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Siemens 5SY4310-8 Miniature Circuit Breaker — 3-Pole, 10A, D Curve

Siemens 5SY4310-8 Miniature Circuit Breaker, 3-Pole, 10A, D Curve

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ManufacturerSiemens

Part number5SY4310-8

Voltage 400V AC

Current 10A

Poles 3

Breaking Capacity 10kA

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3-pole breaker D trip curve for high inrush 10kA fault current 400V AC rating 70mm installation width

Product description

The Siemens 5SY4310-8 is a 3-pole miniature circuit breaker designed for robust overcurrent protection. It features a D trip curve, rated for 10A with a 10kA breaking capacity at 400V. The unit is built with a standard 70mm width for easy integration.

This circuit breaker is specifically suited for applications with very high inrush currents, such as large motors, transformers, and capacitor banks. Its D curve ensures it does not trip under normal starting surges, providing reliable protection for heavy industrial equipment.

Stanlo Automation, a veteran-owned supplier of surplus industrial parts, offers the Siemens 5SY4310-8. We provide efficient and economical solutions to keep your automation systems running smoothly.

Technical specifications

Voltage	400V AC
Current	10A
Poles	3
Breaking Capacity	10kA
Trip Curve	D
Width	70mm

Common applications

Motor Starting

Industrial Machinery

Heavy Loads

Power Distribution

Equipment Protection

Compatible systems

Heavy industrial machinery Large motor circuits High inrush applications

Also known as

Siemens 5SY43108 Siemens D curve 10A breaker

Replaces / compatible with

The 5SY4310-8 is part of Siemens' 5SY series. It is suitable for replacing other 10A, 3-pole breakers with a D curve in similar applications.

Technical note

Expert tip

Ensure the circuit design accounts for the D-curve's higher trip threshold to prevent nuisance tripping during normal operation.

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Frequently asked questions

When should I use a Siemens 5SY4310-8 with a D curve?

You should use the Siemens 5SY4310-8 with a D curve when protecting circuits with significant inrush currents, typically from motor start-ups, large transformers, or capacitor banks. The D curve allows for inrush currents up to 20 times the rated current before tripping.