12

±0.2

5

±0.2

12

±0.2

4.3

±0.2

3.5

7.3

±0.2

1.8

±0.2

3.5

0.3

12.5

±0.5

13.8

±0.5

7.1 dia

11

9

±0.1

j3.8±0.1

Two 1.8

±0.05 dia

5

±0.1

Four

1.2

±0.0

5

dia

12.5

±0.1

9

±0.1

4

3

21

12

±0.2

5

±0.2

12

±0.2

1.6

j3.8±0.1

4.3

±0.2

3.5

7.3

±0.2

0.9

0.3

12.5

±0.5

13.8

±0.5

7.1 dia

11

9

±0.1

Two 1.8

±0.05 dia

5

±0.1 9±0.1

Five

1.2

±0.0

5

dia

12.5

±0.1

6.9

±0.1

4

3

21

5

Standard, Long Life Expectancy,

High Reliability, Projected Plunger

Type (without Ground Terminal)

B3F-4050, -4055, -5050, -5051

Standard, Long Life Expectancy,

High Reliability, Projected Plunger

Type (with Ground Terminal)

B3F-4150, -4155, -5150, -5151

PCB Mounting

(Top View)

Terminal Arrangement

/Internal Connections

(Top View)

PCB Mounting

(Top View)

Terminal Arrangement

/Internal Connections

(Top View)

1.8

±0.2

3.5

12

±0.2

15

±0.2

12

±0.2

5

±0.2

7.3

±0.2 6.3

3.5

0.7

0.3

0.5

13.8

±0.5

4.5

4

1

1

9

±0.1

0.25

13.5

±0.5

0.25

Two 1.8

±0.05 dia

5

±0.1

Six 1.2

±0.05 dia

12.5

±0.1

9

±0.1

13.8

±0.1

Surface Illumination Type

B3F-9100, -9200, -9300

PCB Mounting

(Top View)

Terminal Arrangement

/Internal Connections

(Top View)

4

12.5

±0.5

j10

8.4 dia.

7.1 dia.

Precautions

moving.

solvents if either wiped off using solvents or immersed in

solvents.

side of the PCB.

switches may be damaged due to instability or heat from

soldering if other PCBs (other thickness or through holes) are

used. If it is necessary to use another PCB, test the compatibility

and processing in advance.

sheet as shown below when used in dust-prone environments.

Resin sheets

Switch

Keytop