The Siemens 3VA2025-6JP42-0AA0 is a SENTRON molded case circuit breaker (MCCB) in the line protection version, rated for 25 A continuous current (Iu) across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Four poles, ETU550 electronic trip unit, and a breaking capacity that hits 242 kA at 240 V, 187 kA at 415 V, and still holds 3 kA at 690 V. That kind of interrupting muscle makes it a fit for high-fault panels where standard breakers would weld shut.
What the ratings mean for fit
The 242 kA at 240 V isn't a number you see on a 25 A frame every day — it tells you this breaker is designed for high-available-fault locations like transformer secondaries or large busway taps where the prospective short-circuit current is extreme. The 187 kA at 415 V confirms it handles the same class of fault on common 400 V industrial feeds. At 690 V the rating drops to 3 kA, which is still useful for low-fault 690 V motor circuits but not the main event. The ETU550 release gives you adjustable long-time (tr 0.5–25 s) and short-time pickup, plus ground-fault options — the N-conductor protection is adjustable OFF, 40% to 160% of Iu, so you can tune it for 4-wire systems with harmonic loads.
Lifecycle and sourcing reality
Lifecycle status is current — this is an active, in-production catalog item from Siemens, not a phase-out or NRND part. That means factory support, firmware updates for the ETU550, and full compliance documentation (CE, UL/CSA per the SENTRON family) are available. For procurement: quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time. No last-time-buy clock ticking on this one.
Panel integration
The 3VA2025-6JP42-0AA0 measures 140 mm wide, 181 mm tall, and 86 mm deep — a 4-pole MCCB that fits standard SENTRON mounting patterns. IP40 on the front, so it's panel-front protected against tools and small solids but not washdown. Communication function is built in (yes), meaning it can talk to a higher-level system via the SENTRON communication modules — useful for energy monitoring or remote trip indication without adding a separate power meter.