What It Is and Where It Fits
The Siemens 3RU1116-1HB0-ZW96 is a SIRIUS thermal overload relay in Size S00, designed to protect three-phase motor loads against sustained overcurrent and phase-loss conditions. It mounts directly to a contactor or clips onto a DIN rail within the panel, making it a standard building block for motor starter assemblies up to the S00 frame. Trip Class 10 means it will trip within 10 seconds at 7.2× the set current — fast enough to protect standard induction motors without nuisance tripping on normal startup transients. Rated for continuous operation from -20 °C to +70 °C, with storage down to -55 °C, so it holds up in unheated enclosure environments as long as the panel temp stays within that band.
Installation and Clearance Notes
Width is 45 mm, height 87 mm, depth 78 mm — standard single-module footprint for the S00 family; side clearance required is 6 mm for heat dissipation, and zero spacing needed in the vertical stack direction (up, down, forward, backward all 0 mm). Mounting position allows a vertical surface with ±135° rotation and ±45° tilt forward/back, so it fits non-standard panel orientations without derating. IP20 on the front means it's touch-safe against fingers but not sealed against dust ingress — expected for a panel-mounted device, but keep it out of washdown zones.
Termination and Wiring
Main and auxiliary/control circuits both use screw-type terminals. Main contacts accept 2x (0.5 to 1.5 mm²) solid or 2x (0.75 to 2.5 mm²) stranded — also spec'd in AWG as 2x (20–16) and 2x (18–14) plus a 12 AWG option — covering the typical motor lead sizes for S00 starters. Each pole dissipates 2.2 W at full load, so the enclosure thermal budget needs to account for about 6.6 W total across the three poles.
Protection and Compliance
Carries surge voltage withstand rated at 6 kV, and shock resistance tested to 8g / 10 ms, so it handles industrial line transients and vibration on contactor frames. ATEX approval listed (DMT 98 ATEX G 001) for use in potentially explosive gas atmospheres — confirm the specific zone and gas group against your installation, but the cert is on file. RoHS compliance date of 07/01/2006 meets EU substance restrictions.