SIRIUS thermal overload relay, Size S3, Class 10
Rated for a wide operating temperature range of -20 to +70 °C and shock resistant to 8g / 10 ms, this relay is built for the vibration and thermal cycling common on conveyor drives, pump skids, and compressor panels. ATEX certification (DMT 98 ATEX G 001) is on record, so the relay can be specified for motor circuits in potentially explosive atmospheres (Zone 1 or Zone 2, gas groups) when paired with a suitably rated contactor and upstream protection.
Auxiliary contact ratings and coordination
The auxiliary contact block is rated for switching at multiple control voltages: 1 A at 24 V, 3 A at 120 V, 2 A at 230 V, and 1 A at 400 V. These are the make/break capacities for the signal circuit — useful for PLC inputs, alarm annunciators, or contactor coil control in the same panel.
Mounting and wiring flexibility
Mounting position is flexible: the relay can be rotated ±135° on a vertical mounting surface and tilted ±45° front-to-back, which helps when fitting into tight panel layouts or existing busbar arrangements. Dimensions are 70 mm wide × 120 mm high × 140 mm deep — a standard S3 footprint that matches the SIRIUS contactor range. Main circuit terminals accept screw-type connections for stranded wire: 2× (10 … 50 mm²) or 10 … 70 mm² single, and AWG equivalents 2× (10 … 1/0) or 1× (10 … 2/0). Auxiliary and control circuit terminals take 2× (0.5 … 1.5 mm²) solid or 2× (0.75 … 2.5 mm²) stranded, with AWG 2× (20 … 16) or 2× (18 … 14). This covers the full range of motor power wiring and control cabling in a typical MCC bucket.
Substance prohibitance date of 07/01/2006 aligns with early RoHS compliance; the ATEX certification (DMT 98 ATEX G 001) provides the documentation needed for hazardous-area installations.