Key Specifications General Manufacturer: ABB Model / Part Number: MS165‑42 / 1SAM451000R1015 Product Type: Manual Motor Starter / Motor Protection Circuit Breaker Series: MS165 series Mounting: DIN rail (standard TH35) Electrical Ratings Rated Operational Current (Ie): 42 A Adjustable Overload Setting Range: 30 – 42 A Rated Operating Voltage: 208 – 690 V AC Rated Insulation Voltage (Ui): 1000 V Short‑Circuit Release Setting (Ii): 630 A Rated Service Short‑Circuit Breaking Capacity (Ics): 50 kA @ 230 V AC 50 kA @ 400 V AC 30 kA @ 500 V AC 10 kA @ 690 V AC Rated Ultimate Short‑Circuit Breaking Capacity (Icu): same as Ics for most voltages Rated Operational Power (AC‑3): ~22 kW @ 400 V AC Protection & Function Motor Protection: Thermal and short‑circuit protection with trip class 10 Phase Failure Sensitivity: Yes Disconnect Function: Built‑in (acts as manual disconnect) Trip‑Free Mechanism and Temperature Compensation included Handle Lockable: Yes (can be padlocked in OFF position) Mechanical & Physical Number of Poles: 3 Terminal Type: Screw terminals Degree of Protection: IP20 (housing) Mechanical Endurance: ~50,000 operations Electrical Endurance: ~25,000 operations Mounting Position: Any (DIN rail) Approx. Dimensions: ~55 mm (W) × ~142.6 mm (H) × ~122.1 mm (D) Approx. Weight: ~0.97 kg Applications Motor control and protection in industrial systems Protection of pumps, fans, compressors, conveyors Manual switching and motor overload protection