Set the dial of the Siemens 3RV2031-4TA10 anywhere between 12 … 17 A: this size S2 SIRIUS 3RV2 circuit breaker protects the motor against overload (CLASS 10) and trips instantly at 260 A on a short circuit. Per Siemens it suits motors of about 7.5 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 | 3RV2031-4TA10 |
|---|---|
| Product | SIRIUS 3RV2 circuit breaker for motor protection |
| Size | S2 |
| Overload release setting range | 12 … 17 A |
| Instantaneous short-circuit release | 260 A |
| Trip class | CLASS 10 |
| Rated current | 17 A |
| Motor power AC-3 at 400 V | 7.5 kW |
| Motor power AC-3 at 230 V | 4 kW |
| Motor power, 3-phase 460/480 V (UL) | 15 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) | 14.5 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 | 1.075 kg |
| Condition | New, original Siemens |
Typical applications
- Motor branch circuits with full-load currents between 12 … 17 A
- Transformer and control circuit protection where a motor-type characteristic is acceptable
- Fuseless motor starters with SIRIUS 3RT2 contactors
- Replacement of a tripped or damaged 3RV2 breaker
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 replace a fuse and overload relay?
Yes. A motor starter protector provides both short-circuit and overload protection, so in a typical starter it replaces the fuses and the separate overload relay.
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.
Does it include auxiliary contacts?
No. This version has no auxiliary contacts installed; add a 3RV2901 auxiliary switch if you need feedback to the PLC.
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.
Before you order
Compare the complete order number on the old unit with this page, including the suffix: in most ranges the last characters set the coil voltage, current range or version. If the label is worn, send us a photo and we will identify the part.
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.
