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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⚙️ Elevate your control game with precision micro-switch power!

BUILT TO LAST - Durable roller lever arm designed for consistent mechanical performance
RAPID RESPONSE - Short stroke action ensures fast-break switching to protect your devices
COMPACT POWERHOUSE - Small 20x10.5x6.5mm size fits tight spaces with ease
DUAL ACTION PRECISION - Normally Open and Normally Closed contacts for versatile control
UNIVERSAL COMPATIBILITY - Ideal for electronics, automotive, home appliances, and industrial automation

The HiLetgo KW12-3 Micro Limit Switch is a compact, high-performance SPDT switch rated for AC 125-250V and 5A current. Featuring a roller lever arm and both normally open and closed contacts, it delivers fast, reliable switching in a tiny 20x10.5x6.5mm package. Perfect for applications ranging from automotive electronics to home appliances and industrial automation, this 10-pack ensures you never run out of precision control components.

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Manufacturer	HiLetgo
Part number	3-01-1546
Item Weight	32 g
Package Dimensions	11 x 8.1 x 1.9 cm; 32 g
Item model number	3-01-1546
Colour	Black
Voltage	125 Volts, 250 Volts
Wattage	1250 watts
Item Package Quantity	1
Measurement System	Imperial
Switch Type	2-way
Batteries included?	No
Batteries Required?	No

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

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