new product news 1 smd tactile switch b3fs-4 surface-mounting switches with 12 x 12 mm size ? surface-mounting device of b3f-4 series. ? distinctive snapping action and extended mechanical/electrical durability. ? available in embossed taping packages fo r automatic mounting. ordering information list of models note: order in multiples of the minimum order unit. switches are not sold individually. specifications ratings/characteristics operating characteristics dimensions note: 1. all units are in millimeters unless otherwise indicate d. unless otherwise spec ified, a tolerance of ? 0.4 mm applies to all dimensions. note: 2. the numbers used for terminals in the following graphics are indicated in the ?bottom view? diagram in the right. in this diagr am, the switch is rotated so that the terminals are on the right and left-hand sides, and the omron logo appears the right way up. rohs compliant ty p e plunger type height operating force (of) plunger color embossed taping model quantity per package 12 x 12 mm B3FS-4002P 4.3 mm 1.47 n black B3FS-4002P 1,000 switching capacity 1 to 50 ma, 5 to 24 vdc (resistive load) ambient operating temperature -25 to +70 degc at 60%rh max. (with no icing or condensation) ambient operating humidity 35 to 85%rh (at +5 to +35 degc) contact configuration spst-no contact resistance 100 m ? max. (initial value) (rated: 1 ma, 5 vdc) insulation resistance 100 m ? (at 250 vdc) dielectric strength 500 vac 50/60hz for 1min vibration resistance malfunction: 10 to 55 hz, 1.5-mm double amplitude shock resistance destruction: 1,000 m/s 2 {approx. 100 g} max. malfunction: 100 m/s 2 {approx. 10 g} max. durability 3,000,000 operations min. weight approx. 1 g model item B3FS-4002P operating force (of) 1.47 ? 0.49n {150 ? 50 gf} releasing force (rf) 0.15 n {15 gf} min. pretravel (pt) 0.25 ? 0.15 mm 12 0.2 15 1 1 5 0.2 12 0.2 4.3 0.2 max0.4 0.1 ?7.1 4 2 3 1 16.6 0.1 12 0.1 2.6 0.1 7.4 0.1 B3FS-4002P pcb pad (example) (top view) terminal arrangement/ internal connection (top view) 2 4 1 3 (bottom v ie w )
2 b3fs-4 smd tactile switch precautions be sure to read the safety precautions common to all tactile switches for correct use. pcbs if the pcbs are separated after mounting the switch, particles from the pcbs may enter the switch. if pcb particles or foreign particles from the surrounding environment, workbench, contain- ers, or stacked pcbs become attached to the switch, contact failure may result. soldering 1. general precautions before soldering the switch on a multilayer pcb, test to confirm that soldering can be performed properly. otherwise the switch may be deformed by the soldering heat on the pattern or lands of the multilayer pcb. do not solder the switch more than twice, including rectification soldering. an interval of five minutes is required between the first and the second soldering, or it may result in melting housing and deterioration of operating characteristics. 2.reflow soldering (surface mounting) solder the terminals within the heating curve shown in the follow- ing diagram. note: the above heating curve applies if the pcb thickness is 1.6 mm. the peak temperature may vary depending on the reflow bath used. confirm the conditions beforehand. do not use an automatic soldering bath for surface-mounted switches. the soldering gas or flux may enter the switch and damage the switch's plunger operation. 3. manual soldering soldering temperature: 350 degc max. at the tip of the soldering iron soldering time: 3 s max. for a 1.6-mm thick, single-side pcb before soldering the switch on a pcb, make sure that there is no unnecessary space between the switch and the pcb. washing this switch cannot be washed. doing so will cause the washing agent, together with flux or dust particles on the pcb, to enter the switch, resulting in malfunc- tion. packaging specifications for embossed taping rohs compliant the ?rohs compliant? designation indicates that the listed mod- els do not contain the six hazardous substances covered by the rohs directive. reference: the following standards are used to determine compliance for the six substances. lead: 1,000 ppm max. mercury: 1,000 ppm max. cadmium: 100 ppm max. hexavalent chromium: 1,000 ppm max. pbb: 1,000 ppm max. pbde: 1,000 ppm max. precautions for correct use tempert u re (c) 1 8 0 220 250 max. room tempert u re 150 preheating heating time (s) 60 to 120 max.60 ?13.2 ?3 8 0 2 16 0.1 reel (material: ps) la b el tape dra w ing direction tape dra w ing direction (29) 4 0.1 (5.6) 2 a 24 11.5 1.75 ?1.5 +0.1 0 a all dimensions shown are in millimeters. to convert millimeters into inches, multiply by 0.03 937. to convert grams into ounces, multiply by 0.03527.
|
