Omron B3WN User manual

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Mechanical Key Switch B3WN
Double-sealing Construction Assures
Water-tight/Dust-tight Protection
8 x 8 mm compact size
Allows the use of radial-taping part
insertion machines
Conforms to IEC529 IP67
Ordering Information
Size Height x pitch Operating force (OF) Part Number
8x8mm 13 x 5 mm 200 gf B3WN-6002
Note: Orders must be made in units of 1,000 pieces.
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CONSTRUCTION
Pushbutton
Case
Rubber seal
Film
Plunger
Disc spring
Base
Terminal

B3WN
B3WN
Characteristics
Switching capacity 50 mA, 12 VDC (resistive load)
Insulation voltage 30 VDC
Contact configuration SPST-NO
Contact material Silver plating
Contact resistance 100 mΩmax. (initial value) (rated: 1 mA, 5 VDC)
Insulation resistance 100 MΩmin. (at 100 VDC)
Dielectric strength 250 VAC, 50/60Hz for 1 min
Bounce time 10 ms max.
Vibration resistance Malfunction: 10 to 55 Hz, 1.5-mm double amplitude
Shock resistance Destruction: 784 m/s2min. {approx. 80G min.}
Malfunction: 100 m/s2min. {approx. 10G min.}
Life expectancy 100,000 operations min.
Ambient temperature Operating -- 25°Cto85
°C(--13 °F to 185°F) with no icing
Ambient humidity Operating 35% to 85%
Weight Approx. 0.7 g
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CHARACTERISTIC DATA
Stroke S (mm)
Operating force (gf)
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OPERATING CHARACTERISTICS
B3WN-6002
Operating force (OF) 200±70 gf
Releasing force (RF) 50 gf min.
Pretravel (PT) 0.3 mm
+0.2
-- 0.1

B3WN B3WN
Dimensions
Unit: mm (inch)
Fixed tape
Master tape
Recommended mounting
holes and internal connection
(PCB thickness t=1.6 mm)
3.8
(0.15) dia.
4±0.3 dia.
(0.16±0.01 dia.)
B3WN-6002
PCB Pad
(Top View)
(One-side PCB t=1.6)
Terminal Arrangement/
Internal Connection
(Top View)
Two, 1+0.1
0dia.
8±0.2
(0.31±0.008)
13±0.2
(0.51±0.008)
8±0.2
(0.31±0.008)
9
(0.35)
5±0.1
(0.20±0.004)
5±0.2
(0.20±0.008)
0.6
(0.02)
0.9
(0.04)
0.3
(0.01) 0.2 (0.008)
max.
0.2
(0.008)
max.
0.9
(0.04)
0.6
(0.02)
12.7±1.0
(0.50±0.04)
6.35±1.0
(0.25±0.04)
3.85±0.5
(0.15±0.02)
12.7±0.3
(0.50±0.01) 12.7±0.3 (0.50±0.01)
0.5
(0.02)
max.
18+1
(0.71+0.04 )
0
018+1
(0.71+0.04 )
-- 0 .5
--0.02
Note: 1. In accordance with EIAJ RC-1008, unless otherwise specified.
2. Switch fixing direction (A and B) on the tape may change.
Precautions
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OPERATION
Do not repeatedly operate the Switch with high force, apply
additional force to the pushbutton once it has stopped moving, or
operate the Switch with excessive force, otherwise the disc
spring of the Switch may deform and the Switch may malfunction.
Be sure to set the Switch so that the pushbutton will be pressed
straight. A decrease in the life of the Switch may result if the
pushbutton is pressed off-center or from an acute angle.
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PCB
The Switch is designed for a 1.6-mm-thick, single-sided PCB as
a standard PCB. The Switch may not be mounted to any other
type of PCB, such as a double-sided, through-hole PCB, or any
other one that is different in thickness. Furthermore, the Switch
may not operate properly or withstand the soldering heat if it is
mounted to such a PCB. Be sure to test the PCB before use.
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SOLDERING
The Switch can be soldered automatically or manually.
The automatic soldering of the Switch on a 1.6-mm-thick,
single-sided PCB must be completed within five seconds at a
soldering temperature of 260°C maximum.
The manual soldering of the Switch on a 1.6-mm-thick,
single-sided PCB must be completed within three seconds at a
soldering iron tip temperature of 350°C maximum.
When using a multi-layer PCB, test the PCB in advance because
the Switch mounted to the PCB may be deformed by heat if the
pattern or land design is improper.
Soldering may be repeated only once at a minimum interval of
five minutes if the Switch is not soldered properly.
Make sure that no flux will rise on the mounting surface of the PCB.

B3WN
B3WN
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PACKAGE
B3WN Switches are packed on tape as shown below.
B3WN Switches on tape
Package
Stored zigzag
350
53 326
Do not press strongly, vibrate, or drop the package, otherwise the
terminals of the Switches may deform.
Pull out the tape slowly. Make sure that the tape is not entangled
while pulling it out, otherwise the terminals of the Switches may
deform.
Do not store the package in locations with high temperature or
high humidity. Use the Switches as soon as possible. The
package made of paper is not tightly sealed. Storing the package
in locations with high temperature or high humidity for a long time
may result in the discoloration of the Switch terminals.
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OTHER PRECAUTIONS
When using the Switch in a very humid environment or where
condensation may occur: mount switch first, then completely
cover the terminals with coating in order to prevent current
leakage from terminals.
Do not use coating materials that contain toluene or xylene.
Cat. No. A112-E3-1 12/98 Specifications subject to change without notice. Printed in U.S.A.
OMRON ELECTRONICS, INC.
OneEastCommerceDrive
Schaumburg, IL 60173
NOTE: DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters to inches divide by 25.4.
1-800-55-OMRON
OMRON CANADA, INC.
885 Milner Avenue
Scarborough, Ontario M1B 5V
8
416-286-6465
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