ST7EA502

ST-7 構造図 SURFACE MOUNT CERMET TRIMMERS (3 TURNS) RoHS compliant ST-7 INTERNAL STRUCTURE ① ⑨ ⑬ ⑫ ⑧ ⑪ ③ ④ ⑦ ⑥ ⑤ ② Part name ■ FEATURES ● ● ● ● ● ● RoHS compliant Fine adjustment is possible Automatic mounting is possible (Taping) Flow/reflow soldering is possible Sealed construction (Washable: Refer to page 698.) Resin material is UL Recognized 94V-0 ⑩ Material ① Rotor gear ② Base element ③ Terminal pin ④ Resistive element RuO2 cermet ⑤ Electrode Ag-Pd cermet ⑥ Housing base ⑦ Wiper ⑧ Shaft ⑨ Housing ⑩ Shaft “O” ring ⑪ Base “O” ring ⑫ Clutch spring ⑬ Cover Polyphenylenesulphide Ceramic Copper alloy, Sn-Cu-plated Polyphenylenesulphide Multi metal alloy Polyphenylenesulphide Silicone rubber Stainless steel ■ PART NUMBER DESIGNATION S T - 7 E T A 1 kΩ ( 1 0 2 ) Series name Resistance code Terminal pin Resistance value E：Sn-Cu (Lead-free) Form of packaging T：Taping (Reel) Blank：Bulk in plastic bag ※ Please refer to the LIST OF PART NUMBERS when placing orders. Product shape (Shape of terminal) A：J-hook(Top adjustment) B：Gull wingg(Top adjustment) ST-7 SURFACE MOUNT TRIMMERS ■ LIST OF PART NUMBERS Adjustment position Shape of terminal Form of packaging Taping (reel) Plastic bag ST-7ETA ST-7EA B ( Gull wing ) ST-7ETB ST-7EB A (J-hook) Top adjustment Pieces in package 500 pcs./reel 50 Ω 100 Ω 200 Ω 500 Ω 10 kΩ 20 kΩ 50 kΩ 100 kΩ 200 kΩ 500 kΩ 1 MΩ 1 kΩ 2 kΩ 5 kΩ Fig. 1 ※ The above part numbers are all available with the respective combination of (Fig. 1). ※ Verify the above part numbers when placing orders. ※ Taping specification is not sold separately and must be purchased in reel units. 50 pcs./pack ■ ELECTRICAL CHARACTERISTICS ■ MECHANICAL CHARACTERISTICS Nominal resistance range 50 Ω ~ 1 MΩ Mechanical turn 3 turns Resistance tolerance ± 20 % Operating torque 5 mN·m {51 gf·cm} maximum Mechanical stop Clutch action Power ratings 0.25 W (70 °C) 0 W (125 °C) Resistance law Linear law Rotational life 100 cycles [ Δ R/R ≦ ± (2 Ω +3 %)] Thrust to shaft 5 N {0.51 kgf} minimum 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 Substrate bending Width 90 mm, bend 3 mm, 5 s, 1 time 2.5 turns End resistance 1 % or 2 Ω, whichever is greater C.R.V. 1 % or 3 Ω, whichever is greater Operating temp. range Temp. coefficient Insulation resistance − 55 ~ 125 °C 50 Ω : ± 250 10-6/°C maximum 100 Ω ~ 1 MΩ : ± 100 10-6/°C maximum 1000 MΩ minimum (DC500 V) Pull-off strength { }：Reference only ■ ENVIRONMENTAL CHARACTERISTICS Test item Thermal shock Dielectric strength AC600 V, 60 s Humidity Net weight Approx. 