100 A continuous rating — what it means for your load
The 1SDA068087R1 carries a rated current In of 100 A — this is the continuous current the breaker will carry without tripping under normal conditions. The load current must stay at or below 100 A for the breaker to hold; any sustained overload above that will eventually trip the thermal element. The frame rating Iu is 160 A, meaning the physical breaker shell and contacts are sized for up to 160 A. The installed trip unit sets the actual protection threshold at 100 A, but the frame can accept a higher-rated trip unit later without changing the enclosure.
Trip unit and protection curve
The TMA trip unit is thermal-magnetic with an adjustable thermal (overload) setting and a fixed instantaneous (short-circuit) threshold. The '100-1000' in the type code indicates the thermal adjustment range — from 100 A up to 1000 A (the frame's maximum). This suits distribution and general motor protection where the overload pickup needs field adjustment. Rated voltage is 690 V, covering both 400 V and 690 V industrial distribution systems. The breaker is rated for 50/60 Hz, so it works on either grid frequency without derating.