4 legs Metal Dome(tactile metal domes, or metal snap domes)are four-legged switch contacts that were designed specifically for mounting on single or double sided printed circuit boards, flex circuits and membranes, where traces can be fed under the domes on the same side of the board. They come in eight different sizes, and can be used for contact or tactile element only.

The 4 legs Metal Dome are placed on a PC board by means of pressure sensitive adhesive tape. In their relaxed state they rest on the outer rim of the primary pathway. When they are pushed, the centers of the domes collapse and make contact with the secondary pathway, thereby closing the circuit.

We not only pack metal dome in normal bulk, but also can put each dome on a array and with Adhesive tape on its top, so that you can just peel off each piece and put it on key location of Keyboard/FPC/PCB.

The size of 4 legs Metal Dome is from 5mm to 20mm in a range of (trip) force, typical 125- 500 g. The trip force, rebound/return force, click, travel, and height, etc., can be adjustable according to clients' request. No matter what size or force you require, we'll do our best to produce it. Contact us now for more!

• Contact Configuration: SPST, Normally Open
• Contact Bounce (on) : <.3ms
• Contact Bounce (off) : <6ms
• Operating Temperature: -55 C to 125 C
• Storage Temperature: -55 C to 125 C
• Humidity: 0-97% (no condensation)
• Contact Resistance:<100 ohms
• With gold or silver plating: <1 ohm
• Voltage/Current Maximum: 12 ma @ 24 volts DC, RL
• Breakdown Voltage: Over 200 volts