STSS Datasheet, PDF (1/2 Pages) Bourns Electronic Solutions – SMD 4 mm Sealed Tact Switch

*RoHS ^COMPLIANT
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*
Model STSS is currently available,
although not recommended for new
designs.
■ Insert molding in the contact with special
treatment prevents flux buildup during
soldering and permits autodipping
STSS SMD 4 mm Sealed Tact Switch
Electrical Characteristics
Electrical Life
..........................................100,000 cycles
Rating ..................................DC 12 V 50 mA
Contact Resistance ......100 milliohms max.
Insulation Resistance
..................100 megohms, DC 100 V min.
Dielectric Strength ....100 V AC for 1 minute
Contact Arrangement ........1 pole 1 position
Environmental Characteristics
Operation Force........................220 g ±65 g
Stroke
................................0.2 + 0.10/- 0.05 mm
Operating Temperature ....-25 °C to +70 °C
Storage Temperature ........-30 °C to +80 °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
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
Physical Characteristics
Cover Materials
..........................................Stainless Steel
Base Materials
........LCP high temp. thermoplastic, white
Actuator Materials
........LCP high temp. thermoplastic, black
Contact Disc Materials
....................Stainless with silver cladding
Terminal Materials
............................Brass with silver plated
Tape ..................................................Teflon
Hand Soldering Process
..............Use a soldering iron of 30 watts,
controlled at 320 °C (608 °F)
for approximately 2 seconds while
applying solder
Reflow Soldering Process
..............When applying reflow soldering,
the peak temperature or the reflow oven
should be set to 240 °C
Packaging ..................3,500 pieces per reel
Product Dimensions
4.80 +0.20/-0.30
(.189 +.008/-.012
3.90 ± 0.10
(.154 ± .004)
3.55
(1.40)
1.40 ± 0.10
(.055 ± .004)
2.90 ± 0.10
(.114 ± .004)
1.50 +0.15/-0.10
(.059 +.006/-.004)
2.10
(.083)
1.20
(.047)
1.70
(.067)
1.00
(.039)
0.06
(.002)
0.10
(.004)
0.50
(.020)
0.80 ± 0.10
(.03 ± .004)
0.65 +0/-0.10
(.026 +0/-.004)
DIA.
1.80 ± 0.10
(.071 ± .004)
Recommended PCB Layout
3.60
(.142)
4.60
(.181)
2.60
(.102)
2.40 1.80
(.094) (.071)
1.70
(.067)
0.80 +0.10/-0
(.028 +.004/0)
DIA. 2 PLCS.
3.20
(.126)
5.00
(.197)
DIMENSIONS ARE:
MM
(INCHES)
*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.
How to Order
STSS - 32 - TR
Model
Terminal
Embossed Tape
TR = 3500 Pcs./180 mm Reel
Circuit Diagram
1
2
Reflow Soldering Profile
275
240 °C
225
175
125 _{120 °C}
10-15
Sec.
80-90 Sec.
180 °C
75
35-60
30-40 Sec.
Sec.
25
0 20 40 60 80 100 120 140 160 180 200
Time (Seconds)