SURFACE MOUNT CERMET TRIMMERS SM-3/31 INTERNAL STRUCTURE RoHS compliant 1 9 2 8 3 4 5 7 6 Part name Material Flammability FEATURES Housing Polyphenylenesulphide UL94V-0 1 RoHS compliant Base element Ceramic 2 Fine adjustment is possible Automatic mounting is possible (Taping) Electrode Ag-Pd cermet 3 Reflow soldering is possible Sealed construction (Washable: Refer to page 698.) Resistive element RuO2 cermet 4 Adhesive Epoxy 5 Wiper Multi metal alloy 6 Terminal pin Copper alloy, Sn-Cu-plated 7 Rotor gear Polyamide UL94V-0 8 Shaft Brass, Nickel-plated 9 PART NUMBER DESIGNATION S M - 3 T W 1 k ( 1 0 2 ) Series name Resistance code Electrical turn Resistance value Blank11 turns 15 turns Product shape (Shape of terminal) A, WJ-hook Form of packaging BGull wing TTaping (Reel) BlankBulk in plastic bag Please refer to the LIST OF PART NUMBERS when placing orders.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 Shape of terminal position Taping (reel) Plastic bag 20 k 50 k 100 k 200 k 500 k 1 M 2 M Fig. 1 Top adjustment W (J-hook) SM-3TW SM-3W 11 A (J-hook) SM-3TA SM-3A Side adjustment B (Gull wing) SM-3TB SM-3B Top adjustment W (J-hook) SM-31TW SM-31W 5 A (J-hook) SM-31TA SM-31A Side adjustment The above part numbers are all available with the respective combination B (Gull wing) SM-31TB SM-31B of <Nominal resistance values> (Fig. 1). Verify the above part numbers when placing orders. Pieces in package 500 pcs./reel 50 pcs./pack Taping specification is not sold separately and must be purchased in reel units. ELECTRICAL CHARACTERISTICS MECHANICAL CHARACTERISTICS Nominal resistance range 50 ~ 2 M Operating torque 5 mNm 51 gfcm maximum Resistance tolerance 20 % Mechanical stop Clutch action Power ratings 0.125 W (70 C) 0 W (150 C) Rotational life 200 cycles R/R (2 +3 %) B Resistance law Thrust to shaft 5 N 0.51 kgf minimum Linear law Maximum input voltage DC200 V or power rating, whichever is smaller Solderability 245 3 C, 2 ~ 3 s Maximum wiper current 100 mA or power rating, whichever is smaller Shear (Adhesion) 5 N 0.51 kgf 10 s Effective electrical turn 11 turns (SM-3) / 5 turns (SM-31) Substrate bending Width 90 mm, bend 3 mm, 5 s, 1 time End resistance 1 % or 3 , whichever is greater Pull-off strength 5 N 0.51 kgf 10 s Reference only C.R.V. 3 % or 3 , whichever is greater Operating temp. range 65 ~ 150 C -6 Temp. coefficient 100 10 /C maximum ENVIRONMENTAL CHARACTERISTICS Insulation resistance 100 M minimum (DC500 V) Test item Test conditions Specifications Dielectric strength AC600 V, 60 s R/R 2 % Thermal shock 65 ~ 150 C (0.5 h), 5 cycles S.S. 2 % Net weight Approx. 0.10 g 10 ~ 65 C (80 ~ 98 %), Humidity R/R 3 % 10 cycles, 240 h 2 981 m/s , 6 ms Shock 6 directions for 3 times each Reflow profile for soldering heat evaluation R/R 1 % (Amplitude) 1.52 mm or S.S. 1 % 2 (Acceleration) 196 m/s , Vibration 10 ~ 2000 Hz, 3 directions, 12 times each () +5 Peak : 250 0 250 R/R 3 % Load life 70 C, 0.125 W, 1000 h S.S. 2 % Over 230 R/R 2 % Low temp. operation 65 C, 2 h 200 Pre Heating Zone S.S. 2 % 180 R/R 3 % High temp. exposure 150 C, 250 h S.S. 2 % 150 150 No leaks 90 30 s Immersion seal 85 C, 60 s (No continuous bubbles) 100 30 10 s Reflow : Peak temperature 255 C Soldering heat (Please refer to the profile below.) R/R 1 % 50 Soldering Zone Heating time Manual soldering350 10 C, 3 ~ 4 s Reflow : two times maximum R/RChange in total resistance S.S. Setting stability Temperature