NT IA ■ *R oH S CO M PL 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 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 How to Order Product Dimensions STSS - 32 - TR 4.80 +0.20/-0.30 (.189 +.008/-.012 Model 3.90 ± 0.10 (.154 ± .004) Terminal Embossed Tape TR = 3500 Pcs./180 mm Reel 3.55 (1.40) 2.10 (.083) Circuit Diagram 1.20 (.047) 1.70 (.067) 1.40 ± 0.10 (.055 ± .004) 2.90 ± 0.10 (.114 ± .004) 1 2 Reflow Soldering Profile 1.50 +0.15/-0.10 (.059 +.006/-.004) 1.00 (.039) 275 240 °C 225 0.65 +0/-0.10 (.026 +0/-.004) DIA. 0.06 0.50 (.002) (.020) 0.10 (.004) Temperature (°C) 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 10-15 Sec. 80-90 Sec. 125 120 °C 75 30-40 Sec. 25 0.80 ± 0.10 (.03 ± .004) 1.80 ± 0.10 (.071 ± .004) Recommended PCB Layout 4.60 (.181) 3.60 (.142) 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: *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. 180 °C 175 MM (INCHES) 0 20 40 60 35-60 Sec. 80 100 120 140 160 180 200 Time (Seconds) STSS SMD 4 mm Sealed Tact Switch Packaging Dimensions 8.00 (.315) 4.00 (.158) 2.00 (.079) 1.50 +0.10/-0 DIA. (.059 ± .004) 2.40 (.094) 1.75 (.069) 0.35 ± 0.05 (.014 ± .002) 3° 5.50 ± 0.1 (.217 ± .004) 4.20 5.20 (.165) (.205) 12.0 ± 0.30 (.472 ± .012) 4.00 (.158) DIA. 2.50 (.098) 0.5 (.020) 1.80 (.071) 2.40 (.094) Reliable Electronic Solutions Asia-Pacific: TEL +886-2 25624117 FAX +886-2 25624116 Europe: TEL +41-41 7685555 FAX +41-41 7685510 The Americas: TEL +1-951 781-5500 FAX +1-951 781-5700 www.bourns.com 02/06 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.