KW11-3Z Micro Limit Switch 3-Pin NO/NC 5A 125/250VAC | 10/20 Pack

KW11-3Z-1 / 20PCS

$11.28

$11.28 $14.63

KW11-3Z Micro Limit Switch 3-Pin NO/NC 5A 125/250VAC | 10/20 Pack

Q: What is the difference between the NO and NC contacts on the KW11-3Z micro switch?

The Normally Open (NO) contact is open (no current flows) when the switch is at rest and closes when the actuator is pressed. The Normally Closed (NC) contact is the opposite — it is closed at rest and opens when the actuator is triggered. The Common (COM) pin is shared between both. This 3-pin design lets you choose the contact behavior that best suits your circuit.

Q: What is the maximum load these micro switches can handle?

These switches are rated for 5A at 125V AC or 250V AC. They are designed for moderate-load switching tasks. For high-current or high-voltage applications beyond these ratings, a relay or solid-state relay should be used in conjunction with the switch.

Q: Do these come with both handle and handleless versions?

Yes — you can select either the lever/handle style (which includes an actuating arm for easy mechanical triggering) or the handleless/button contact style (a bare plunger design for tight spaces or direct contact triggering). Check the available variant options when adding to your cart.

$11.28

$11.28 $14.63

Shipping calculated at checkout.

Color KW11-3Z-1 KW11-3Z-E KW11-3Z-A KW11-3Z-B

Size 20PCS 10PCS

Reliable Micro Limit Switches for Precise Control Applications

Whether you're building DIY electronics, automating machinery, or repairing appliances, these KW11-3Z Micro Limit Switches deliver dependable performance in a compact, snap-action package. Available in packs of 10 or 20, these CE-certified mini switches feature both Normally Open (NO) and Normally Closed (NC) contacts on a single 3-pin terminal — giving you flexible control options for virtually any project.

Made in Mainland China.

Key Features

Model: KW11-3Z — industry-standard micro switch for wide compatibility
3-Pin Configuration: Common (COM), Normally Open (NO), and Normally Closed (NC) terminals for versatile wiring
Rated Current: 5A for reliable switching under real-world loads
Voltage Rating: 125V AC / 250V AC — suitable for both low and high voltage circuits
CE Certified: Meets European conformity safety standards
Handle & Handleless Options: Choose the lever/handle or handleless contact style to suit your application
Durable Plastic Housing: Lightweight yet rugged for long-term use
No High-Concern Chemicals: Safe materials, no hazardous substances
Value Packs: Choose 10-piece or 20-piece sets to stock up and save

Common Applications

3D printers (endstop / homing switches)
CNC machines and laser cutters
DIY robotics and automation projects
Home appliance repair (microwaves, washing machines, refrigerators)
Industrial equipment and control panels
Door and drawer position sensors

Technical Specifications

Model	KW11-3Z
Pins	3-Pin (COM, NO, NC)
Rated Current	5A
Voltage	125V AC / 250V AC
Certification	CE
Material	Plastic
Pack Size	10 or 20 pieces
Origin	Mainland China

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For more information on electrical component safety standards, visit the U.S. Consumer Product Safety Commission (CPSC).

Learn more: Limit switch

Frequently Asked Questions

Q: What is the difference between the NO and NC contacts on the KW11-3Z micro switch?

A: The Normally Open (NO) contact is open (no current flows) when the switch is at rest and closes when the actuator is pressed. The Normally Closed (NC) contact is the opposite — it is closed at rest and opens when the actuator is triggered. The Common (COM) pin is shared between both. This 3-pin design lets you choose the contact behavior that best suits your circuit.

Q: Are these KW11-3Z switches compatible with 3D printer endstops?

A: Yes! The KW11-3Z is one of the most popular micro switches used in 3D printers as endstop/homing switches. The compact size, reliable snap-action mechanism, and standard pin spacing make them a direct fit for most DIY and commercial 3D printer builds including RepRap-style designs.

Q: What is the maximum load these micro switches can handle?

A: These switches are rated for 5A at 125V AC or 250V AC. They are designed for moderate-load switching tasks. For high-current or high-voltage applications beyond these ratings, a relay or solid-state relay should be used in conjunction with the switch.

Q: Do these come with both handle and handleless versions?

A: Yes — you can select either the lever/handle style (which includes an actuating arm for easy mechanical triggering) or the handleless/button contact style (a bare plunger design for tight spaces or direct contact triggering). Check the available variant options when adding to your cart.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

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