features rohs compliant* conductive plastic or cermet linear and audio tapers pc board and bushing mount gangable metal bushing and shaft sealed for board washing 51/53 - sealed 1/2 ? (12.5 mm) square control *rohs directive 2002/95/ec jan 27, 2003 including annex. speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. electrical characteristics 1 conductive plastic cermet standard resistance range linear ...................................................................................................1 k ohms to 1 megohm ......................... 150 ohms to 1 megohm audio ....................................................................................................1 k ohms to 1 megohm ......................... 1 k ohms to 1 megohm total resistance tolerance linear tapers ........................................................................................?0 % or ?0 % ......... ........................... ?0 % or ? % audio tapers ........................................................................................?0 % or ?0 % .......... .......................... ?0 % independent linearity .................................................................................? % ................... ................................... ? % absolute minimum resistance ...................................................................2 ohms maximum ................. ................. 2 ohms maximum effective electrical angle ............................................................................270 ?? ?............. ................................. 270 ?? contact resistance variation .....................................................................2 % ......................... ............................... 2 % dielectric withstanding voltage (mil-std-202 ?method 301) sea level ..............................................................................................1,500 vac minimum .... .......................... 1,500 vac minimum 70,000 ..................................................................................................500 vac minimum ..... ............................ 500 vac minimum insulation resistance .................................................................................1,000 megohms minimum .. ................... 1,000 megohms minimum power rating at 70 ? (derate to 0 at 125 ?) (voltage limited by power dissipation or 350 vac, whichever is less) linear tapers ........................................................................................0.5 watt .................................................. 1.0 watt audio tapers ........................................................................................0.25 watt ................................................ 0.5 watt theoretical resolution ................................................................................essentially in nite .................................. essentially in nite environmental characteristics 1 operating temperature range ...................................................................+1 ? to +125 ? ............... .................... +1 ? to +125 ? storage temperature range ......................................................................-55 ? to +125 ? ............. ..................... -55 ? to +125 ? temperature coef cient over storage temperature range ......................?,000 ppm/? ...................................... ?50 ppm/? vibration (single section) ...........................................................................15 g .................... ................................... 15 g total resistance shift ...........................................................................? % maximum ............... ...................... ? % maximum voltage ratio shift ................................................................................? % maximum ............. ........................ ? % maximum shock (single section) ...............................................................................30 g .................... ................................... 30 g total resistance shift ...........................................................................+2 % maximum ............... ...................... ? % maximum voltage ratio shift ................................................................................? % maximum ............. ........................ ? % maximum load life .....................................................................................................1,000 hours .............. ............................. 