ST-4 SURFACE MOUNT CERMET TRIMMERS (SINGLE TURN) ST-4 INTERNAL STRUCTURE RoHS compliant 1 7 6 2 5 3 4 8 9 Part name Material Flammability Wiper Multi metal alloy 1 Stainless steel FEATURES Cover 2 (SUS 304) RoHS compliant Housing Epoxy UL94V-0 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 Sealed construction (Washable: Refer to page 698.) 5 Stopper structure prevents terminal pin from being open. O ring Silicone rubber UL94HB 6 Cross slot rotor suitable for automatic adjustment Rotor Polyphenylenesulphide UL94V-0 7 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 ) Series name (minus slot) Resistance code Terminal pin Resistance value ESn-Cu (Lead-free) Product shape (Shape of terminal) A, GJ-hook Form of packaging B, D, HGull wing TTaping (Reel) C, FThrough hole pins BlankBulk in plastic bag S T - 4 2 E T A 2 0 0 ( 2 0 1 ) Series name (cross slot) Resistance code Terminal pin Resistance value ESn-Cu (Lead-free) Product shape (Shape of terminal) Form of packaging A, GJ-hook B, D, HGull wing TTaping (Reel) C, FThrough hole pins BlankBulk in plastic bag 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 terminal position Taping (reel) Plastic bag 10 k 20 k 50 k 100 k 200 k 500 k 1 M 2 M Fig. 1 A ( J-hook ) ST-4/42ETA ST-4/42EA Not manufactured Top The above part numbers are all available with the respective combination of B ( Gull wing ) ST-4/42ETB ST-4/42EB adjustment <Nominal resistance values> (Fig. 1). Verify the above part numbers when placing orders. Through hole pins ST-4/42EC C ( ) Taping specification is not sold separately and must be purchased in reel units. A ST-4/42ETD A ST-4/42ED Cross slot available : ST-42E D ( Gull wing ) Rear adjustment F ( Through hole pins A ST-4/42EF ) G ( J-hook ) ST-4/42ETG ST-4/42EG Side adjustment H ( Gull wing ) ST-4/42ETH ST-4/42EH Pieces in package 500 pcs./reel 100 pcs./pack The products indicated by A mark are manufactured upon receipt of order basis. MECHANICAL CHARACTERISTICS C slot : ST-4E , B slot : ST-42E Mechanical angle 240 (1 turn) Operating torque 10 mNm 102 gfcm maximum Stop strength 30 mNm 306 gfcm minimum ELECTRICAL CHARACTERISTICS 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 Humidity R/R 2 % 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 (Acceleration) 196 m/s , Vibration 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 +5 High temp. exposure S.S. 2 % Peak : 250 0 250 No leaks 85 C, 60 s Immersion seal Over 230 (No continuous bubbles) 200 Pre Heating Zone 180 Flow : 260 3 C as the temperature in a 150 150 pot of molten solder, immersion from head of term inal to backside of board, 5 ~ 6 s, two 90 30 s times maximum R/R 1 % Soldering heat Reflow : Peak temperature 255 C 100 30 10 s (Please refer to the profile below.) Manual soldering350 10 C, 3 ~ 4 s 50 Soldering Zone Heating time Reflow : two times maximum R/RChange in total resistance S.S. Setting stability Temperature