Core Features Plunger-Actuated Light-Duty Sensing: Functions as a single-pole, double-throw (SPDT) basic limit switch engineered for simple position detection in low-power industrial and commercial control circuits. It uses a spring-loaded, non-roller plunger with a compact design—optimized to trigger contact actuation when pressed by lightweight moving parts (e.g., small machine slides, mini-conveyor guides, or enclosure doors). This makes it ideal for low-cycle tasks like end-of-travel confirmation for compact equipment, presence detection for small workpieces, or basic door status monitoring. Low-Voltage, Low-Current Compatibility: Rated for AC 230V (50/60Hz) and DC 24V (the most common industrial control voltages), with a maximum switching current of 2A (resistive load) and 0.5A (inductive load). This narrow current range targets low-power circuits such as: Sensor signal lines (e.g., proximity sensors, photoelectric sensors). PLC input/output (I/O) circuits. Auxiliary systems (e.g., indicator lights, small signal relays). Durable Compact Construction: Housed in an impact-resistant thermoplastic enclosure (UL94 V-0) that insulates live components and resists dust, light moisture, and minor mechanical impacts. The plunger is made of zinc-plated steel for corrosion resistance, while the toggle mechanism provides a tactile “click” feedback—ensuring operators can confirm when the switch toggles between “On” and “Off” states. It meets IP20 protection (IEC 60529), optimized for installation inside control cabinets (where exposure to water or heavy dust is minimal). Reliable Actuation & Reset: The plunger features a 3mm short stroke length and a gentle return spring force (2.0N), ensuring precise triggering without damaging delicate contacted parts (e.g., thin plastic components, electronic sensors, or small metal workpieces). The spring mechanism guarantees consistent reset after actuation, minimizing false signals and extending the switch’s service life (≥300,000 mechanical operations). Simplified Installation & Wiring: Supports surface mounting via two small M3 screw holes, with a low-profile design (dimensions ~45mm × 28mm × 22mm) that saves space in dense control cabinet setups. The terminal block uses screw connections for 0.14–1.0mm² wires (solid or stranded), with clear labeling (NO/NC/Common) to reduce wiring errors—ideal for quick, hassle-free installation by technicians. Global Basic Safety Compliance: Meets essential industrial standards including IEC 60947-5-1 (low-voltage switches for control circuits) and UL 508 (industrial control equipment). It complies with basic machinery safety guidelines (EN ISO 13849-1, Category 1) for non-critical position monitoring, making it a cost-effective choice for applications where high safety redundancy is not required. Typical Applications The Siemens Switch 3SE1 200-1 is engineered for light-duty position sensing in low-power industrial control circuits, with core use cases including: Miniature Machine End-Stop Control: Installed at the travel limits of small-scale machinery (e.g., desktop 3D printer build plates, jewelry-making lathes, or electronic component assemblers). When the machine’s slide presses the plunger, the NC contact interrupts the control circuit, stopping movement and preventing overtravel damage to delicate parts. Sensor Signal Interruption: Used to manually isolate sensor signal lines (e.g., 24V DC proximity sensors) in industrial automation setups. The switch acts as a “test mode” trigger—disconnecting the sensor from the PLC to troubleshoot whether faults stem from the sensor or the controller. Auxiliary Indicator Light Control: Deployed to switch power to low-voltage indicator lights (e.g., “Machine Ready,” “Fault” LEDs) in control panels. Its 2A current rating supports multiple lights per switch, reducing the number of components needed for status monitoring. Enclosure Door Status Monitoring: Mounted on the access doors of small control cabinets or auxiliary equipment (e.g., power supplies, relay modules) to detect open/closed status. If the door is opened, the plunger resets, opening the NC contact to trigger a low-power alert (e.g., a buzzer or HMI notification). Bench Test Setup Wiring: Ideal for temporary or permanent bench test stations (e.g., electronic component testing, sensor calibration). The switch integrates into low-voltage test circuits to start/stop signal flow, simplifying setup changes and ensuring safe testing conditions.