ST-4 SURFACE MOUNT CERMET TRIMMERS (SINGLE TURN) INTERNAL STRUCTURE RoHS compliant 1 7 2 6 5 3 4 8 9 Part name Material Flammability 1 Wiper Multi metal alloy FEATURES Cover Stainless steel (SUS 304) 2 RoHS compliant UL-94V-0 3 Housing Epoxy Wide variety (7 types) to choose from Automatic mounting is possible (Taping) 4 Terminal pin Copper alloy, Sn-Cu-plated Flow/reflow soldering is possible Sealed construction (Washable: Refer to A-328) 5 Base element Ceramic Stopper structure prevents terminal pin from being open. UL-94HB 6 O ring Silicone rubber Cross slot rotor suitable for automatic adjustment Rotor Polyphenylenesulphide UL-94V-0 7 8 Electrode Ag-Pd cermet 9 Resistive element RuO2 cermet 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 E Sn-Cu (Lead-free) Product shape (Shape of terminal) Form of packaging A, G J-hook B, D, H Gull wing T Taping (Reel) C, F Through hole pins Blank Bulk in plastic bag S T - 4 2 E T A 2 0 0 ( 2 0 1 ) Resistance code Series name (cross slot) Terminal pin Resistance value E Sn-Cu (Lead-free) Product shape (Shape of terminal) Form of packaging A, G J-hook B, D, H Gull wing T Taping (Reel) C, F Through hole pins Blank Bulk in plastic bag Please refer to the LIST OF PART NUMBERS when placing orders. Specifications are subject to change without notice.COPAL ELECTRONICS ST-4 SURFACE MOUNT TRIMMERS LIST OF PART NUMBERS Nominal resistance values A 10 A 20 50 100 200 500 1 k 2 k 5 k Form of packaging 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. C (Through hole pins) ST-4/42EC 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 A ST-4/42EF F (Through hole pins) ST-4/42ETG ST-4/42EG G (J-hook) Side adjustment H (Gull wing) ST-4/42ETH ST-4/42EH Pieces in package 500 pcs./reel 100 pcs./pack MECHANICAL CHARACTERISTICS A The products indicated by A mark are manufactured upon receipt of order basis. 240 (1 turn) Mechanical angle C slot : ST-4E ,B slot : ST-42E Operating torque 10 mNm 102 gfcm maximum ELECTRICAL CHARACTERISTICS Stop strength 30 mNm 306 gfcm minimum 100 cycles R/R (2 +3 %) Rotational life 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 210 (1 turn) Effective electrical angle 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 % 65 ~ 125 C (0.5 h), 5 cycles Thermal shock S.S. 1 % -6 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 % (C) +5 R/R 3 % 125 C, 250 h 0 High temp. exposure Peak : 250 C S.S. 2 % 250 Over 230 C 85 C, 60 s Immersion seal No leaks (No continuous bubbles) 200 Pre Heating Zone 180 C 150 150 C Flow : 260 3 C as the temperature in a pot of molten solder, immersion from head of terminal to 90 30 s backside of board, 5 ~ 6 s, two times maximum R/R 1 % Soldering heat Reflow : Peak temperature 255 C 100 30 10 s (Please refer to the profile below.) Manual soldering 350 10 C, 3 ~ 4 s 50 Soldering Zone Heating time Reflow : two times maximum R/R Change in total resistance S.S. Setting stability Specifications are subject to change without notice. Specifications in this catalog are for reference. The formal specification sheets will be submitted upon request. Temperature