NT IA PL ■ ■ *R oH S CO M 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 Model STJN-4 is currently available, although not recommended for new designs. RoHS compliant* STJN-4 SMD Super-Thin Tact Switch 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 STJ N - 4 05 - N TR 4.50 + 0.25 / - 0.15 (.177 + .010 / - 0.06) Model Thin SMD Tact Switch 4.3 (.169) Product Code N = Non-washable 2.8 (.110) 0.6 (.024) Size 4 = 4.5 mm 1 2 Height 05 = 0.55 mm (without knob) Actuating Force N = 160 gf (1.6 N) P = 240 gf (2.4 N) 2.6 4.5 (.177) (.102) 4.3 (.169) Packaging TR = Embossed Tape 10,000 pcs./reel 0.55 + 0.15 / - 0.10 (.022 + .006 / - .004) 275 240 °C Temperature (°C) 225 0.45 + 0.15 / -0.10 (.018 + .006 / - .004) 0.35 (.014) 180 °C 175 10-15 Sec. 80-90 Sec. 125 120 °C 75 0 20 40 60 3.7 (.146) 35-60 Sec. 30-40 Sec. 25 4 3 Reflow Soldering Profile 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 How to Order 80 100 120 140 160 180 200 Time (Seconds) DIMENSIONS: MM (IN) Recommended PCB Layout 4.8 (.189) 3.0 (.118) 1 2 2.85 4.85 (.112) (.191) 3 4 Circuit Diagram REV. 02/06 *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. 1 2 3 4