What this relay does and where it fits
The Siemens 3RU2116-1AB1-ZX95 is a SIRIUS thermal overload relay in Size S00, designed for motor protection in control panels. Its CLASS 10 trip characteristic means it will open the circuit within 10 seconds at 7.2× the set current — fast enough to protect standard induction motors during a stall or locked-rotor event without nuisance tripping on normal starts. Switching capacity is rated at 2 A at 24 V, 2 A at 230 V, and 1 A at 400 V — these are the contact ratings for the auxiliary circuit that signals the tripped state to a contactor or PLC input. The relay also carries a note "for message 'Tripped'", confirming the auxiliary contacts are wired to report a trip condition, not to switch the motor directly. The housing is 45 mm wide, 89 mm high, and 80 mm deep — a standard Size S00 footprint that fits DIN-rail or screw-panel mounting in most motor starter assemblies. Screw-type terminals on the main circuit accept 2x (0.5...1.5 mm²) or 2x (0.75...2.5 mm²) solid or stranded wire.
Environmental and compliance
Operating temperature range is -40 to +70 °C; storage and transport range is -55 to +80 °C. Temperature compensation is active from -40 to +60 °C, keeping trip accuracy stable across most industrial environments. The relay is RoHS-compliant per the substance prohibitance date of 10/01/2009.