Technical Parameters Parameter Specification Product Name ABB MS495‑40 Manual Motor Starter Product Type Manual motor starter / motor protective circuit breaker Series / Family MS495 Part Number / Catalog 1SAM550000R1005 Rated Operational Current (I_e) 40 A Trip Setting Range 28 – 40 A Number of Poles 3 Rated Operational Voltage (U_e) Up to 690 V AC / 450 V DC Rated Insulation Voltage (U_i) 690 V Rated Impulse Withstand Voltage (U_imp) 6 kV Rated Service Short‑Circuit Breaking Capacity (I_cs) 25 kA at 400 V AC Rated Ultimate Short‑Circuit Breaking Capacity (I_cu) 50 kA at 400 V AC Rated Instantaneous Short‑Circuit Current Setting (I_i) 520 A Rated Frequency 50 / 60 Hz Mounting Type DIN‑Rail (TH35) mountable Degree of Protection Housing IP20 / Main circuit terminals IP00 Thermal Trip Class Class 10 Handle Rotary handle with ON/OFF/TRIP indication, lockable Mechanical Durability ~50 000 operations Electrical Durability ~25 000 operations Operating Temperature –20 °C to +70 °C (ambient) Typical Motor Protection Overload, short circuit, phase failure protection Optional Accessories Auxiliary contacts, signalling contacts, shunt release, undervoltage release