Siemens Circuit breaker for motor protection, screw, size S0 Part number 3RV2021-1HA10

Product Overview

The Siemens 3RV2021-1HA10 is a SIRIUS 3RV2 motor protection circuit breaker designed to protect three-phase motors against overloads, short circuits, and phase failure. It combines a manual rotary ON/OFF operating mechanism with a thermal-magnetic trip unit featuring a Class 10 overload characteristic. With an adjustable current setting range of 5.5 A to 8 A, this device provides precise and reliable motor protection in industrial control and automation applications.

Key Features

• SIRIUS 3RV2 motor protection circuit breaker
• Thermal-magnetic trip unit with Class 10 overload characteristic
• Adjustable current setting range from 5.5 A to 8 A
• 3-pole design for full three-phase motor protection
• Manual rotary ON/OFF operating mechanism
• Phase-failure sensitive thermal release
• Screw terminals for secure main circuit connections
• Expandable with auxiliary contacts and accessories

Technical Specifications

• Article Number: 3RV2021-1HA10
• Product Family: SIRIUS 3RV2 Motor Protection Circuit Breakers
• Number of Poles: 3
• Adjustable Current Range: 5.5 A – 8 A
• Trip Class: Class 10
• Rated Insulation Voltage: 690 V
• Rated Operational Voltage: up to 690 V AC
• Rated Frequency: 50/60 Hz
• Surge Withstand Voltage: 6 kV
• Mechanical Endurance: approx. 100,000 switching cycles
• Electrical Endurance: approx. 100,000 switching cycles
• Connection Type: Screw terminals
• Mounting: DIN rail or panel mounting
• Phase Loss Sensitivity: Yes

Compliance & Standards

• Designed in accordance with IEC and EN standards for low-voltage protective devices
• Meets Siemens requirements for motor protection and switching devices
• Suitable for industrial and commercial motor control applications

Applications

The Siemens 3RV2021-1HA10 motor protection circuit breaker is used for the protection and manual switching of three-phase motors such as pumps, fans, compressors, and conveyors. It is commonly installed in motor control centers, automation panels, and industrial distribution boards where reliable overload and short-circuit protection combined with compact design is required.