Siemens Circuit breaker for transformer protection, size S0

Product Overview

The 3RV1421-1EA10 circuit breaker is designed for transformer protection in size S0 applications, featuring A-release protection with an adjustable current range of 2.8 to 4 A and short-circuit release rated at 82 A. This motor starter protector provides specialized overload and short-circuit protection for transformers and electrical loads, incorporating screw terminal connections and standard switching capacity for reliable transformer protection applications.

Important Notice: This product is discontinued as of September 30, 2021. The recommended successor is 3RV2411-1EA10 from the SIRIUS 3RV2 series.

Key Features

• Current Range: 2.8 to 4 A adjustable A-release for transformer protection
• Protection Type: Specialized transformer protection circuit breaker
• Size: S0 (45mm width) for standard installations
• Short-Circuit Release: 82 A factory-set for transformer inrush current handling
• Terminal Type: Screw terminals for secure connections
• Switching Capacity: Standard switching capacity rating
• Application: Optimized for transformer protection applications
• Manual Operation: Manual switching and reset capability
• Operating Temperature: Standard industrial temperature range
• Mounting: DIN rail or screw mounting options
• Weight: 0.356 kg

Technical Specifications

• Frequency Rating: 50/60 Hz
• Rated Operational Voltage: Standard industrial voltage ratings
• Poles: 3-pole configuration
• Conductor Cross-Section: Screw terminal connections
• Installation Altitude: Standard industrial applications
• Degree of Protection: IP20 front face
• Connection System: Screw-type terminals
• Standards Compliance: IEC industrial standards
• Transformer Protection: Specialized for control transformers
• Inrush Current Handling: Optimized trip characteristics for transformer applications

Applications

The 3RV1421-1EA10 was designed specifically for protecting control transformers and electrical loads where specialized transformer protection is required for currents between 2.8-4 A. It provides protection against transformer inrush currents during switching operations and offers reliable overload protection for transformer applications in industrial control systems, power distribution, and electrical panels requiring size S0 transformer protection.

Operation

When an overload occurs, the current rises above the set rated current, activating the thermal protection mechanism designed for transformer characteristics. The specialized short-circuit release at 82 A provides protection while allowing normal transformer inrush currents during energization. The device features manual switching capability with clear position indication for transformer isolation and protection operations.

Product Information

• Net Weight: 0.356 kg
• Packaging Dimensions: 49.00 x 102.00 x 102.00 mm
• EAN: 4011209304604
• UPC: 754554530888
• Country of Origin: Germany
• Product Status: Discontinued (End of lifecycle: 30.09.2021)
• Successor Product: 3RV2411-1EA10

Compliance & Environmental

• RoHS Compliance: Yes (since 01.05.2012)
• IEC Rating: Yes
• WEEE Take-Back: Yes (2012/19/EU)
• REACH Article 33: Contains lead in concentrations higher than 0.1% w/w
• Export Control: ECCN: N / AL: N
• International Standards: IEC industrial standards for transformer protection

Download existing graphical data for this product:

• Technical Data Sheet
• CAx Data & 3D Models
• Equipment Manual
• Dimension Drawings

Additional Resources

• Successor Product 3RV2411-1EA10
• SIRIUS 3RV2 Motor Starter Protectors
• Siemens Industry Mall