Core Features Plunger-Actuated Light-Duty Sensing: Functions as a single-pole, double-throw (SPDT) basic limit switch designed for simple position detection in light-duty industrial and commercial applications. 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, conveyor guides, or enclosure doors). This makes it ideal for low-cycle tasks like end-of-travel confirmation for miniaturized equipment, presence detection for small components, or basic door status monitoring. Standard Control Voltage Compatibility: Rated for AC 230V (50/60Hz) and DC 24V (common industrial control voltages), with a maximum switching current of 3A (resistive load) and 1A (inductive load). The SPDT configuration (1 normally open/NO + 1 normally closed/NC contact) supports flexible control logic—for example, using the NO contact to signal “position reached” to a PLC, or the NC contact to interrupt a low-power control circuit. It integrates seamlessly with small-scale controllers (e.g., Siemens LOGO! PLCs) without requiring additional power conditioning. Compact & Durable Construction: Housed in a high-impact thermoplastic enclosure (UL94 V-0 flame-retardant rating) with a zinc-plated steel plunger. The enclosure’s streamlined design (45mm × 30mm × 25mm) saves space in tight installations (e.g., small control cabinets, mini-machines), while the sealed internal structure protects contacts from dust and light moisture. It meets IP65 protection (IEC 60529) to withstand low-pressure water jets and dust ingress—suitable for workshops, packaging lines, or commercial equipment. Reliable Actuation & Reset: The plunger features a 5mm short stroke length and a gentle return spring force (2.8N actuation force), ensuring precise triggering without damaging delicate contacted parts (e.g., plastic components, thin metal sheets). The spring mechanism guarantees consistent reset after actuation, minimizing false signals and extending the switch’s service life (≥500,000 mechanical operations). Easy Installation & Wiring: Supports surface mounting via two small M3 screw holes, with a low-profile design that fits in confined spaces (e.g., between machine components or inside compact enclosures). The terminal block is clearly labeled (NO/NC/Common) for intuitive wiring, accepting 0.2–1.0mm² thin-gauge wires—ideal for lightweight control circuits and reducing installation time for small-scale projects. Global Basic Safety Compliance: Meets essential industrial standards including IEC 60947-5-1 and UL 508, ensuring compatibility with global light-duty control systems. 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 002-3 is engineered for light-duty position sensing in small-scale industrial and commercial setups, with core use cases including: Mini-Machine End-Stop Control: Installed at the travel limits of small-scale machinery (e.g., desktop 3D printers, mini CNC mills, or jewelry-making equipment) to prevent overtravel. When the machine’s slide reaches the plunger, the NC contact interrupts the control circuit, stopping movement and protecting delicate components. Small Conveyor Component Detection: Deployed on lightweight conveyors (e.g., those handling electronic components, jewelry parts, or pharmaceutical vials) to detect the presence of small products. The NO contact triggers a signal to a controller, enabling actions like conveyor speed adjustment or product sorting. Enclosure & Cabinet Door Monitoring: Mounted on the access doors of small control cabinets, server racks, or commercial equipment (e.g., coffee machines, vending machines) to monitor door status. If the door is opened, the plunger resets, opening the NC contact to trigger an alert (e.g., LED indicator or low-power alarm). Packaging Line Small-Part Sensing: Used in compact packaging lines (e.g., blister packaging for pills, small toy packaging) to confirm that small components are in place before sealing. If a part is missing, the plunger fails to actuate, and the NC contact pauses the line to prevent defective packaging. Office & Commercial Equipment Control: Integrated into commercial equipment (e.g., document shredders, laminators, or 3D scanners) to monitor moving parts (e.g., shredder blades, scanner lids). The switch ensures the equipment stops if a part moves beyond its safe range, reducing risk of damage or injury.