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Siemens 5SY6263-7 Miniature Circuit Breaker - 63A, 2-Pole

Siemens 5SY6263-7 2-pole miniature circuit breaker, 63A.

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ManufacturerSiemens

Part number5SY6263-7

Type Miniature Circuit Breaker

Manufacturer Siemens

Part Number 5SY6263-7

Poles 2

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2-pole high-current protection C-curve trip characteristic 6kA interrupting rating 400V AC operational voltage Standard DIN rail mount

Product description

The Siemens 5SY6263-7 is a heavy-duty miniature circuit breaker built for reliable protection in high-current applications. This 2-pole device features a C-curve tripping characteristic, a rated current of 63A, and a breaking capacity of 6kA at 400V, ensuring robust safety and performance.

This circuit breaker is designed for industrial and commercial power distribution systems where higher current loads are present. Its C-curve is suitable for circuits with moderate inrush currents, making it ideal for main incomer protection or supplying significant loads.

As a veteran-owned surplus parts distributor, Stanlo Automation is your trusted source for industrial automation components. We provide the Siemens 5SY6263-7 and other essential parts, ensuring quick delivery and cost-effective solutions to keep your operations running efficiently.

Technical specifications

Type	Miniature Circuit Breaker
Manufacturer	Siemens
Part Number	5SY6263-7
Poles	2
Rated Current	63A
Tripping Characteristic	C
Rated Voltage	400V AC
Breaking Capacity	6kA
Width	70 mm

Common applications

Industrial main distribution

High-current circuits

Commercial power systems

Large machinery supply

Motor protection (higher HP)

Compatible systems

Standard DIN rail mounting systems

Also known as

Siemens 5SY6263-7 MCB Siemens 63A 2-pole breaker Siemens C-curve 400V 6kA 63A

Replaces / compatible with

Suitable as a replacement for other Siemens 5SY6 series breakers with identical ratings or for upgrading existing electrical installations. Always verify specifications for compatibility.

Technical note

Expert tip

For 63A breakers, ensure that the associated wiring and busbar connections are adequately sized to handle the continuous current and meet local electrical codes.

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Frequently asked questions

What is the significance of the 6kA breaking capacity on the Siemens 5SY6263-7?

The 6kA breaking capacity on the Siemens 5SY6263-7 indicates its ability to safely interrupt fault currents up to 6000 amperes at 400V AC. This rating is crucial for ensuring that the breaker can safely disconnect the circuit during a short circuit without causing damage or posing a safety hazard.