SURFACE MOUNT CERMET TRIMMERS RoHS compliant SM-3/31 INTERNAL STRUCTURE 1 9 2 3 4 5 8 7 6 Part name FEATURES RoHS compliant Fine adjustment is possible Automatic mounting is possible (Taping) Reflow soldering is possible Sealed construction (Washable: Refer to page 698.) Material Flammability Polyphenylenesulphide UL94V-0 1 Housing 2 Base element 3 Electrode Ag-Pd cermet 4 Resistive element RuO2 cermet 5 Adhesive 6 Wiper 7 Terminal pin 8 Rotor gear 9 Shaft Ceramic Epoxy -- Multi metal alloy Copper alloy, Sn-Cu-plated Polyamide UL94V-0 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 turns 15 turns Form of packaging TTaping (Reel) BlankBulk in plastic bag Please refer to the LIST OF PART NUMBERS when placing orders. Product shape (Shape of terminal) A, WJ-hook BGull wing SM-3/31 SURFACE MOUNT TRIMMERS LIST OF PART NUMBERS Adjustment position Electrical turns 11 Side adjustment Top adjustment 5 Side adjustment 20 k 50 k 100 k 200 k 500 k 1 M 2 M Taping (reel) Plastic bag W (J-hook) SM-3TW SM-3W A (J-hook) SM-3TA SM-3A B (Gull wing) SM-3TB SM-3B W (J-hook) SM-31TW SM-31W A (J-hook) SM-31TA SM-31A B (Gull wing) SM-31TB SM-31B 500 pcs./reel 50 pcs./pack Pieces in package ELECTRICAL CHARACTERISTICS Nominal resistance range Fig. 1 The above part numbers are all available with the respective combination of <Nominal resistance values> (Fig. 1). Verify the above part numbers when placing orders. Taping specification is not sold separately and must be purchased in reel units. MECHANICAL CHARACTERISTICS 50 ~ 2 M Operating torque 5 mN*m {51 gf*cm} maximum 20 % Mechanical stop Clutch action Resistance tolerance Power ratings 50 100 200 500 1 k 2 k 5 k 10 k Form of packaging Shape of terminal Top adjustment Nominal resistance values 0.125 W (70 C) 0 W (150 C) Rotational life 200 cycles [ R/R (2 +3 %)] B Thrust to shaft 5 N {0.51 kgf} minimum Resistance law 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 C.R.V. 3 % or 3 , whichever is greater Insulation resistance 100 10-6/C maximum 100 M minimum (DC500 V) Dielectric strength AC600 V, 60 s Net weight Approx. 0.10 g Reflow profile for soldering heat evaluation Temperature () 250 200 150 100 50 Peak : 250 +5 0 Over 230 180 150 { }Reference only - 65 ~ 150 C Operating temp. range Temp. coefficient 5 N {0.51 kgf} 10 s Pre Heating Zone 90 30 s 30 10 s Heating time Soldering Zone Reflow : two times maximum ENVIRONMENTAL CHARACTERISTICS Test item Test conditions Specifications Thermal shock - 65 ~ 150 C (0.5 h), 5 cycles [ R/R 2 %] [S.S. 2 %] Humidity [ R/R 3 %] Shock - 10 ~ 65 C (80 ~ 98 %), 10 cycles, 240 h 981 m/s2, 6 ms 6 directions for 3 times each Vibration (Amplitude) 1.52 mm or (Acceleration) 196 m/s2, 10 ~ 2000 Hz, 3 directions, 12 times each Load life 70 C, 0.125 W, 1000 h Low temp. operation - 65 C, 2 h High temp. exposure 150 C, 250 h Immersion seal 85 C, 60 s