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Siemens 5SJ4102-8HG40 1-Pole 2A D-Curve Circuit Breaker — 14kA

Siemens 5SJ4102-8HG40 1-pole miniature circuit breaker.

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ManufacturerSiemens

Part number5SJ4102-8HG40

Poles 1

Current Rating 2A

Breaking Capacity 14kA

Tripping Characteristic D

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Veteran-owned

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14kA interrupting capacity D-curve tripping for high inrush UL 489 listed 2A current rating Equal polarity

Product description

The Siemens 5SJ4102-8HG40 is a 1-pole miniature circuit breaker featuring a D-curve tripping characteristic, a 2A current rating, and a high 14kA breaking capacity. This breaker operates at 240V and is UL 489 listed, with the added designation of 'equal polarity'. It provides robust protection for circuits with significant inrush currents.

This circuit breaker is specifically designed for applications with high transient currents, such as those found in motor control, transformer protection, and power supply circuits. The D-curve characteristic allows for higher inrush currents without nuisance tripping, while still offering effective protection against overloads and short circuits.

Stanlo Automation, a veteran-owned business specializing in industrial automation surplus, offers the Siemens 5SJ4102-8HG40. We are committed to providing reliable, tested components and exceptional customer service to help you minimize downtime and optimize your operations.

Technical specifications

Poles	1
Current Rating	2A
Breaking Capacity	14kA
Tripping Characteristic	D
Voltage Rating	240V AC
UL Standard	UL 489
Polarity	Equal

Common applications

Motor starting circuits

Transformer protection

Power supplies

Industrial machinery

High inrush applications

Compatible systems

Motor control centers Industrial automation Power distribution units Heavy machinery

Also known as

Siemens 5SJ4102 5SJ4102-8HG40 breaker Siemens D-curve breaker Siemens equal polarity breaker

Replaces / compatible with

This part is a direct replacement for Siemens 5SJ4102 series circuit breakers with similar specifications and equal polarity requirements. Always verify exact compatibility before replacement.

Technical note

Expert tip

When installing multiple breakers, ensure sufficient spacing according to manufacturer guidelines to prevent heat buildup and maintain performance, especially for the 5SJ4102-8HG40.

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Frequently asked questions

What makes the Siemens 5SJ4102-8HG40 suitable for high inrush current applications?

The Siemens 5SJ4102-8HG40 features a D-curve tripping characteristic. This means it is designed to withstand inrush currents that are significantly higher (10-20 times the rated current) than those handled by C-curve breakers, making it ideal for protecting devices like motors and transformers.