CLASS 10 trip curve and motor protection
The 3RU2136-1KB0: This suits standard induction motor starts where the inrush decays quickly — the relay rides through the start without nuisance tripping, but still protects against a locked-rotor condition. The thermal overload release (bimetal) tracks motor heating, not just instantaneous current. Temperature compensation from -40 to +60 °C keeps the trip curve stable across the panel ambient range.
This relay mounts directly onto a Siemens SIRIUS contactor (Size S2) — no DIN rail needed for the relay itself. The 55 mm width, 90 mm height, and 105 mm depth match the contactor footprint, so the assembly occupies a single panel slot. The screwdriver spec is Pozidriv PZ2 with a 5–6 mm shaft diameter.
Auxiliary contact ratings and trip signaling
The integrated auxiliary switch provides a 'Tripped' signal — useful for feeding a PLC input or a status lamp. The 690 V rated value covers the main circuit voltage class. These lower-voltage ratings matter when the control circuit runs on a 24 VDC or 110 VAC supply — confirm the switched load stays within the curve.