Siemens Circuit breaker for motor protection, screw, size S2 Part number 3RV2031-4PB10

Product Overview

The Siemens 3RV2031-4PB10 is a SIRIUS 3RV2 motor protection circuit breaker, size S2, designed for reliable overload and short-circuit protection of three-phase motors. With an adjustable thermal setting range of 28…36 A and a magnetic trip rating of 520 A, it is suitable for medium-power motor applications. It features screw-type terminals for secure connection and can be used standalone or as part of a motor-starter combination alongside contactors or soft starters.

Key Features

• SIRIUS 3RV2 motor protection circuit breaker
• Device size S2 — suited for medium-duty motor circuits
• Adjustable thermal overload setting: 28…36 A
• Magnetic short-circuit release: 520 A (N-release)
• Suitable for direct motor protection or feeder protection
• Screw terminals for robust industrial wiring
• Standard switching capacity for AC motor applications
• Compatible with Siemens contactors for full motor-starter assemblies

Technical Specifications

• Article Number: 3RV2031-4PB10
• Product Type: Motor protection circuit breaker
• Size: S2
• Thermal Overload Range: 28…36 A adjustable
• Short-Circuit Release: 520 A magnetic trip
• Connection Type: Screw terminal
• Mounting: DIN rail or panel installation
• Application: Motor protection, feeder protection, overload & short-circuit switching

Compliance & Standards

• Part of the Siemens SIRIUS 3RV2 family of motor protection devices
• Designed for IEC motor protection applications
• Supports use in industrial control panels and automation systems

Applications

Ideal for protecting three-phase motors in industrial machinery, conveyors, pumps, compressors, HVAC systems and general motor control installations. Suitable for standalone protection or combined with contactors/soft starters to create compact motor-starter assemblies where adjustable overload and dependable short-circuit protection are required.