breaker rated 250 A continuous at 40 °C through 50 °C, with the ETU350 electronic overcurrent release. That 250 A holds flat across the first 10 °C of ambient rise — at 55 °C it still carries 241 A, and at 70 °C it's 213 A. For a line-up MCCB in a warm enclosure, that thermal curve buys you headroom without oversizing the frame. Interrupting capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V. That 187 kA at 240 V is the headline number for high-fault panels near a transformer or large motor bank. The 690 V figure drops to 4.5 kA — still enough for most 690 V distribution, but check your available fault current at that voltage before committing the BOM line. Rated insulation voltage is 800 V, and the front face carries IP40 protection — fine for a clean indoor panel, but not for washdown zones. The auxiliary contact block is factory-fitted with 2 auxiliary switches plus 1 trip alarm switch (HQ version), which covers status feedback to a PLC without a separate add-on module.
Integration into the panel
Dimensions are 181 mm high, 140 mm wide, 86 mm deep — standard SENTRON 3VA2 4-pole frame. Mounts on a DIN rail or can be screw-fixed to a backplate. The ETU350 release is field-adjustable for long-time, short-time, instantaneous, and ground-fault (though this unit ships without ground-fault monitoring per). No communication module on this variant — it's a standalone line-protection breaker, not a smart MCCB for energy management systems.