SIEMENS SIRIUS 3RV2031-4WA10 Motor Starter Protector, 2.2-3.2 A, Class 10, 690 V AC, 3-Pole, Screw Terminal

Motor circuits demand reliable protection against overloads and short circuits to avoid costly downtime and equipment damage. The SIEMENS SIRIUS 3RV2031-4WA10 motor starter protector delivers exactly that, combining thermal and magnetic releases in a compact S0 frame for dependable safeguarding of three-phase motors up to 690 V AC.

Who is it for

This device is built for panel builders, maintenance technicians, and machine OEMs who need a robust, space-saving motor protection solution. It suits industrial environments where motors are frequently started and stopped, such as conveyors, pumps, fans, and machine tools.

Main features

• Adjustable thermal overload release from 2.2 A to 3.2 A for precise motor protection.
• Fixed magnetic short-circuit release at 42 A for rapid fault clearing.
• Class 10 tripping characteristic ensures fast response to overloads while allowing normal motor starting.
• 3-pole design with screw terminals for secure, maintenance-friendly wiring.
• High short-circuit breaking capacity of 100 kA at 400 V AC for demanding applications.
• Compact S0 size saves space in control cabinets; DIN rail or screw mounting for flexible installation.
• IP20 housing (terminals IP00) suitable for protected industrial environments.

Specifications

• Product type: Motor starter protector (motor protection switch)
• Series: SIRIUS 3RV2
• Size: S0
• Adjustable current range: 2.2 - 3.2 A
• Short-circuit release: 42 A
• Rated operational voltage: max. 690 V AC
• Number of poles: 3
• Connection type: screw terminal
• Degree of protection: IP20 (terminals IP00)
• Rated insulation voltage: 690 V
• Rated impulse withstand voltage: 6 kV
• Short-circuit breaking capacity at 400 V: 100 kA
• Overload release type: thermal
• Short-circuit release type: magnetic
• Ambient operating temperature: -20 to +60 °C
• Electrical endurance: 100,000 switching cycles
• Mechanical endurance: 10,000,000 switching cycles

Tips

For optimal protection, set the adjustable current dial to the motor’s full-load current. Always verify short-circuit coordination with upstream devices according to local regulations. Mount the protector in a well-ventilated enclosure to maintain rated performance.