Home › Manufacturers › Siemens › 5SY8663-7

Siemens

Siemens 5SY8663-7 Miniature Circuit Breaker - 3P+N, C63, 400V

Siemens 5SY8663-7 miniature circuit breaker, 3P+N, C63, 400V.

● In Stock 12-Mo Warranty Same-Day Dispatch Ships Worldwide 🎖 Veteran-Owned

In Stock — Ready to Ship

ManufacturerSiemens

Part number5SY8663-7

Poles 3P+N

Rated Current 63A

Breaking Capacity 25kA

Voltage 400V

Get a price for 5SY8663-7

Response within 1 business hour

🛡

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 plus neutral configuration C-curve tripping characteristic High current rating (63A) 25kA breaking capacity 400V rating Complies with EN 60947-2

Product description

The Siemens 5SY8663-7 is a 3-pole plus neutral miniature circuit breaker designed for 400V AC power systems. It features a C-curve tripping characteristic for handling moderate inrush currents and a high rated current of 63A. This breaker provides a breaking capacity of 25kA, compliant with EN 60947-2 standards, and maintains a standard 70mm width.

This 3P+N circuit breaker is used in industrial and commercial main distribution panels or for circuits requiring protection of all phase conductors and the neutral. Its high current rating and C-curve make it suitable for significant loads and distribution lines.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 5SY8663-7. We are dedicated to providing reliable automation components and exceptional service to meet the demanding needs of industrial clients.

Technical specifications

Poles	3P+N
Rated Current	63A
Breaking Capacity	25kA
Voltage	400V
Curve	C (C63)
Width	70mm
Standard	EN 60947-2

Common applications

Main distribution panels

Industrial power distribution

Commercial power systems

High capacity circuits

Neutral conductor protection

Switchboards

Compatible systems

Main distribution panels Siemens industrial switchboards 400V 3-phase TN systems

Also known as

Siemens 5SY8663-7 MCB Siemens 3P+N C63 Breaker Siemens 63A 400V 3 Phase breaker

Replaces / compatible with

This 3P+N 63A circuit breaker can replace similar units in main distribution applications where a C-curve and 25kA breaking capacity are specified. It ensures simultaneous protection of phase conductors and neutral.

Technical note

Expert tip

For systems requiring neutral disconnection, ensure the Siemens 5SY8663-7 is installed with the neutral pole correctly wired and protected according to local electrical codes.

What happens next?

Email confirmation

Immediate receipt acknowledgment sent to you

Account manager assigned

Confirms your part's spec and condition

Your quote delivered

Tailored to your specific requirements

Frequently asked questions

What is the significance of the '3P+N' designation on the Siemens 5SY8663-7?

The '3P+N' designation on the Siemens 5SY8663-7 indicates that it is a 3-pole circuit breaker with an integrated neutral pole. This means it simultaneously protects the three phase conductors and the neutral conductor from overcurrents, which is crucial in certain industrial and commercial electrical systems.