What this MCCB brings to a panel
The Siemens 3VA2025-7JP32-0AA0 is a SENTRON molded case circuit breaker rated for 25 A continuous current across the full 40–70 °C ambient range — no derating needed up to that ceiling. The ETU550 electronic trip unit gives you adjustable long-time delay (tr 0.5–25 s) and short-time delay (tsd up to 0.5 s), which means you can coordinate selectivity downstream without sacrificing fault clearance speed. Breaking capacity hits 330 kA at 240 V and 242 kA at 415/440 V, so it handles high-fault utility feeds or transformer secondaries without cascading upstream. Three-pole construction, line protection version — this is the main feeder or large subfeed breaker in an industrial distribution panel.
Panel fit and footprint
Dimensions are 105 mm wide × 181 mm tall × 86 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON mounting plates and panelboards without re-drilling. Front IP40 protection keeps dust out of the trip-unit interface; the enclosure is designed for DIN-rail or screw-mount installation in a distribution cabinet. The 0.84 W maximum power loss means negligible heat contribution to the enclosure thermal budget.
What the ratings mean for your coordination study
The 330 kA interrupting rating at 240 V is the headline number, but the real-world selectivity tool is the ETU550's adjustable time bands. Long-time pickup is fixed at the 25 A rated current; short-time delay adjustable up to 0.5 s lets you ride through motor-start inrush or transformer magnetizing current without nuisance tripping. The 800 V rated insulation voltage (Ui) covers 480/600 V systems with margin. Storage range of -40 to 80 °C means this breaker can sit in an unheated warehouse or on a truck in transit without damage.