Overview
The Siemens 3RV1021-1CA10 is a thermal/magnetic motor protection circuit breaker in the SIRIUS 3RV1 compact protector series. Rated for 1.8–2.5A with a 100 kA interrupt capacity and dual-pole 3-pole configuration, this unit provides reliable overload and short-circuit protection for motors rated in this current range. The rotary dial setting allows field adjustment to match specific motor FLA (full load amperage) requirements, making it ideal for OEMs, system integrators, and maintenance technicians.
Key Features
- Compact size S0 for space-constrained applications
- Class 10 thermal tripping characteristic for accurate motor protection
- Built-in heater elements providing thermal overload sensing
- 100 kA short-circuit interrupt rating at 690 VAC/VDC
- Rotary dial FLA adjustment: 1.8–2.5A
- Screw terminal connections for reliable wiring
- IEC 60947 and VDE 0660 certified for industrial safety standards
Technical Specifications
- Part Number: 3RV1021-1CA10
- Manufacturer: Siemens
- Product Line: SIRIUS 3RV1
- Circuit Breaker Type: Motor Protection (Thermal/Magnetic)
- A-Release (Thermal) Range: 1.8–2.5A
- N-Release (Short-Circuit): 33A
- Interrupt Rating: 100 kA at 690 VAC/VDC
- Trip Class: Class 10
- Number of Poles: 3
- Voltage Rating: 690 VAC / VDC
- Terminal Type: Screw
- Certification: IEC 60947, VDE 0660
- Size Category: S0
- Condition: New in Box
Typical Applications
The 3RV1021-1CA10 is widely used in industrial motor control systems requiring adjustable overload and short-circuit protection. Common applications include:
- Small to medium AC motor protection (1.8–2.5A motors)
- Manufacturing and process automation
- Machinery and equipment drive circuits
- Panel-mount motor starter assemblies
- Industrial control switchboards
Compatibility & Replacements
Compatible With
- SIRIUS 3RV1 contactor assemblies
- Standard 3-pole motor starters
- Industrial control panels operating at 690 VAC/VDC
- IEC 60947-compliant control systems
Replaces / Drop-In Replacement For
The 3RV1021-1CA10 is part of the legacy SIRIUS 3RV1 series. Note: Siemens has phased out the 3RV1 series in favor of the newer SIRIUS 3RV2 product line. The preferred successor model is 3RV2011-1CA10, which maintains similar electrical characteristics and mounting footprints but features enhanced trip accuracy. Verify compatibility with your system integrator before ordering a replacement unit.
Works With
- AC-3 duty motor control systems (IEC 60947-4-1)
- Standard DIN rail and panel-mount installations
- Manual or magnetic contactor assemblies
- Industrial motor protection schemes per VDE 0660
