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Siemens 5SJ4218-8HG42 SENTRON Circuit Breaker | 15A 2-Pole 480Y/277V Type D

Siemens 5SJ4218-8HG42 2-Pole Miniature Circuit Breaker

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ManufacturerSiemens

Part number5SJ4218-8HG42

Poles 2

Current Rating 15A

Voltage Rating 480Y/277V AC

Interrupting Capacity 10kA

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2-pole design 15A current rating 10kA interrupting capacity Type D tripping characteristic 480Y/277V rating UL 489 listed

Product description

The Siemens 5SJ4218-8HG42 is a 2-pole miniature circuit breaker from the SENTRON series, designed for robust branch circuit protection. It operates at 480Y/277V AC with a 15A current rating and features a 10kA interrupting capacity. This breaker is distinguished by its Type D tripping characteristic, which is ideal for circuits with high inrush currents.

Compliant with UL 489 standards, this circuit breaker provides reliable protection against overloads and short circuits in demanding industrial environments. Its compact size and DIN rail mounting ensure easy integration into control panels and electrical cabinets.

Stanlo Automation, a veteran-owned surplus distributor, offers the Siemens 5SJ4218-8HG42. We provide quality surplus industrial automation parts, ensuring you can source necessary components for your maintenance and operational needs with confidence.

Technical specifications

Poles	2
Current Rating	15A
Voltage Rating	480Y/277V AC
Interrupting Capacity	10kA
Tripping Curve	D
Mounting	DIN Rail
Standards	UL 489

Common applications

High inrush load circuits

Industrial automation

Control panels

Electrical distribution

Branch circuit protection

Compatible systems

Suitable for installation in industrial control panels and electrical systems requiring UL 489 compliant protection for high inrush current loads.

Also known as

Siemens SENTRON 5SJ4218-8HG42 5SJ42188HG42 Siemens 15A Type D breaker

Replaces / compatible with

This circuit breaker is designed for high inrush loads and can replace other Siemens 5SJ4 series breakers with similar Type D characteristics and ratings.

Technical note

Expert tip

The D-trip characteristic provides a magnetic trip point typically set between 10 to 20 times the rated current, suitable for high inductive loads.

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Frequently asked questions

Why choose a Type D tripping curve for the Siemens 5SJ4218-8HG42?

The Type D tripping curve is specified for the Siemens 5SJ4218-8HG42 to accommodate circuits with high inrush currents, such as those found in motor starting applications. This prevents nuisance tripping while still providing effective protection against short circuits.