256

Tactile Switch (SMD)

B3SN

Engineering Data

■ Operating Force vs. Stroke

(typical example)

■ Construction

Dimensions

Note: 1. Unless otherwise specified, all units are in millimeters and a tolerance of

± 0.4 mm applies to all dimensions.

2. Terminal numbers are not indicated on this switch. With the switch turned over so that the logo mark “OMRON” is visible on the upper

part of the rear side of the switch base, the terminal on the right of the logo mark is numbered “1” and that on the bottom right is “3.”

Accordingly, two terminals on the left side are numbered “2” and “4” respectively.

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.

Film

Pushbutton

Cover

Terminals

Plunger

Contact dome

Fixed contact

Base

Without Ground Terminal

B3SN-3012

B3SN-3012P

B3SN-3012G

With Ground Terminal

B3SN-3112

B3SN-3112P

PCB Pad

(Top View)

Terminal Arrangement

/Internal Connections

(Top View)

PCB Pad

(Top View)

Terminal Arrangement

/Internal Connections

(Top View)

3 dia.

2

6

4

9.5

(4.6)

6.5

0.7

0.1

1.2

6

2.6

5.4

4

2

3

1

3 dia.

2

4

9.5

(4.6)

6.5

0.7

0.7

0.1

1.2

6

2.6

1.4

5.4

4

2

3

5

1

6

-0.0

-0.0