Mechanical Key Switch
A Wide Range of Models: 6 x 6 mm, 12 x
12 mm, Vertical and High-force.
IB3F
iIB3F
Excellent tactile feel combined with high life
expectancy.
Available in stick packaging for automatic
mounting to PCBs.
Up to 2.55 N (260-gf) operating force for a firmer
operating touch.
Pushbuttons available in nine colors.
Ordering Information
6 x 6 mm Models
Type
Standard
(B3F-1jjj)
5.0 x 6.5 mm
Plunger
Flat
Height x pitch
4.3 x 6.5 mm
Operating
force (OF)
0.98 N (100 gf)
1.47 N (150 gf)
2.55 N (260 gf)
0.98 N (100 gf)
1.47 N (150 gf)
2.55 N (260 gf)
5.0 x 7.5 mm
Projected
7.3 x 6.5 mm
0.98 N (100 gf)
0.98 N (100 gf)
1.47 N (150 gf)
2.55 N (260 gf)
Extended
Vertical
(B3F-3jjj)
3.85 mm
Flat
9.5 x 6.5 mm
3.15 mm
0.98 N (100 gf)
0.98 N (100 gf)
1.47 N (150 gf)
2.55 N (260 gf)
0.98 N (100 gf)
1.47 N (150 gf)
2.55 N (260 gf)
Projected
6.15 mm
0.98 N (100 gf)
1.47 N (150 gf)
2.55 N (260 gf)
*
(100 / bag)
Plunger type
Appearance
4.3 or
7.3
9.5
Without ground terminal
Bags *
B3F-1000
B3F-1002
B3F-1005
B3F-1020
B3F-1022
B3F-1025
---
B3F-1050
B3F-1052
B3F-1055
B3F–1070
---
---
---
---
---
---
---
---
---
Sticks (90/stick)
B3F-1000S
B3F-1002S
B3F-1005S
B3F-1020S
B3F-1022S
B3F-1025S
---
B3F-1050S
B3F-1052S
B3F-1055S
---
---
---
---
---
---
---
---
---
---
With ground terminal
Bags *
B3F-1100
B3F-1102
B3F-1105
B3F-1120
B3F-1122
B3F-1125
B3F-1110
B3F-1150
B3F-1152
B3F-1155
---
B3F-3100
B3F-3102
B3F-3105
B3F-3120
B3F-3122
B3F-3125
B3F-3150
B3F-3152
B3F-3155
Sticks (75/stick)
B3F-1100S
B3F-1102S
B3F-1105S
B3F-1120S
B3F-1122S
B3F-1125S
---
B3F-1150S
B3F-1152S
B3F-1155S
---
---
---
---
---
---
---
---
---
---
Flat
Projected
Extended
Flat (vertical)
Projected (vertical)
3.15 or 3.85
6.15
B3F
12 x 12 mm Models
Type
Plunger (or
LED color)
Flat
Projected
Long life
expectancy
(B3F-5jj0)
High reliability
gold-plated
(B3F-5jj1)
Surface
illumination
Flat
Projected
Flat
Projected
Red LED
Green LED
Height x pitch
Operating
force (OF)
1.27 N (130 gf)
2.55 N (260 gf)
7.3 x 12.5 mm
4.3 x 12.5 mm
7.3 x 12.5 mm
4.3 x 12.5 mm
7.3 x 12.5 mm
7.3 x 12.5 mm
1.27 N (130 gf)
1.27 N (130 gf)
1.27 N (130 gf)
2.55 N (260 gf)
1.27 N (130 gf)
Without ground terminal
Bags **
Standard
(B3F-4jjj)
4.3 x 12.5 mm
B3F-4000
B3F-4005
B3F-4050
B3F-4055
B3F-5000
B3F-5050
B3F-5001
B3F-5051
---
---
---
Sticks (45/stick)*
B3F-4000S
B3F-4005S
B3F-4050S
B3F-4055S
B3F-5000S
B3F-5050S
B3F-5001S
B3F-5051S
B3F-9100
B3F-9200
B3F-9300
B3F
With ground terminal
Bags **
B3F-4100
B3F-4150
B3F-4150
B3F-4155
B3F-5100
B3F-5150
B3F-5101
B3F-5151
---
---
---
Sticks (45/stick)
B3F-4100S
B3F-4105S
B3F-4150S
B3F-4155S
B3F-5100S
B3F-5150S
B3F-5101S
B3F-5151S
---
---
---
Yellow LED
(B3F-9jjj)
*
36 per stick for B3F-9jjj.
**
(100 / bag)
Accessories (order separately)
Special keytops are available for projected plunger models. See page 27 (Product B32).
Specifications
Ratings
Switching capacity
Insulation voltage
5 to 24 VDC, 1 to 50 mA (resistive load)
30 VDC
Characteristics
Contact form
Contact resistance
Insulation resistance
Dielectric strength
Bounce time
Vibration resistance
Shock resistance
Life expectancy
SPST-NO
100 mΩ max. (at 5 VDC, 1 mA; initial value.)
100 MΩ min. (at 250 VDC)
500 VAC, 50/60 Hz for 1 min
5 ms max.
