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Siemens 5SY4104-8 1-Pole Miniature Circuit Breaker β€” 4A

Siemens 1-pole Miniature Circuit Breaker, 4A, D-curve.

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ManufacturerSiemens
Part number5SY4104-8
Voltage 230/400 V
Breaking Capacity 10 kA
Poles 1
Curve Type D
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1-pole protection 10kA breaking capacity D-curve characteristic Handles high inrush currents Compact 70mm depth Siemens quality

The Siemens 5SY4104-8 is a robust 1-pole miniature circuit breaker designed for demanding electrical applications. It offers a substantial 10kA breaking capacity at 230/400V and features a D-curve tripping characteristic, ideal for handling significant inrush currents. This unit is rated at 4A and has a standard 70mm mounting depth.

With its D-curve, this breaker is particularly effective in protecting circuits that power equipment with high starting currents, such as transformers, motors, and welding equipment. It ensures stable operation by allowing for these transient surges while still providing reliable protection against overloads and short circuits. This makes it a staple in industrial machinery and power distribution.

Stanlo Automation, a veteran-owned supplier of surplus industrial automation parts, ensures the availability and quality of the Siemens 5SY4104-8. We are committed to providing reliable components that support your operational continuity and cost-efficiency.

Voltage230/400 V
Breaking Capacity10 kA
Poles1
Curve TypeD
Current Rating4 A
Depth70 mm
ManufacturerSiemens
Motor protection
Transformer protection
Welding equipment
Industrial machinery
High inrush circuits
Power distribution
Motor control circuits Industrial equipment High-power applications
Siemens 5SY41048 Siemens 4A D-curve breaker Siemens industrial circuit breaker
Suitable for replacing older Siemens MCBs or other brands with similar 1-pole, 4A D-curve specifications and dimensions.
Expert tip
When protecting motors with the 5SY4104-8, ensure that the rated current of the breaker is selected appropriately based on the motor's full load amperage and starting characteristics.
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What makes the Siemens 5SY4104-8 suitable for motor protection?
The Siemens 5SY4104-8 is suitable for motor protection due to its D-curve characteristic. This curve is designed to tolerate the high inrush current that motors draw during startup (typically 5 to 10 times the rated current), preventing nuisance tripping while still offering protection against sustained overloads and short circuits.