The Siemens 3SE52120CC058K is a SIRIUS 3SE5 mechanical position switch designed for reliable machine position detection, limit monitoring, and industrial control applications. It features a 31 mm plastic enclosure according to EN 50047, 1 × M20 × 1.5 device connection, and 1 NO + 1 NC quick-action contacts with a replaceable contact arrangement. The actuator is a rounded plunger, providing direct mechanical actuation when contacted by a moving machine component.
This position switch is suitable for applications where the position, movement, or end travel of a mechanical component needs to be detected and converted into an electrical signal. Its compact enclosure and standardized construction make it suitable for integration into machinery, production equipment, conveyors, packaging systems, and industrial automation applications.
The Siemens 3SE52120CC058K position switch is used for detecting the position or movement of machine components.
When a moving component operates the rounded plunger, the internal quick-action contacts change their electrical state. This signal can then be used by an appropriate PLC, control system, monitoring circuit, or machine interlocking arrangement.
Typical applications include:
The Siemens 3SE5 product family provides different actuator and contact configurations, allowing position switches to be selected according to the mechanical arrangement and electrical requirements of the machine.
The 3SE52120CC058K uses one normally open (NO) and one normally closed (NC) contact.
This combination provides flexibility when the switch is connected to a machine control or monitoring circuit.
The contacts can be used for:
The quick-action contact mechanism provides a defined switching response when the actuator is operated.
The contacts are also replaceable, which can be advantageous during maintenance and servicing where the switching-contact assembly requires replacement.
The rounded plunger provides direct mechanical actuation.
When a moving machine component reaches the required position, it presses against the plunger. The mechanical movement operates the internal switching mechanism and changes the state of the NO and NC contacts.
This configuration is useful where the machine component approaches the switch directly and a compact actuator is preferred.
Typical uses include:
Correct alignment between the moving machine component and plunger is important for reliable operation and to prevent unnecessary mechanical stress.
The 3SE52120CC058K uses a 31 mm plastic enclosure designed according to EN 50047.
The standardized enclosure format makes the switch suitable for industrial machinery requiring a compact mechanical position-detection device.
The plastic enclosure can be beneficial where a lightweight and compact position-switch design is preferred.
The SIRIUS 3SE5 range includes different enclosure, actuator, and contact configurations, allowing machine builders to select an appropriate switch for their application.
The position switch features 1 × M20 × 1.5 device connection.
This provides a standardized connection arrangement for industrial wiring and cable entry.
During installation, appropriate cable glands and connection accessories should be selected according to the required environmental conditions and the complete machine installation.
Proper installation is also important for maintaining the intended enclosure protection.
The 3SE52120CC058K uses quick-action contacts.
Quick-action switching provides a defined change in contact state as the actuator moves through its switching position. This makes the configuration suitable for repetitive mechanical position detection and limit-switch applications.
The switching mechanism should always be operated within the manufacturer's specified mechanical and electrical limits.
One of the useful features of this version is its replaceable contact arrangement.
For industrial machinery that performs frequent switching operations, replaceable contacts can simplify certain maintenance requirements.
Instead of replacing the entire position-switch assembly for every contact-related service requirement, the appropriate replaceable switching component can be considered where compatible and permitted.
For replacement work, always verify the exact Siemens order number and compatible replacement component before servicing.
The Siemens 3SE52120CC058K position switch can be used in:
For OEM machine manufacturers, the 3SE52120CC058K offers a compact and standardized position-detection solution.
The combination of a 31 mm plastic enclosure, rounded plunger, and 1 NO + 1 NC quick-action contacts allows the switch to be integrated into a wide range of machine-control arrangements.
Its replaceable contacts can also provide an advantage for maintenance-oriented machine designs.
The standardized EN 50047 format can make it easier to incorporate the switch into compatible machine layouts.
The switch provides a conventional mechanical contact interface that can be integrated into suitable control and monitoring circuits.
The M20 × 1.5 device connection supports common industrial cable-entry arrangements, while the replaceable contact configuration can be useful for servicing.
For replacement applications, check:
This helps ensure the replacement switch matches the original machine configuration.
Position switches can be incorporated into machine safety systems when correctly selected and installed. However, the 3SE52120CC058K should not be considered a complete machine safety system by itself.
The overall safety function depends on the complete machine safety architecture, including:
The complete safety function should be appropriately designed, verified, and validated before commissioning.
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The 3SE52120CC058K is a Siemens SIRIUS 3SE5 mechanical position switch with a 31 mm plastic enclosure, M20 × 1.5 device connection, 1 NO + 1 NC quick-action contacts, replaceable contacts, and a rounded plunger.
It has a rounded plunger designed for direct mechanical actuation.
It provides 1 NO + 1 NC quick-action contacts.
Yes, this version features replaceable quick-action contacts.
The switch has 1 × M20 × 1.5 device connection.
The enclosure width is 31 mm and the design is according to EN 50047.
It can be used for machine position monitoring, mechanical limit detection, conveyors, packaging machinery, machine tools, production equipment, and industrial automation applications.
A rounded plunger provides a straightforward mechanical actuation method for machine components that directly approach and operate the switch.
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3SE5 |
| Model Number | 3SE5212-0CC05-8K |
| Variant | CC058K |
| Product Type | Rope Pull Safety Switch |
| Contact Configuration | 2NC |
| Switching Function | Snap-Action |
| Positive Opening | Yes |
| Housing Material | Die-Cast Metal |
| Connection Type | Screw Terminals |
| Cable Entry | M20 × 1.5 |
| Rated Insulation Voltage | 400 V |
| Rated Thermal Current | 10 A |
| AC-15 Rating (230V) | 3 A |
| DC-13 Rating (24V) | 3 A |
| Protection Rating | IP66 / IP67 |
| Mechanical Life | Up to 15 Million Operations |
| Operating Temperature | -25°C to +85°C |
| Storage Temperature | -40°C to +90°C |
| Shock Resistance | 30 g / 11 ms |
| Vibration Resistance | 0.35 mm / 5 g |
| Housing Width | Approx. 56 mm |
| Housing Length | Approx. 119 mm |
| Weight | Approx. 0.55 kg |
| Reset Type | Manual Reset |
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