The Siemens 3SB5203-0UC01 is an Emergency Stop mushroom pushbutton designed for industrial machinery, control panels and automation systems. It features a 22 mm round plastic mounting format, red 40 mm mushroom actuator, maintained operation, turn-to-release mechanism, holder and 1NC contact configuration. Siemens product documentation identifies the same configuration for this part number.
The prominent red mushroom actuator provides an easily recognizable emergency-stop interface for industrial operator panels and machine-control systems.
The 3SB5203-0UC01 uses a 40 mm diameter red mushroom actuator designed for emergency-stop applications. Its large actuator surface allows operators to quickly identify and operate the emergency-stop control when required.
Typical applications include:
The complete emergency-stop circuit should always be designed and installed according to the applicable machine-safety requirements.
The actuator uses a maintained operating mechanism with turn-to-release functionality. Siemens documentation lists the product as a 40 mm mushroom actuator with push-to-trip and turn-to-release operation and 1NC contact.
When the emergency-stop button is pressed, it remains in the actuated position. A deliberate turning action is required to release it.
This type of mechanism helps prevent the actuator from automatically returning to its normal position after activation.
The 3SB5203-0UC01 is equipped with a 1NC (Normally Closed) contact configuration. Current product specifications identify the device as having one NC element and non-illuminated operation.
An NC contact can be incorporated into an emergency-stop control circuit so that operation of the pushbutton changes the state of the control circuit.
The actual safety circuit, contact arrangement and monitoring method should be selected according to the machine's safety design and applicable standards.
The product uses a 22 mm round plastic panel-mounting format, while the mushroom actuator has a 40 mm diameter. This makes it suitable for integration into compact industrial control panels and Siemens 3SB5 operator interfaces.
Typical installation environments include:
The red mushroom actuator provides clear visual differentiation from standard operator pushbuttons.
The large, prominent actuator is particularly useful where an emergency-stop control needs to be quickly identifiable among other switches and control devices.
Its red colour and mushroom shape make it suitable for dedicated emergency-stop interfaces in industrial equipment.
The Siemens 3SB5203-0UC01 can be used for emergency-stop control in:
The 3SB5203-0UC01 is suitable for OEM machine manufacturers, electrical panel builders, automation integrators and industrial maintenance professionals.
Its combination of a 40 mm red mushroom actuator, maintained turn-to-release operation and 1NC contact provides a straightforward emergency-stop interface for industrial control applications.
The above core specifications are consistent with available product documentation and current distributor listings.
The Siemens 3SB5203-0UC01 combines a highly visible 40 mm red mushroom actuator with maintained push-to-trip and turn-to-release operation and a 1NC contact in a compact 22 mm panel-mounting format.
It is a practical choice for OEMs, panel builders and automation integrators requiring a dedicated emergency-stop operator for machinery and industrial control systems.
For related Siemens industrial electrical and automation products, customers can explore the Siemens product range available from SB Smart.
It is a Siemens Emergency Stop mushroom pushbutton with a red 40 mm actuator, maintained operation, turn-to-release mechanism, holder and 1NC contact.
The mushroom actuator has a 40 mm diameter.
The pushbutton uses a 22 mm round panel-mounting format.
The actuator is red.
The device uses a turn-to-release mechanism.
1NC means the device has one Normally Closed contact element.
No. Available technical specifications identify the 3SB5203-0UC01 as non-illuminated.
Yes. The actuator is specified as a maintained emergency-stop device.
It can be used in industrial machinery, automation panels, production lines, conveyors, packaging equipment, OEM machines and machine-control stations.
You can explore the Siemens product range at SB Smart for Siemens emergency-stop pushbuttons, mushroom actuators, contact blocks and other industrial automation products.
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS ACT / 3SB5 |
| Model Number | 3SB5203-0UC01 |
| Product Type | Emergency Stop Push Button |
| Actuator Type | Mushroom |
| Actuator Diameter | 40 mm |
| Mounting Diameter | 22 mm |
| Color | Red |
| Contact Configuration | 1NC |
| Operation Type | Maintained |
| Reset Method | Turn to Release |
| Material | Plastic |
| Brand | Siemens |
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