5SY4450-7??

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The Siemens 5SY4450-7 is a factory-grade miniature circuit breaker designed for reliable electrical protection in industrial and commercial environments. Part of the Siemens 5SY4 series, this 4-pole MCB offers a rated current of 50A at 230/400V AC and a high short-circuit breaking capacity of 10kA. Equipped with a thermal magnetic trip unit and C-characteristic tripping curve, it ensures prompt and accurate protection against overcurrent and short circuits. The device is suitable for DIN rail mounting, making installation straightforward and compatible with standard electrical panels. This circuit breaker withstands operation in temperatures ranging from -40 to 70°C, making it versatile for diverse applications. For those seeking durable and tested circuit protection, the Siemens 5SY4450-7 delivers consistent performance and safety compliance for factory control and process systems.

Key Features of Siemens 5SY4450-7

  • Rated current: 50A suitable for medium-load circuits
  • 4-pole configuration for three-phase systems plus neutral
  • C characteristic trip curve ideal for general industrial use
  • Short-circuit breaking capacity of 10kA at 400V AC
  • Thermal magnetic trip unit for precise overload and short-circuit protection
  • Mounting style: Surface mount or DIN rail compatible
  • IP20 rated housing for basic protection against touch and contaminants
  • Wire connection capacity from 1 to 25 mm²
  • Operating temperature range from -40°C to +70°C

Explore Siemens 5SY4450-7 specifications covering voltage, I/O, and communication

Specification Details
Rated Voltage 230/400 V AC
Number of Poles 4
Rated Current (In) 50 A
Short-Circuit Breaking Capacity 10 kA at 400 V AC
Trip Curve C
Mounting DIN Rail / Surface Mount
Operating Temperature -40°C to +70°C
Cross Section of Connecting Wire 1…25 mm²
IP Rating IP20
Dimensions (Depth) 70 mm

Applications / Use Case

This Siemens 5SY4450-7 is commonly used in industrial automation, process control, and factory control panels worldwide. It offers secure circuit protection for production line systems, packaging and conveyor operations, and machine automation setups. Its robust thermal magnetic trip ensures sensitive and reliable protection against faults, making it ideal for safeguarding electrical circuits in harsh industrial environments. The compact design and flexible mounting options further enhance its usability across a wide range of control cabinets and electrical installations.

Price & Availability

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5SY4450-7??

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Does it come with a warranty?

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