ST-32 SURFACE MOUNT CERMET TRIMMERS (SINGLE TURN) S T E T A ( 1 2 ) FEATURES PART NUMBER DESIGNATION

Transcription

1 SURFACE MOUNT CERMET TRIMMERS (SINGLE TURN) ST- RoHS compliant INTERNAL STRUCTURE FEATURES Part name Wiper Cover Housing Terminal pin Base element O ring Rotor Electrode Resistive element Material Multi metal alloy Stainless steel (SUS 4) Epoxy Copper alloy, Sn-Cu-plated Ceramic Silicone rubber PPS Polyphenylenesulphide Ag-Pd cermet RuO cermet Flammability UL94V- UL94HB UL94V- PART NUMBER DESIGNATION S T - E T A ( ) Series name Resistance code Terminal pin E Sn-Cu (Lead-free) Resistance value Form of packaging T Taping (Reel) Bulk in plastic bag Blank Product shape (Shape of terminal) J-hook Gull wing Please refer to the LIST OF PART NUMBERS when placing orders.

2 ST- LIST OF PART NUMBERS Adjustment position Shape of terminal A ( J-hook Top adjustment B ( Gull wing) G ( J-hook ) Side adjustment H ( Gull wing) Pieces in package ) Form of packaging Taping (reel) ST-ETA ST-ETB ST-ETG ST-ETH Plastic bag ST-EA ST-EB ST-EG ST-EH 5 pcs./reel pcs./pack Nominal resistance values A A 5 5 k k k 5 k k k k 5 k k k 5 k M M Fig. A The products indicated by A mark are manufactured upon receipt of order basis. The part numbers on the left are all available with the respective com bi na tion of <Nominal resistance values> (Fig. ). Verify the above part numbers when placing orders. Taping specification is not sold separately and must be purchased in reel units. ELECTRICAL CHARACTERISTICS Nominal resistance range Resistance tolerance Power ratings Resistance law Maximum input voltage Maximum wiper current Effective electrical angle End resistance C.R.V. Operating temp. range Temp. coefficient Insulation resistance Dielectric strength Net weight ~ M %.5 W (7 C) W (5 C) Linear law (B) DC V or power rating, whichever is smaller ma or power rating, whichever is smaller ( turn) % or, whichever is greater % or, whichever is greater 55 ~ 5 C ~ 5 : 5-6 / C maximum ~ M : -6 / C maximum M minimum (DC5 V) AC5 V, 6 s Approx..5 g (ST-EA, EB) Approx.. g (ST-EG, EH) Reflow profile for soldering heat evaluation Temperature ( C) C 5 C +5 Peak : 5 C Over C Pre Heating Zone 9 ± s Heating time ± s Soldering Zone Reflow : two times maximum MECHANICAL CHARACTERISTICS Mechanical angle Operating torque Stop strength Rotational life Thrust to rotor Solderability Shear (Adhesion) Substrate bending Pull-off strength 5 ( turn) 5 mn m {5 gf cm} maximum mn m {4 gf cm} minimum cycles [ R/R ( %)] 5 N {.5 kgf} minimum 45 C, ~ s 5 N {.5 kgf} s Width 9 mm, bend mm, 5 s, time 5 N {.5 kgf} s { } Reference only ENVIRONMENTAL CHARACTERISTICS Test item Test conditions Specifications Thermal shock 65 ~ 5 C (.5 h), 5 cycles [ R/R %] [S.S. %] Humidity ~ 65 C (8 ~ 98 %), cycles, 4 h [ R/R %] Shock 98 m/s, 6 ms 6 directions for times each Vibration Load life Low temp. operation High temp. exposure Immersion seal Soldering heat (Amplitude).5 mm or (Acceleration) 96 m/s, ~ Hz, directions, times each 7 C,.5 W, h 55 C, h 5 C, 5 h 85 C, 6 s Flow : 6 C as the temperature in a pot of molten solder, immer sion from head of ter minal to backside of board, 5 ~ 6 s, two times maximum. Reflow : Peak temperature 55 C (Please refer to the profile below.) Manual soldering 5 C, ~ 4 s [ R/R %] [S.S. %] [ R/R %] [S.S. %] [ R/R %] [S.S. %] [ R/R %] [S.S. %] No leaks (No continuous bubbles) [ R/R %] R/RChange in total resistance S.S. Setting stability

3 ST- MAXIMUM INPUT RATINGS Nominal resistance values ( ) Resistance code Maximum input voltage (V) Maximum wiper current (ma) A. A k.. k k k k k k k k 5. k k 55.4 M 6. M 6. A The products indicated by A mark are manufactured upon receipt of order basis. RECOMMENDED P.C.B. PAD OUTLINE DIMENSIONS ST-EA, EG ST-EB, EH.6 (Unit : mm) For reflow soldering..8.. Note) The zero point is the center of mounting.

4 ST- OUTLINE DIMENSIONS Unless otherwise specified, tolerance :. (Unit : mm) ST-EA Top adjustment.5.5 Cross slot for a bit driver, depth :.45 digit (Location reversed every years).6 Note the terminal position. CW rotation t =.. Resistance code digits ST-EB Top adjustment.5.5 Cross slot for a bit driver, depth :.45 digit (Location reversed every years) t =.. Resistance code digits

5 ST- OUTLINE DIMENSIONS Unless otherwise specified, tolerance :. (Unit : mm) CW rotation Side adjustment Note the terminal position. Cross slot for a bit driver, depth :.45.6 digit (Location reversed every years) Adjustment ST-EG Resistance code digits t =. ST-EH Side adjustment Cross slot for a bit driver, depth : digit (Location reversed every years).5. Adjustment Resistance code digits t =.

6 ST- PACKAGING SPECIFICATIONS <Taping packaging specifications> EMBOSSED TAPE DIMENSIONS End Empty Filled Empty 4 mm min. pitches min. Leader Direction of feed 4 mm min. Head REEL DIMENSIONS JIS C 86- Conforms to JIS C 86- EIAJ ET-7A In accordance with EIAJ ET-7A (Unit: mm) φ ±.8 φ ±. ±.5 + (ETA/ETB).4± (ETG/ETH) φ 6 + (ETA/ETB) 5 min.(etg/eth) φ φ 8.5(ST-ETA/ETB) φ 54± (ST-ETG/ETH) 5.4± (ETA/ETB) 7.4± (ETG/ETH) ST-ETA, ETB ST-ETG, ETH 8±. φ ±. ±.5 Direction of feed.75±. 5.5±.5.±. Installation example (ST-EA).5 φ.5 +. ±. 8±. 4±. Direction of feed.75±. 5.5±..4±. 5.5 max. Installation example (ST-EH) <Bulk pack specifications>