12 x 12 SMD Tactile Switch 1
12 x 12 SMD Tactile Switch
B3FS-4
Surface-mounting Switches
with 12 x 12 mm size
• Surface-mounting device of B3F-4 series.
• Distinctive snapping action and extended mechanical and
electrical service life.
• Available in embossed taping packages for automatic
mounting.
• B32 series Keycaps are available for the projected plunger
models
• RoHS Compliant
Ordering Information
Note: Order in multiples of the minimum order unit. Switches are not sold individually.
Specifications
■Characteristics
Note: Data shown are of initial value
■Operating Characteristics
Type Plunger Height Operating force (OF) Plunger Color Embossed tape
Model Quantity per reel
12x12mm
(Flat) 4.3 mm
150 gf
(1.47 N)
Black
B3FS-4002P
1,000
260 gf
(2.55 N) B3FS-4005P
12x12mm
(Projected Plunger) 7.3 mm
150 gf
(1.47 N) B3FS-4052P
500
260 gf
(2.55 N) B3FS-4055P
Contact form SPST-NO
Switching capacity 1 to 50 mA at 5 to 24 VDC (resistive load)
Minimum permissible load (reference value) 10 μA at 1 VDC (resistive load)
Contact resistance 100 mΩmax. (rated: 1 mA at 5 VDC)
Insulation resistance 100 MΩ(at 250 VDC)
Dielectric strength 500 VAC, 50/60 Hz for 1 min.
Vibration resistance Malfunction: 10 to 55 Hz, 1.5-mm double amplitude
Shock resistance Destruction: 1,000 m/s2(approx. 100 G) max.
Malfunction: 100 m/s2(approx. 10G) max.
Ambient operating temperature −25 to 70°C (at 60% RH max.) with no icing or condensation
Ambient operating humidity 35% to 85% (at 5 to 35°C)
Service Life 3,000,000 operations min. (OF: 150 gf (1.47 N))
1,000,000 operations min. (OF: 260 gf (2.55 N))
Weight Approx. 1g
Characteristics B3FS-4002P B3FS-4052P B3FS-4005P B3FS-4055P
Operating force (OF) 150 ±50 gf (1.47 ±0.49 N) 260 ±70 gf (2.55 ±0.69 N)
Release force (RF) min. 15 gf (0.15 N) 30 gf (0.29 N)
Pretravel (PT) 0.25 ±0.15 mm
2B3FS-4
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.
B3FS-4002P
B3FS-4005P
B3FS-4052P
B3FS-4055P
2
4
1
3
(BOTTOM VIEW)
12±0.2
15
1
1
5
±0.2
12
±0.2
4.3
±0.2
0.4 max.
0.1
7.1 dia.
4
2
3
1
16.6±0.1
12±0.1
2.6
±0.1
7.4
±0.1
PCB Pad (Example)
(Top View)
Terminal Arrangement/
Internal Connection
(Top View)
12±0.2
15
3.85 3.85
1
1
5
±0.2
12
±0.2
4.3
7.3
0.4 max.
0.1
7.1 dia.
4
2
3
1
16.6±0.1
12±0.1
2.6
±0.1
7.4
±0.1
PCB Pad (Example)
(Top View)
Terminal Arrangement/
Internal Connection
(Top View)
B3FS-4 3
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.
■Precautions for Correct Use
Soldering
General Precautions
Before soldering the Switch on a multilayer PCB, test to confirm that
soldering can be performed properly. Otherwise the Switch may be
deformed by the soldering heat on the pattern or lands of the multilayer
PCB.
Do not solder the Switch more than twice, including rectification
soldering. An interval of five minutes is required between the first and the
second soldering, or it may result in melting housing and deterioration of
operating characteristics.
Reflow Soldering (Surface Mounting)
Solder the terminals within the heating curve shown in the following diagram.
Note: The above heating curve applies if the PCB thickness is 1.6 mm.
The peak temperature may vary depending on the reflow bath used.
Confirm the conditions beforehand.
Do not use an automatic soldering bath for surface-mounted Switches.
The soldering gas or flux may enter the Switch and damage the Switch's
plunger operation.
Manual Soldering
Soldering temperature: 350 degC max. at the tip of the soldering iron
Soldering time: 3 s max. for a 1.6-mm thick, single-side PCB
Before soldering the Switch on a PCB, make sure that there is no
unnecessary space between the Switch and the PCB.
Washing
This switch cannot be washed.
Doing so will cause the washing agent, together with flux or dust
particles on the PCB, to enter the Switch, resulting in malfunction.
PCBs
If the PCBs are separated after mounting the Switch, particles from the
PCBs may enter the Switch. If PCB particles or foreign particles from the
surrounding environment, workbench, containers, or stacked PCBs
become attached to the Switch, contact failure may result.
RoHS Compliant
The "RoHS Compliant" designation indicates that the listed models
do not contain the six hazardous substances covered by the RoHS
Directive.
Reference:
The following standards are used to determine compliance for the six substances.
Lead: 1,000 ppm max.
Mercury: 1,000 ppm max.
Cadmium: 100 ppm max.
Hexavalent chromium: 1,000 ppm max.
PBB: 1,000 ppm max.
PBDE: 1,000 ppm max.
Packaging Specifications for Embossed Taping
Temperture (°C)
180
220
250 max.
Room
temperture
150 Preheating Heating
Time (s)
60 to 120 Max.60
ø13.2
ø380±2
16±0.1
Reel (Material: PS) Label
Tape drawing direction
Tape drawing direction
Tape drawing direction
(29)
4±0.1 (5.6)
2A
24
11.5
1.75
1.5+0.1
0
dia.
A
16±0.1
4±0.1 (8.5)
2A
24
11.5
1.75
1.5+0.1
0
dia.
A
B3FS-4002P
B3FS-4005P
B3FS-4052P
B3FS-4055P
4B3FS-4
OMRON ON-LINE
Global - http://www.omron.com
USA - http://www.components.omron.com
Cat. No. A203-E-02 Printed in USA
OMRON ELECTRONIC
COMPONENTS LLC
847-882-2288
03/14 Specifications subject to change without notice
All sales are subject to Omron Electronic Components LLC standard terms and conditions of sale, which
can be found at http://www.components.omron.com/components/web/webfiles.nsf/sales_terms.html
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
