SPDT Micro Switch Terminal Pinout Guide
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Product Overview
This heavy-duty SPDT Micro Limit Switch features a 50mm long straight hinge lever designed to provide maximum mechanical advantage with minimal actuation force. Operating as a reliable snap-action control switch, its versatile 3-pin layout (COM, NO, NC) makes it a perfect choice for both low-voltage electronics projects and high-voltage appliance repairs.
Bullet Points
- Extended 50mm Lever: The long straight metal arm maximizes mechanical leverage, allowing for highly sensitive trigger detection.
- 3-Pin SPDT Configuration: Built-in Common, Normally Open, and Normally Closed terminals offer flexible circuit design options.
- Snap-Action Precision: Delivers rapid, reliable contact transitions to minimize internal arcing and extend the switch’s operating lifespan.
- Universal Compatibility: Features a standard form factor with dual mounting holes, making it an ideal drop-in replacement for appliances and machinery.
- Heavy-Duty Build: Typically engineered to handle up to 16A at 250VAC, ensuring safe deployment in high-current environments like microwave doors or CNC routers.
Do you need help choosing the correct spade connector size for your wiring, or would you like to see a quick wiring diagram for an Arduino setup?
SPDT Micro Switch Terminal Pinout Guide
High-Performance SPDT Micro Limit Switch with 50mm Long Hinge Lever
SPDT Micro Switch Terminal Pinout Guide
This industrial-grade, single-pole double-throw (SPDT) micro switch is designed for high-reliability automation, safety limiting, and object detection workloads. Featuring a 50mm extended straight-hinge metal lever actuator, it requires minimal operating force to trigger, making it an excellent choice for mechanical sensing in 3D printers, CNC machinery, door interlocks, and automated conveyor setups.
The switch incorporates a robust three-terminal layout (Common, Normally Open, and Normally Closed) that allows you to configure circuits for either normally-on or normally-off behavior depending on your project needs. Built with durable, heat-resistant housing and heavy-duty silver alloy contacts, this component ensures long mechanical life and consistent electrical performance under rigorous cycling conditions.
SPDT Micro Switch Terminal Pinout Guide
Key Features
- Long Lever Actuator: Equipped with a 50mm straight hinge arm to maximize mechanical leverage and reduce the physical actuation force needed to close the internal contacts.
- Versatile SPDT Circuitry: Offers 3-pin versatility supporting both Normally Open (NO) and Normally Closed (NC) electrical paths to easily handle a variety of control logic designs.
- Snap-Action Precision: Delivers rapid contact transition speed that is completely independent of the actual speed of the operating lever, minimizing electrical arcing and expanding contact lifespan.
- Broad Compatibility: Features uniform dimensions and structural mounting holes that serve as standard drop-in replacements for most microwave ovens, home appliances, and custom arcade or robotics enclosures.
Technical Specifications
- Switch Type: Micro Limit Switch / Snap-Action Switch [1]
- Contact Configuration: Single Pole Double Throw (SPDT) [1]
- Actuator Type: 50mm Long Straight Hinge Lever [1]
- Terminal Count: 3 Pins (COM, NO, NC)
- Terminal Style: Quick-connect tab terminals (Spade connectors)
- Electrical Ratings: Typically rated up to 16A at 250VAC (compatible with low-voltage DC applications) [1]
- Mounting Hole Diameter: Standard 3.1mm dual chassis mounting holes
SPDT Micro Switch Terminal Pinout Guide
Common Applications
- Industrial Automation: Serves as physical end-stops and homing position switches for CNC routers, laser cutters, and 3D printer axis frames.
- Appliance Repair: Ideal for replacement door interlock switches in microwave ovens, washing machines, and electronic rice cookers.
- Safety Interlocks: Acts as physical tamper, perimeter safety, or limit detection triggers in heavy machinery housing panels.
- Fluid & Level Control: Integrated into mechanical valve, float, and lever linkages to control pump or gate activation.
Would you like to narrow down the exact amp/voltage rating for your specific model, or do you need assistance selecting the correct wire gauge and spade connector size to hook this up?
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