It mounts directly onto a contactor, making it a drop-in fit for motor starter assemblies where space on the DIN rail is already committed to the contactor footprint. The trip class is field-adjustable among CLASS 5E, 10E, 20E, and 30E, so the same relay can be tuned for fast protection on short-cycle loads or slower curves for high-inertia starts without stocking multiple variants. The main current circuit uses spring-loaded terminals, accepting solid conductors 2x (0.25 to 1.5 mm²) or stranded up to 1x 10 mm². The auxiliary contact ratings span 2 A at 24 V, 4 A at 120 V, and 3 A at 230 V, covering typical PLC and relay logic inputs.
Integration notes
Fastening method is contactor mounting — the relay clips directly onto the matching SIRIUS contactor, not onto a DIN rail. This saves one DIN slot per starter and keeps the overload relay mechanically ganged to the contactor for coordinated trip indication. Mounting position is any, so the assembly can be oriented horizontally, vertically, or flat without derating the thermal current. The relay withstands vibration per IEC 60068-2-6 at 1-6 Hz, 15 mm amplitude and 6-500 Hz, 20 m/s² for 10 cycles, and shock at 15g / 11 ms on the main body. The signaling contact (97/98) in the tripped position is rated for 9g / 11 ms.
Motor current setting and trip behavior
The relay trips when the motor current exceeds the upper current setting value multiplied by 3.5, and resets when the current falls below the lower current setting value. This hysteresis prevents nuisance cycling on momentary overloads. The note for message "tripped" indicates that the signaling contact changes state when the relay has operated — useful for wiring a remote alarm or PLC input that confirms the overload condition. Power dissipation is 0.57 W per pole, so a three-pole installation adds about 1.7 W of heat inside the enclosure — negligible for most panels but worth checking if the cabinet is densely packed and poorly ventilated.