SKRW
3.7mm Square Low-profile (Surface Mount Type)
Low-profile and compact size of 3.7×3.7×0.35mm
■
Typical Specifications
Items
Rating（max.）
Rating（min.）
Initial contact resistance
Travel（mm）
TACT Switch
TM
検
出
Specifications
50mA 12V DC
10μA 1V DC
Sharp
Feeling
100mΩ max.
0.15
Soft
Feeling
■
Product Line
Product No.
Operating force
1.57N
Top push
2.35N
50,000 cycles
Operating direction
Operating life
（5mA 5V DC）
500,000 cycles
Minimum order unit（pcs.）
Japan
10,000
Export
Snap-in
Type
SKRWAEE030
SKRWADE030
10,000
Surface
Mount Type
■
Packing Specifications
Taping
Number of packages（pcs.）
1 reel
10,000
Unit:mm
1 case / Japan 1 case / export packing
100,000
100,000
Tape width
（mm）
12
Export package
measurements（mm）
395×395×205
Reel size
Radial
Type
Note
For reels of 330mm diameter, please inquire.
■
Dimensions
Style
3.7
3.07
ø0.7 knob
operation range
Unit:mm
PC board land dimensions
（Viewed from switch mounting face）
1
3
3.7
3.15
2.35
2.1
2
0.35
4
2.5
3.7
■
Circuit Diagram
1
3
2
4
Refer to P.265 for soldering conditions.
211
3.4
TACT Switch
List of Varieties
TACT Switch
TM
Sharp
Feeling
Soft
Feeling
Snap-in
Type
Surface
Mount Type
Radial
Type
TM
Type
Series
Photo
Features
Water-proof
Dust-proof
IP standard
Top push
Side push
W
Dimensions
（mm）
D
H
1N max.
Sharp Feeling Type
Surface Mount
SKSH
SKRW
SKRM
SKRB
SKRR
SKQG
SKTC
SKSK
Low–profile
—
—
—
●
—
3.3
2.9
0.35
—
—
—
●
—
—
—
—
●
—
—
—
—
●
—
Low–profile
and long life
—
—
—
●
—
7.5
7
0.6
Low–profile
—
—
—
●
—
Double action
●
●
67 equivalency
●
—
3.4
2.2
0.62
—
—
—
●
—
3.5
3.2
0.6
Operating
direction
□3.7
□4.5
0.4
□4.8
0.55
□5.2
0.8/1.5
Operation
force
coverage
1N to 2N
2N to 3N
3N to 4N
4N to 5N
See the relevant pages for
respective product
descriptions
See the relevant pages for
respective product descriptions
—
−40℃ to +90℃
—
○
—
●
Travel（mm）
Ground terminal
Operating temperature range
Automotive use
Life Cycle
Rating（max.）
（Resistive load）
Electrical
performance
Rating（min.）
（Resistive load）
Insulation resistance
Voltage proof
Vibration
Durability
Lifetime
Cold
Environmental
performance
Dry heat
Damp heat
Page
210
—
0.15
—
—
0.15/0.2
—
−40℃ to ＋85℃
—
●
—
0.25
−30℃ to ＋85℃
—
—
−30℃ to ＋85℃
—
—
50mA 12V DC
10μA 1V DC
100MΩ min. 100V DC 1min.
100V AC 1min.
250V AC 1min.
100V AC 1min.
10 to 55 to 10Hz/min., the amplitude is 1.5mm for all the frequencies,
in the 3 direction of X, Y and Z for 2 hours respectively
Shall be in accordance with individual specifications.
−40℃ 96h
90℃ 96h
60℃, 90 to 95%RH 96h
21
1
212
213
214
215
217
218
W：Width. The most outer dimension excluding terminal portion.
D ：Depth. The most outer dimension excluding terminal portion.
H ：Height. The minimum dimension if there are variances.
TACT Switch
TM
Soldering Conditions ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 265
TACT Switch
TM
Cautions ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 266
1. The automotive operating temperature range to be individually discussed upon request.
2.
●
Indicates applicability to all products in the series, while
○
indicates applicability to some products in the series.
Notes
190
TACT Switch
TM
Soldering Conditions
■
Condition for Reflow
Available for Surface Mount Type.
1. Temperature measurement: Thermocouple φ 0.1 to 0.2 CA（K）or CC（T）at solder joints
（copper foil surface）
.
A heat resistive tape should be used to fix thermocouple.
2. Temperature profile
Temperature (˚C )
180
150
Time
Soft
Soft
Feeling
Feeling
TACT Switch
TM
検
出
260˚C max. 3 sec max.
230˚C
Sharp
Sharp
Feeling
Feeling
120 sec max.
（pre-heating）
3 to 4min.
Time inside soldering equipment
40s max.
Notes
1. The above temperature shall be measured of the top of switch. There are cases where the PC board's temperature greatly
differs from that of the switch, depending on the material, size, thickness of PC boards and others.
The above-stated conditions shall also apply to switch surface temperatures.
2. Soldering conditions differ depending on reflow soldering machines.
Prior verification of soldering condition is highly recommended.
Snap-in
Snap-in
Type
Type
Surface
Surface
Mount Type
Mount Type
■
Conditions for Auto-dip
Available for Snap-in Type and Radial Type.
Items
Flux built-up
Condition
Mounting surface should not be exposed to flux
■
Manual Soldering
Items
Soldering temperature
Duration of soldering
Capacity of soldering iron
Condition
350℃ max.
3s max.
60W max.
Radial
Radial
Type
Type
Preheating temperature
Ambient temperature of the soldered surface of PC board. 100℃ max.
Preheating time
Soldering temperature
Duration of immersion
Number of soldering
60s max.
260℃ max.
5s max.
2times max.
SKHH, SKHW, SKRG, SKPD Series
Items
Soldering temperature
Duration of soldering
Capacity of soldering iron
Condition
360℃ max.
3s max.
60W max.
SKHH, SKPD Series
Items
Flux built-up
Preheating temperature
Preheating time
Soldering temperature
Duration of immersion
Number of soldering
Condition
Mounting surface should not be exposed to flux
Ambient temperature of the soldered surface of PC board. 110℃ max.
60s max.
260℃ max.
5s max.
2times max.
SKTD, SKTG, SKQJ, SKQK, SKEG Series
Items
Soldering temperature
Duration of soldering
Capacity of soldering iron
Condition
350℃ max.
3s max.
20W max.
SKQJ, SKQK, SKEG Series
Items
Flux built-up
Preheating temperature
Preheating time
Soldering temperature
Duration of immersion
Number of soldering
Condition
Mounting surface should not be exposed to flux
Ambient temperature of the soldered surface of PC board. 100℃ max.
45s max.
255℃ max.
5s max.
2times max.
Notes
1.
2.
3.
4.
Prevent flux penetration from the top side of the TACT Switch
TM
.
Switch terminals and a PC board should not be coated with flux prior to soldering.
The second soldering should be done after the switch is stable with normal temperature.
Use the flux with a specific gravity of min 0.81.
（EC-19S-8 by TAMURA Corporation, or equivalents.）
265
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