Pack of 10 KW4-3Z-3 Micro Limit Switch Lever Arm 28mm Long with 3 Terminals 250VAC/125VDC 5A

Key Features

• Quantity: 10 switches per pack
• Model: KW4-3Z-3
• Actuator: 28mm long hinge lever arm
• Terminals: 3-pin configuration for Normally Open (N/O) and Normally Closed (N/C) circuits
• Electrical Rating: 5A at 125VDC / 250VAC
• Function: Snap-action switch designed to control the movement of mechanical parts in electrical systems.

Replaces / Cross-Reference Part Numbers

• KW4-3Z-3

Compatibility & Fitment

• Designed for use in a wide range of applications including appliances, 3D printers, CNC mills, and other general-purpose electrical automation projects.
• Fitment depends on matching physical dimensions, actuator type (28mm lever), and electrical specifications (5A, 125/250V).

When to Replace

• Switch fails to actuate or operates intermittently.
• The circuit remains open or closed regardless of lever position.
• Visible damage, such as a broken lever or cracked housing.
• Audible click is absent or feels inconsistent during actuation.

Installation Tips

• Disconnect all power to the equipment before beginning installation.
• Identify and connect wires to the appropriate terminals: Common (C), Normally Open (NO), and Normally Closed (NC).
• Ensure the mechanical component correctly engages and releases the lever without excessive force or over-travel.
• Securely mount the switch body to prevent movement during operation.