Parameters
Category Parameter Specification for MS325-0.16
General Product Type Manual Motor Starter (MMS) with thermal overload protection
Series MS325
Rated Operational Current (Iₑ) 0.16 A (at 400V AC, AC-3)
Rated Voltages & Duty Rated Insulation Voltage (Uᵢ) 690 V AC
Utilization Category AC-3: Squirrel cage motor switching
AC-1: Resistive load switching
Rated Operational Voltage (Uₑ) Up to 400 V AC, 50/60 Hz (for motor loads)
Switching Capacity Rated Operational Power (Pₑ) ~0.06 kW (at 400V AC, 3-phase)
Rated Service Short-Circuit Breaking Capacity (Iᵥ) Typically 1.5 kA (at 400V AC, with back-up fuse class gG/gL)
Protection Characteristics Overload Protection Thermal, bi-metal release
Trip Class Class 10 (as per IEC 60947-4-1)
Setting Range Fixed at 0.16A (non-adjustable for this model)
Ambient Temp. Compensation Yes, from -20°C to +60°C
Mechanical & Electrical Number of Poles 3 Poles (for 3-phase motors)
Control Method Manual toggle/rocker operation
Auxiliary Contacts Not included (available as add-on accessory modules)
Electrical Life (AC-3) ≥ 20,000 cycles
Mechanical Life ≥ 30,000 cycles
Terminals Terminal Type Screw clamp terminals
Acceptable Cable Size 0.5 - 2.5 mm² (flexible with ferrule) / 0.5 - 4 mm² (solid)
Torque 0.5 - 0.6 Nm
Standards & Approvals Compliance Standards IEC/EN 60947-1, IEC/EN 60947-4-1
Certifications CE, cULus, CCC, etc. (Market dependent)
Environmental Operating Temperature -25°C to +60°C
Storage Temperature -40°C to +70°C
Altitude Up to 2000 m without derating
Pollution Degree PD 2
Protection Degree IP20 (as mounted in enclosure)
Physical & Mounting Mounting 35 mm symmetrical DIN rail (EN 60715)
Dimensions (W×H×D) Approx. 45 × 80 × 60 mm (3-pole unit)
Weight Approx. 0.12 kg
The ABB MS325-0.16 is a miniature thermal motor starter from ABB's comprehensive MS (Manual Motor Starter) series. It is a compact, integrated protection and control device designed specifically for small, single-phase, or three-phase AC motors. The "0.16" designation indicates its rated operational current of 0.16 Amperes, making it suitable for very low-power motor applications.