Trip Class 10 — what it means for motor protection
The 3RU2126-1EB0 is a SIRIUS thermal overload relay, Size S0, designed to protect motors against overload and phase loss. Power ratings at those voltages: 1.5 kW at 400 V, 2.2 kW at 500 V, 3 kW at 690 V.
Mounting and wiring — contactor-mount, screw terminals
Mounts directly onto the contactor via the fastening method — no DIN rail or separate base required. Dimensions: 85 mm height, 45 mm width, 85 mm depth. Mounting position is any orientation. Temperature compensation is active from -40 °C to +60 °C, so the trip curve stays accurate across the panel ambient range.
Auxiliary contact ratings and signaling
The integrated auxiliary switch provides a 'Tripped' message contact. Contact ratings vary by voltage: 2 A at 24 V, 3 A at 120 V, 2 A at 230 V, 1 A at 400 V, 0.75 A at 690 V. Lower ratings at 60 V (0.3 A), 110 V (0.22 A), 125 V (0.22 A), and 220 V (0.11 A) — check the specific control voltage when wiring the trip signal back to the PLC input. Per-pole power dissipation is 1.9 W. The auxiliary contact is rated for the full range of control voltages listed — no external interposing relay needed for most 24 VDC or 120 VAC PLC inputs.
Lifecycle and compliance documentation
MTTF with high demand rate is 2280 years.