3 mm SMD SURFACE MOUNT CERMET TRIMMERS SM-3/31 INTERNAL STRUCTURE RoHS RoHS compliant 1 9 2 8 3 4 5 7 6 Part name Material Flammability PPS FEATURES UL94V-0 1 Housing Polyphenylenesulphide RoHS L 2 E Base element Ceramic D Ag-Pd 3 Electrode Ag-Pd cermet RuO2 4 Resistive element RuO2 cermet 754 UL94V-0 5 Adhesive Epoxy RoHS compliant 6 Fine adjustment is possible Wiper Multi metal alloy Automatic mounting is possible (Taping) 7 Terminal pin Copper alloy, Sn-Cu-plated Reflow soldering is possible PA Sealed construction (Washable: Refer to page 754.) UL94V-0 8 Rotor gear Polyamide 9 Shaft Brass, Nickel-plated PART NUMBER DESIGNATION S M - 3 T W 1 k ( 1 0 2 ) Series name Resistance code Electrical turn Resistance value Blank11 11 turns 15 5 turns Product shape (Shape of terminal) A, WJ - J-hook Form of packaging B Gull wing T Taping (Reel) Blank Bulk in plastic bag Please refer to the LIST OF PART NUMBERS when placing orders. 681 SM-3/31 SURFACE MOUNT TRIMMERS LIST OF PART NUMBERS Nominal resistance values Form of packaging 50 100 200 500 1 k 2 k 5 k 10 k Adjustment Electrical turns 20 k 50 k 100 k 200 k 500 k 1 M 2 M position Shape of terminal Taping (reel) Plastic bag Fig. 1 J- W SM-3TW SM-3W Top adjustment (J-hook) J- 11 A SM-3TA SM-3A (J-hook) Side adjustment B SM-3TB SM-3B (Gull wing) Fig. 1 J- W SM-31TW SM-31W Top adjustment (J-hook) J- 5 A SM-31TA SM-31A (J-hook) Side adjustment The above part numbers are all available with the respective combination B SM-31TB SM-31B of <Nominal resistance values> (Fig. 1). (Gull wing) Verify the above part numbers when placing orders. 500 pcs./reel 50 pcs./pack Taping specification is not sold separately and must be purchased in reel units. Pieces in package L E D ELECTRICAL CHARACTERISTICS MECHANICAL CHARACTERISTICS 50 ~ 2 M 5 mNm 51 gfcm maximum Nominal resistance range Operating torque 20 % Clutch action Resistance tolerance Mechanical stop 0.125 W (70 C) 0 W (150 C) 200 cycles R/R (2 +3 %) Power ratings Rotational life B 5 N 0.51 kgf minimum Resistance law Linear law Thrust to shaft DC200 V 245 3 C, 2 ~ 3 s Maximum input voltage DC200 V or power rating, whichever is smaller Solderability 100 mA 5 N 0.51 kgf 10 s Maximum wiper current 100 mA or power rating, whichever is smaller Shear (Adhesion) 90 mm 3 mm5 s, 1 11 turns (SM-3) / 5 turns (SM-31) Effective electrical turn Substrate bending Width 90 mm, bend 3 mm, 5 s, 1 time 1 % 3 5 N 0.51 kgf 10 s End resistance 1 % or 3 , whichever is greater Pull-off strength 3 % 3 Reference only C.R.V. 3 % or 3 , whichever is greater 65 ~ 150 C Operating temp. range -6 100 10 /C maximum Temp. coefficient ENVIRONMENTAL CHARACTERISTICS 100 M minimum (DC500 V) Insulation resistance Test item Test conditions Specifications AC600 V, 60 s R/R 2 % Dielectric strength 65 ~ 150 C (0.5 h), 5 cycles Thermal shock S.S. 2 % Approx. 0.10 g 10 ~ 65 C ( 80 ~ 98 %), Net weight R/R 3 % Humidity 10 cycles, 240 h 2 981 m/s , 6 ms Shock 6 directions for 3 times each R/R 1 % (Amplitude) 1.52 mm or S.S. 1 % 2 Reflow profile for soldering heat evaluation (Acceleration) 196 m/s , Vibration 10 ~ 2000 Hz, 3 directions, 12 times each (C) +5 R/R 3 % 0 Peak : 250 C 70 C, 0.125 W, 1000 h 250 Load life S.S. 2 % Over 230 C R/R 2 % 65 C, 2 h Low temp. operation S.S. 2 % 200 Pre Heating Zone R/R 3 % 180 C 150 C, 250 h High temp. exposure S.S. 2 % 150 150 C 85 C, 60 s 90 30 s Immersion seal No leaks (No continuous bubbles) 255 100 30 10 s Reflow : Peak temperature 255 C R/R 1 % Soldering heat (Please refer to the profile below.) 50 Soldering Zone Heating time Manual soldering350 10 C, 3 ~ 4 s R/R Change in total resistance Reflow : two times maximum S.S. Setting stability 682 Temperature