Siemens Circuit breaker for motor protection, size S0 Part number 3RV2021-4PA10

Product Overview

The Siemens circuit breaker size S0 for motor protection, Class 10 A-release 30…36 A, N-release 432 A, screw terminal, standard switching capacity, article number 3RV2021-4PA10, is a motor protection circuit breaker designed for the protection and switching of three-phase motors. This device combines thermal overload protection with magnetic short-circuit protection in a compact S0 frame, providing reliable safeguarding of motors and feeder circuits in industrial control and automation systems.

Key Features

• Circuit breaker for motor protection, size S0
• Class 10 thermal overload release
• Adjustable overload current range from 30 A to 36 A
• Magnetic short-circuit release (N-release)
• Screw terminal connections
• Standard switching capacity
• Compact design suitable for control panels
• Manual ON/OFF switching and isolation capability

Technical Specifications

• Article Number: 3RV2021-4PA10
• Product Family: SIRIUS 3RV2 Motor Protection Circuit Breakers
• Device Type: Motor protection circuit breaker
• Frame Size: S0
• Thermal Release Class: Class 10
• Adjustable Current Range: 30…36 A
• Magnetic Release (N-release): 432 A
• Number of Poles: 3
• Connection Type: Screw terminals
• Rated Operational Voltage: up to 690 V AC
• Rated Frequency: 50/60 Hz
• Switching Capacity: Standard
• Mounting: DIN rail or panel mounting
• Degree of Protection: IP20 when installed

Compliance & Standards

• Designed according to Siemens requirements for motor protection devices
• Suitable for industrial low-voltage motor protection applications
• Complies with applicable IEC and EN standards for motor protection circuit breakers

Applications

The Siemens 3RV2021-4PA10 motor protection circuit breaker is used to protect three-phase motors against overload and short-circuit conditions. Typical applications include motor feeders in control panels, motor control centres, and industrial automation systems where reliable motor protection, switching, and isolation are required.