Schmersal US 432Y-M20 – Pneumatically Operated Limit Switch

Overview:

Reliable Mechanical Limit Switching

The Schmersal US 432Y-M20 is part of Schmersal’s U 432 universal range of limit and position switches engineered for industrial automation environments. Built for durability and precision, this model uses a mechanical actuator (plunger or optionally other actuators) to detect motion or position changes and trigger electrical contacts accordingly. 

Designed for use in conveyors, machine tools, safety systems, and control panels, the US 432Y-M20 helps operators and controllers track machine element positions, safely detect end-of-travel points, and implement automation feedback loops with high reliability. 

Key Features & Specifications

• Model: Schmersal US 432Y-M20 limit switch (Part No: 101176036) 

• Manufacturer: Schmersal — specialist in industrial switching and safety solutions 

• Main Components: Metal housing, actuating plunger (basic configuration) 

• Contacts: 2 mechanical contacts (adjustable switching points and contact function) 

• Housing Material: Rugged metal enclosure for industrial durability 

• Dimensions (Basic Component): ~62 mm (W) × 80 mm (H) × 50 mm (D) 

• Cable Entries: 3 × M20 × 1.5 threaded entries for secure cabling 

• Connection: Screw terminals (M20 × 1.5) 

• Mechanical Life: ≥10,000,000 operations minimum for reliable long-term service 

• Switching Principle: Slow-action mechanical contact triggering 

• Contact Materials: Silver contacts for reliable conductivity 

• Protection Rating: IP65 protection against dust and low-pressure water jets (industrial protection) 

• Rated Insulation Voltage: 500 V (IEC/EN standards) 

• Thermal Test Current: 16 A (tested current capacity) 

• Actuating Speed Range: ~1 mm/min to ~1 m/s 

• Operating Temp: Typically −20 °C to +60 °C (industrial ambient range) 

This switch is factory-configurable with various actuator heads and contact arrangements, allowing tailored solutions for different industrial machine configurations. 

Industrial Applications

The Schmersal US 432Y-M20 Limit Switch is suitable for a broad range of automation and safety applications including:

• Conveyor end-of-travel detection

• Position monitoring on industrial machinery

• Safety interlocks and control feedback loops

• Packaging and material handling systems

• Robotics and handling automation

• Process control panels and machine safety systems

Its robust metal enclosure and adjustable switching points make it ideal for environments where vibration, dust, or mechanical wear are present, ensuring longer life and consistent detection performance. 

FAQ

What is a limit switch?

A limit switch is an electromechanical device that detects the presence or position of a moving part and opens or closes electrical contacts accordingly to initiate a control action. 

What does “adjustable switching points” mean?

It means the positions at which the switch changes state (opens/closes contacts) can be tailored by adjusting the actuator travel or contact settings to match specific application needs. 

Is this switch suitable for industrial environments?

Yes — with a metal enclosure and IP65 protection, the US 432Y-M20 is designed for harsh industrial conditions including dust and occasional water exposure. 

Can the contacts configuration be changed?

Yes—contact function and switching point settings are adjustable, and different actuator types can be fitted to meet diverse mechanical conditions. 

Call to Action

Ensure reliable position detection and automation control with the Schmersal US 432Y-M20 Limit Switch — contact Seven Star LLC for pricing, availability, and application support.