features rohs compliant* push-pull switch linear and audio tapers pc board and bushing mount splash seal metal bushing and shaft applications test and measurement equipment communications equipment medical diagnostic equipment professional audio equipment 54 - 1/2 ? (12.5 mm) panel control w/push-pull switch *rohs directive 2002/95/ec jan. 27, 2003 including annex and rohs recast 2011/65/eu june 8, 2011. speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. electrical characteristics 1 standard resistance range linear ....................................................................................................................... ................................................................. 1k to 500k ohms audio ........................................................................................................................ ................................................................ 1k to 500k ohms total resistance tolerance b & d tapers ............................................................................................................................... ............................................................... ?0 % e & s tapers ................................................................................................................. ............................................................................. ?0 % independent linearity ......................................................................................................... ............................................................................... ? % absolute minimum resistance ................................................................................................... ................................................... 2 ohms maximum effective electrical angle .................................................................................................... .......................................................................... 270 ?? contact resistance variation .................................................................................................. .......................................................................... ? % dielectric withstanding voltage (mil-std-202 ?method 301) sea level .................................................................................................................... .........................................................1,500 vac minimum 70,000 ....................................................................................................................... ..............................................................500 vac minimum insulation resistance ......................................................................................................... .............................................. 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 audio tapers ................................................................................................................. ......................................................................... 0.25 watt theoretical resolution ........................................................................................................ ........................................................... essentially in nite environmental characteristics 1 operating temperature range ................................................................................................... .................................................... +1 ? to +125 ? storage temperature range ..................................................................................................... .................................................... -55 ? to +125 ? temperature coef cient over storage temperature range ........................................................................ ......................................?,000 ppm/? vibration ..................................................................................................................... ..........................................................................................8 g total resistance shift ....................................................................................................... ...........................................................? % maximum voltage ratio shift .......................................................................................................... .............................................................? % maximum shock.......................................................................................................................... ........................................................................................20 g total resistance shift ....................................................................................................... ...........................................................+2 % maximum voltage ratio shift .......................................................................................................... .............................................................? % maximum load life ..................................................................................................................... .............................................................................1,000 hours total resistance shift ....................................................................................................... .................................................?0 % trs maximum rotational life (no load)...................................................................................................... ................................................................50,000 cycles total resistance shift ....................................................................................................... .................................................?0 % trs maximum contact resistance variation ............................................................................................................................... ........................................ ? % moisture resistance (mil-std-202, method 103, condition b) b & e ........................................................................................................................ ......................................................................... ?0 % trs d & s ........................................................................................................................ ......................................................................... ?0 % trs ip rating entire unit .................................................................................................................. ................................................................................... ip64 shaft/bushing ................................................................................................................ ............................................................................... ip65 mechanical characteristics stop strength.................................................................................................................. ......................................................... 39.5 n-cm (3.5 lb.-in.) mechanical angle .............................................................................................................. ......................................................................... 290 ?? torque starting/running ............................................................................................................ .............................. 0.2 to 1.3 n-cm (0.25 to 2.0 oz.-in.) mounting (torque on bushing) ................................................................................................. ........................... 1.7 to 2.0 n-m (15 to 18 lb.-in.) weight ........................................................................................................................ ................................................................................. 10 grams terminals ..................................................................................................................... ............................................................... pc pin or solder lug soldering condition .....................................................recommended hand soldering using sn95/ag5 no clean so lder, 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? trad emark, part number, resistance value and date code. ganging (multiple section potentiometers) ...................................................................... inquire for ava ilability, minimum order quantity and price. hardware ............................................................................................. one lockwasher and one mo unting nut is shipped with each potentiometer. 1 at room ambient: +25 ? nominal and 50 % relative humidity nominal, except as noted. *rohs compliant
54 - 1/2 ? (12.5 mm) panel control w/push-pull switch initial electrical characteristics - switch switch type ................................................................................................................... ..................................................dpdt (break before make) power rating (resistive load) ................................................................................................. ...................................................... 0.25 a @ 30 vdc dielectric withstanding voltage (mil-std-202, method 301) sea level .................................................................................................................... ..............................................................1000 vac minimum insulation resistance ......................................................................................................... ................................................1500 megohms minimum contact resistance ............................................................................................................ ..................................................100 milliohms maximum actuating stroke .............................................................................................................. ...............................................0.41 cm (0.16 in.) maximum environmental characteristics 1 vibration ..................................................................................................................... ...........................................................................................8 g contact resistance ............................................................................................................................... .............................100 milliohms maximum contact bounce ............................................................................................................... .............................................. 0.1 milliseconds maximum shock.......................................................................................................................... .........................................................................................20 g contact resistance ............................................................................................................................... .............................100 milliohms maximum contact bounce ............................................................................................................... .............................................. 0.1 milliseconds maximum switch life @ rated power ..................................................................................................... .......................................................15,000 actuations switch actuating force ....................................................................................................... ..............................................0.45 kg (1.0 lb) minimum contact resistance ............................................................................................................................... .............................100 milliohms maximum moisture resistance (mil-std-202, method 103, condition b) contact resistance ............................................................................................................................... .............................100 milliohms maximum insulation resistance (after 24 hours @ room temperature - 500 vdc) .......................................................... ..............100 megohms minimum 1 at room ambient: +25 ? nominal and 50 % relative humidity nominal, except as noted. switch con gurations (shown in pulled position) pulled pushed dpst nc/no dpst no/no dpdt spst no dpst nc/nc spdt a a a a b b b b b b c c c c d d e e e e f f f speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications.
