Siemens
Siemens 5SJ4304-7HG42 3-Pole C-Curve Circuit Breaker — 4A 480Y/277V
Siemens 5SJ4304-7HG42 3-pole Miniature Circuit Breaker
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12-Mo Warranty
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12-month warranty
All units tested
Same-day dispatch
Order by 2pm CST
Worldwide delivery
US, EU, Asia, Middle East
Veteran-owned
CAGE: 9NK75
3-pole protection
C-curve for moderate inrush
10kA interrupting rating
UL 489 certified
Versatile use
Compact form factor
Product description
The Siemens 5SJ4304-7HG42 is a 3-pole miniature circuit breaker featuring a C-curve tripping characteristic and a 4A current rating. It provides a 10kA breaking capacity and adheres to UL 489 standards for 480Y/277V electrical systems.
This circuit breaker is suitable for circuits with moderate inrush currents, such as lighting, general purpose outlets, and small appliances. Its 3-pole design ensures comprehensive protection across three phases.
Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 5SJ4304-7HG42. We provide reliable access to quality industrial automation components.
Technical specifications
| Poles | 3 |
| Current Rating | 4A |
| Tripping Characteristic | C |
| Breaking Capacity | 10kA |
| Voltage Rating | 480Y/277V |
| Standard | UL 489 |
Common applications
Lighting circuits
Power distribution
Commercial installations
Control panels
Machinery circuits
General purpose circuits
Compatible systems
Industrial control panels
480V power distribution
277V lighting systems
Also known as
Siemens 5SJ4304-7HG42 breaker
Siemens 4A C-curve 480V breaker
5SJ4 Series 4A 3-pole breaker
Replaces / compatible with
This circuit breaker is designed to directly replace other Siemens 5SJ4 series breakers with identical electrical and physical specifications.
Technical note
Expert tip
For applications with higher inrush currents, consider a D-curve breaker such as the Siemens 5SJ4304-8HG42.What happens next?
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Frequently asked questions
What is the function of the C-curve in the Siemens 5SJ4304-7HG42 circuit breaker?
The C-curve tripping characteristic of the Siemens 5SJ4304-7HG42 allows it to handle moderate inrush currents, typically encountered when switching on devices like fluorescent lighting or small motors. This prevents nuisance tripping while still providing protection against overloads and short circuits.