Siemens Circuit breaker, screw terminal, size S0 Part number 3RV2021-1KA10

Product Overview

The Siemens SIRIUS Motor Protection Circuit Breaker (SKU: 3RV2021-1KA10) is a size S0 motor starter protector designed for reliable protection of motors and circuits against overload and short-circuit conditions. It provides adjustable thermal and electromagnetic release with a trip class 10 A and features a robust three-pole design for industrial applications.

Key Features

• 3-pole motor protection circuit breaker from the SIRIUS 3RV2 series
• Adjustable overload release range: 9 … 12.5 A
• Instantaneous short-circuit release: 130 A
• Tripping class 10 A
• Rated operational voltage up to 690 V AC
• Screw terminal connection for secure wiring
• Front degree of protection: IP20
• Compact size S0 design for space-saving control panels

Technical Specifications

• Product Type: Motor Protection Circuit Breaker
• Article Number: 3RV2021-1KA10
• Overload Setting Range: 9 … 12.5 A
• Instantaneous Short-Circuit Release: 130 A
• Rated Insulation Voltage: 690 V
• Rated Frequency: 50/60 Hz
• Mechanical Durability: Approx. 100,000 switching cycles
• Operating Temperature: −20 °C to +60 °C
• Storage Temperature: −50 °C to +80 °C
• Mounting: DIN rail (35 mm) or screw mounting
• Protection Class: IP20 (front)
• Weight: Approx. 0.35 kg

Compliance & Certifications

• Conforms to IEC 60947-4-1 and IEC 60947-2 standards
• CE-marked and UL/CSA certified
• RoHS compliant

Applications

The 3RV2021-1KA10 is designed for protecting and controlling three-phase asynchronous motors in industrial automation systems, machinery, and switchboards. It combines overload, short-circuit, and phase-failure protection in a single compact device, ensuring dependable operation and extended motor service life.