package dimensions with front and rear pcb mounting bracket suggested pcb layout suggested pcb layout 1 3 cw ccw 2 (style "a", 90 cw shown) 0.41 (.016) bushing diameter 0.80 ( .031) 2.20 (.087) for tolerances shown: .xx = ? (.010) .xxx = (.005) shaft dimensions (1/32) 5.70 (.224) 6.20 (.244) bushing diameter 0.80 ( .031) 2.77 (.109) 6.35 (.250) the model 54 can be used with either of the two panel layouts shown below. 12.5 (.492) 6.25 (.246) 6.99 (.275) 6.35 ?0.25 (.250 ?.010) 6.35 ?0.25 (.250 ?.010) 0.66 ?0.05 (.026 ?.002) 3 plcs. 2.54 (.100) shaft flat shown at 50 % of mechanical travel. 2.54 (.100) 0.41 ?0.05 (.016 ?.002) 2 plcs. terminal spacing 2 plcs. 5.08 (.200) 5.08 (.200) 2.54 (.100) 0.80 ?0.30 (.031 ?.012) 1.52 (.060) .25 .13 .80 0.76 (.030) 9 plcs. mounting surface 3.3 - 4.7 (.130 - .185) switch actuation travel 0.64 ?0.05 (.025 ?.002) 6 plcs. 0.3 (.012) 2.54 (.100) 2.54 (.100) 5.08 ?0.3 (.200 ?.012) 5.08 ?0.3 (.200 ?.012) 11.9 ?0.3 (.469 ?.012) 5.08 ?0.3 (.200 ?.012) 15.24 ?0.25 (.600 ?.010) switch module 8.89 ?0.17 (.350 ?.007) primary unit l (see shaft/ bushing styles) 1 2 a b c 3 d e f b (see shaft/ bushing styles) 5.08 (.200) 5.08 (.200) 5.08 (.200) 11.9 (.469) mounting surface 0.76 (.030) 9 plcs. 1.02 (.040) 4 plcs. mounting surface 2.54 (.100) 2.54 (.100) 1.32 (.052) 5.08 (.200) 5.08 (.200) 5.08 (.200) 5.08 (.200) 11.9 (.469) 5.08 (.200) 24.13 ?0.53 (.950 ?.021) 1.32 ?0.25 (.052 ?.010) 2 plcs. 0.64 ?0.05 (.025 ?.002) 6 plcs. 0.91 ?0.05 (.036 ?.002) 2 plcs. 0.3 (.012) 5.08 ?0.3 (.200 ?.012) 5.08 ?0.3 (.200 ?.012) 11.9 ?0.3 (.469 ?.012) 5.08 ?0.3 (.200 ?.012) 28.37 (1.117) speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. 54 - 1/2 ? (12.5 mm) panel control w/push-pull switch product dimensions dimensions: mm (inches) suggested panel layouts electrical schematic anti-rotation lug terminal layout
opt. 3/8-32unef-2a 9.53 (.375) 1.60 0.25 (.063 .010) opt. 1.194 0.10 (.047 .004) shaft 6.35 (.250) bushing 9.53 (.375) speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. 54 - 1/2 ? (12.5 mm) panel control w/push-pull switch std. length ?l? .750 (19.05) .875 (22.23) a style bushing c style bushing a style bushing - flatted shaft dimensions: mm (inches) how to order rev. 03/12 shaft/bushing styles 1/4-32unef-2a 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) 3/8-32unef-2a 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) asia-paci c: tel: +886-2 2562-4117 ?fax: +886-2 2562-4116 europe: tel: +41-41 768 5555 ?fax: +41-41 768 5510 the americas: tel: +1-951 781-5500 ?fax: +1-951 781-5700 www.bourns.com 54 a a d - c 28 - b 15 / p50 l model code 54 description pc terminals w/push-pull switch bushing designator code a c description 3/8 ? d x 3/8 ? l threaded 1/4 ? d x 1/4 ? l threaded switch option code p50 description dpdt shaft length designator code 24 28 description 3/4 ? fms long 7/8 ? fms long resistance codes code 10 13 15 18 20 22 23 value in ohms 1k 5k 10k 50k 100k 250k 500k element taper type/tolerance code b e d s description linear cp 20 % linear cp 10 % cw audio cp 20 % cw audio cp 10 % anti-rotation lug / bracket option code a d l n description ar lug 90 cw no ar lug or bracket front bracket front and rear bracket no. of sections code a description single plus switch rohs identifier description compliant code l boldface features are bourns standard options. all others are available with higher minimum order quantities. available only with shaft style bushing code description code b 1/4 ? d slotted end a c 1/4 ? d flatted end a e 1/8 ? d slotted end c std. length ?l? .750 (19.05) .875 (22.23) std. length ?l? .750 (19.05) .875 (22.23)
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