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 Micro Limit Switch KW12-3 AC 250V 5A SPDT 1NO 1NC Micro Switch Normally Open Close Limit Switch with Roller Lever Arm Black

HiLetgo 10pcs Micro Limit Switch KW12-3 AC 250V 5A SPDT 1NO 1NC Micro Switch Normally Open Close Limit Switch with Roller Lever Arm Black

Product ID: 193693076

Details

Brand
HiLetgo
Connector Type
Smt
Contact Type
Normally Open
Current Rating
5 Amps
Item dimensions L x W x H
3.94 x 7.87 x
Material
Plastic

⚡5A current rating

🔄SPDT 1NO 1NC dual contact

🎛️Compact 20x10.5x6.5mm size

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฿1270

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Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎯 Micro precision meets powerhouse performance — don’t let your projects settle for less!

ROBUST RELIABLE - Rated for AC 125-250V and 5A current, built to handle demanding industrial and consumer electronics.
COMPACT POWERHOUSE - Small footprint (20x10.5x6.5mm) fits effortlessly into tight spaces without compromising performance.
DUAL MODE FLEXIBILITY - Seamlessly toggle between Normally Open and Normally Closed states for versatile applications.
ROLLER LEVER ADVANTAGE - Smooth mechanical actuation with roller lever arm ensures consistent, low-friction operation.
PRECISION MICRO CONTROL - Experience ultra-responsive switching with a short stroke and fast-break contact action.

The HiLetgo KW12-3 Micro Limit Switch is a compact, high-performance electrical switch featuring a roller lever arm and dual contact modes (Normally Open and Normally Closed). Rated for AC voltages up to 250V and 5A current, it delivers fast, reliable switching in a small 20x10.5x6.5mm package. Ideal for precision control in electronics, automotive, home appliances, and industrial automation, this 10-pack offers durable, panel-mountable switches with nickel-plated contacts and IP54 protection.

Specifications

ASIN	B07X142VGC
Actuator Type	Lever
Best Sellers Rank	#5,399 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Limit Switches
Brand Name	HiLetgo
Circuit Type	2-way
Color	Black
Compatible Devices	computer mouse, car mouse, automobile electronic products, communications equipment, military products, test instrument, gas water heater, gas burner, small home appliance, microwave oven, electric rice cooker, floating ball supporting equipment, medical equipment, building automation, electric tools
Compatible with Vehicle Type	automobile
Connectivity Protocol	X-10
Connector Type	Smt
Contact Material	Nickel-plated Metal
Contact Type	Normally Open
Control Method	Touch
Control Type	manual
Current Rating	5 Amps
Customer Reviews	4.7 4.7 out of 5 stars (685)
International Protection Rating	IP54
Item Dimensions	3.94 x 7.87 x 14.57 inches
Manufacturer	HiLetgo
Material Type	Plastic
Model	3-01-1546
Mounting Type	Panel Mount
Number of Items	10
Number of Positions	2
Operating Voltage	250 Volts
Operation Mode	manual
Part Number	3-01-1546
Specification Met	Ip54
Switch Type	Limit Switch
Terminal	Screw
Unit Count	10.0 Count
Wattage	1250 watts

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