S00 frame with spring-clamp wiring
The 3RU2116-1KC1: This is a size S00 thermal overload relay from the SIRIUS family — the smallest frame in the range, at 45 mm wide, 102 mm tall, and 79 mm deep. It mounts in any position and is designed for stand-alone installation, not ganged to a contactor. No screw torque to check — push the ferrule in and the cage holds.
Class 10 trip and motor power ratings
That matches standard motor start profiles for pumps, fans, and compressors where the start time stays under 10 seconds. Current ratings at 480 V and 600 V are both 12.5 A — useful for North American 480 V panels where the motor FLA falls in that range.
Auxiliary contact switching capacity
At 60 V DC it switches 0.3 A, dropping to 0.22 A at 110–125 V DC and 0.11 A at 220 V DC. These are the contact ratings for the trip-signal circuit — the relay's own thermal element handles the motor current. Each pole dissipates 2.2 W at rated current — budget that into the enclosure thermal calculation if multiple relays are stacked.
The MTTF at high demand rate is 2,280 years, which reflects a robust electromechanical design for continuous industrial duty. Storage and transport limits are -55 to +80 °C. The relay carries a substance prohibition date of 10/01/2009, aligning with RoHS and REACH compliance requirements.