Siemens 3RU2116-1KB0: a 3RU2 thermal overload relay in size S00 with a setting range of 9.0 … 12.5 A and CLASS 10 tripping, built for contactor mounting. It has 1 NO + 1 NC auxiliary contacts: the NC contact opens the contactor coil circuit on overload and the NO contact can signal the trip to the PLC.
A relay that trips repeatedly is often a sign of a mechanical problem or phase loss, but bimetal relays also age; replacing an old relay with a new one of the same range is a common maintenance task.
See our Siemens industrial controls for matching 3RT2 contactors in size S00.
Technical data
| Siemens order number | 3RU2116-1KB0 |
|---|---|
| Product | SIRIUS 3RU2 thermal overload relay |
| Size | S00 |
| Current setting range | 9.0 … 12.5 A |
| Trip class | CLASS 10 |
| Auxiliary contacts | 1 NO + 1 NC |
| Rated operating voltage | 690 V |
| Motor power at 400 V (approx.) | 5.5 kW |
| Mounting | Contactor mounting (size S00) |
| FLA, 3-phase motor at 480 V (UL) | 12.5 A |
| Power loss (hot, total) | 6.6 W |
| Ambient temperature (operation) | -40 … +70 °C |
| Dimensions (W x H x D) | 45 x 76 x 70 mm |
| Net weight | 0.132 kg |
| Condition | New, original Siemens |
Typical applications
- Protection of motors with rated current 9.0 … 12.5 A
- Replacement of an aged or damaged overload relay
- Motor starters with SIRIUS 3RT2 contactors
- Pumps, fans and conveyors in water, HVAC and packaging plants
Compatibility and replacement
Plugs directly onto 3RT2 contactors of size S00 (3RT201x). For separate (stand-alone) mounting Siemens offers a terminal support. It replaces the earlier 3RU11 series of the same setting range; send us the old order number to confirm.
Frequently asked questions
What motor size does it suit?
Per Siemens the range corresponds to about 5.5 kW at 400 V (AC-3), but always set it by the motor rated current, not by the kW rating.
How do I set it?
Turn the setting dial to the motor rated current from the nameplate, within 9.0 … 12.5 A.
Manual or automatic reset?
The data sheet title lists manual-automatic reset; the mode is selected on the relay front.
How fast can you deliver, and is there a warranty?
Air shipping usually takes 5 to 7 days once the part is ready, to almost any country. Each part is new and original with a 1-year warranty. Message us on WhatsApp with the order number for a quotation.
How to order
Message us the order number and quantity. For breakdowns, tell us the delivery address and we will offer the fastest shipping option. If the exact part is discontinued, we confirm the official successor before quoting.
Need it fast? Send the order number, quantity and delivery country on WhatsApp or through the inquiry form and we reply with a quotation the same working day. All parts are new and original, covered by a 1-year warranty, and ship worldwide by air in 5 to 7 days once ready (shipping, payment and warranty). Local agents: Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
