Core Features Plunger-Actuated Mechanical Position Detection: Functions as a single-pole, double-throw (SPDT) basic limit switch designed for simple, reliable position sensing in light to medium industrial applications. It uses a spring-loaded plunger actuator that triggers electrical contact actuation when pressed—ideal for detecting linear motion, component presence, or end-of-travel limits (e.g., small machine slide positioning, packaging cycle confirmation, or assembly line part alignment). Standard Industrial Electrical Ratings: Rated for AC 230V (50/60Hz) and DC 24V, with a maximum switching current of 5A (resistive load) and 2A (inductive load). The SPDT configuration (1 normally open/NO + 1 normally closed/NC contact) supports versatile control logic—e.g., using the NO contact to signal “position reached” and the NC contact to interrupt a “position lost” circuit—enabling direct integration with PLCs (e.g., Siemens S7-1200), indicator lights, or small relays without auxiliary components. Durable Design for General Industrial Use: Constructed with an impact-resistant thermoplastic (ABS) housing (UL94 V-0 flame-retardant rating) and a zinc-plated steel plunger, ensuring resistance to mechanical wear, dust, and minor moisture exposure. The switch meets IP65 protection (IEC 60529), safeguarding against low-pressure water jets and dust ingress—suitable for non-washdown environments like assembly lines, material handling stations, or small machine control cabinets. Precise Actuation & Consistent Spring Return: The plunger features an 8mm stroke length and a reliable return spring force (4N actuation force), ensuring repeatable triggering (±0.1mm position tolerance) for consistent feedback. The rounded plunger tip minimizes damage to contacted parts (e.g., plastic components or delicate workpieces) and prevents jamming, even in applications with frequent actuation (up to 10 cycles per minute). Simple Installation & Mounting Flexibility: Supports surface mounting via integrated M4 screw holes, compatible with horizontal, vertical, or angled alignment to fit compact spaces (e.g., machine frames, control panel enclosures). The terminal block is clearly labeled (NO/NC/Common) for intuitive wiring, accepting 0.5–1.5mm² wires—reducing installation time for technicians and minimizing wiring errors. Global Compliance for General Applications: Meets essential industrial standards including IEC 60947-5-1 (limit switches), UL 508, and CSA C22.2 No. 14, ensuring compatibility with global electrical systems. It complies with basic machinery safety guidelines (EN ISO 13849-1, Category 1) for non-safety-critical position monitoring, making it a cost-effective choice for standard industrial use cases. Typical Applications The Siemens Switch 3SE3100-1B is engineered for cost-effective, reliable position sensing in light industrial environments, with core use cases including: Small Machine Slide End-Stop Control: Installed at the travel limits of compact CNC linear slides (e.g., 3D printer axes, benchtop milling machines, or small lathes). When the slide reaches its end position, it presses the plunger, activating the NC contact to cut power to the slide motor and the NO contact to trigger an “overtravel” indicator—preventing mechanical damage to the slide, tooling, or workpiece. Packaging Machine Cycle Confirmation: Used in small-scale packaging lines (e.g., carton sealing machines, bottle capping systems, or label applicators) to confirm the completion of a packaging cycle. When a packaged product exits the machine, it depresses the plunger, closing the NO contact to signal the PLC to initiate the next cycle—ensuring consistent production flow and reducing the need for manual oversight. Assembly Line Component Presence Detection: Deployed in electronic component assembly (e.g., PCB insertion, connector crimping, or resistor soldering) to verify that a component is loaded before starting the assembly step. If the component is missing, the plunger remains extended, keeping the NC contact closed to pause the machine—reducing defective parts caused by missing components and improving production quality. Material Handling Pallet Positioning: Integrated into small AGV (Automated Guided Vehicle) stations or warehouse picking systems to detect pallet alignment. When a pallet is placed correctly on the station, it lowers onto the plunger, closing the NO contact to confirm “pallet ready” and allow the AGV to proceed with loading or unloading—streamlining material flow in small warehouses or distribution centers. Benchtop Equipment Safety Interlock: Used in benchtop power tools (e.g., drill presses, sanders, or small saws) as a basic safety interlock. When the tool’s safety guard is closed, it presses the plunger, closing the NC contact to enable tool operation; if the guard is opened mid-use, the plunger extends, opening the NC contact to stop the tool—providing basic operator protection for low-risk benchtop applications