Malfunction: 10 to 55 Hz, 1.5 mm double amplitude
Destruction: 1,000 m/s
2
min. (Approx. 100 G min.)
Malfunction: 100 m/s
2
min. (Approx. 10G min.)
B3F-1jjj, -3jjj:
100-gf OF: 1,000,000 operations min.
150-gf OF: 300,000 operations min.
260-gf OF: 100,000 operations min.
B3F-4jjj:
130-gf OF: 3,000,000 operations min.
260-gf OF: 1,000,000 operations min.
B3F-5jjj: 10,000,000 operations min.
B3F-9jjj: 1,000,000 operations min.
–25°C to 70°C (with no icing)
35% to 85%
6 x 6 mm models: approx. 0.25 g
12 x 12 mm models: approx. 0.85 g
Ambient temperature
Ambient humidity
Weight
Operating Characteristics
Model
100 gf models
B3F-1jj0, -3jj0
Operating force (OF)
Reset force
(RF min.)
Pretravel (PT)
0.98±0.32 N
(100±30 gf)
0.2 N (20 gf)
0.25
+0.2
/
–0.1
mm
B3F-1jjj, -3jjj
150 gf models
B3F-1jj2, -3jj2
1.47±0.49 N
(150±50 gf)
0.49 N (50 gf)
260 gf models
B3F-1jj5, -3jj5
2.55±0.69 N
(260±70 gf)
0.49 N (50 gf)
B3F-4jjj, -5jjj, -9jjj
130 gf models
B3F-4jj0,
-5jj0, -9jj0
1.27±0.49 N
(130±50 gf)
0.29 N (30 gf)
0.3
+0.2
/
–0.1
mm
260 gf models
B3F-4jj5
2.55±0.69 N
(260±70 gf)
0.49 N (50 gf)
B3F
B3F
Engineering Data
Operating Force vs. Stroke (Typical)
B3F-1jjj, -3jjj
B3F-4jjj, -5jjj, -9jjj
OF: 260 gf
Forward Current Derating
Curve
Operating force (gf)
Operating force (gf)
OF: 150 gf
OF: 130 gf
OF: 100 gf
Stroke S (mm)
Stroke S (mm)
Note:
Forward current (mA)
Ambient temperature (°C)
To determine illuminated current of
surface illumination types
(B3F-9jjj), refer to the above for-
ward current derating curve.
Dimensions
Note:
1. Unless otherwise stated, a tolerance of
±
0.4mm applies to all dimensions
2. No terminal numbers appear on the switches. To orient a switch in the “bottom view” position, turn it so that the terminals are on
the up and down sides and the word OMRON is right-side up.
(Bottom view)
6 x 6 mm Models
Standard, Flat Plunger Type
(without Ground Terminal)
B3F-1000, -1002, -1005,
-1020**, -1022**, -1025**
6±0.2
PCB Mounting
(Top View)
Standard, Flat Plunger Type
(with Ground Terminal, Pitch: 6.5 mm)
B3F-1100, -1102, -1105,
PCB Mounting
-1120**, -1122**, -1125**
(Top View)
6±0.2
4.5±0.1
6±0.2
4.5±0.2
4.1±0.1
4.5±0.1
6±0.2
4.5±0.2
6.5±0.1
Four 1±0.05 dia
3.5 dia
1.5
3.5 dia
6.5±0.1
4.3±0.2**
3.5
6.5±0.5
7.7±0.5
3.4
0.3
Terminal Arrangement
/Internal Connections
(Top View)
4
0.7
0.7
2
1
3
4.3±0.2**
3.5
6.5±0.5
7.7±0.5
3.4
Terminal Arrangement
/Internal Connections
(Top View)
