10Pcs KW12-3 Micro Roller Lever Limit Switch PCB Mount
10Pcs KW12-3 Micro Roller Lever Limit Switch PCB Mount
10Pcs KW12-3 Micro Roller Lever Arm Limit Switch — PCB Mount
Get reliable, precise circuit switching with this pack of 10 KW12-3 Micro Roller Lever Limit Switches. Designed for PCB mounting, these compact snap-action switches deliver fast, consistent make/break performance across a wide range of electronic and mechanical applications. Whether you're building automation systems, repairing appliances, or prototyping circuits, this value pack has you covered.
Key Specifications
- Model: KW12-3
- Rated Voltage: AC 125V – 250V
- Current Rating: 5A
- Operating Temperature: -40°C to 70°C
- Dimensions: 20 × 10 × 6 mm (L × W × H)
- Terminal Type: PCB (Circuit Board) Terminals
- Actuator: Roller Lever Arm
- Material: Plastic housing
- EU LVD Voltage: Low voltage — below 50V AC or 75V DC
- Country of Origin: Made in China
How It Works
These micro switches use a snap-action mechanism. An external mechanical force (applied via the roller lever) actuates a spring reed. When the force reaches a critical threshold, the reed instantly snaps, causing the moving contact to connect or disconnect from the fixed contact at high speed. When the force is released, the spring reed reverses, resetting the switch instantaneously. This results in:
- Minimal contact gap for precise actuation
- Short stroke action for compact installations
- Low operating force requirements
- Fast-break and fast-make switching action
Wide Application Range
These KW12-3 limit switches are versatile components suited for a broad variety of uses, including:
- Computer mice and peripheral devices
- Automotive electronics and car accessories
- Communications equipment
- Test and measurement instruments
- Gas water heaters and gas burners
- Small home appliances
- Microwave ovens and electric rice cookers
- Floating ball valve equipment
- Building automation systems
- Electric power tools
What's in the Package
- 10 × KW12-3 Micro Roller Lever Limit Switches
Learn more: OSHA on eye and face protection
Frequently Asked Questions
Q: What voltage and current are the KW12-3 micro roller lever limit switches rated for?
A: Each KW12-3 micro switch is rated for AC 125V–250V and a current of up to 5A, making them suitable for a wide range of low-to-mid voltage PCB and circuit applications.
Q: Are these KW12-3 limit switches suitable for DIY electronics and automation projects?
A: Absolutely. The KW12-3 PCB micro switches are popular in DIY electronics, 3D printers, CNC machines, and home automation projects thanks to their compact 20×10×6mm size, reliable snap-action mechanism, and easy PCB terminal mounting.
Q: How many switches are included in this pack?
A: This listing includes 10 KW12-3 micro roller lever limit switches, giving you excellent value for prototyping, repairs, or bulk component stocking.
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.