SPECIFICATIONS CONTACT RATING: Dependent upon contact material See Page 138. MECHANICAL LIFE: 50,000 make-and-break cycles. CONTACT RESISTANCE: 20 mȟġmax. initial @ 2-4VDC 100mA for both silver and gold plated contacts. INSULATION RESISTANCE: 1,000 Mȟġmin. DIELECTRIC STRENGTH: 1,000 Vrms min.@sea level. OPERATING TEMPERATURE: -30°C to 85°C. MATERIALS 8B Sealed Sub-Miniature Pushbutton Switches(SMT) CASE & BUSHING: Glass filled nylon 6/6,flame retardant, heat srabilized (UL94v-0). PLUNGER: Thermoplastic Polyester (UL 94V-0), with intenal O-ring seal. SWITCH SUPPORT: Brass,tin plated. CONTACT / TERMINALS: Silver or gold plated copper alloy. (See Page 138) 136 HOW TO ORDER MODEL NO. TERMINATIONS CONTACT MATERIAL SEAL RoHS SOLDERING E Model NO. 8BS8 On-Mom. 8BS9 Off-Mom. We have invented the rules www.dailywell.com.tw Terminations MT (STD) Right angle, surface mount. MZ (STD) Contact material Q Silver R Gold C Gold over silver Seal E EPOXY (std) RoHS soldering Rohs Compliant S Rohs & Lead Free F Halogen Free+RoHS 8B Series Sealed Sub-Miniature Pushbutton Switches(SMT) SWITCH FUNCTION CONNECTED TERMINALS / SCHEMATIC SWITCH FUNCTION NO. POLES UL/CSA MODEL NO. MODEL NO. POS.1 POS.2 SP Q28B18 8BS8 ON MOM Q28B19 8BS9 OFF MOM POS.1 POS.2 2 (COMM) 2-1 NC 1 3 NO 2-3 1-3 OPEN 2 (COMM) NC 1 3 NO 1 3 MOM=MOMENTARY POLE OPTIONS MT .244 6.20 Ø.100 Ø2.54 .410 10.41 MAX. .067 1.70 .030 0.76 .283 7.20 .325 8.23 .020 0.51 .096 2.45 1 2 .343 8.70 .070 1.78 3 .200 5.08 8B EPOXY SEAL .124 3.15 .150 3.81 .040 1.02 2 3 .233 5.90 1 .320 8.13 .140 3.56 .080 2.03 .020 0.51 .128 3.25 .040 1.02 Pushbutton Switches P.C. MOUNTING 1.71 4.35 SPDT Part No. Shown : 8BS8MTRE MZ P.C. MOUNTING .160 4.06 .233 5.90 .320 8.13 .234 5.94 .325 8.23 1 2 Ø.100 Ø2.54 SPDT EPOXY SEAL .121 3.08 .400 10.16 .272 6.90 .071 1.80 .059 1.50 3 .200 5.08 .276 7.00 .020 0.51 .313 7.95 1 2 3 .031 0.80 .079 2.00 .100 2.54 .200 5.08 Part No. Shown : 8BS8MZRE MT P.C. MOUNTING .244 6.20 .410 10.41 MAX. Ø.100 Ø2.54 .067 1.70 .283 7.20 EPOXY SEAL .124 3.15 .030 0.76 .343 8.70 .325 8.23 .020 0.51 .096 2.45 1 .070 1.78 3 .150 3.81 .040 1.02 2 3 1.71 4.35 .220 5.60 1 .320 8.13 .200 5.08 .140 3.56 .040 1.02 .080 2.03 .128 3.25 SPST Part No. Shown : 8BS9MTRE We have invented the rules www.dailywell.com.tw 137 MZ P.C. MOUNTING .160 4.06 .220 5.60 .320 8.13 EPOXY SEAL .121 3.08 .234 5.94 .272 6.90 .325 8.23 1 3 Ø.100 Ø2.54 .400 10.16 .059 1.50 .313 7.95 .071 1.80 .200 5.08 .051 1.30 .079 2.00 .276 7.00 .200 5.08 .032 0.80 SPST Part No. Shown : 8BS9MZRE 8B Sealed Sub-Miniature Pushbutton Switches(SMT) PACKAGING Switches available on embossed antistatic tape and reels. Tape and cover strip are conductive for use near statically sensitive components. 1.238 31.44 .087 2.20 .795 20.20 12.992 330.00 1.476 37.50 SCALE: 10 : 1 .079 2.00 .630 16.00 .157 4.00 Ø.061 Ø1.55 DIA. .630 16.00 1.260 32.00 .873 22.18 ELONGATED SPROCKET HOLES .260 6.60 .068 1.75 1.118 28.40 .350 8.90 REEL INFORMATION SCALE: 1 : 1 138 We have invented the rules www.dailywell.com.tw QUANTITY PER REEL 500 / pcs 8B Series Sealed Sub-Miniature Pushbutton Switches(SMT) CONTACT MATERIAL OPTIONS CONTACT PLATING Q C R Silver Gold over Silver Gold TERMINAL PLATING RATINGS Q = Gold flash over silver 3 Amps with resistant load @ 120VAC or 28VDC C = Gold over silver 1 Amps with resistant load @ 250VAC R = Gold 0.4 Volt - Amps ( VA ) max. @ 20V max. ( AC or DC ) 8B MANUAL SOLDERING: Use soldering iron of 30 watts, controlled at 350°C approximately 5 seconds while applying solder. WAVE SOLDERING: Recommended Soldering Temperature: 260 ± 5°C Duration of Solder Immersion: Max 5 sec. (PCB is 1.6mm in thickness) SOLDERING: Vapor phase & IR-reflow soldering can be applied. Pushbutton Switches SOLDERING PROCESSES Temperature Profile Zone Room Temperature Time (Sec) Pre-heat (A) 150°C Min 120s Soak (B) 180°C ~ 200°C Min 150s Peak (C) 200°C ~ 235°C Min 30s Peak (D) 235°C ~ 260°C Min 40s Peak (E) 260°C Max 5s Peak : 260°C (°C) 250 200 150 100 50 A B C D E Room Temperature Time (Sec) We have invented the rules www.dailywell.com.tw 139