Reflow : Peak temperature 255 C Soldering heat (Please refer to the profile below.) Manual soldering350 10 C, 3 ~ 4 s [ R/R 1 %] [S.S. 1 %] [ R/R 3 %] [S.S. 2 %] [ R/R 2 %] [S.S. 2 %] [ R/R 3 %] [S.S. 2 %] No leaks (No continuous bubbles) [ R/R 1 %] R/RChange in total resistance S.S. Setting stability SM-3/31 SURFACE MOUNT TRIMMERS MAXIMUM INPUT RATINGS Nominal resistance values ( ) Resistance code Maximum input voltage (V) Maximum wiper current (mA) 50 100 200 500 500 101 201 501 2.50 3.53 5.00 7.91 50.0 35.4 25.0 15.8 1k 2k 5k 10 k 20 k 50 k 102 202 502 103 203 503 11.2 15.8 25.0 35.4 50.0 79.1 11.2 7.91 5.00 3.54 2.50 1.58 100 k 200 k 500 k 1M 2M 104 204 504 105 205 112 158 200 200 200 1.12 0.79 0.40 0.20 0.10 RECOMMENDED P.C.B. PAD OUTLINE DIMENSIONS SM-3W/31W SM-3A/31A (Unit : mm) SM-3B/31B 1.3 1.3 1.3 4 0 0 0 1.6 1.6 1.6 0 4.4 1.3 2.43 3.12 1.6 1.6 2 1.3 2.8 0.9 2.8 2 0.9 0.9 2.8 2.8 Also available to place as the above. 0.9 Note) The zero point is the center of mounting. OUTLINE DIMENSIONS Unless otherwise specified, tolerance : 0.3 (Unit : mm) SM-3W/31W Top adjustment 1 3 CW rotation 2 Resistance code & Production date code 1 0.8 1 3 2.3 3.2 3.5 3.9 0.6 2.8 2 3.9 4.2 0.4W x 1.3L x 0.3D 0.8 Note the terminal position. SM-3/31 SURFACE MOUNT TRIMMERS OUTLINE DIMENSIONS Unless otherwise specified, tolerance : 0.3 (Unit : mm) SM-3A/31A Side adjustment SM-3B/31B Side adjustment 2 Note the terminal position. 2.5 2.5 0.4W x 1.3L x 0.3D 0.4W x 1.3L x 0.3D 3.9 3.9 1 3.4 3 - 0.8 2 5.3 3.9 3 - 0.8 2 3.4 3.9 1 3 CW rotation Resistance code & Production date code Resistance code & Production date code 4.4 1 2 - 0.6 3 1 2.8 3 2 - 0.6 2.8 1 PACKAGING SPECIFICATIONS <Taping packaging specifications> Taping version is packaged in 500 pcs. per reel. Orders will be accepted for units of 500 pcs., i.e., 500, 1000, 1500 pcs., etc. Taping version is boxed with one reel. EMBOSSED TAPE DIMENSIONS Maximum number of consecutive missing pieces = 2 Leader length and reel dimension are shown in the diagrams below. REEL DIMENSIONS Conforms to JIS C 0806-3 In accordance with EIAJ ET-7200A Filled (Unit: mm) Empty End 13 Head Direction of feed 20 pitches min. 210.8 20.5 Leader 60 40 mm min. +1 0 +1 0 Empty 400 mm min. 130.2 0 180 -1.5 15.41 SM-3/31 SURFACE MOUNT TRIMMERS SM-3TW/31TW 1.75 0.1 4 0.1 2 0.05 1. A 0.4 0.1 Installation example (SM-3W) 12 +0.3 -0.1 5.5 0.05 .1 +0 0 5 3 A 2 8 0.1 1 Cross section A-A 4.7 .1 +0 0 5 1. 4 0.1 2 0.05 A 3 1.75 0.1 SM-3TA/31TA 0.4 0.1 Installation example (SM-3A) +0.3 12 -0.1 5.5 0.05 1 A 3.9 8 0.1 2 Cross section A-A .1 +0 0 5 1. 4 0.1 2 0.05 A 3 1.75 0.1 SM-3TB/31TB 0.4 0.1 Installation example (SM-3B) A 2 8 0.1 <Bulk pack specifications> Unit of bulk in a plastic bag is 50 pcs. per pack. Boxing of bulk in a plastic bag is performed with 200 pcs. per box. +0.3 12 -0.1 5.5 0.05 1 3.9 Cross section A-A