0.25 g Shock Vibration 〈Reflow profile for soldering heat evaluation〉 Temperature (℃) 250 200 150 100 50 Peak : 250 0 ℃ 5 N {0.51 kgf} 10 s Load life Test conditions Specifications − 65 ~ 125 °C (0.5 h), 5 cycles [ Δ R/R ≦ 2 %] [S.S. ≦ 1 %] − 10 ~ 65 °C (80 ~ 98 %), 10 cycles, 240 h 981 m/s2, 6 ms 6 directions for 3 times each (Amplitude) 1.52 mm or (Acceleration) 196 m/s2, 10 ~ 2000 Hz, 3 directions, 12 times each 70 °C, 0.25 W, 1000 h 180 ℃ 150 ℃ Pre Heating Zone Heating time Soldering Zone [ Δ R/R ≦ 3 %] [S.S. ≦ 1 %] [ Δ R/R ≦ 2 %] [S.S. ≦ 2 %] [ Δ R/R ≦ 3 %] [S.S. ≦ 2 %] − 55 °C, 2 h High temp. exposure 125 °C, 250 h Immersion seal 85 °C, 60 s No leaks (No continuous bubbles) Soldering heat Flow : 260 ± 3 °C as the temperature in a pot of molten solder, immer­sion from head of ter­minal to backside of board, 5 ~ 6 s, two times maximum Reflow : Peak temperature 255 °C (Please refer to the profile below.) Manual soldering：350 ± 10 °C, 3 ~ 4 s [ Δ R/R ≦ 1 %] 90±30 s 30±10 s [ Δ R/R ≦ 1 %] [S.S. ≦ 1 %] Low temp. operation +5 Over 230 ℃ [ Δ R/R ≦ 2 %] Reflow : two times maximum Δ R/R：Change in total resistance S.S. ：Setting stability ST-7 SURFACE MOUNT TRIMMERS ■ MAXIMUM INPUT RATINGS ■ RECOMMENDED P.C.B. PAD OUTLINE DIMENSIONS Nominal resistance values ( Ω ) ● ST-7EA 2 1 k 2 k 5 k 10 k 20 k 50 k 102 202 502 103 203 503 15.8 22.4 35.4 50.0 70.7 112 15.8 11.2 7.07 5.00 3.54 2.24 100 k 200 k 500 k 1 M 104 204 504 105 158 200 200 200 1.58 1.00 0.40 0.20 2 0 0 5.5 70.7 50.0 35.4 22.4 2 3.53 5.00 7.07 11.2 (Unit: mm) 2 500 101 201 501 3.5 50 100 200 500 ● ST-7EB 2 Maximum input Maximum wiper voltage (V) current (mA) 2 Resistance code 1.6 1.6 1.6 2.35 1.6 2.35 Note) The zero point is the center of mounting. ■ OUTLINE DIMENSIONS Unless otherwise specified, tolerance : ± 0.3 (Unit : mm) ● ST-7EA Top adjustment ① 0.5 W × 1.8 L × 0.5 D 0 6.8 –0.5 1.5 6.1 t = 0.15 1 1.2 3.4 1.5 2 2 – 0.8 0.02 min. 3 ② 4.3 6.4 Lead-free Identification mark ③ CW rotation 2.3 Resistance code & Production date code 0.5 W × 1.8 L × 0.5 D 6.4 2 3.4 1.5 1.2 t = 0.15 3 0.02 min. Resistance code & Production date code 0.35 min. 1 7.8 6.1 1.5 Lead-free Identification mark 0.35 min. ● ST-7EB Top adjustment 2 – 0.8 2.3 ※The ST-7 series has a different terminal arrange-ment from the ST-32 and ST-4 series. Pay attention to the location of terminals number 1 and 3. (Resistance decreases when the shaft is turned CCW.) ST-7 SURFACE MOUNT TRIMMERS ■ 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 (500 pcs.). Maximum number of consecutive missing pieces = 2 Leader length and reel dimension are shown in the dia- grams below. ● EMBOSSED TAPE DIMENSIONS ST-7TB Taping Empty Filled ● REEL DIMENSIONS （Conforms to JIS C 0806-3） （In accordance with EIAJ ET-7200A） (Unit: mm) Empty End 21±0.8 Head 40 mm min. 50 min. 17.4±1 2±0.5 20 pitches min. Leader 13±0.2 400 mm min. Direction of feed 254±2 ● ST-7ETB 4±0.1 2±0.1 0.4±0.1 1.75±0.1 12±0.1 7.5±0.1 Installation example (ST-7EA) 16 7.5±0.1 1.75±0.1 0.4±0.1 +0.1 0 2±0.1 5 4±0.1 Φ1. +0.1 0 .5 Φ1 12±0.1 5 Direction of feed ● 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. Installation example (ST-7EB) 16 ● ST-7ETA 21.4±1 5 Direction of feed