Siemens SIRIUS 3RV2 Motor Starter Protector 0.45-0.63A 3RV2021-0GA10

With a short-circuit breaking capacity of 100 kA at 400 V, this motor starter protector from Siemens' SIRIUS 3RV2 series ensures reliable protection for motors up to 0.63 A. The 3RV2021-0GA10 combines thermal overload and magnetic short-circuit releases in a compact S00 frame, making it ideal for industrial motor control applications.

Overview

The Siemens 3RV2021-0GA10 is a 3-pole motor starter protector designed for direct mounting on 35 mm DIN rail or screw fixing. It features an adjustable thermal overload release with a current setting range of 0.45 to 0.63 A, and a fixed magnetic short-circuit release at 8.2 A. The device is rated for operational voltages up to 690 V AC and offers a high breaking capacity, ensuring safe interruption of fault currents.

What stands out

• High breaking capacity of 100 kA at 400 V AC for robust short-circuit protection.
• Compact S00 size saves space in control panels while delivering full motor protection.
• Thermal and magnetic releases provide comprehensive protection against overloads and short circuits.
• Wide ambient temperature range from -20°C to +60°C allows use in harsh environments.
• Long mechanical service life of 10 million switching cycles reduces maintenance needs.

Technical details

• Series: SIRIUS 3RV2, Size S00
• Current setting range: 0.45 - 0.63 A
• Instantaneous short-circuit release: 8.2 A
• Number of poles: 3
• Rated operational voltage: 690 V AC
• Rated insulation voltage: 690 V
• Rated impulse withstand voltage: 6 kV
• Short-circuit breaking capacity at 400 V: 100 kA
• Connection type: Screw terminal
• Mounting: DIN rail (35 mm) or screw fixing
• Protection class: IP20 (terminals), IP00 (main circuit)
• Ambient temperature: -20 to +60 °C
• Overload release: Thermal
• Short-circuit release: Magnetic
• Electrical service life: 100,000 switching cycles
• Mechanical service life: 10,000,000 switching cycles
• Standards: IEC 60947-2, IEC 60947-4-1

Our verdict

The Siemens 3RV2021-0GA10 is a reliable and compact motor starter protector that delivers high performance in a small footprint. Its precise adjustable thermal release and high breaking capacity make it an excellent choice for protecting small motors in industrial applications.