Can i use these with DC voltages?

These switches are rated at 5/120 and 3/240 AC , contacts are silver plated which is good for AC but not for DC since platting is so thin and contact resistance so good you will end up with weld contacts, I have been using these switches on 30 ma up to 500ma no problem what so ever

I'm not an electronics person, so I'm not sure how to read the diagram; what are each of the terminals for? How do you wire this switch into a circuit

It depends on the circuit which you will be wiring the switch into. A wire needs to be connected to the (C)ommon connection opposite of the roller. You then need to determine if you need the switch in the open or closed position when the switch is not activated. I use the common and the normally open for my CNC milling machine limit switches.

Any recomendation of spade Wire Connector for it? 3.3mm is odd size.

the connections are solder lugs, not too well suited for use with a female spade connector. The switch dimensions dictate the size of the connections, and limit them so that, when installed, the connections won't contact a mounting surface. Plus -- the nature of use, with something actuating the switch mechanically, somewhat dictates a more mechanically secure connection than you might expect with a push-on connector. If you must use one, consider a short flexible wire pigtail soldered to each terminal, then add the connector of choice to the end of that wire for your chosen connector.

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HiLetgo 10PCS Kw12-3 Ac 250V 5A Spdt 1No 1Nc Micro Limit Switch Normally Open Close Limit Switch with Roller Lever Arm Black

HiLetgo 10PCS Kw12-3 Ac 250V 5A Spdt 1No 1Nc Micro Limit Switch Normally Open Close Limit Switch with Roller Lever Arm Black

Product ID: 715603524

Details

Brand
HiLetgo
Connector type
Smt
Contact type
Normally Open
Operation mode
manual
Switch type
Limit Switch

⚡5A current rating

🔄SPDT 1NO 1NC versatile contacts

🎛️Compact 20x10.5x6.5mm size

€ 24.39

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Description

🎯 Switch to precision — never miss a beat with HiLetgo micro limit switches!

COMPACT POWERHOUSE - Small footprint (20x10.5x6.5mm) packs a punch with 250V AC and 5A current rating.
DURABLE ROLLER LEVER - Engineered with a smooth roller arm for reliable mechanical actuation and extended lifespan.
DUAL CONTACT FLEXIBILITY - Seamlessly toggle between Normally Open and Normally Closed states to fit any project need.
PRECISION INSTANT ACTION - Experience lightning-fast switching with minimal contact spacing for ultra-responsive control.
VERSATILE INDUSTRIAL GRADE - Perfect for automation, automotive, medical devices, and smart home innovations—stay ahead of the tech curve.

The HiLetgo KW12-3 Micro Limit Switch pack includes 10 compact, durable switches featuring a roller lever arm and SPDT contacts rated for 250V AC and 5A. Designed for fast, reliable mechanical actuation, these switches excel in diverse applications from automotive electronics to smart home devices, offering professional-grade performance in a sleek, space-saving design.

Specifications

ASIN	B07X142VGC
Brand	HiLetgo
Brand Name	HiLetgo
Color	black / black
Connector Type	Smt
Connector type	Smt
Contact Type	Normally Open
Contact type	Normally Open
Customer Reviews	4.7 out of 5 stars 675 Reviews
International Protection Rating	IP54
Item Dimensions	10 x 20 x 37 centimeters
Manufacturer	HiLetgo
Material Type	Plastic
Model	3-01-1546
Mounting Type	PCB Mount
Number of Items	10
Operation Mode	manual
Operation mode	manual
Part Number	3-01-1546
Switch Type	Limit Switch
Switch type	Limit Switch
Terminal	Spdt
Unit Count	10.0 Count
Wattage	1250 watts

Reviews

A**R

جيد جدا

26.10.2025

A**R

Good switches for the price

So far so good! These come in a pack of 10 which makes this a pretty good value. I cannot attest to durability since they have not been in use for long enough, but they do seem solid. Response on these seems proper. I am using them in a slightly non-conventional way (as a button of sorts) but they are doing the job nicely.

21.01.2026

M**.

solid function

Solid little micro switches. Have stood up to time and continue to work.

15.06.2025

V**Z

Buen producto

Llegaron en buenas condiciones

13.05.2026

W**E

Junk

Junk only last 20 minutes that start screwing up

21.06.2025

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€ 24.39

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

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