SURFACE MOUNT CERMET TRIMMERS SM-42/43 INTERNAL STRUCTURE RoHS compliant 9 1 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 available Automatic mounting is available (Taping) Electrode Ag-Pd cermet 3 Reflow soldering is available 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 - 4 T W 1 0 0 ( 1 0 1 ) Series name Resistance code Electrical turn Resistance value 211 turns 35 turns Form of packaging Product shape (Shape of terminal) TTaping (Reel) W, XTop adjustmet BlankBulk in plastic bag A, BSide adjustmet Please refer to the LIST OF PART NUMBERS when placing orders.SM-42/43 SURFACE MOUNT TRIMMERS LIST OF PART NUMBERS Nominal resistance values Form of packaging A 10 A20 50 100 200 500 1 k 2 k 5 k Adjustment Electrical turn Shape of terminal position Taping (reel) Plastic bag 10 k 20 k 50 k 100 k 200 k 500 k 1 M 2 M Fig. 1 W(J-hook) SM-42TW SM-42W The products indicated by A mark are manufactured upon receipt of order basis. Top adjustment X (Gull wing) SM-42TX SM-42X The above part numbers are all available with the respective combination of 11 <Nominal resistance values> (Fig. 1). J A SM-42TA SM-42A Verify the above part numbers when placing orders. (J-hook) Side adjustment Taping specification is not sold separately and must be purchased in reel units. B (Gull wing) SM-42TB SM-42B W(J-hook) SM-43TW SM-43W Top adjustment X (Gull wing) SM-43TX SM-43X 5 A (J-hook) SM-43TA SM-43A Side adjustment B (Gull wing) SM-43TB SM-43B MECHANICAL CHARACTERISTICS TA, TB : 500 pcs./reel Pieces in package 50 pcs./pack Operating torque 17.6 mNm 180 gfcm maximum TW, TX : 250 pcs./reel Mechanical stop Clutch action Rotational life 200 cycles R/R (3 +3 %) Thrust to shaft 5 N 0.51 kgf minimum ELECTRICAL CHARACTERISTICS Solderability 245 3 C, 2 ~ 3 s Nominal resistance range 10 ~ 2 M Shear (Adhesion) 5 N 0.51 kgf 10 s Resistance tolerance 10 % Substrate bending Width 90 mm, bend 3 mm, 5 s, 1 time Power ratings 0.25 W (85 C) 0 W (150 C) Pull-off strength 5 N 0.51 kgf 10 s Resistance law Linear law Reference only Maximum input voltage DC300 V or power rating, whichever is smaller Maximum wiper current 100 mA or power rating, whichever is smaller ENVIRONMENTAL CHARACTERISTICS Effective electrical turn 11 turns (SM-42), 5 turns (SM-43) End resistance 1 % or 2 , whichever is greater Test item Test conditions Specifications R/R 2 % C.R.V. 1 % or 3 , whichever is greater Thermal shock 65 ~ 150 C (0.5 h), 5 cycles S.S. 1 % 10 ~ 65 C (80 ~ 98 %), Operating temp. range 65 ~ 150 C Humidity R/R 2 % 10 cycles, 240 h 2 981 m/s , 6 ms -6 Temp. coefficient 100 10 /C maximum Shock 6 directions for 3 times each R/R 1 % (Amplitude) 1.52 mm or Insulation resistance 100 M minimum (DC500 V) S.S. 1 % 2 Vibration (Acceleration) 196 m/s , 10 ~ 2000 Hz, 3 directions, 12 times each Dielectric strength AC600 V, 60 s R/R 3 % or 3 Load life 85 C, 0.25 W, 1000 h S.S. 2 % Net weight Approx. 0.17 g R/R 1 % Low temp. operation 65 C, 2 h S.S. 1 % R/R 2 % Reflow profile for soldering heat evaluation High temp. exposure 150 C, 250 h S.S. 1 % No leaks Immersion seal 85 C, 60 s W, XTop adjustmet () +5 (No continuous bubbles) Peak : 250 0 A, BSide adjustmet 250 Over 230 Reflow : Peak temperature 255 C 200 Pre Heating Zone 180 (Please refer to the profile below.) Soldering heat R/R 1 % 150 Manual soldering350 150 90 30 s 10 C, 3 ~ 4 s 100 30 10 s 50 Soldering Zone R/RChange in total resistance Heating time S.S. Setting stability Reflow : two times maximum Temperature