1,000 hours total resistance shift ...........................................................................?0 % trs maximum .......... ................. ? % trs maximum rotational life (no load) ............................................................................50,000 cycles ........... ............................. 25,000 cycles total resistance shift ...........................................................................?0 % trs maximum .......... ................. ?0 % trs maximum contact resistance variation @ 25,000 cycles ...................................? % ......................................... ............. ? % moisture resistance (mil-std-202, method 103, condition b) total resistance shift ...........................................................................?0 % trs .................. .......................... ? % trs ip rating .....................................................................................................ip 64 .......... ............................................ ip 64 mechanical characteristics stop strength ................................................................................................................. .............................................................................. 56 n-cm (5 lb.-in.) mechanical angle .............................................................................................................. ........................................................................................ 290 ?? torque starting (dual sections) ............................................................................................................................... ............... +0.35 n-cm (+0.5 oz.-in.) maximum running (single section) ..................................................................................................... ........................................ 0.15 to 1.4 n-cm (0.2 to 2.0 oz.-in.) running (dual section) ....................................................................................................... ......................................... 0.35 to 1.8 n-cm (0.5 to 2.5 oz.-in.) mounting (torque on bushing) ................................................................................................. ......................... 1.7 to 2.0 n-m (15 to 18 lb.-in.) maximum weight (single section)........................................................................................................ ...................................................................................... 5.5 grams (additional section) ......................................................................................................... .................................................................................... 3.0 grams terminals ..................................................................................................................... .............................................................................. pc pin or solder lug soldering condition .................................................................. recommended hand soldering using sn95/ag 5 no clean solder, 0.025 ?wire diameter. maximum temperature 399 ? (750 ?) for 3 seconds. no wash process to be used with no clean ux. part can be wave soldered at 260 ? (500 ?) for 5 seconds, no wash process with no clean ux. marking .................................................................................................................. manufacturer s trademark, part number, resistance value and date code. ganging (multiple section potentiometer) ...................................................................................... ...................................................... 2 sections maximum** hardware ...........................................one lockwasher and one mounting nut is shipped with each potentiometer, exc ept where noted in the part number. 1 at room ambient: +25 ? nominal and 50 % relative humidity nominal, except as noted. ** additional sections available on special request with higher minimum order quantities. *rohs compliant
321 (single and dual module shown) package dimensions pcb mounting bracket package dimensions model 51 solder lug terminals model 53 electrical schematic 1 3 cw ccw 2 anti-rotation lug (style "a", 90 cw shown) 0.41 (.016) bushing diameter tolerance +0.80 ( +.031) 2.20 (.087) for tolerances shown: .xx = (.010) .xxx = (.005) shaft dimensions (1/32) 5.70 (.224) 132 5 ccw end 6.20 (.244) bushing diameter tolerance +0.80 ( +.031) 2.77 (.109) 6.35 (.250) shaft flat orientation suggested panel layouts the model 50 can be used with either of the two panel layouts shown below. 