Siemens SIRIUS 3RV1021-1CA10 Motor Protection Circuit Breaker

Description

The Siemens 3RV1021-1CA10 is a compact and reliable motor protection circuit breaker from the SIRIUS product family. Designed for motor and plant protection, this device offers an adjustable current setting from 1.8 to 2.5 A. It provides dependable protection against short circuits and overloads, helping to prevent costly downtime and extend the life of your motor-driven equipment. This unit is size S00 and features standard switching capacity with screw terminals for secure connections.

Specifications

• Manufacturer: Siemens
• Product Line: SIRIUS
• Model: 3RV1021-1CA10
• Type: Motor Protection Circuit Breaker
• Size: S00
• Overload Release Current Setting: 1.8 to 2.5 A
• Short-Circuit Release: 33 A (Non-adjustable)
• Trip Class: CLASS 10
• Rated Operational Voltage (Ue): up to 690V AC
• Frequency: 50/60 Hz
• Terminals: Screw Terminals

Label Info

• EAN: 4011209281127
• Short-circuit breaking capacity (Icu) at 400V: 100 kA
• Short-circuit breaking capacity (Icu) at 690V: 8 kA

Application

This motor starter protector is suitable for a wide range of industrial applications, including protecting conveyor systems, pumps, fans, and other small three-phase motors. Its precise overload settings ensure optimal protection for your specific application.

Country of Origin

Made in Germany.

CO2 Impact

Opting for this reconditioned component saves approximately 12.0 kg of CO2 compared to a new one, promoting a more sustainable industrial environment.

Availability

This is an obsolete item but is available from our stock. The modern equivalent for new installations is the Siemens 3RV2011-1CA10. Order now from PLC2Day for expert support and fast delivery.

FAQ

The "CLASS 10" rating specifies the trip curve for thermal overload protection. It means the breaker will trip within 10 seconds when the current reaches 6 times the set value, which is suitable for standard motor starting applications.

Yes, it is possible to use this 3-pole breaker for single-phase applications. However, you must ensure all three poles are wired in series to maintain the correct thermal overload sensing and protection characteristics. Refer to the Siemens manual for the correct wiring diagram.

The short-circuit breaking capacity depends on the voltage. For the 3RV1021-1CA10, the Icu is 100 kA at 400V AC and 8 kA at 690V AC, as indicated on the product label. This makes it suitable for applications with high potential fault currents.

Last Update: Friday, March 13, 2026

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