*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.
STJN-4 SMD Super-Thin Tact Switch
Features
Super-thin 4.5 mm square SMD
Two different operating forces
0.55 mm height without knob
Compatible with surface mount reflow
soldering processes
RoHS compliant*
Electrical Characteristics
Max. Power Rating 12 VDC max., 20 mA
Contact Resistance
...............................100 milliohms max.
Insulation Resistance
................50 megohms min., 100 VDC
Dielectric Strength
...........................AC 100 V for 1 minute
Bounce
On .........................................3 ms max.
Off .......................................10 ms max.
Circuit ....................................N.O. SPST
Mechanical Characteristics
Mechanical Life .........50,000 cycles min.
Actuation Force
..................160 gf 50 gf (1.6 N 0.5 N)
.................240 gf 60 gf (2.4 N 0.6 N)
Stroke ..........................0.2 mm 0.1 mm
General Characteristics
Switch Type .........................(N.O.) SPST
Operating Temperature Range
....................................-20 C to +70 C
Storage Temperature Range
....................................-40 C to +85 C
Product Dimensions
Recommended PCB Layout
Circuit Diagram
2
4
1
3
0.6
(.024)
2.8
(.110)
4.3
(.169)
4.50 + 0.25 / - 0.15
(.177 + .010 / - 0.06)
4.3
(.169)
2.6
(.102)
4.5
(.177)
0.35
(.014)
0.45 + 0.15 / -0.10
(.018 + .006 / - .004)
0.55 + 0.15 / - 0.10
(.022 + .006 / - .004)
3.7
(.146)
1
2
3
4
3.0
(.118)
4.8
(.189)
2.85
(.112)
4.85
(.191)
1
2
3
4
How to Order
STJ N - 4 05 - N TR
Model
Thin SMD Tact Switch
Product Code
N = Non-washable
Size
4 = 4.5 mm
Height
05 = 0.55 mm (without knob)
Actuating Force
N = 160 gf (1.6 N)
P = 240 gf (2.4 N)
Packaging
TR = Embossed Tape
10,000 pcs./reel
Reflow Soldering Profile
T
e
mperature (
C)
Time (Seconds)
275
30-40 Sec.
120 C
225
175
125
75
25
0
20
40
60
80
100 120 140 160 180 200
80-90 Sec.
10-15
Sec.
35-60
Sec.
180 C
240 C
REV. 02/06
DIMENSIONS:
MM
(IN)
*RoHS COMPLIANT
Model STJN-4 is currently available,
although not recommended for new
designs.
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