Siemens SIRIUS 3RV2 Motor Starter Protector 9-12.5A 3RV2021-1KA10

The Siemens SIRIUS 3RV2021-1KA10 is a compact motor starter protector / circuit breaker from the SIRIUS 3RV2 series, size S00. It features a thermal-magnetic A-release with an adjustable current setting range of 9 to 12.5 A, making it ideal for protecting motors and loads against overload and short-circuit. With a rated operational current of 12.5 A at AC-3, 400 V, and a high breaking capacity of 100 kA at 400 V, this 3-pole device ensures reliable protection in industrial environments.

Advantages

High short-circuit breaking capacity (100 kA at 400 V) ensures safety and equipment protection. Adjustable thermal overload setting allows precise matching to motor full-load current. Compact S00 size saves space in control cabinets. Suitable for both DIN rail and screw mounting.

Suitable for

• Motor protection in industrial automation
• Switchgear and controlgear assemblies
• Protection of transformers, pumps, fans, and conveyors

Key specifications

• Product type: Motor Starter Protector / Circuit Breaker
• Series: SIRIUS 3RV2
• Size: S00
• Number of poles: 3-pole
• Rated operational current (Ie): 12.5 A (at AC-3, 400 V)
• Adjustable current setting range (thermal overload): 9 ... 12.5 A
• Instantaneous short-circuit setting (magnetic): 163 A
• Rated operational voltage (Ue): 690 V AC
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Rated ultimate short-circuit breaking capacity (Icu) at 400 V: 100 kA
• Rated service short-circuit breaking capacity (Ics) at 400 V: 100 kA
• Tripping characteristic: Thermal-magnetic (A-release)
• Mounting type: DIN rail (35 mm) / Screw mounting
• Connection type: Screw terminals
• Protection class (IP): IP20 (front), IP00 (terminals)
• Ambient temperature (operation): -20 to +60 °C
• Electrical endurance: 100,000 switching cycles
• Mechanical endurance: 10,000,000 switching cycles

Recommendations

For optimal performance, use with Siemens SIRIUS 3RV2 accessories such as auxiliary switches, undervoltage releases, and shunt releases. Ensure proper mounting and wiring according to the manufacturer's instructions.