Siemens
Siemens 5SJ4303-7HG42 3-Pole C-Curve Circuit Breaker — 3A 480Y/277V
Siemens 5SJ4303-7HG42 3-pole Miniature Circuit Breaker
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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 application
Compact design
Product description
The Siemens 5SJ4303-7HG42 is a 3-pole circuit breaker with a C-curve tripping characteristic, rated for 3A. It offers a breaking capacity of 10kA and is compliant with UL 489 standards for 480Y/277V systems.
This breaker is suitable for protecting circuits with moderate inrush currents, such as lighting and general-purpose loads, in industrial and commercial environments. Its 3-pole design provides simultaneous protection for all three phases.
Stanlo Automation, a veteran-owned surplus distributor, provides reliable access to the Siemens 5SJ4303-7HG42. We ensure quality and availability for your automation needs.
Technical specifications
| Poles | 3 |
| Current Rating | 3A |
| Tripping Characteristic | C |
| Breaking Capacity | 10kA |
| Voltage Rating | 480Y/277V |
| Standard | UL 489 |
Common applications
Industrial control
Power distribution
Lighting protection
Commercial installations
Machinery circuits
Motor protection
Compatible systems
Industrial control panels
480V power distribution
277V lighting circuits
Also known as
Siemens 5SJ4303-7HG42 breaker
Siemens 3A C-curve 480V breaker
5SJ4 Series 3-pole breaker
Replaces / compatible with
This circuit breaker is a direct replacement for other Siemens 5SJ4 series breakers with identical specifications.
Technical note
Expert tip
When used in 480Y/277V systems, the 5SJ4303-7HG42 provides protection for phase-to-neutral and phase-to-phase faults.What happens next?
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2
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Frequently asked questions
What is the voltage rating for the Siemens 5SJ4303-7HG42 circuit breaker?
The Siemens 5SJ4303-7HG42 circuit breaker is rated for 480Y/277V according to UL 489 standards. This dual rating makes it suitable for both 3-phase (480V) and single-phase (277V) systems commonly found in industrial and commercial settings.