The Siemens 3VA2225-7HL32-0DC0 is a SENTRON molded case circuit breaker rated for 250 A continuous current at 40 °C with a 3-pole configuration and an ETU320 line-protection trip unit. Its interrupting rating reaches 330 kA at 240 V — that SCCR headroom means it can be applied upstream in a high-fault distribution panel where downstream breakers need full selectivity without cascading. The ETU320 is a basic electronic trip unit; no communication, no voltage-trigger, no ground-fault monitoring. For a BOM line that calls for a 250 A frame with a 3-pole line-protection MCCB, this part fits without a derating surprise — the 250 A holds across the 40–50 °C band before it starts to taper.
SCCR and selectivity — where the 330 kA matters
At 240 V the 3VA2225-7HL32-0DC0 is rated for 330 kA. At 415 V and 440 V it holds 242 kA; at 500 V it still delivers 187 kA. That is a lot of fault-current capacity for a 250 A frame. The practical meaning: you can place this breaker at the main or feeder position in a high-capacity switchboard and still have headroom for full selectivity with downstream branch breakers — no need to oversize to a larger frame just to get the interrupting rating. At 690 V the rating drops to 6.3 kA, so it is not a 690 V main breaker; the 690 V figure covers an infrequent line-to-line fault on a corner-grounded delta, not a primary application.
Thermal derating and panel integration
The breaker carries 250 A at 40, 45, and 50 °C without derating. Above 50 °C the current tapers: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, 213 A at 70 °C. If the panel ambient runs at 60 °C, plan for a 232 A continuous load — not the full 250 A. The 86 mm depth and 105 mm width fit a standard MCCB footprint; the 181 mm height includes the rotary handle and auxiliary switch cover. Mounted on a DIN rail or bolted to a backplate, the 50.5 W maximum power loss at rated current needs ventilation — don't bury it in a sealed gutter. The auxiliary contact version is 2 HQ switches; the undervoltage release (UVR) is built in, so a loss-of-control-voltage condition will trip the breaker open.