Technical Parameters
Parameter Specification
Product type Manual Motor Starter / Motor Protection Breaker
Series / Model MS495‑63
ABB Ordering Code 1SAM550000R1007
Poles 3
Rated operational current (Ie) 63 A
Overload release setting range 45–63 A
Undelayed instantaneous short‑circuit release setting 819 A
Rated operational voltage 230–690 V AC
Rated service short‑circuit breaking capacity (Ics) 50 kA @ 400 V AC
Thermal protection type Thermomagnetic
Phase failure sensitive Yes
Rated motor power (AC‑3, 400 V) 30 kW
Connection type Screw terminals
Control element Rotary handle (ON/OFF/TRIP)
Handle features Lockable to prevent unauthorized changes
Mounting Panel / DIN‑rail (TH35)
Protection degree Housing IP20, Main terminals IP00
Insulation withstand / Impulse Typical 6 kV
Ambient operating temperature ‑20 °C to +70 °C (compensated ‑20 °C to +60 °C)
Ambient storage temperature ‑50 °C to +80 °C
Mechanical durability ~50 000 cycles
Electrical durability ~25 000 cycles
Standards IEC/EN 60947‑1, 60947‑2, 60947‑4‑1, UL 508, CSA 22.2 No. 14
Typical applications Motor switching and protection, control panels, industrial installations
The ABB MS495‑63 (1SAM550000R1007) is a manual motor starter with built‑in thermomagnetic protection designed to manually switch motors on and off and to provide reliable protection against overload, short‑circuit and phase failure conditions without requiring external fuses. It features a rotary handle with clear ON/OFF/TRIP position indication and is suitable for use with three‑phase and single‑phase motors in industrial and commercial installations. The starter includes a built‑in disconnect function and temperature compensation for enhanced motor protection.