Home › Manufacturers › Siemens › 5SJ4125-7HG40

Siemens

Siemens 5SJ4125-7HG40 Miniature Circuit Breaker - 1-Pole, C-Curve, 25A

Siemens 5SJ4125-7HG40 1-pole Miniature Circuit Breaker, 25A

● In Stock 12-Mo Warranty Same-Day Dispatch Ships Worldwide 🎖 Veteran-Owned

In Stock — Ready to Ship

ManufacturerSiemens

Part number5SJ4125-7HG40

Poles 1

Current Rating 25A

Voltage Rating 240V

Breaking Capacity 14kA

Get a price for 5SJ4125-7HG40

Response within 1 business hour

🛡

12-month warranty

All units tested

⚡

Same-day dispatch

Order by 2pm CST

🌐

Worldwide delivery

US, EU, Asia, Middle East

🎖

Veteran-owned

CAGE: 9NK75

1-pole protection C-curve tripping 14kA breaking capacity UL 489 certified Equal polarity Suitable for inductive loads

Product description

The Siemens 5SJ4125-7HG40 is a 1-pole miniature circuit breaker featuring a C-curve tripping characteristic, ideal for applications with higher inrush currents. It operates at 240V with a substantial breaking capacity of 14kA and is certified to UL 489 standards. The rated current for this unit is 25A.

This circuit breaker is widely used in industrial settings to protect inductive loads, motors, and lighting circuits where temporary overcurrents are expected. It is essential for ensuring the safety and operational continuity of electrical systems in manufacturing, commercial facilities, and power distribution networks.

Source your automation needs from Stanlo Automation, a veteran-owned distributor specializing in surplus industrial parts. We offer quality components like the Siemens 5SJ4125-7HG40, ensuring you receive reliable solutions at competitive prices.

Technical specifications

Poles	1
Current Rating	25A
Voltage Rating	240V
Breaking Capacity	14kA
Curve Type	C
Standard	UL 489
Width	70 mm

Common applications

Motor protection

Lighting circuits

Industrial control panels

Power distribution

Manufacturing

Commercial electrical systems

Compatible systems

Compatible with Siemens 5SJ series accessories and standard DIN rail mounting systems.

Also known as

Siemens 5SJ4125-7HG40 Siemens C-curve breaker

Replaces / compatible with

A suitable replacement for Siemens miniature circuit breakers with similar electrical ratings and UL 489 compliance, particularly for C-curve applications.

Technical note

Expert tip

The C-curve provides a tripping range between 5 and 10 times the rated current, making it ideal for circuits with moderate surge currents.

What happens next?

Email confirmation

Immediate receipt acknowledgment sent to you

Account manager assigned

Confirms your part's spec and condition

Your quote delivered

Tailored to your specific requirements

Frequently asked questions

What type of loads is the Siemens 5SJ4125-7HG40 circuit breaker best suited for?

The Siemens 5SJ4125-7HG40, with its C-curve tripping characteristic, is well-suited for protecting inductive loads such as motors and transformers. This curve allows for higher inrush currents without nuisance tripping, while still providing overcurrent protection.