4
0.7
0.7
Five
1±0.05
dia
3
0.3
2
5
1
**Height of B3F-1020, -1022, -1025 is 5±0.2 mm.
**Height of B3F-1120, -1122, -1125 is 5±0.2 mm.
Standard, Projected Plunger Type
(without Ground Terminal)
B3F-1050, -1052, -1055
PCB Mounting
(Top View)
6±0.2
4.5±0.1
6±0.2
4.5±0.2
6.5±0.1
Four 1±0.05 dia
Standard, Projected Plunger Type
(with Ground Terminal)
B3F-1150, -1152, -1155
6±0.2
PCB Mounting
(Top View)
4.5±0.2
4.5±0.1
4.1±0.1
1.5
6±0.2
j2.4±0.1
1.8±0.1
7.3±0.2
4.3±0.2
3.5
6.5±0.5
3.4
3.5 dia
j2.4±0.1
3.5 dia
1.8±0.1
Terminal Arrangement
/Internal Connections
(Top View)
7.3±0.2
4.3±0.2
4
3
3.5
Five
1±0.0
Terminal Arrangement
/Internal Connections
5 dia
6.5±0.1
3.4
0.3
(Top View)
4
3
0.3
2
0.7
7.7±0.5
0.7
1
6.5±0.5
7.7±0.5
2
0.7
0.7
5
1
B3F
Extended Type
B3F-1070
6±0.2
B3F
PCB Mounting
(Top View)
4.5±0.2
6±0.2
4.5±0.1
3.5 dia
3 dia
6.5±0.1
four 1.0
dia
±
0.05
9.5
Max. 0.5
3.4
Internal Connec-
tions
(Top View)
3.5
0.3
6.5±0.5
7.5±0.5
0.7
0.7
Vertical, Flat Plunger Type
(Height: 3.15 mm)
(Height: 3.85mm)
B3F-3100, -3102,
B3F-3120, -3122,
-3105
-3125
7.3
Vertical, Projected Plunger Type
(Height: 6.15 mm)
B3F-3150, -3152, -3155
PCB Mounting
7.3
(Top View)
Two 1.5±0.05 dia
PCB Mounting
(Top View)
Two 1.5±0.05 dia
6.25
6.25
2.5±0.1
3.5 dia
4.5±0.1
7±0.1
Two 1±0.05 dia
7.4
4
3.5
0.7
4.5±0.5
7±0.5
8.7
0.3
0.3
2.25
1
7.4
2.5±0.1
4.5±0.1
7±0.1
3.5 dia
j2.4±0.1
4
3.5
0.7
4.5±0.5
7±0.5
8.7
0.3
0.3
2.25
6.15±0.2
1
2.5±0.5
1.8±0.1
Two 1±0.05 dia
Terminal Arrangement
/Internal Connections
(Top View)
Terminal Arrangement
/Internal Connections
(Top View)
2.5±0.5
3.15±0.2/3.85±0.2
12 x 12 mm Models
Standard, Long Life Expectancy,
High Reliability, Flat Plunger Type
(without Ground Terminal)
B3F-4000, -4005, -5000, -5001
PCB Mounting
(Top View)
Two 1.8±0.05 dia
Standard, Long Life Expectancy,
High Reliability, Flat Plunger Type
(with Ground Terminal)
B3F-4100, -4105, -5100, -5101
PCB Mounting
(Top View)
Two 1.8±0.05 dia
12±0.2
5±0.1 9±0.1
5±0.1 9±0.1
12±0.2
5±0.2
6.9±0.1
12±0.2
12±0.2
5±0.2
7.1 dia
12.5±0.1
Four 1.2±0.05 dia
1.6
7.1 dia
4.3±0.2
3.5
3.5
Terminal Arrangement
/Internal Connections
(Top View)
4
3
Five
1.2±0.0
5
Terminal Arrangement
dia
/Internal Connections
12.5±0.1
4.3±0.2
3.5
0.9
3.5
(Top View)
4
3
0.3
12.5±0.5
13.8±0.5
1
1
9±0.1
0.3
2
1
12.5±0.5
13.8±0.5
1
1
9±0.1
2
5
1
B3F
Standard, Long Life Expectancy,
High Reliability, Projected Plunger
Type (without Ground Terminal)
B3F-4050, -4055, -5050, -5051
PCB Mounting
(Top View)
Two 1.8±0.05 dia
12±0.2
5±0.1 9±0.1
12±0.2
5±0.2
12.5±0.1
j3.8±0.1
1.8±0.2
7.3±0.2
4.3±0.2
3.5
0.3
12.5±0.5
13.8±0.5
4
1
1
9±0.1
2
1
3
7.1 dia
Four 1.2±0.05
dia
1.6
12.5±0.1
7.1 dia
j3.8±0.1
1.8±0.2
12±0.2
5±0.2
6.9±0.1
12±0.2
B3F
Standard, Long Life Expectancy,
High Reliability, Projected Plunger
Type (with Ground Terminal)
B3F-4150, -4155, -5150, -5151
PCB Mounting
(Top View)
Two 1.8±0.05 dia
5±0.1 9±0.1
Five 1.2±0.05
dia
3.5
Terminal Arrangement
/Internal Connections
(Top View)
7.3±0.2
4.3±0.2
3.5
Terminal Arrangement
/Internal Connections
(Top View)
4
3
3.5
0.9
12.5±0.5
13.8±0.5
0.3
2
1
1
9±0.1
5
1
Surface Illumination Type
B3F-9100, -9200, -9300
12±0.2
PCB Mounting
(Top View)
Two 1.8±0.05 dia
15±0.2
12±0.2
5±0.2
13.8±0.1
5±0.1 9±0.1
j10
8.4 dia.
7.1 dia.
Six 1.2±0.05 dia
12.5±0.1
7.3±0.2 6.3
3.5
0.7
0.5
12.5±0.5
13.8±0.5
0.3
Terminal Arrangement
/Internal Connections
(Top View)
4
4.5
1
1
9±0.1
0.25
13.5±0.5
0.25
4
Precautions
•
•
•
•
•
Do not apply additional force to the plunger once it has stopped
moving.
Solder at 260°±5°C within five seconds and within two tries.
Do not wash the switches. The switches may be damaged by
solvents if either wiped off using solvents or immersed in
solvents.
Do not allow flux or flux foam to penetrate onto the component
side of the PCB.
Use a single-sided PCB with a thickness of 1.6 mm. The
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.
The switches are not sealed and should be protected with a resin
sheet as shown below when used in dust-prone environments.
Keytop
•
Resin sheets
Switch
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