Siemens 5SJ4320-7HG42 Sentron Miniature Circuit Breaker 3-Pole, 20A, C-Curve, 10kA, UL 489 Original Brand New

Overview

The Siemens 5SJ4320-7HG42 is part of the esteemed Sentron family, specifically engineered for the North American market and global industrial applications. This 3-pole miniature circuit breaker (MCB) provides reliable overcurrent and short-circuit protection for electrical installations.

Because it meets the stringent UL 489 requirements, it can be used as a “branch protector,” meaning it is suitable for protecting end-use equipment and feeder circuits in complex industrial environments.

Key Benefit

• Global Compliance: Meets UL 489, CSA, and IEC standards, making it ideal for export-oriented machine building.

• Compact Design: The 3-pole configuration saves valuable DIN rail space in control cabinets.

• Enhanced Safety: Features a 10kA interrupting rating to prevent damage during high-fault current events.

• Easy Installation: Designed for fast mounting on standard 35mm DIN rails with secure terminal connections.

Function

• Overload Protection: Protects conductors from overheating due to sustained excessive current.

• Short-Circuit Protection: Instantaneous tripping in the event of a short circuit via the magnetic release.

• C-Curve Trip Characteristic: Optimized for circuits with medium inrush currents, such as small motors, lighting loads, and control circuits.

Technical Specification

• Manufacturer: Siemens

• Product Number: 5SJ4320-7HG42

• Type: Miniature Circuit Breaker (MCB)

• Number of Poles: 3

• Rated Current: 20A

• Tripping Curve: C Curve

• Breaking Capacity: 10kA

• Standard: UL 489

• Rated Voltage: 480Y/277V

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