S3 frame, Class 10 trip — what that means for your motor circuit
The 3RU2146-4JD1 is a SIRIUS thermal overload relay in the S3 frame size — the physical envelope that tells you which contactor it mates with and how much panel space it needs (70 mm wide, 120 mm high, 140 mm deep).
Motor power match at common line voltages
At 480 V the relay carries 52 A; at 600 V it carries 62 A — useful for North American 480/600 V installations where the motor FLA falls in that range.
Auxiliary contact ratings for PLC and control circuits
The auxiliary contact handles 2 A at 24 V and 2 A at 230 V — the two voltages most common for PLC input modules and control relays. At 120 V it's rated 3 A, which covers most North American control transformer circuits without a contact rating derate. Higher-voltage ratings drop off: 1 A at 400 V, 0.75 A at 690 V — fine for signal feedback to a VFD or remote I/O, but not for power switching.
Environmental range and temperature compensation
Temperature compensation is active from -40 to +60 °C, meaning the trip curve stays accurate without manual adjustment across that band — relevant for enclosures near steam lines or chillers.
Lifecycle and sourcing — active production, quoted to order
Substance prohibitance date of 03/01/2017 confirms RoHS/REACH compliance documentation exists — relevant for EU and pharmaceutical validation dossiers.