45 SURFACE MOUNT CERMET TRIMMERS (SINGLE TURN)ST-4 INTERNAL STRUCTURE RoHS compliant 1 7 6 2 5 3 4 8 9 Part name Material Wiper Multi metal alloy 1 FEATURES Cover Stainless steel (SUS 304) 2 RoHS compliant Housing Epoxy 3 Wide variety (7 types) to choose from Automatic mounting is possible (Taping) Terminal pin Copper alloy, Sn-Cu-plated 4 Flow/reflow soldering is possible Base element Ceramic 5 Sealed construction (Washable: Refer to page 698.) Stopper structure prevents terminal pin from being open. O ring Silicone rubber 6 Cross slot rotor suitable for automatic adjustment PPS Rotor Resin materials are UL Recognized 94V-0 or 94V-1 equivalent 7 Polyphenylenesulphide Electrode Ag-Pd cermet 8 Resistive element RuO2 cermet 9 PART NUMBER DESIGNATION S T - 4 E T A 2 0 0 ( 2 0 1 ) Resistance code Series name (minus slot) Terminal pin Resistance value ESn-Cu (Lead-free) Product shape (Shape of terminal) AJ-hook (Top adjustment) Form of packaging BGull wing Top adjustment) TTaping (Reel) CThrough hole pins (Top adjustment) D Gull wing (Rear adjustment) BlankBulk in plastic bag FThrough hole pins (Rear adjustment) G J-hook (Side adjustment) HGull wing (Side adjustment) S T - 4 2 E T A 2 0 0 ( 2 0 1 ) Resistance code Series name (cross slot) Terminal pin Resistance value ESn-Cu (Lead-free) Product shape (Shape of terminal) AJ-hook (Top adjustment) Form of packaging BGull wing (Top adjustment) TTaping (Reel) CThrough hole pins (Top adjustment) D Gull wing (Rear adjustment) BlankBulk in plastic bag FThrough hole pins (Rear adjustment) G J-hook (Side adjustment) HGull wing (Side adjustment) Please refer to the LIST OF PART NUMBERS when placing orders.ST-4 SURFACE MOUNT TRIMMERS LIST OF PART NUMBERS Nominal resistance values Form of packaging A10 A20 50 100 200 500 1 k 2 k 5 k Adjustment Shape of position terminal Taping (reel) Plastic bag 10 k 20 k 5 0k 100 k 200 k 500 k 1 M 2 M Fig. 1 A ( J-hook ) ST-4/42ETA ST-4/42EA Not manufactured Top B ( Gull wing ST-4/42ETB ST-4/42EB The above part numbers are all available with the respective combination ) adjustment of <Nominal resistance values> (Fig. 1). C ( Through hole pins ST-4/42EC ) Verify the above part numbers when placing orders. Taping specification is not sold separately and must be purchased in reel units. D ( Gull wing A ST-4/42ETD A ST-4/42ED ) Cross slot available : ST-42E Rear adjustment Through hole pins A ST-4/42EF F ( ) G ( J-hook ST-4/42ETG ST-4/42EG ) Side adjustment Gull wing ) ST-4/42ETH ST-4/42EH H ( Pieces in package 500 pcs./reel 100 pcs./pack The products indicated by A mark are manufactured upon receipt of MECHANICAL CHARACTERISTICS order basis. C slot : ST-4E , B slot : ST-42E Mechanical angle 240 (1 turn) Operating torque 10 mNm 102 gfcm maximum ELECTRICAL CHARACTERISTICS Stop strength 30 mNm 306 gfcm minimum Rotational life 100 cycles R/R (2 +3 %) Nominal resistance range 10 ~ 2 M Thrust to rotor 5 N 0.51 kgf minimum Resistance tolerance 20 % Solderability 245 3 C, 2 ~ 3 s Power ratings 0.25 W (70 C) 0 W (125 C) Shear (Adhesion) 5 N 0.51 kgf 10 s Resistance law Linear law (B) Substrate bending Width 90 mm, bend 3 mm, 5 s, 1 time Maximum input voltage DC200 V or power rating, whichever is smaller Pull-off strength 5 N 0.51 kgf 10 s Maximum wiper current 100 mA or power rating, whichever is smaller Reference only Effective electrical angle 210 (1 turn) End resistance 1 % or 2 , whichever is greater ENVIRONMENTAL CHARACTERISTICS C.R.V. 1 % or 3 , whichever is greater Test item Test conditions Specifications Operating temp. range 55 ~ 125 C R/R 2 % Thermal shock 65 ~ 125 C (0.5 h), 5 cycles -6 S.S. 1 % 10 ~ 50 : 250 10 /C maximum Temp. coefficient -6 10 ~ 65 C (80 ~ 98 %), 100 ~ 2 M : 100 10 /C maximum R/R 2 % Humidity 10 cycles, 240 h 2 Insulation resistance 1000 M minimum (DC500 V) 981 m/s , 6 ms Shock 6 directions for 3 times each R/R 1 % Dielectric strength AC500 V, 60 s (Amplitude) 1.52 mm or S.S. 1 % 2 Vibration (Acceleration) 196 m/s , Approx. 0.12 g (ST-4EA, EB, EC, ED, EF) Net weight 10 ~ 2000 Hz, 3 directions, 12 times each Approx. 0.22 g (ST-4EG, EH) R/R 3 % Load life 70 C, 0.25 W 1000 h S.S. 1 % Reflow profile for soldering heat evaluation R/R 2 % 55 C, 2 h Low temp. operation S.S. 2 % R/R 3 % 125 C, 250 h High temp. exposure S.S. 2 % (C) +5 Peak : 250 0 C 250 85 C, 60 s No leaks (No continuous bubbles) Immersion seal Over 230 C 200 Pre Heating Zone 180 C Flow : 260 3 C as the temperature in a pot of molten solder, immer sion from head of 150 150 C ter minal to backside of board, 5 ~ 6 s, two times maximum R/R 1 % 90 30 s Soldering heat Reflow : Peak temperature 255 C 100 (Please refer to the profile below.) 30 10 s Manual soldering350 10 C, 3 ~ 4 s 50 Soldering Zone Heating time R/RChange in total resistance Reflow : two times maximum S.S. Setting stability Temperature