Rated current In 100 A — continuous load capacity
The 1SDA068101R1: The rated current In is 100 A, which defines the maximum continuous current the breaker can carry without tripping under normal conditions. This is the value used for feeder and branch-circuit sizing in distribution panels — the breaker protects downstream conductors and loads at this ampacity. The frame rating Iu is 160 A, meaning the XT4 frame is physically rated for a higher maximum current than the installed trip unit. This allows future uprating to a higher In trip unit within the same frame without replacing the entire breaker — a common panel-build consideration.
4-pole configuration for three-phase plus neutral
This is a 4-pole MCCB, switching all three phases plus the neutral conductor. In distribution boards, the switched neutral allows the neutral to be isolated when the breaker is open — required in TN-S and TN-C-S systems where the neutral is not bonded to earth downstream. The TMA trip unit provides thermal-magnetic protection: the thermal element handles overloads (inverse time curve), and the magnetic element handles short-circuits (fixed instantaneous threshold). The TMA designation means the trip unit is non-interchangeable in the field — it is factory-set and sealed.
Voltage and frequency — 690 V / 50-60 Hz
Rated voltage Ur is 690 V AC, covering standard 400 V and 480 V distribution systems with headroom for 690 V industrial grids. The 50/60 Hz frequency rating means the breaker's thermal and magnetic characteristics are calibrated for both mains frequencies without derating — no adjustment needed when moving between 50 Hz and 60 Hz installations.
Sourcing and availability
The estimated lead time from the manufacturer is 2–4 weeks for production quantities.