CLASS 10 trip and motor protection duty
The 3RU1136-4AB0 is a SIRIUS thermal overload relay from Siemens, designed to protect motors against overload and phase failure. Rated for Size S2 frame, it mounts directly onto the matching SIRIUS contactor via the contactor mounting fastening method — no separate DIN-rail bracket needed. The front face carries IP20 protection, safe for finger-probe access inside an enclosure.
Terminal capacity and wiring range
All terminals are screw-type, so expect a screwdriver for termination. Power dissipation per pole is 3.5 W — factor this into the enclosure thermal budget when the relay is continuously loaded at the full setting range.
Environmental and compliance profile
The relay withstands 100 % relative humidity during operation and shock up to 8g for 10 ms. Surge voltage resistance is rated at 6 kV, covering typical industrial transient conditions. Carries ATEX certification DMT 98 ATEX G 001, allowing use in potentially explosive gas atmospheres when paired with an appropriate contactor and motor. The mounting position is flexible — vertical surface with ±135° rotation and ±45° tilt front-to-back — easing panel layout constraints.