Siemens Motor Protection Circuit Breaker 28-40A 3RV2031-4UA10

Description

The Siemens 3RV2031-4UA10 is a high-performance circuit breaker from the SIRIUS product line, designed for motor protection. This size S2 breaker provides reliable and precise protection for motors against short-circuits and overload. With its adjustable current setting and CLASS 10 trip characteristic, it is suitable for a wide range of standard industrial motor applications.

Specifications

• Manufacturer: Siemens
• Part Number: 3RV2031-4UA10
• Product Line: SIRIUS
• Type: Motor Protection Circuit Breaker
• Size: S2
• Current Setting (Overload Release): 28 to 40 A
• Trip Class: CLASS 10
• Short-Circuit Release (Instantaneous): 520 A
• Rated Operational Voltage (Ue): up to 690V AC
• Terminals: Screw Type
• Poles: 3-Pole

Label Info

• A-Release: 28...40 A
• N-Release: 520 A
• EAN: 4011209945678

Application

This circuit breaker is ideal for protecting three-phase induction motors in various industrial environments, including conveyor systems, pumps, fans, and machine tools. It ensures operational safety by reliably disconnecting the motor in case of a fault.

Country of Origin

Made in Germany.

CO2 Impact

By purchasing this pre-owned component, you contribute to the circular economy and help avoid approximately 37.2 kg of CO2 emissions associated with the production of a new unit.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

CLASS 10 indicates the trip class for overload protection. It means the breaker will trip within 10 seconds at 7.2 times the set rated current. This is suitable for standard motor starting applications, protecting against sustained overloads without nuisance tripping during startup.

Yes, while it is a 3-pole breaker designed for three-phase motors, it can be wired for single-phase applications. To do so, you must wire the single-phase current through all three poles in series to ensure the thermal overload mechanism functions correctly and balanced. Refer to the official Siemens documentation for the correct wiring diagram.

The Siemens 3RV2031-4UA10 has a standard switching capacity. The exact short-circuit breaking capacity (Icu) at 400V AC is 55 kA. This value is critical for ensuring the breaker can safely interrupt a high-level fault current without damage.

PLC2DAY is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners.

Last Update: Friday, March 13, 2026