For motors with a full-load current between 0.18 … 0.25 A, the Siemens 3RU2116-0CB0 is the size S00 SIRIUS 3RU2 bimetal overload relay, trip CLASS 10, designed to plug straight onto a 3RT2 contactor. 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.
At 0.18 … 0.25 A this relay suits motors of roughly 0.06 kW at 400 V (per the Siemens AC-3 rating), but the setting must always follow the nameplate current, not the kW value.
See our Siemens industrial controls for matching 3RT2 contactors in size S00.
Technical data
| Siemens order number | 3RU2116-0CB0 |
|---|---|
| Product | SIRIUS 3RU2 thermal overload relay |
| Size | S00 |
| Current setting range | 0.18 … 0.25 A |
| Trip class | CLASS 10 |
| Auxiliary contacts | 1 NO + 1 NC |
| Rated operating voltage | 690 V |
| Motor power at 400 V (approx.) | 0.06 kW |
| Mounting | Contactor mounting (size S00) |
| FLA, 3-phase motor at 480 V (UL) | 0.3 A |
| Power loss (hot, total) | 4.8 W |
| Ambient temperature (operation) | -40 … +70 °C |
| Dimensions (W x H x D) | 45 x 76 x 70 mm |
| Net weight | 0.123 kg |
| Condition | New, original Siemens |
Typical applications
- Motor starters with SIRIUS 3RT2 contactors
- Protection of motors with rated current 0.18 … 0.25 A
- Pumps, fans and conveyors in water, HVAC and packaging plants
- Replacement of an aged or damaged overload relay
Compatibility and replacement
Plugs directly onto 3RT2 contactors of size S00 (3RT201x). For separate (stand-alone) mounting Siemens offers a terminal support. If the motor current is at the top of the range, choose the next range up so the setting sits in the middle of the scale.
Frequently asked questions
What motor size does it suit?
Per Siemens the range corresponds to about 0.06 kW at 400 V (AC-3), but always set it by the motor rated current, not by the kW rating.
Can it be mounted on its own?
Yes, with the Siemens terminal support for stand-alone installation; otherwise it plugs straight onto the contactor.
How do I set it?
Turn the setting dial to the motor rated current from the nameplate, within 0.18 … 0.25 A.
Can I get a price and delivery time?
Prices are quoted on request. Send the order number, quantity and delivery country on WhatsApp and we will reply with price and delivery time; air shipping is usually 5 to 7 days once ready, with a 1-year warranty.
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.
Every part RendatSP supplies is new and original, carries a 1-year warranty and ships worldwide by air in 5 to 7 days once ready (shipping, payment and warranty). Send us the order number and quantity on WhatsApp or through the inquiry form and we will quote the same working day. Agents in Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
