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Siemens 5SY7363-8 Miniature Circuit Breaker: 3-Pole, 63A, D-Curve

Siemens 5SY7363-8 3-Pole Miniature Circuit Breaker, 63A

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ManufacturerSiemens

Part number5SY7363-8

Voltage 400V

Breaking Capacity 15kA

Poles 3

Curve Type D

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3-pole protection 15kA interrupt rating Type D tripping characteristic 400V operational voltage 63A rated current

Product description

The Siemens 5SY7363-8 is a high-capacity 3-pole miniature circuit breaker designed for robust electrical protection. It operates at 400V with a substantial 15kA breaking capacity, suitable for demanding industrial applications. This breaker features a Type D tripping characteristic, ideal for equipment with high starting currents, and is rated for 63A.

This breaker is well-suited for protecting large three-phase motors, heavy machinery, and main distribution circuits in industrial facilities. Its Type D curve ensures reliable operation in the face of significant inrush currents, preventing unnecessary shutdowns.

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Technical specifications

Voltage	400V
Breaking Capacity	15kA
Poles	3
Curve Type	D
Current Rating	63A
Width	70mm

Common applications

Large motor protection

Three-phase distribution

Heavy industrial machinery

High power circuits

Manufacturing plants

Compatible systems

Standard DIN rail mounting systems

Also known as

Siemens 5SY7363-8 MCB Siemens 63A 3-pole breaker 5SY7 series breaker

Replaces / compatible with

This 3-pole Type D circuit breaker can replace other Siemens 3-pole miniature circuit breakers with similar electrical ratings. Always verify compatibility before installation.

Technical note

Expert tip

For 63A circuits, ensure that the connected wiring and downstream components are also rated appropriately for this current level.

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Frequently asked questions

What are the advantages of using a Type D breaker like the Siemens 5SY7363-8 for heavy industrial loads?

The primary advantage of the Siemens 5SY7363-8 with a Type D curve for heavy industrial loads is its ability to handle high inrush currents. Equipment like large motors or transformers draw much more current when starting up than during normal operation. The Type D curve allows these surges without tripping, protecting the circuit from short circuits while preventing nuisance trips during motor start-up.