PL IA NT CO M *R oH S Features Applications RoHS compliant* Test and measurement equipment CW or CCW rotary switch Avionics controls Linear and audio tapers Communications equipment PC board and bushing mount Medical laboratory equipment Splash seal Metal bushing and shaft 56 - Sealed 1/2 " (12.5 mm) Panel Control w/Rotary Switch Electrical Characteristics1 Standard Resistance Range Linear ......................................................................................................................................................................................................1K to 500K ohms Audio .......................................................................................................................................................................................................1K to 500K ohms Total Resistance Tolerance B & D Tapers ............................................................................................................................................................................................................ 20 % E & S Tapers ............................................................................................................................................................................................................. 10 % Independent Linearity ....................................................................................................................................................................................................... 5 % Absolute Minimum Resistance ..................................................................................................................................................................... 2 ohms maximum Effective Electrical Angle ............................................................................................................................................................................................. 240 5 Contact Resistance Variation ........................................................................................................................................................................................... 2 % 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 C (Derate To 0 At 125 C) (Voltage Limited By Power Dissipation or 350 VAC, Whichever Is Less) Linear Tapers ..........................................................................................................................................................................................................0.5 watt Audio Tapers ........................................................................................................................................................................................................0.25 watt Theoretical Resolution .................................................................................................................................................................................. Essentially infinite Environmental Characteristics1 Operating Temperature Range ...................................................................................................................................................................... +1 C to +125 C Storage Temperature Range ........................................................................................................................................................................-55 C to +125 C Temperature Coefficient Over Storage Temperature Range ............................................................................................................................ 1,000 ppm/C Vibration .............................................................................................................................................................................................................................. 8 G Total Resistance Shift ................................................................................................................................................................................ 2 % maximum Voltage Ratio Shift ..................................................................................................................................................................................... 5 % maximum Shock ................................................................................................................................................................................................................................ 20 G Total Resistance Shift ................................................................................................................................................................................ +2 % maximum Voltage Ratio Shift ..................................................................................................................................................................................... 5 % maximum Load Life.................................................................................................................................................................................................................1,000 hours Total Resistance Shift ...................................................................................................................................................................... 10 % TRS maximum Rotational Life (No Load) .....................................................................................................................................................................................50,000 cycles Total Resistance Shift ...................................................................................................................................................................... 10 % TRS maximum Contact Resistance Variation ..................................................................................................................................................................................... 2 % Moisture Resistance (MIL-STD-202, Method 103, Condition B) B & E Taper....................................................................................................................................................................................................... 10 % TRS D & S Taper ...................................................................................................................................................................................................... 20 % TRS IP Rating Entire Unit................................................................................................................................................................................................................... IP 64 Shaft/Bushing............................................................................................................................................................................................................. IP 65 Mechanical Characteristics Stop Strength ............................................................................................................................................................................................... 56 N-cm (5 lb.-in.) Mechanical Angle ...................................................................................................................................................................................................... 