The SDT Series is currently available,
although not recommended for new
designs.
Features
■ Available sharp click feel with a positive
tactile feedback
■ Ultra-miniature and lightweight structure
suitable for high density mounting
■ Economical with high reliability
■ RoHS compliant*
■ Insert molding in the contact with special
treatment prevents flux buildup during
soldering and permits autodipping
SDT Series Tact Switch
Electrical Characteristics
Product Dimensions
Electrical Life
SDTX-610/620/630/650/660
SDTG-610/620/630/650/660
..................500,000 cycles min. for 260 g
1,000,000 cycles min. for 100 g, 160 g
Rating ..................................DC 12 V 50 mA
Contact Resistance ......100 milliohms max.
Insulation Resistance
6.0
(.236ꢀ
6.0
(.236ꢀ
4.30
(.169ꢀ
4.30
(.169ꢀ
C
L
C
L
T
T
3
T
T
2
4
1
..................100 megohms, DC 500 V min.
Dielectric Strength....250 V AC for 1 minute
Contact Arrangement........1 pole 1 position
4.50 0.20
(.177 .00ꢁꢀ
4.50 0.20
(.177 .00ꢁꢀ
C
C
L
L
T
T
T
4
T
2
3
1
Environmental Characteristics
0.50
(.020ꢀ
T
5
MAX.
3.50
(.13ꢁꢀ
DIA.
Operation Force ......................260 g 50 g,
160 g 50 g, 100 g 50 g
Stop Strength............Place the switch such
that vertical, a static load of 3 kg shall
be applied in the direction of actuator
operation for a period of 15 sec.
Stroke
6mm type ..................0.25 + 0.2/- 0.1 mm
12mm type ........................0.35 0.1 mm
Temperature Range ..........-20 °C to +70 °C
Vibration Test........................Mil-STD-202F,
Method 201A
Frequency ..............10-55-10 Hz/1 minute
Directions ................X,Y,Z, three mutually
perpendicular directions
Time......................2 hours each direction.
High reliability
Shock Test ..........................MIL-STD-202F,
Method 213B, Condition A
Gravity ..........50 G (peak value), 11 msec
Direction & Times....................6 sides and
3 times in each direction.
1.50
(.059ꢀ
3.50
(.13ꢁꢀ
C
L
0.40
(.016ꢀ
MAX.
DIA.
H
0.20
C
L
(H .00ꢁꢀ
H
0.20
3.50
0.30
(.012ꢀ
(H .00ꢁꢀ
(.13ꢁꢀ
3.60
1.ꢁ0
(.071ꢀ
6.50 0.50
(.256 .020ꢀ
7.90 0.50
(.311 .020ꢀ
0.30
(.012ꢀ
3.50 0.50
(.142ꢀ
3.50 0.50
(.13ꢁ .020ꢀ
0.70
(.02ꢁꢀ
1.ꢁ0
(.071ꢀ
(.13ꢁ .020ꢀ
6.50 0.50
(.256 .020ꢀ
7.90 0.50
SDTX-644/648
SDTX-644
MM/(INꢀ
2.4 +.1/-0
(.094 + .004/-0ꢀ
1.6 + .1/-0
(.063 + .004/-0ꢀ
A
B
DIM.
A
SDTG-644/648
SDTG-644
MM/(INꢀ
C
L
A
B
DIM.
A
C
L
2.4 +.1/-0
B
4.10
(.161ꢀ
(.094 + .004/-0ꢀ
SDTX-64ꢁ
1.6 + .1/-0
B
(.063 + .004/-0ꢀ
DIM.
A
MM/(INꢀ
High reliability
SDTG-64ꢁ
2.ꢁ +.1/-0
(.110 + .004/-0ꢀ
2.0 + .1/-0
(.079 + .004/-0ꢀ
DIM.
A
MM/(INꢀ
2.ꢁ +.1/-0
Physical Characteristics
B
Cover Materials
(.110 + .004/-0ꢀ
..........................................................Steel
Base Materials ......UL94V-0 PBT plus glass
fiber reinforced
Cover/Base Color................................Black
Actuator Materials ................Dulacon POM
plus glass fiber reinforced
Actuator Color ................Black, brown, red
Contact Disc Materials ....Phosphor bronze
with silver cladding
0.70
(.02ꢁꢀ
15°
2.0 + .1/-0
B
(.079 + .004/-0ꢀ
0.70
(.02ꢁꢀ
15°
RECOMMENDED PCB LAYOUT
6.5 ± 0.1
(.256 ± .004ꢀ
4.5 ± 0.1
(.177 ± .004ꢀ
CIRCUIT DIAGRAM
T
T
3
4
T
T
1
Terminal Materials
2
..........................Brass with silver cladding
Hand Soldering Process
..............350 °C 10 °C / 5 seconds max.
Wave Soldering Process
....................Preheat 100 °C / 60 seconds
260 °C 5 °C / 5 seconds
Packaging ..................1,000 pieces per bag
1.0 ± 0.05
(.039 ± .002ꢀ
4 PLCS.
DIA
T
5
CIRCUIT DIAGRAM
RECOMMENDED PCB LAYOUT
T
T
2
1
6.5 ± 0.1
(.256 ± .004ꢀ
4.5 ± 0.1
(.177 ± .004ꢀ
T
T
4
3
MM
(INꢀ
1.0 ± 0.05
(.039 ± .002ꢀ
5 PLCS.
DIMENSIONS:
DIA
4.1 ± 0.1
(.161 ± .004ꢀ
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.