SM-42/43 SURFACE MOUNT CERMET TRIMMERS RoHS compliant INTERNAL STRUCTURE 9 1 2 8 3 4 5 7 6 Part name Material Flammability ■ FEATURES 1 Housing Polyphenylenesulphide UL94V-0 ● RoHS compliant 2 Base element Ceramic ● Fine adjustment is available ● Automatic mounting is available (Taping) 3 Electrode Ag-Pd cermet ● Reflow soldering is available ● Sealed construction (Washable: Refer to page 698.) 4 Resistive element RuO2 cermet — 5 Adhesive Epoxy 6 Wiper Multi metal alloy 7 Terminal pin Copper alloy, Sn-Cu-plated 8 Rotor gear Polyamide UL94V-0 9 Shaft Brass, Nickel-plated — ■ PART NUMBER DESIGNATION S M - 4 □ T W 1 0 0 Ω ( 1 0 1 ) Series name Resistance code Electrical turn Resistance value 2：11 turns 3：5 turns Form of packaging Product shape (Shape of terminal) T：Taping (Reel) W, X：Top adjustmet Blank：Bulk in plastic bag A, B：Side 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〉 Adjustment Form of packaging A10 Ω A20 Ω 50 Ω 100 Ω 200 Ω 500 Ω 1 kΩ 2 kΩ 5 kΩ Electrical turn Shape of terminal position Taping (reel) Plastic bag 10 kΩ 20 kΩ 50 kΩ 100 kΩ 200 kΩ 500 kΩ 1 MΩ 2 MΩ 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). A（Jリード） 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 mN·m {180 gf·cm} maximum TW, TX : 250 pcs./reel Mechanical stop Clutch action Rotational life 200 cycles [ΔR/R ≦ ± (3 Ω +3 %)] ■ ELECTRICAL CHARACTERISTICS Thrust to shaft 5 N {0.51 kgf} minimum Nominal resistance range 10 Ω ~ 2 MΩ Solderability 245 ± 3 °C, 2 ~ 3 s Resistance tolerance ± 10 % Shear (Adhesion) 5 N {0.51 kgf} 10 s Power ratings 0.25 W (85 °C) 0 W (150 °C) Substrate bending Width 90 mm, bend 3 mm, 5 s, 1 time Resistance law Linear law Pull-off strength 5 N {0.51 kgf} 10 s { }：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 Ω, whichever is greater Test item Test conditions Specifications [ΔR/R ≦ 2 %] C.R.V. 1 % or 3 Ω, whichever is greater Thermal shock−65 ~ 150 °C (0.5 h), 5 cycles [S.S. ≦ 1 %] Operating temp. range −65 ~ 150 °C Humidity −101 ~0 6c5y c°lCes (,8 204 ~0 9h8 %), [ΔR/R ≦ 2 %] 981 m/s2, 6 ms Temp. coefficient ±100 10-6/°C maximum Shock 6 directions for 3 times each [ΔR/R ≦ 1 %] Insulation resistance 100 MΩ minimum (DC500 V) (Amplitude) 1.52 mm or [S.S. ≦ 1 %] Vibration (Acceleration) 196 m/s2, 10 ~ 2000 Hz, 3 directions, 12 times each Dielectric strength AC600 V, 60 s Load life 85 °C, 0.25 W, 1000 h [ΔR/R ≦ 3 % or 3 Ω] Net weight Approx. 0.17 g [S.S. ≦ 2 %] [ΔR/R ≦ 1 %] Low temp. operation −65 °C, 2 h [S.S. ≦ 1 %] 〈Reflow profile for soldering heat evaluation〉 [ΔR/R ≦ 2 %] High temp. exposure 150 °C, 250 h [S.S. ≦ 1 %] No leaks WA,, BX：：STiodpe aaddjjuussttmmeett 2(5℃0) Peak : 250+ 50℃ Immersion seal 85 °C, 60 s (No continuous bubbles) Over 230 ℃ ure 200 180 ℃ Pre Heating Zone R(Pelefloawse : Preefaekr ttoe mthpee prartoufrilee 2b5e5lo °wC.) perat 150 150 ℃ Soldering heat Manual soldering：350 ± [ΔR/R ≦ 1 %] m 90 ± 30 s 10 °C, 3 ~ 4 s Te 100 30 ± 10 s 50 Heating time Soldering Zone ΔR/R：Change in total resistance S.S. ：Setting stability Reflow : two times maximum