16.51 0.25 (.650 .010) 8.89 0.18 (.350 .007) .64 ( .025) "l" 0.30 (.0118) 5.08 0.30 (.200 .012) 7.62 0.30 (.300 .012) 12.5 (.492) 11.00 (.432) dia. 0.74 (.029) 6.25 (.246) 7.00 (.275) 6.60 0.38 (.260 .015) .66 .05 (.026 .002) 3 x 2.54 (.100) 2.54 (.100) .64 ( .025) "l" 5.08 0.30 (.200 .012) 0.91 .051 (.036 .002) 6.35 .25 (.250 .010) 7.62 0.30 (.300 .012) 1.32 0.25 (.052 .010) 12.5 (.492) 11.00 (.432) dia. 0.74 (.029) 6.25 (.246) 7.00 (.275) .41 .05 ( .016 .002) 2 x 2 x 5.08 (.200) 2.54 (.100) 5.08 (.200) 2.40 (.094) 0.90 (.036) 4.70 (.185) 2 x 1.80 (.071) 5.0 0.51 (.197 .020) 0.80 0.30 (.031 .012) 1.52 (.060) .25 .13 .80 (.100) terminal spacing 2.54 6.60 0.38 (.260 .015) (double module front and rear bracket shown) 1.32 (.052) fms c l of pot 2.54 (.100) typ. 1.27 (.050) dia. 4 plcs. 1.02 (.040) dia. 6 plcs. 6.35 (.250) 7.62 (.300) 5.08 (.200) speci? cations are subject to change without notice. customers should verify actual device performance in their speci? c applications. 51/53 - sealed 1/2 ? (12.5 mm) square control product dimensions dimensions: mm (inches)
opt. 3/8-32unef-2a 1/4-32unef-2a 3/8-32unef-2a m6 x .075-6g m7 x .075-6g m10 x 0.75-6g 9.53 (.375) 1.60 0.25 (.063 .010) opt. 1.194 0.10 (.047 .004) shaft 6.35 (.250) bushing 9.53 (.375) opt. 6.35 (.250) 0.79 0.25 (.031 .010) opt. 0.79 0.10 (.031 .004) shaft 3.18 (.125) bushing 6.35 (.250) opt. 9.53 (.375) 1.52 0.25 (.060 .010) opt. 5.49 0.10 (.216 .005) shaft 6.35 (.250) bushing 9.53 (.375) max. flat length 15.88 (.625) .315 (8.0) 1.52 0.25 (.060 .010) 0.79 0.10 (.031 .004) shaft 3.0 (.118) bushing 6.0 (2.36) 8.0 (.315) 1.52 0.25 (.060 .010) 0.79 0.10 (.031 .004) shaft 4.0 (.157) bushing 7.0 (2.75) 9.5 (.374) 1.80 0.25 (.071 .010) 1.00 0.10 (.039 .004) shaft 6.0 (.236) bushing 10.0 (.394) speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. 51/53 - sealed 1/2 ? (12.5 mm) square control shaft/bushing styles std. length ?l? .500 (12.7) .625 (15.88) .750 (19.05) .875 (22.23) 1.000 (25.4) a style bushing std. length ?l? .375 (9.53) .500 (12.7) .625 (15.88) .750 (19.05) .875 (22.23) 1.000 (25.4) c style bushing std. length ?l? .625 (15.88) .750 (19.05) .875 (22.23) 1.000 (25.4) a style bushing - flatted shaft std. length ?l? .394 (10.0) .512 (13.0) .630 (16.0) .866 (22.0) .984 (25.0) s style bushing std. length ?l? .394 (10.0) .512 (13.0) .630 (16.0) .866 (22.0) .984 (25.0) u style bushing std. length ?l? .512 (13.0) .630 (16.0) .866 (22.0) .984 (25.0) r style bushing dimensions: mm (inches) how to order 51 a a d - b 28 - a 15 l shaft available length only in (fms) bushing code description code 12 3/8 ? c 16 1/2 ? a, c 20 5/8 ? a, c 24 3/4 a, c 28 7/8 a, c 32 1 ? a, c metric 16 16 mm r, s, u 22 22 mm r, s, u 25 25 mm r, s, u element taper resistance type/tolerance (code) code description value in ohms (a) linear cermet 10 % (28) ? 150 (14) ? 7.5 k (h) linear cermet 5 % (06) ? 200 (15) 10 k (07) ? 250 (30) ? 15 k (08) ? 500 (16) ? 20 k (09) ? 750 (17) ? 25 k (10) 1 k (18) 50 k (29) ? 1.5 k (19) ? 75 k (11) ? 2 k (20) 100 k (12) ? 2.5 k (23) ? 500 k (13) 5 k (25) ? 1 m (b) linear c-p 20 % (10) 1 k (18) 50 k (e) linear c-p 10 % (12) ? 2.5 k (20) 100 k (13) 5 k (22) ? 250 k (15) 10 k (23) ? 500 k (16) ? 20 k (25) ? 1 m (17) ? 25 k (c) cw audio cermet (10) ? 1 k (18) ? 50 k 10 % (12) ? 2.5 k (20) ? 100 k (f) ccw audio cermet (13) ? 5 k (23) ? 500 k 10 % (15) ? 10 k (25) ? 1 m (17) ? 25 k (d) cw audio c-p 20 % (10) 1 k (18) 50 k (s) cw audio c-p 10 % (12) ? 2.5 k (20) 100 k (13) 5 k (22) ? 250 k (15) 10 k (23) ? 500 k (17) ? 25 k (25) ? 1 m (g) ccw audio c-p (10) ? 1 k (18) ? 50 k 20 % (12) ? 2.5 k (20) ? 100 k (t) ccw audio c-p (13) ? 5 k (22) ? 250 k 10 % (15) ? 10 k (23) ? 500 k (17) ? 25 k (25) ? 1 m (y) cw dual audio (10) ? 1 k (18) ? 50 k taper c-p 20 % (12) ? 2.5 k (20) ? 100 k (13) ? 5 k (22) ? 250 k (15) ? 10 k (23) ? 500 k (17) ? 25 k (25) ? 1 m model code 51 53 description pc pins (.100 centers) solder lugs bushing configuration code a c r s u description 3/8 d x 3/8 l 1/4 d x 1/4 l 10 mm d x 9.5 mm l 6 mm d x 8 mm l 7 mm d x 8 mm l mounting bracket/ anti-rotation lug code a d l m n description ar lug 90 cw no ar lug or bracket front bracket rear bracket front and rear bracket # sections/detents code a b e f description single no detent double no detent single w/center detent double w/center detent rohs identifier description compliant code l boldface features are bourns standard options. all others are available with higher minimum order quantities. available only in shaft type bushings lengths code description code description b single slotted 1/4 d a 24,28 c single flatted 1/4 ?d a 20,24,28,32 d single plain 1/8 ?d c 16,20,24,28 e single slotted 1/8 d c 12,16,20, 24,28 r single slotted 6 mmd r 16,22, 25 t single slotted 4 mmd u 16,22, 25 u single slotted 3 mmd s 16 ,22,25 rev. 09/11
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