| Basic Snap-Action Micro Switch | A preloaded spring mechanism rapidly changes the contact state after the actuator reaches its operating point. The snap action helps reduce slow or uncertain switching. | Pin plunger or short lever | SPDT SPST-NO SPST-NC | Typically 1–15 A at low-voltage AC/DC; lower ratings are common in compact signal versions. | Approximately 0.5–4 N | Operating travel commonly 0.3–2 mm; overtravel may be several millimeters depending on design. | Often IP40–IP67, depending on sealing and housing construction. | Control panels, appliances, machinery interlocks, position detection and safety-related limit sensing. | Confirm contact material, load type, electrical life, terminal layout and required overtravel. |
| Roller Lever Micro Switch | A rotating roller at the end of a lever transfers linear or cam motion to the internal snap-action mechanism. | Hinged lever with roller | SPDT SPST-NO SPST-NC | Typically 3–15 A at common industrial AC ratings; signal versions may be rated below 1 A. | Approximately 0.3–3 N | Pretravel is commonly 1–5 mm at the actuator; adjustable or long-travel versions are also available. | Typically IP40–IP67; sealed roller designs are preferred in dusty or damp areas. | Conveyor position sensing, door detection, vending equipment, machine guards and cam-operated controls. | Check roller diameter, lever length, approach direction, side loading and actuator wear resistance. |
| Simulated Roller or Leaf Lever Switch | A flexible metal leaf or simulated roller lever accommodates gradual or angled contact with a moving part while operating the snap mechanism. | Leaf lever or flexible lever | SPDT SPST-NO | Commonly 1–10 A, with lower-current versions used for electronic signal detection. | Approximately 0.2–2 N | Typically 1–6 mm of actuator movement, depending on lever geometry. | Usually IP40–IP67 when fitted with a sealed body or protective cover. | Small mechanisms, printers, compact appliances, access panels and low-force position detection. | Evaluate lever fatigue life, actuation angle, return force and clearance around the moving part. |
| Sealed Waterproof Micro Switch | The internal snap-action mechanism is enclosed with gaskets, resin sealing or a sealed actuator to resist water, dust and contaminants. | Plunger, lever or roller actuator | SPDT SPST-NO SPST-NC | Typically 1–15 A for power switching; exact rating depends on voltage, load and sealing design. | Approximately 0.5–5 N | Commonly 0.5–3 mm operating travel, with additional overtravel for position tolerance. | Commonly IP65–IP68; IP rating must be verified for the complete installed assembly. | Outdoor equipment, automotive auxiliary controls, washing equipment, pumps and industrial machinery. | Check IP test conditions, cable or terminal sealing, temperature range, corrosion resistance and chemical compatibility. |
| High-Temperature Micro Switch | Uses heat-resistant materials, insulation and lubricants so that the snap-action contacts remain functional at elevated temperatures. | Plunger, lever or roller actuator | SPDT SPST-NO SPST-NC | Often 1–15 A, but the allowable current may be derated at higher temperatures. | Approximately 0.5–5 N | Typically 0.3–2 mm operating travel. | Often IP40–IP67; thermal protection and sealing are separate specifications. | Ovens, heating systems, industrial furnaces, engine compartments and high-temperature process equipment. | Review maximum ambient temperature, terminal temperature, insulation rating, derating curves and service life. |
| Low-Force Micro Switch | A reduced-force spring and optimized actuator allow a small moving part to change the contacts with minimal mechanical load. | Short plunger, lightweight lever or low-force roller | SPDT SPST-NO | Commonly 0.1–5 A; many low-force designs are intended for signal or light-load circuits. | Approximately 0.05–1 N | Typically 0.2–1.5 mm operating travel. | Usually IP40–IP67, depending on whether the switch is sealed. | Human-interface mechanisms, compact consumer equipment, small actuators and precision position detection. | Balance low operating force against contact reliability, vibration resistance and mechanical life. |
| Heavy-Duty Limit Micro Switch | A reinforced actuator and housing operate a snap-action contact system designed for frequent mechanical operation and harsher environments. | Long lever, roller lever or adjustable actuator | SPDT SPST-NO SPST-NC | Typically 5–20 A at specified AC ratings; DC and motor loads require separate verification. | Approximately 1–8 N | Commonly 1–5 mm operating travel, with substantial overtravel on some models. | Typically IP54–IP67; higher protection requires suitable cable entry and mounting. | Material handling systems, industrial doors, machine tools, lifts and automated production equipment. | Confirm mechanical endurance, actuator impact resistance, vibration performance, mounting strength and load category. |
| Subminiature Micro Switch | A compact snap-action mechanism provides discrete position feedback where installation space is limited. | Miniature plunger or short lever | SPDT SPST-NO SPST-NC | Commonly 0.1–5 A, with many designs optimized for low-voltage signal circuits. | Approximately 0.1–2 N | Typically 0.2–1.5 mm operating travel. | Usually IP40–IP67, depending on the body and actuator seal. | Compact appliances, battery-powered devices, office equipment, robotics and small control assemblies. | Check body dimensions, terminal pitch, soldering method, PCB clearance, vibration and contact resistance. |
| PCB-Mount Micro Switch | Directly mounts to a printed circuit board and electrically connects through PCB terminals while retaining snap-action switching. | Plunger, lever or low-profile actuator | SPDT SPST-NO SPST-NC | Typically 0.1–5 A; PCB trace width and terminal temperature can limit the usable current. | Approximately 0.1–3 N | Commonly 0.2–2 mm operating travel. | Often IP40–IP67; board-level protection depends on the enclosure. | Electronic controls, appliance control boards, battery systems, instrumentation and compact automation modules. | Verify footprint, terminal orientation, solder profile, creepage distance and compatibility with automated assembly. |
| Double-Circuit or Multi-Pole Micro Switch | One actuator simultaneously controls two electrically separated circuits, helping coordinate control and indication functions. | Plunger, lever or roller actuator | DPDT 2 × SPDT | Commonly 1–10 A per circuit, subject to independent voltage, load and isolation limits. | Approximately 1–6 N | Typically 0.5–3 mm operating travel. | Usually IP40–IP67, depending on the enclosure and actuator seal. | Safety interlocks, redundant status feedback, mode selection and equipment control circuits. | Check pole-to-pole isolation, simultaneous switching, terminal spacing, creepage and required circuit independence. |
| Normally Open or Normally Closed Dedicated Switch | The switch is configured for a single default contact state and changes state when the actuator is pressed or released. | Plunger, lever or roller actuator | SPST-NO SPST-NC | Typically 0.1–15 A, depending on the contact system and intended load. | Approximately 0.1–5 N | Typically 0.2–3 mm operating travel. | Commonly IP40–IP67. | Door-open detection, alarm circuits, appliance controls, simple presence sensing and status indication. | Choose NO or NC according to the fail-safe requirement; verify whether the circuit must remain closed during power loss. |