Omron B3F Manual

Tactile Switches Technical Information 1
Tactile Switches
Technical Information
Cautions
Use the Switch within the rated voltage and current ranges, other-
wise the Switch may have a shortened life expectancy, radiate heat,
or burn out.
This particularly applies to the instantaneous voltages and currents
when switching.
Correct Use
■Storage
Storage Environment
To prevent degradation, such as discoloration of the terminals during
storage, do not store the Switch in locations that are subject to the
following conditions;
•High temperature or humidity
•Corrosive gases
•Direct sunlight
Storage condition
Store the Switches in the packaging box.
After the packaging box is opened, use the contents as quickly as
possible. When storing leftover parts, make sure that appropriate
measures are taken against humidity and corrosive gases.
■Handling
1. Operation
Do not repeatedly operate the Switch with excessive force. Applying
excessive pressure or applying additional force after the plunger has
stopped may deform the contact dome of the Switch, resulting in mal-
function. In particular, applying excessive force to side-operated
switches may damage the caulking, which in turn may damage the
switch. Do not apply force exceeding the maximum (29.4N {300 gf}
for 1 minute, one time) when installing or operating side-operated
switches.
Be sure to set up the Switch so that the plunger will operate in a
straight vertical line. A decrease in the life of the Switch may result if
the plunger is pressed off-center or from an angle.
Tactile Switch is not recomended to use for detection purposes.
Omron's Detection or Snap-action switches are recommended for
this purpose.
2. Dust Protection
Do not use switches that are not sealed in dust-prone environments.
Doing so may cause dust to penetrate inside the switch and cause
contact failure. If a switch that is not sealed must be used in this kind
of environment, use a resin sheet as shown below or other measure
to protect it against dust.
3. Usage Environment
Before installing the switch, make sure that the area of installation is
not subject to corrosive gases emited from surrounding parts.
Do not use in areas subject to high temeratures, high humidity or
toxic gases such as sulfuric gas (H2S, SO2), ammonia gas (NH3),
nitric gas (HNO3), or chlorine gas (Cl2). It can cause corrosive dam-
age to the contacts and result in malfunction.
If there is silicon in the atmosphere, it may stop the contacts from
functioning properly. If silicon products such as silicon oil, silicon filler
or silicon wires are used in the surrounding area, install a contact
protection circuit to prevent arching or remove the silicon source.
The following situations may cause water to enter inside of the
Swtich, resulting in a malufunction due to contact failure or corrosion:
•Using the switch in an outdoor environment where it is
exposed to water drops for an extended period of time.
•Using the switch in an underwater setting where it is sub-
ject to strong water pressure.
Do not use switches that have been dripped. The mating section or
other internal parts may be damaged, resulting in malfunction.
■PCBs
The Switch is designed for a 1.6-mm thick, single-side PCB.
Using PCBs with a different thickness or using double-sided,
through-hole PCBs may result in loose mounting, improper insertion,
or poor heat resistance in soldering. These effects will occur,
depending on the type of holes and patterns of the PCB. Therefore, it
is recommended that a verification test is conducted before use.
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 PCB’s
become attached to the switch, contact failure may result.
Operatingpar
t
Plunger
IncorrectIncorrect Correct
Switch
Resin sheet

2Tactile Switches Technical Information
■Soldering
1. General Precautions
Before soldering the Switch on a multilayer PCB, test to confirm that solder-
ing 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 sol-
dering. An interval of five minutes is required between the first and
second soldering.
2. Automatic Soldering Baths
(B3F, B3W, B3WN, B3M, B3J)
Soldering temperature: 260°C max.
Soldering time: 5 s max. for a 1.6-mm thick single-side PCB
Preheating Temp: 100°C max. (ambient Temp.) within 60 s.
Make sure that no flux will rise above the level of the PCB. If flux
overflows onto the mounting surface of the PCB, it may enter the
Switch and cause a malfunction.
3. Reflow Soldering (Surface Mounting)
Solder the terminals within the heating curves shown in the following
diagram.
B3FS, B3SN, B3S
B3SL, B3U, B3AL
Note: The above heating curves apply 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 dam-
age the Switch’s push-button operation.
4. Manual Soldering (All Models)
Soldering temperature: 350°C 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
1. Washable and Non-washable Models
Standard Switches are not sealed, and 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.
2. Washing Methods
Washing equipment incorporating more than one washing bath can
be used to clean washable models, provided that the washable mod-
els are cleaned for one minute maximum per bath and the total
cleaning time does not exceed three minutes.
3. Washing Agents
Apply alcohol-based solvents to clean washable models. Do not
apply any other agents or water to clean any washable model, as
such agents may degrade the materials or performance of the
Switch.
4. Washing Precautions
Do not impose any external force on washable models while washing.
Do not clean washable models immediately after soldering. The
cleaning agent may be absorbed into the Switch through respiration
as the Switch cools. Wait for at least three minutes after soldering
before cleaning washable models.
Do not use Sealed Switches while submersed in water or in locations
exposed to water.
■Tape Packaging
1. Radial Types
The tape is packaged by fan-folding into the box, as shown in the
following diagram.
Do not apply any external force to the packaging box, or subject it to
vibration. Doing so may deform the Switch terminals.
Remove the tape slowly, making sure that the Switches are not
entangled or caught. Otherwise the terminals may be deformed.
Do not store the packaged Switches in locations subject to high tem-
peratures or high humidity. The packaging boxes are sealed with
paper tape and are not airtight. Storing the packaged Switches in
locations with high temperature or high humidity may result in deteri-
oration of the tape and Switches, and long-term storage under such
conditions may cause discoloration of the Switch terminals.
PCB surface
Flux surface
Temperature (°C)
220
180
Max. 250
150
Room
temperature
Preheating
Time (s)
60 to 120 Max. 60
Temperature (°C)
180
220
260 max.
150 Preheating Heating
Time (s)
60 to 120 60 max.
Washable (sealed types) B3W, B3WN, B3S, B3SN
Non-washable (Standard types) B3F, B3FS, B3SL, B3W-9, B3J, B3M,
B3U, B3AL
Model A B C
B3F 50 mm 325 mm 275 mm
B3WN 53 mm 326 mm 350 mm
Switches on taping
Packaging box
Fan-folded tape
B
A
C

