What this breaker does and where it fits
The Schneider GV2ME03A is a 3-pole motor circuit breaker from the TeSys Deca range, built for dedicated motor protection under IEC/UL 60947. Its 0.4 A thermal-magnetic trip unit covers fractional-horsepower motors (0.12 kW at 400 V, 0.18 kW at 400 V, 0.37 kW at 690 V) in a single housing. The 100 kA breaking capacity across 230–690 V AC gives you fault clearance almost anywhere on a low-voltage network, so you can hold SCCR without a separate fuse or limiter. Mounts on 35 mm DIN rail (or panel with adaptor plate), IP20 front face, 45 mm wide — fits the standard TeSys Deca footprint alongside contactors and overloads. The thermal-magnetic element provides overload and short-circuit protection in one device; phase-failure sensitivity is built in per IEC 60947-4-1, so single-phasing on the supply trips the breaker before the motor overheats.
What the ratings mean for a specifier
The 0.4 A line-rated current is the setting you apply to match the motor full-load amps — do not confuse with the magnetic trip threshold (5.8 A), which handles short-circuit only. Power dissipation per pole is 2.5 W. Breaking capacity of 100 kA holds at every standard voltage up to 690 V. Utilization category A, AC-3, and AC-3e per IEC 60947 means it is rated for normal starting duty of motors.