Siemens
Siemens 5SJ4304-8HG42 3-Pole D-Curve Circuit Breaker — 4A 480Y/277V
Siemens 5SJ4304-8HG42 3-pole Miniature Circuit Breaker
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Same-day dispatch
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Worldwide delivery
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Veteran-owned
CAGE: 9NK75
3-pole protection
D-curve for high inrush
10kA interrupting rating
UL 489 certified
Motor circuit suitability
Robust construction
Product description
The Siemens 5SJ4304-8HG42 is a 3-pole circuit breaker with a D-curve tripping characteristic and a 4A current rating. It features a 10kA breaking capacity and is compliant with UL 489 standards for 480Y/277V systems.
This breaker is engineered for circuits with high inrush currents, such as those found in motor starting applications. The D-curve ensures reliable operation by preventing nuisance tripping during these transient events.
Stanlo Automation, a veteran-owned surplus distributor, is your reliable source for the Siemens 5SJ4304-8HG42. We offer quality components and dependable service for your automation needs.
Technical specifications
| Poles | 3 |
| Current Rating | 4A |
| Tripping Characteristic | D |
| Breaking Capacity | 10kA |
| Voltage Rating | 480Y/277V |
| Standard | UL 489 |
Common applications
Motor protection
Industrial control
Power distribution
High inrush current loads
Machinery circuits
Automation systems
Compatible systems
Industrial motor control
Machine tool manufacturing
Power distribution units
Also known as
Siemens 5SJ4304-8HG42 breaker
Siemens 4A D-curve 480V breaker
5SJ4 Series 4A D-curve breaker
Replaces / compatible with
This part is a direct replacement for other Siemens 5SJ4 series circuit breakers with identical electrical and physical specifications.
Technical note
Expert tip
The 5SJ4304-8HG42's D-curve provides a trip range of 10 to 20 times the rated current, making it suitable for inductive loads that draw high startup current.What happens next?
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Frequently asked questions
What are the primary applications for the Siemens 5SJ4304-8HG42 D-curve breaker?
The Siemens 5SJ4304-8HG42, with its D-curve, is best suited for applications involving high inrush currents, such as starting electric motors. It provides reliable protection for circuits in industrial machinery, control panels, and power distribution systems where such current surges are common.