The Auspicious AZ-7140 is a lever type limit switch with a snap action mechanism in a compact side mount body. A cam, dog or machine carriage pushes the lever, and the contacts flip over at a fixed point regardless of how slowly that lever moves.

Snap action is the detail worth understanding here. In a slow make switch, the contacts drift apart as the actuator creeps, which draws an arc and burns the contact faces over time. A snap action mechanism stores energy in a spring and releases it all at once, so the changeover is fast and clean no matter how gradually the machine approaches. On slow moving equipment, that one difference decides how long the switch lasts.

The contact set is one normally open and one normally closed sharing a common terminal, which keeps wiring simple where both signals return to the same point. Rated 10A at 250V AC and 0.5A at 125V DC, it switches AC control circuits directly and feeds DC signals into a PLC. The oil tight and waterproof body suits machine tools, conveyors and equipment exposed to coolant and moisture.

Key Features

Snap action mechanism gives a fast, clean changeover at any approach speed
Reduced contact arcing and longer service life on slow moving machinery
Lever actuator reaches the moving part and tolerates small misalignment
Side mount body fits flat along frames and guide rails
1NO and 1NC contacts sharing a common terminal for simpler wiring
10A 250VAC and 0.5A 125VDC ratings
Operating speed range from 0.01mm to 50cm per second
Oil tight and waterproof construction, CE marked, made in Taiwan

Technical Specifications

Specification	Detail
Product Type	Side Mount Mini Limit Switch
Range of Product	AZ Series
Model	AZ-7140
Actuator	Lever, Snap Action
Mounting	Side Mount
Contact Configuration	1NO, 1NC and 1 Common
AC Rating	10A 250VAC
DC Rating	0.5A 125VDC
Operating Speed	0.01mm to 50cm per second
Protection	Oil Tight and Waterproof
Certification	CE Mark
Brand	Auspicious
Country of Origin	Taiwan
SKU	AZ-7140

Common Applications

Slow moving carriage and slide position detection, conveyor and indexing table stops, door and guard confirmation on machine tools, lift and gate travel limits, jig and fixture position sensing, packaging and assembly sequencing, and any cycle where the actuator is pushed gradually rather than struck quickly.

Choosing the Right Limit Switch

Actuator shape and contact behaviour are the two things to settle. If the moving part arrives gradually, snap action is worth having. For the same side mount lever body with a plain contact arrangement, the lever limit switch AZ-7120 is the simpler option.

Where the contact point varies or the target sits away from the switch, the adjustable roller lever limit switch AZ-8108 lets you set the lever length and adds a roller, and the adjustable rod limit switch AZ-8107 gives long reach onto irregular targets. For heavier duty, the 10A adjustable roller lever limit switch AZ-5108 has a larger body, and the big wheel limit switch AZ-5108L is built for lifts and cranes at IP67.

Where the push comes straight down, the roller plunger limit switch AM-1308 handles 15A, and the cross roller plunger limit switch ME-8122 accepts approach from more than one angle. If an overrun could snap a rigid lever, the spring limit switch AZ-8166 flexes and returns instead.

Why Buy From Qahraba

Qahraba supplies electrical contractors, panel builders and machine builders across the UAE and worldwide. Every limit switch we stock is genuine Auspicious product. Local UAE orders ship within 1 to 2 working days, free above AED 250, or collect free from our Dubai store. Call or WhatsApp +971 52 913 9543 for bulk pricing.

FAQ,s

What is a lever type limit switch?

It is a position sensing switch operated by a lever arm. A moving part pushes the lever, the contacts change over, and the signal tells the controller to stop, reverse or start the next step.

What does snap action mean?

The contacts change over instantly once the lever passes a set point, rather than drifting apart as the lever moves. A spring stores and releases the energy, which keeps the switching clean even when the machine approaches slowly.

Why does snap action matter?

Because slow changeover draws an arc that burns the contact faces. On slow moving machinery a snap action switch lasts considerably longer than a slow make equivalent.

What does 1NO 1NC with a common contact mean?

The switch has one normally open and one normally closed contact that share a single common terminal. It means three terminals instead of four, which simplifies wiring when both signals return to the same point.

What is the difference between the AZ-7140 and the AZ-7120?

Both are side mount lever switches rated 10A. The AZ-7140 adds the snap action mechanism and uses a shared common terminal, so it suits slow approach applications. The AZ-7120 is the simpler and cheaper of the two.

Can it connect directly to a PLC?

Yes. The 0.5A 125VDC rating covers standard 24V DC PLC inputs, and the 10A 250VAC rating allows direct switching of AC control circuits.

Lever Type Limit Switch Snap Action 10A AZ-7140 Auspicious