It mounts directly onto Size S0 contactors, saving panel space and wiring. The relay uses a thermal bimetallic release, so it responds to the motor's actual heating curve — not just instantaneous current — which makes it a solid fit for standard induction motor starting duty where the rotor is locked for under 10 seconds.
The adjustable current range of 27 to 32 A sets the full-load motor current the relay protects. The relay is rated for a main circuit operating voltage of 690 V and an insulation voltage of 690 V with pollution degree 3, so it is suitable for 400 V and 480 V systems with margin.
The relay fastens directly onto a Size S0 contactor — no separate base or wiring between contactor and overload. The main circuit uses screw-type terminals accepting 2x (0.5...1.5 mm²) or 2x (0.75...2.5 mm²) solid or stranded, or AWG 16-12 and 14-8. Auxiliary circuit terminals are also screw-type, accepting 2x (20-16) or 2x (18-14) AWG. Tightening torque for main contacts is 2 to 2.5 N·m. Required side spacing to grounded parts is 6 mm.