What this 25 A MCCB carries and where it fits
The Siemens SENTRON 3VA2025-7JQ46-0AA0 is a 4-pole molded case circuit breaker rated for 25 A continuous current, designed for line protection in distribution panels. Its adjustable thermal overload range spans 38 A minimum to 300 A maximum, meaning you set the actual trip point anywhere within that window to match the downstream load — useful when the same breaker frame covers multiple feeder sizes across a facility. Interrupting capacity is specified per voltage: 330 kA at 240 V AC, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3 kA at 690 V. That 330 kA figure at 240 V covers high-fault scenarios common on the secondary side of large step-down transformers; the drop to 3 kA at 690 V reflects the lower available fault current typical at that voltage level. For a 25 A frame, these numbers give generous headroom for selectivity coordination downstream. Physical footprint is 86 mm deep, 140 mm wide, 181 mm tall — a compact 4-pole MCCB that fits standard panel layouts without oversizing the enclosure. The unit includes onboard communication capability for integration into a monitoring or control network, and its ground-fault monitoring uses summation current formation on the L + N conductor, so it detects leakage without a separate GFCI module.
Thermal performance across ambient temperature
The continuous current rating of 25 A holds flat across the full operating ambient range from -25 °C to 70 °C — no derating required up to the maximum. Storage extremes span -40 °C to 80 °C. Maximum power loss is 0.5 W, negligible for panel thermal budgeting.
Compliance and documentation
As a SENTRON-series MCCB, the 3VA2025-7JQ46-0AA0 carries the standard Siemens compliance documentation package: RoHS and REACH declarations, plus the relevant IEC/UL certifications typical for this product class. The insulation voltage is rated at 800 V. Specific cert numbers are available with the full datasheet on request.