Siemens Circuit breaker for system protection, screw, size S3, 520A Part number 3RV2742-5GD10

Product Overview

The Siemens 3RV2742-5GD10 is a SIRIUS 3RV2 system protection circuit breaker, size S3, designed for protecting installations and equipment from overload and short-circuit conditions. With an adjustable overload release (A-release) of 40 A and a magnetic instantaneous trip (N-release) of 520 A, it offers reliable protection for feeders, distribution circuits and system components. UL 489 and CSA approvals make it suitable for global and North American panel compliance.

Key Features

• Circuit breaker for system protection – SIRIUS 3RV2 series
• Size S3 construction for higher current applications
• A-release (thermal) = 40 A
• N-release (magnetic) = 520 A
• UL 489 and CSA C22.2 No.5-02 approved
• Suitable for feeder and equipment protection
• Screw terminal connection type
• Compact design – integrates into SIRIUS and control panel systems
• Can be combined with accessories such as auxiliary contacts and trip indication modules

Technical Specifications

• Article Number: 3RV2742-5GD10
• Product Type: System protection circuit breaker
• Breaker Size: S3
• Thermal Release (A-release): 40 A
• Magnetic Release (N-release): 520 A
• Standards/Approval: UL 489, CSA C22.2 No.5-02
• Connection Type: Screw terminals
• Trip Function: Overload + short circuit
• Application Type: System/feeder protection
• Mounting: Front-mount/DIN rail depending on configuration

Compliance & Standards

• UL 489 compliant for feeder protection
• CSA certified for panel installations
• Part of Siemens SIRIUS industrial protection family

Applications

Used for protecting systems, feeders and equipment in industrial and commercial power panels. Suitable for distribution circuits, machine supply protection, branch feeders, control systems and setups requiring UL 489 certified breakers. Ideal for integration in SIRIUS control assemblies and MCC panels.