272

Ultra-low Profile Dome Key

B3D

PCB Pattern Diagrams

B3D-4112

B3D-5112

Precautions

■ Attaching to the PCB

Remove the Dome Key from the sheet using tweezers or a vacuum

pick-up tool, and attach it above the contact on the PCB surface,

which has been wiped clean in advance. Press down on the top sur-

face using an elastic material, such as urethane rubber, and a force

of 2.94 to 4.9 N. Place a positioning mark (circle) on the PCB for

easy positioning.

Make sure that the position of the Dome Key is aligned correctly

before use. Significant misalignment may result in short-circuits or

reduced sensitivity.

Note: The recommended vacuum pick-up tool is the Hozan P-835

Vacuum Pick with an M suction pad (7-mm dia.).

Do not reuse a B3D Dome Key that has been detached from the

PCB. Attach a new Dome Key to the PCB.

Do not touch the contact dome with bare hands, or with unclean

gloves. Doing so may damage the contact dome, which is the part

that comes in contact with the PCB.

■ Reflow Soldering

The Dome Key cannot withstand heat from reflow soldering. Always

perform reflow soldering before attaching the Dome Key to the PCB.

■ Washing

Do not wash the Dome Key. The Dome Key is not water-resistant and

must not be exposed to water or other liquids.

■ Common Precautions

Be sure to read the precautions common to all Tactile Switches,

contained in the Technical User’s Guide, “Tactile Switches, Technical

Information” for correct use.