Siemens 3RU2136-4HB0 thermal overload relay from the SIRIUS family, Size S2. Trip class CLASS 10, so it clears overloads fast enough for standard induction motors without nuisance tripping on starting inrush. Rated voltage 690 V. Integrated auxiliary switch delivers a "Tripped" signal — no separate contact block needed. Power dissipation 5.2 W per pole. In a densely packed panel that adds up, so plan for airflow if multiple relays cluster. Mounts directly on a contactor via the fastening method specified; panel-builder will appreciate the 55 mm width and 105 mm depth.
Lifecycle stage is current — no obsolescence notice, no last-time-buy date. RoHS substance prohibition date 10/15/2014.
Terminals: screw-type for the main circuit, accepts 2x (0.5…1.5 mm²) or 2x (0.75…2.5 mm²) solid or stranded. Pozidriv PZ2 screwdriver tip, shaft diameter 5–6 mm. Temperature compensation from –40 to +60 °C. Mount in any orientation – no derating for sideways install.