10 Pcs Mini Micro Limit Switch Roller Lever SPDT Snap Action

ELEABC KW12-3 Mini Micro Limit Switch – 10-Piece Set

Get reliable, snap-action switching in a compact form factor with this 10-pack of ELEABC KW12-3 Mini Micro Limit Switches. Featuring a roller lever arm and SPDT (Single Pole Double Throw) configuration, these switches deliver fast, precise actuation for a wide range of DIY electronics, automation, and repair projects.

Key Specifications

• Model: KW12-3 Micro Roller Lever Arm Limit Switch
• Color: Black
• Dimensions: 20 × 10 × 6 mm (L × W × H)
• Rated Voltage: AC 125V – 250V
• Current Rating: 5A
• EU LVD Voltage: Low voltage – Below 50V AC or 75V DC
• Material: Plastic housing
• Terminals: PCB / Circuit Board compatible
• Certification: CCC certified
• Warranty: 2 Years
• Made in Mainland China

How It Works

These snap-action switches operate via an external mechanical force applied through a roller lever. When force reaches a critical threshold, the internal reed springs into action — making or breaking the circuit almost instantaneously. When the force is released, the reed reverses direction just as quickly. The result is a fast, clean switch operation with minimal travel distance and low actuation force required.

Features

• Compact snap-action SPDT design for quick, reliable switching
• Small contact spacing and short stroke action for precision control
• Roller lever arm allows smooth, consistent actuation
• Normally Open (NO) and Normally Closed (NC) terminals included
• Suitable for PCB / circuit board mounting
• Pack of 10 — great value for prototyping and repairs

Wide Range of Applications

These versatile micro limit switches are used in a broad array of applications, including:

• Computer mouse and peripheral devices
• Automotive electronics
• Communications equipment
• Test instruments
• Gas water heaters and gas burners
• Small home appliances, microwave ovens, and electric rice cookers
• Floating ball support equipment
• Medical equipment
• Building automation systems
• Power tools and electric tools

What's in the Box

• 10 × KW12-3 Micro Roller Lever Arm Normally Open/Close Limit Switch

Learn more: OSHA on personal protective equipment

Frequently Asked Questions

Q: What does SPDT mean on these micro limit switches?

A: SPDT stands for Single Pole Double Throw. This means each KW12-3 micro limit switch has one common terminal plus two output terminals — one for Normally Open (NO) and one for Normally Closed (NC) connections — giving you flexibility in how you wire them into your circuit.

Q: Are these micro limit switches compatible with PCB mounting?

A: Yes! The KW12-3 mini micro limit switches feature PCB terminals, making them easy to solder directly onto a circuit board. Their compact 20 × 10 × 6 mm footprint makes them ideal for space-constrained electronics projects.

Q: What voltage and current can these snap action switches handle?

A: Each switch is rated for AC 125V–250V and up to 5A current. They also comply with EU LVD low-voltage directives (below 50V AC or 75V DC), making them suitable for a wide range of household and industrial electronics applications.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.