SENTRON 3VA2 MCCB — 100 A, 4-Pole Line Protection with ETU850
Its 4-pole configuration and ETU850 electronic overcurrent release make it a line-protection device suited for main or feeder breaker duty in LV distribution boards. The interrupting ratings are substantial: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.8 kA at 690 V.
Dimensions are 181 mm height, 140 mm width, and 86 mm depth — a compact footprint for a 100 A 4-pole MCCB with this interrupting capacity. The N-conductor protection is adjustable — can be set to OFF or from 20% to 160% of the phase rating — which gives flexibility for different system grounding configurations without swapping hardware.
Release, Endurance, and Communication
The ETU850 electronic release provides adjustable time delays (tr) from 0.5 s to 25 s, allowing selective coordination with downstream breakers. This unit includes a communication function and an 'other measurement function' capability, meaning it can integrate with higher-level monitoring systems for power metering and remote trip indication — useful for facility management or SCADA integration.
Lifecycle stage is marked as current — meaning this is an active-production part from Siemens, not a phase-out or obsolete line. That matters for a BOM line because it means the manufacturer intends to support it for the foreseeable future, with no last-time-buy clock ticking.