The Siemens 3SE51220CH80 is a SIRIUS 3SE5 mechanical position switch designed for reliable position detection, travel monitoring, and limit-switch applications in industrial machinery. It features a 56 mm wide metal enclosure, 3 × M20 × 1.5 device connections, and 1 NO + 1 NC quick-action contacts. The switch uses a rotary actuator that can be adjusted for right- or left-hand operation, combined with a 200 mm long aluminum rod lever.
This configuration is particularly suitable for machinery where the moving component does not directly reach a compact plunger or roller actuator. The extended aluminum rod provides a larger mechanical actuation area, while the adjustable rotary actuator allows the switch to be configured according to the machine's movement direction and installation requirements.
The Siemens 3SE51220CH80 position switch is used to monitor the position or movement of machine components.
When the moving component comes into contact with the 200 mm aluminum rod lever, the rod moves the rotary actuator and changes the state of the internal electrical contacts. The resulting signal can be used for machine control, position indication, limit monitoring, sequencing, or other appropriate control functions.
Typical applications include:
The 3SE51220CH80 provides 1 normally open (NO) and 1 normally closed (NC) quick-action contacts.
This arrangement provides flexibility for machine-control and monitoring circuits.
The contacts can be used for:
The quick-action contact mechanism provides a defined switching response as the rotary actuator is operated by the rod lever.
The electrical contacts should always be used within their specified ratings and according to the requirements of the complete control circuit.
A key feature of the 3SE51220CH80 is its 200 mm long aluminum rod lever.
The extended rod provides a larger mechanical actuation area compared with compact plunger-type position switches. This makes the configuration suitable for machinery where the moving component needs to interact with a longer actuator.
The rod lever can be useful for detecting movement across a larger mechanical area or where the machine's available actuation point is positioned away from the switch body.
Potential applications include:
Correct mechanical positioning is important to prevent excessive force or unintended impact on the rod.
The switch incorporates a rotary actuator adjustable for right- or left-hand operation.
This provides flexibility when installing the position switch on different sides of a machine or where the direction of mechanical movement varies.
The adjustable actuator can be configured to accommodate the machine's mechanical arrangement and intended direction of actuation.
This can be particularly useful in:
The actuator should be adjusted and installed according to the manufacturer's specified operating range.
The 3SE51220CH80 features a 56 mm wide metal enclosure.
The metal construction provides a robust housing suitable for industrial machinery and applications requiring a durable mechanical position switch.
The wider enclosure accommodates the actuator and connection arrangement associated with this particular configuration.
This makes the switch suitable for machinery where a larger position-switch body and extended rod actuator are appropriate.
The position switch has 3 × M20 × 1.5 device connections.
Multiple connection points provide installation flexibility for the associated machine wiring.
Suitable cable glands and connection accessories should be selected according to the machine's wiring arrangement and environmental requirements.
Proper installation is important to maintain reliable electrical connections and the required enclosure protection.
The 3SE51220CH80 uses quick-action contacts.
Quick-action switching provides a defined electrical transition when the rotary actuator reaches the relevant switching position.
This makes the switch suitable for repetitive position-monitoring applications where the machine-control system requires a clear electrical signal from mechanical movement.
The switch should be operated within the specified mechanical travel and electrical switching limits.
The Siemens 3SE51220CH80 position switch can be used in:
For OEM machine builders, the 3SE51220CH80 provides a practical solution for applications where a conventional short actuator is not suitable.
The combination of a 200 mm aluminum rod lever and right/left adjustable rotary actuator provides considerable flexibility for machine layouts.
The 1 NO + 1 NC quick-action contact arrangement can also support both control and monitoring functions within an appropriate machine-control circuit.
For maintenance teams, the extended rod actuator can be useful when replacing a position switch in machinery that already has a long mechanical actuation arrangement.
Before selecting this product as a replacement, compare:
This helps ensure the replacement product matches the existing machine configuration.
A mechanical position switch may form part of a machine safety system when appropriately selected and integrated. However, the 3SE51220CH80 is not a complete machine safety system by itself.
The complete safety function may involve safety switches, safety relays or controllers, contactors, feedback circuits, machine controls, protective devices, wiring, and other safety components.
A suitable risk assessment and complete safety-system design should be performed before commissioning a machine.
Looking to buy Siemens 3SE51220CH80 position switch in India? SB Smart supplies Siemens SIRIUS position switches, safety switches, safety relays, contactors, pushbuttons, and industrial automation components for OEMs, panel builders, system integrators, contractors, and industrial customers.
For requirements such as Siemens 3SE51220CH80 supplier in India, Siemens 56 mm metal position switch dealer in Delhi NCR, Siemens 200 mm rod lever position switch supplier Gurgaon, or Siemens SIRIUS position switch supplier Faridabad, customers can enquire with SB Smart for availability and quotation.
SB Smart offers a broad range of Siemens industrial automation and electrical control products for OEM machinery, control panels, industrial projects, maintenance, and replacement requirements.
The range includes Siemens SIRIUS position switches, safety switches, safety relays, contactors, emergency-stop devices, pushbuttons, selector switches, and other industrial control components.
For bulk requirements and industrial projects, customers can enquire about product availability and quotation assistance.
The 3SE51220CH80 is a Siemens SIRIUS 3SE5 mechanical position switch with a 56 mm wide metal enclosure, 3 × M20 × 1.5 connections, 1 NO + 1 NC quick-action contacts, and a 200 mm aluminum rod lever.
It uses a rotary actuator with a 200 mm long aluminum rod lever.
Yes. The rotary actuator is adjustable for right- or left-hand operation.
It provides 1 NO + 1 NC quick-action contacts.
The aluminum rod lever is 200 mm long.
The metal enclosure is 56 mm wide.
The switch has 3 × M20 × 1.5 device connections.
It can be used for machine position monitoring, conveyor systems, travel-end detection, material handling, packaging machinery, production equipment, and industrial automation applications.
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3SE5 |
| Model Number | 3SE5122-0CH80 |
| Variant | CH80 |
| Product Type | Safety Position Switch |
| Contact Configuration | 1NO + 1NC |
| Switching Function | Snap-Action |
| Positive Opening | Yes |
| Actuator Type | Adjustable Roller Lever |
| Housing Material | Die-Cast Metal |
| Connection Type | Screw Terminals |
| Cable Entry | M20 × 1.5 |
| Rated Insulation Voltage | 400 V |
| Rated Thermal Current | 10 A |
| Protection Rating | IP66 / IP67 |
| Mechanical Life | Up to 15 Million Operations |
| Electrical Life | Up to 100,000 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 |
| Mounting Standard | EN 50041 |
| Weight | Approx. 0.40 kg |
No reviews yet.