Siemens 3VA2140-8KP46-0AA0 — SENTRON MCCB for Line Protection
The Siemens 3VA2140-8KP46-0AA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection, carrying a rated continuous current of 40 A across the full ambient temperature range from 40 °C to 70 °C without derating. Rated insulation voltage is 800 V, and the breaker is fitted with an ETU850 electronic overcurrent release — a programmable trip unit that supports communication functions for integration into monitored distribution systems. Breaking capacity is rated at 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V — figures that give the panel designer headroom for high-fault-current installations where SCCR coordination is critical.
Selectivity and Coordination for the Site Engineer
With a maximum frame rating of 480 A and a minimum setting of 60 A, this 4-pole MCCB covers a wide adjustment band for feeder protection. The ETU850 release allows the engineer to dial in the long-time, short-time, and instantaneous pickup values to achieve selective coordination with downstream breakers — critical for minimizing outage scope on a plant floor. Front-face protection class is IP40.
Physical Fit and Panel Integration
Dimensions are 86 mm depth, 140 mm width, and 181 mm height — a 4-pole footprint that fits standard SENTRON 3VA2 panel cutouts and busbar systems. No undervoltage release or ground-fault monitoring is fitted on this variant, so those functions must be added externally if required. Storage temperature range is -40 °C to 80 °C; operating range is -25 °C to 70 °C. Maximum power loss is 1.2 W per pole — negligible for thermal budgeting inside a sealed enclosure.