The LJ12A34Z/AX is a 5V threewire proximity switch with an NPN normally closed (NC) output. Designed for direct use with microcontroller based control circuits, it provides noncontact sensing in a compact, rugged package. Key benefits Noncontact sensing reduces wear, maintenance, and contamination risk compared with mechanical switches. 5V logic compatibility allows straightforward integration with common microcontrollers and digital circuits. Normally closed NPN output offers a clear default state and simple sinking logic for microcontroller inputs. Threewire design (Vcc, GND, Output) simplifies wiring and power management. Suitable for compact installations in hobby projects or small industrial setups. Key attributes Model: LJ12A34Z/AX Supply voltage: 5V DC Output type: 3wire NPN normally closed (NC) Output behavior: In the absence of a target, the NC output conducts to ground; when a target is detected, the output opens Wiring: Brown = Vcc, Blue = GND, Black = Output (typical color coding for DC sensors) Interface: Direct connection to 5V logic circuits or microcontroller inputs Applications and use cases Endoftravel or homeposition sensing in small linear actuators or compact automation setups Object presence detection on a small conveyor or sorting line Replacement for traditional mechanical limit switches in hobby robotics or compact automation projects Wiring and integration notes Connect Brown to +5V, Blue to ground, and Black to a microcontroller input. Use a pullup resistor to 5V on the microcontroller input if required. When no target is present, the NC output will be closed to ground; when a target is detected, the output opens, resulting in a logic state change read by the microcontroller. Specifications at a glance Model: LJ12A34Z/AX Supply voltage: 5V DC Output: 3wire NPN normally closed Output configuration: NC sinking type suitable for read by 5V logic Wiring color (typical): Brown Vcc, Blue Gnd, Black Output This description reflects the product's brand, model, and features as specified, focusing on 5V operation, threewire NPN NC output, and microcontrollerfriendly integration, with clear guidance on usage and typical applications.