fo 2i-O8 MEC CITEC POTENTIOMETERS INDUCTORS, SMDs SWITCHES, NETWORKS ENCODERS POWER COMPONENTS Economy Trimmers TYPE 3140 SERIES A range of tiny single turn trimmers suited to reflow soldering and attractively priced for volume application. Alternative layouts in two and three terminal versions and low profile models (2.2mm) make this a very versatile product. All product is supplied on 12 mm tape and reeled on 178 mm diameter reels. MEC CITEC KEY FEATURES @ STABLE CERMET ELEMENT @ 0.15 W POWER RATING @ PACKED IN 12mm STANDARD TAPE W@W ATTRACTIVELY PRICED @ SUITED TO AUTOMATIC PLACEMENT @ RANGE OF TERMINAL LAYOUTS @ TEMP RANGE -25C TO +85C @ GOOD VACUUM PICK UP ON HEAD MESOITE PIFER D SbE Mt 6424700 0000913 &43 SPECIFICATION ELECTRICAL Resistance Range: 100R to 1M Resistance Tolerance: + 25% Power Rating: 0.15%W @ 70C derating to zero at 85C Max. Input Voltage: 50 vdc or ac RMS max Max. Wiper Current: 50mA Electrical Angle, Nominal: 270 + 10 End Resistance, Max: 5% Contact Resistance Variation: 5% max Operating Temperature: -25C to + 85C Temp. Coefficient, of Resistance: + 250 ppm/C Insulation Resistance, Min: 100 M Q (DC 250V) DERATING CURVE = . Nat S 2 100 gS 5 . When the ambient temperature exceeds 70C, reduce o . . . og the rated power and current in accordance with the 2. derating curve given. t 70C 85C amb. Temperature C MECHANICAL Mechanical Angle: Continuous Operating Torque, Max: 2.0-24.5 mNm Solder Strength Min: 300 gF cm (3 directions) ENVIRONMENTAL Humidity Exposure: Res. Change : + 3% High Temperature Exposure: Res. Change : + 3% Humidity Load Life: Res. Change : + 3% Load Life: Res. Change : + 3% Temperature Cycle: Res. Change : + 3% Effect of Soldering: Res. Change : + 10% (10 cycle) ALTERNATIVE STYLES D S6E MM 6424700 0000914 779 DIMENSIONS 3142 All dimensions are nominal and wo, . in mm unless otherwise stated. . hataa tor Do not scale. Ne J -| Band 008 018) | oye Oy, 2 (ny | fen (0) = Le (60) PACKAGING (TAPE) vo meee TA is o mee : S : 2.4 IEC 286 PT3 20+ Ol 42: 8.0+0.! oF 4040.1 Sist yg 03 A R 43 : A-A cross section A Direction of feed N.B. Orientation Terminals 1 & 3 nearest sprocket holes Unless otherwise specified: + 0.3 PACKAGING (REEL) Reel Qty w2 . 800 pes 18.0 7 3 wi 413.5 SUBSTRATE LAYOUT 44 24 3141/3142 3140 Solder Resist >A APOoes fee > . ony ys V + J nN ey | Rs 1 eo : 7 EP: lei Land rt wi 4) KA; bY )y4 ATH i : AOA 2 10: bS Gb 08 08 [08 fap $=} bee, 05 05 HOW TO ORDER 3142 x 502 P COMMON PART ORIENTATION RESISTANCE VALUE TOLERANCE 3140 - 3 Terminals X = Terminals 1 and 3 The first digits are Example in line away from sprocket holes significant figures of 1k: 102 3141- 2 Terminals resistance value and 5k: 502 P = +25% . W = Terminals 1 and 3 the third one denotes the 100k : 104 3142 a fem inals towards sprocket holes number of zeroes following. D SbE MM 6424700 OOCOdLS bOS APPLICATION NOTES SOLDERING If soldering is repeated, please note that the allowance time is the accumulated time. CONDITIONS Solder : Co-crystalized solder Flux =: Rosin Flux ; REFLOW SOLDERING- NO PREHEAT 270 g E Fe REFLOW SOLDERING 10 20 30 Time (Sec.) Pre-Heating {in air) | Soldering Gradual Cooling RECOMMENDED o 230 C z 5 a One minute min | 20 sec. max SOLDERING The following conditions must be strictly obeyed when using a soldering iron. WITH IRON Soldering Iron : 20W maximum Tip temperature -: 280C maximum Soldering time : 5 seconds maximum = CLEANING After soldering, use cleaning solvents such as chlorosen or dyefreon. CONDITIONS CAUTION ON The following conditions must be strictly obeyed when using a soldering iron for rework: SOLDERING Soldering iron : 20W maximum Trip temperature : 280C maximum (To be used only once) Soldering time : 3 seconds maximum Be careful not to cause excessive force to be applied to the potentiometer after mounting. Reduce effects of solder temperature and time as much as possible by giving maximum allowable pre-heating. a STORAGE To prevent damage to the electrode, be sure to observe the following cautions for storage. Store in 40C maximum ambient temperature, and 70C maximum ambient RH. For maximum possible shelf life do not disturb polythene sleeve until you are ready to use potentiometers. Store where there are no harmful gasses containing sulphur or chlorine. All inquires should be directed to: Piher International Corp. 903 Feehanville Drive. Mt. Prospect, IL 60056 > @bE M@ b424700 DODDS 541 mm Tel. 708-390-6680/Fax 708-390-9866