Siemens SIRIUS 3RV2 Motor Starter Protector 1.8-2.5A 3RV2021-1CA10

The Siemens SIRIUS 3RV2021-1CA10 is a high-performance motor starter protector / circuit breaker designed for reliable overload and short-circuit protection of motors and electrical systems. Part of the renowned SIRIUS 3RV2 series, this 3-pole device features an adjustable rated operational current from 1.8 to 2.5 A, making it ideal for precise protection in industrial applications.

Advantages

Robust thermal overload release with magnetic short-circuit release ensures dependable protection. High breaking capacity of 100 kA at 400 V AC provides safety in demanding environments. Compact design for DIN rail mounting saves space in control cabinets. Long electrical and mechanical service life reduces maintenance costs.

Suitable for

• Motor protection in industrial machinery
• Control panels and distribution boards
• Pumps, fans, conveyors, and compressors
• Automation systems requiring reliable circuit protection

Key specifications

• Product Type: Motor Starter Protector / Circuit Breaker
• Series: SIRIUS 3RV2
• Number of Poles: 3-pole
• Rated Operational Current (Adjustable): 1.8 - 2.5 A
• Overload Release Type: Thermal
• Short-circuit Release Type: Magnetic, instantaneous
• Short-circuit Release Setting: Approx. 33 A (13 x In)
• Trip Class: CLASS 10
• Rated Operational Voltage (Ue): Up to 690 V AC
• Rated Insulation Voltage (Ui): 690 V
• Rated Impulse Withstand Voltage (Uimp): 6 kV
• Rated Short-Circuit Breaking Capacity (Icu) at 400V: 100 kA
• Connection Type: Screw terminals
• Mounting Type: DIN rail (35 mm) / Screw fixing
• Protection Class (IP): IP20 (terminals)
• Operating Temperature Range: -20 to +60 °C
• Electrical Service Life: 100,000 switching cycles
• Mechanical Service Life: 10,000,000 switching cycles
• Standard Compliance: IEC 60947-2, IEC 60947-4-1
• Auxiliary Contacts: Not integrated (can be added externally)

Recommendations

For optimal performance, pair with appropriate auxiliary contact modules and ensure correct current setting according to motor full-load current. Always follow local electrical codes and manufacturer guidelines for installation.