Tactile Switches Technical Information 3
2. Packaging for Embossed Tape
B3FS-1000P, B3SN
Note: Switches with ground terminals are packaged with the ground
terminal on the opposite side of the guide hole.
B3FS-1010P
B3FS-1050P
B3SL-1002P / 1005P
B3SL-1022P / 1025P
Standards Conforms to JEITA.
Package 3,000 Switches
Heat resistance 50°C for 24 hours (without deformation)
Standards Conforms to JEITA.
Package 1,000 Switches
Heat resistance 60°C for 24 hours (without deformation)
380±2 dia.
13 dia.
Reel
Label Tape drawing direction
(18)
8±0.1
4±0.1
1.75±0.1
5.5
12±0.3
A
2
Tape drawing direction
1.5 dia.
+0.1
0
Model A
B3FS-1000P 3.9 mm
B3SN 3.6 mm
13 dia.
330 dia.
Reel
(Made of paper)
Label Tape drawing direction
(22)
4±0.1
2
16
7.5
1.75
12±0.1
Tape drawing direction
(4.7)
1.5 dia.
+0.1
0
Standards Conforms to JEITA.
Package 1,000 Switches
Heat resistance 60°C for 24 hours (without deformation)
Standards Conforms to JIS.
Package 2,000 Switches (B3SL-1002P / 1005P)
1,400 Switches (B3SL-1022P / 1025P)
Heat resistance 60°C for 24 hours (without deformation)
380±2 dia.
13 dia.
Reel (made of paper)
Label Tape drawing direction
(22)
4±0.1
2
16±0.3
7.5
1.75±0.1
12±0.1
Tape drawing direction
(8.1)
1.5 dia.
+0.1
0
4±0.1
2
16
7.5
1.75
12±0.1
1.5+0.1
0 dia.
Tape drawing direction
(3.7)
380±2
dia.
13 dia.
Reel (Material: PS)
Label
(22)
Tape drawing
direction
(5.3)
2
16
7.5
1.75
4±0.1
12±0.1
1.5+0.1
0 dia.
Tape drawing direction
380±2
dia.
13 dia.
Reel (Material: PS)
Label
(22)
Tape drawing
direction

4Tactile Switches Technical Information
B3S
Note: Switches with ground terminals are packaged with the ground
terminal on the opposite side of the guide hole.
B3U-1000 Series
B3U-3000 Series
B3AL Series
■LEDs (B3J)
Make sure that the polarity of the LEDs is correct. The polarity is not
indicated on the Switch, but the positive pole is located on the back
surface of the Switch on the side without the OMRON mark.
Connect limiting resistors to the LEDs. The Switch does not have
built-in limiting resistors, so satisfy the LED characteristics by obtain-
ing the limiting resistance according to the following formula based
on the voltage to be used.
■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.
Standards Conforms to JEITA.
Package 1,000 Switches
Heat resistance 50°C for 24 hours (without deformation)
Standards Conforms to JEITA.
Package 3,500 Switches (B3U-1000 Series)
4,000 Switches (B3U-3000 Series)
Heat resistance 50°C for 24 hours (without deformation)
Standards Conforms to JEITA.
Package 1,400 Switches
Heat resistance 50°C for 24 hours (without deformation)
13 dia.
330 dia.
Reel Label
Tape drawing direction
21.5
4.7
0.4
0.06
8.7 7
9.4
1.5
4±
0.1
2
1
6
7.5
1.75
12±
0.1
Tape drawing direction
1.5 dia.
+0.1
0
12±0.3
5.5
1.75±0.1
8+0.1
4+0.1 22.55
Tape drawing direction
1.5 dia.
+0.1
0
13 dia.
Reel Label
Tape drawing
direction
(19)
330±
2
dia.
5.5
2.2
2
12±
0.3
1.75±
0.1
8+
0.1
4+
0.1
Tape drawing direction
1.5 dia.
+0.1
0
13 dia.
Label
Tape drawing
direction
(19)
Reel
330 ±
2
dia.
(5.5)
1.5 dia.
+0.1
0
1.75
Tape drawing direction
4±0.1
C
C
Cross section
C-C
12±0.1
2
16
7.50
(22)
Reel
13 dia.
380±2 dia.
Tape drawing direction
Limiting resistance (R) = (Voltage used (E) – LED forward voltage (VF)) (Ω)
LED forward current (IF)
E
RVF
IF
Red
−20 0
50
40
30
20
10
0
20 40 60 8
0
Ambient temperature Ta (°C)
Forward current I
F
(mA)
Yellow/Green
Red
Yellow
Green
1.5 1.71.6
50
30
10
3
1
0.5
5
1.81.9 2.0 2.1
Forward voltage VF(V
)
Forward current IF(mA)

Tactile Switches Technical Information 5
MEMO

6Tactile Switches Technical Information
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USA - http://www.components.omron.com
Cat. No. A205-E-01 Printed in USA
OMRON ELECTRONIC
COMPONENTS LLC
847-882-2288
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can be found at http://www.components.omron.com/components/web/webfiles.nsf/sales_terms.html
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