Siemens SENTRON 3VA2010-7JP32-0AA0 — 100 A MCCB with ETU550 Trip Unit
The Siemens SENTRON 3VA2010-7JP32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current, designed for line protection in distribution panels and switchgear assemblies. It carries the ETU550 electronic trip unit, which provides adjustable overload and short-circuit protection curves — a step up from fixed thermal-magnetic breakers for selectivity coordination studies. Breaking capacity reaches 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 at 240 V is the headline number for high-fault service-entrance applications; the 242 kA at 415 V still covers most industrial distribution scenarios. The 690 V rating drops sharply to 3 kA — this breaker is not the primary choice for 690 V motor circuits unless fault current is tightly limited upstream. Rated insulation voltage is 800 V, and the unit includes a communication function for integration with higher-level monitoring or energy management systems — useful for facilities tracking branch-circuit load data without adding separate metering.
Sizing and Thermal Performance
The 100 A rating holds flat across the entire operating temperature range from -25 °C to 70 °C — no derating needed up to the maximum ambient. That simplifies panel sizing in unconditioned enclosures or near heat-producing equipment. Power loss at rated current is 7.7 W maximum, manageable for standard enclosure thermal calculations. Dimensions are 181 mm height, 105 mm width, 86 mm depth — a standard SENTRON 3VA frame footprint. The IP40 front protection means it is suitable for enclosed panel mounting where the breaker face is behind a closed door; not rated for washdown or outdoor exposure without an additional enclosure.