SM-42/43 SURFACE MOUNT TRIMMERS ■ MAXIMUM INPUT RATINGS Nominal resistance Resistance code Maximum input Maximum wiper values (Ω) voltage (V) current (mA) A 10 100 1.00 100 A 20 200 2.00 100 50 500 3.53 70.7 100 101 5.00 50.0 200 201 7.07 35.4 500 501 11.2 22.4 1 k 102 15.8 15.8 2 k 202 22.4 11.2 5 k 502 35.4 7.07 10 k 103 50.0 5.00 20 k 203 70.7 3.54 50 k 503 112 2.24 100 k 104 158 1.58 200 k 204 223 1.12 500 k 504 300 0.60 1 M 105 300 0.30 2 M 205 300 0.15 The products indicated by A mark are manufactured upon receipt of order basis. ■ RECOMMENDED P.C.B. PAD OUTLINE DIMENSIONS (Unit: mm) ● SM-42/43A ● SM-42/43B ● SM-42/43W ● SM-42/43X 2 2 2 3 1. 2 9 1. 2 6 1. 2 9 1 0 4 0 5. 0 2. 0 5. 2 6 1. 1.3 3 9 1.3 1. 2.54 1. 1.3 2.3 2.3 1.3 2.54 Note) The zero point is the center of mounting.

SM-42/43 SURFACE MOUNT TRIMMERS ■ OUTLINE DIMENSIONS Unless otherwise specified, tolerance : ± 0.3(Unit : mm) ● SM-42/43W 3.9 1 3 3.5 Resistance code & Production date code CW rotation 1 2 2 1.3 ※Note the terminal position. 2.54 4.8 2 1. 2 – 0.8 3 φ0.516.5W, S ×lo 0t.5D 5.1 3 – 0.9 2.6 5.3 3 – 1 ● SM-42/43X 5.7 Resistance code & Production date code 3.5 2 1 3 1. 2.54 4.8 2 1. – 0.8 3 φ0.516.5W, S×l o0t.5D 2 5.1 3 – 1 5.3 ● SM-42/43A 3.7 Resistance code & Production date code 3 – 0.8 ① ② 1 – 3 2.3 1.3 4.8 2 1. 0.9 φ1.5, Slot ③ 2 – 0.56W × 0.5D 4.6 2.6 5 ● SM-42/43B 3.9 Resistance code & Production date code 2 1 0.6 – 3 2.3 1.3 4.8 3 2 1. 9 φ1.5, Slot – 0. 0.56W × 0.5D 2 4.6 2.8 6

SM-42/43 SURFACE MOUNT TRIMMERS ■ PACKAGING SPECIFICATIONS <Taping packaging specifications> ● Taping version (SM-42/43TA, TB) is packaged in 500 Maximum number of consecutive missing pieces = 2 pcs. per reel. Leader length and reel dimension are shown in the dia- Orders will be accepted for units of 500 pcs., i.e., 500, grams below. 1000, 1500 pcs., etc. SM-42/43TW, TX is packaged in 250 pcs. per reel. Orders will be accepted for units of 250 pcs., i.e., 500, 750 pcs., etc. ● EMBOSSED TAPE DIMENSIONS ● REEL DIMENSIONS （Conforms to JIS C 0806-3） （TA/TB type : In accordance with EIAJ ET-7200A） (Unit: mm) Empty Filled Empty 13+ 10(TA/TB) End Head 17±0.3 (TW, TX) 21±0.8 40 mm min. 20 pitches min. 2±0.5 Direction of feed Leader +10 0 400 mm min. 6 13±0.2 180 – 01.5(TA/TB) 15.4±1 (TA/TB) 180 – 03 (TW, TX) 19.5±1 (TW/TX) ● SM-42/43TW/TX ● SM-42/43TA/TB 4 ± 0.1 1 φ1.5 0+0.1 A 2 ± 0.1 3 1.75 ± 0. 0.5 ±I( nS0s.M1ta-l4la2tiWon) example 1φ1.5 0+0.14 ± 0.A1 2 ± 0.31 1.75 ± 0.1 0.4 ±I( nS0sM.t1a-l4la2tAio)n example 1 7.5 ± 0. +0.316–0.1 5.5 ± 0.05 12 A 4.5 2 A 1 5.75 2 8 ± 0.1 Cross section A-A Cross section A-A 12 ± 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.