Set the dial of the Siemens 3RV2031-4XA10 anywhere between 49 … 59 A: this size S2 SIRIUS 3RV2 circuit breaker protects the motor against overload (CLASS 10) and trips instantly at 845 A on a short circuit. Per Siemens it suits motors of about 30 kW at 400 V and has a rated short-circuit breaking capacity (Icu) of 65 kA at 400 V.
A motor starter protector combines three functions in one device: short-circuit protection, overload protection with phase-failure sensitivity, and manual on/off isolation with a rotary handle. Together with a contactor it forms a complete fuseless motor starter.
See more Siemens industrial controls, including SIRIUS 3RT2 contactors of the same size.
Technical data
| Siemens order number | 3RV2031-4XA10 |
|---|---|
| Product | SIRIUS 3RV2 circuit breaker for motor protection |
| Size | S2 |
| Overload release setting range | 49 … 59 A |
| Instantaneous short-circuit release | 845 A |
| Trip class | CLASS 10 |
| Rated current | 59 A |
| Motor power AC-3 at 400 V | 30 kW |
| Motor power AC-3 at 230 V | 15 kW |
| Motor power, 3-phase 460/480 V (UL) | 40 hp |
| Breaking capacity Icu at 400 V | 65 kA |
| Breaking capacity Ics at 400 V | 30 kA |
| Rated operating voltage | 690 V |
| Phase failure sensitivity | Yes |
| Isolating function | Yes |
| Combinable contactor sizes | S2 |
| Power loss (hot, total) | 26 W |
| Degree of protection (front) | IP20 |
| Ambient temperature (operation) | -20 … +60 °C |
| Mounting | screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715 |
| Dimensions (W x H x D) | 55 x 140 x 149 mm |
| Net weight | 1.185 kg |
| Condition | New, original Siemens |
Typical applications
- Machine-builder panels where a lockable rotary isolator is required
- Replacement of a tripped or damaged 3RV2 breaker
- Motor branch circuits with full-load currents between 49 … 59 A
- Fuseless motor starters with SIRIUS 3RT2 contactors
Compatibility and replacement
Auxiliary switches for status feedback can be added on the front (transverse, for example 3RV2901-1E) or on the left side (3RV2901-1A). For a complete starter combine it with a size S2 3RT2 contactor using the matching Siemens link module.
Frequently asked questions
Can it be locked off?
Yes, the rotary handle can be locked in the OFF position with a padlock, which is required for safe maintenance in many plants.
What motor current can it protect?
The overload release is adjustable from 49 … 59 A. Set it to the rated current shown on the motor nameplate.
Which contactors can it be combined with?
Per Siemens: contactor sizes S2.
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.
Ordering tips
Send us the full order number from the label of the old part, or a clear photo of the label, together with the quantity you need. We check the number against the current manufacturer data before we quote and tell you if there is a newer replacement.
RendatSP ships from Yiwu, China, to factories worldwide; air delivery usually takes 5 to 7 days once the part is ready. The part is new and original with a 1-year warranty (shipping, payment and warranty). For a quotation, message us on WhatsApp with the order number and quantity. We also have agents in Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
