The ABB 1SAM150000R1009 is a motor protection circuit breaker sized for a 6.3 A rated operating current at 690 V, with a 3-pole construction and a Class 10A tripping characteristic, per the specification. It sits in the contactor-and-starter accessory line as the short-circuit and overload element ahead of a contactor, protecting the motor rather than the wiring run alone. Buyers sourcing it for a starter bay should treat the 6.3 A figure and the Class 10A trip curve as the two numbers that decide fit — the trip class governs how quickly the device reacts to a stalled-rotor or overload condition on a standard induction motor, while the rated current sets the upper limit of the motor it can guard.
Panel-side fit and wiring
The footprint is narrow: 54 mm wide, 87.5 mm tall, and 75.5 mm deep, which keeps the device compact on a DIN rail next to a matching ABB contactor. Accepts flexible conductors from 0.75 mm² to 4 mm², so a panel builder terminates with standard ferruled wire rather than special lugs. Protection rating is listed as IP 20 / IP 10, meaning finger-safe on the terminal side once wired but not sealed against dust or water ingress — the device belongs inside an enclosure, not on the panel face.
Thermal envelope and mechanical life
Operating temperature runs from -25 °C to 50 °C, so the device covers unheated plant rooms and most outdoor-cabinet interiors without a heater strip. Mechanical service life is rated at 100 000 cycles, which is the figure that matters for a line that exercises the breaker frequently under test. No electrical endurance figure is in this record, so for high-cycle motor switching the upstream contactor carries the operational wear.