290 5 Torque Running/Starting ........................................................................................................................................................ 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.) maximum Weight ....................................................................................................................................................................................................................... 8.5 grams Terminals ........................................................................................................................................................................................................................ PC pin Soldering Condition .................................................................. Recommended hand soldering using Sn95/Ag5 no clean solder, 0.025 " wire diameter. Maximum temperature 399 C (750 F) for 3 seconds. No wash process to be used with no clean flux. Part can be wave soldered at 260 C (500 F) for 5 seconds, no wash process with no clean flux. Marking.................................................................................................................. Manufacturer's trademark, part number, resistance value and date code. Ganging (Multiple Section Potentiometers) .................................................................................... Inquire for availability, minimum order quantity and price. Hardware ...........................................................................................................One lockwasher and one mounting nut is shipped with each potentiometer. 1At room ambient: +25 C nominal and 50 % relative humidity nominal, except as noted. *RoHS Directive 2002/95/EC Jan 27, 2003 including Annex. Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. 56 - Sealed 1/2 " (12.5 mm) Panel Control w/Rotary Switch Initial Electrical Characteristics - Switch Switch Type ......................................................................................................................................................................SPDT (Break before make) Power Rating (Resistive Load) ..........................................................................................................................................................0.5 A @ 30 VDC Dielectric Withstanding Voltage (MIL-STD-202, Method 301) Sea Level ................................................................................................................................................................................. 1000 VAC minimum Insulation Resistance ........................................................................................................................................................ 1000 megohms minimum Contact Resistance ............................................................................................................................................................... 30 milliohms maximum Contact Bounce ................................................................................................................................................................. 5 milliseconds maximum Actuation Angle ................................................................................................................................................................................... 35 maximum Switch Travel ....................................................................................................................................................................................... 25 maximum Detent Torque ...............................................................................................................................................................1.3 N-cm (2.0 oz.-in) nominal Environmental Characteristics1 Vibration ............................................................................................................................................................................................................... 8 G Contact Resistance ............................................................................................................................................................ 30 milliohms maximum Contact Bounce ............................................................................................................................................................ 0.1 milliseconds maximum Shock ................................................................................................................................................................................................................. 20 G Contact Resistance ............................................................................................................................................................ 30 milliohms maximum Contact Bounce ............................................................................................................................................................ 0.1 milliseconds maximum Rotational Life @ Rated Power ............................................................................................................................................................. 50,000 cycles Contact Resistance .......................................................................................................................................................... 100 milliohms maximum Moisture Resistance (MIL-STD-202, Method 103, Condition B) Contact Resistance ............................................................................................................................................................ 30 milliohms maximum Insulation Resistance (After 24 Hours @ Room Temperature - 500 VDC) ........................................................................ 100 megohms minimum 1At room ambient: +25 C nominal and 50 % relative humidity nominal, except as noted. Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. 56 - Sealed 1/2 " (12.5 mm) Panel Control w/Rotary Switch Product Dimensions Recommended PCB Layout 16.51 0.25 (.650 .010) FMS 7.62 (.300) 8.89 0.18 (.350 .007) .64 "L" ( .025) 12.5 (.492) 6.35 (.250) 6.25 (.246) 11.00 DIA. (.432) 7.00 (.275) 0.74 (.029) 5.08 (.200) 1.32 (.052) TYP. 2.54 (.100) CL OF POT 0.30 (.0118) 5.08 0.30 (.200 .012) 6.35 0.25 (.250 .010) 2.54 (.100) 2.54 (.100) .66 .05 3X (.026 .002) 7.62 0.30 (.300 .012) 2.54 ( .100)TERMINAL SPACING 1.27 (.050) DIA. 4 PLCS. 1.02 (.040) DIA. 6 PLCS. (Double Module Front and Rear Bracket Shown) Suggested Panel Layouts 6.20 (.244) PACKAGE DIMENSIONS W/PCB MOUNTING BRACKET 16.51 0.25 (.650 .010) "L" 12.5 (.492) .64 ( .025) 11.00 DIA. (.432) 7.00 (.275) 0.74 (.029) 0.91 .051 (.036 .002) 6.35 0.25 (.250 .010) 6.25 (.246) 6.35 (.250) 2.77 (.109) 2.20 (.087) BUSHING DIAMETER 0.80 ( .031) BUSHING DIAMETER 0.80 ( .031) The Model 56 can be used with either of the two panel layouts shown. 1.32 0.25 (.052 .010) 2X 5.08 0.30 (.200 .012) 6.35 0.25 (.250 .010) .41 .05 ( .016 .002) 5.08 (.200) 5.08 (.200) 7.62 0.30 (.300 .012) 2X 2.54 (.100) Electrical Schematic CCW 3 1 CW 2 Switch Configuration ANTI-ROTATION LUG (Style "A", 90 CW Shown) 0.80 0.30 (.031 .012) 0.41 (.016) 1' CCW 5.70 (.224) 2' 3' CW 1.52 (.060) SPDT 132 5 CCW END Terminal Layout 1' 1 SHAFT FLAT ORIENTATION 2' .25 FOR TOLERANCES SHOWN: .XX = (.010) .XXX = .13 (.005) SHAFT DIMENSIONS .80 (1/32) DIMENSIONS: Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. MM (INCHES) 3' 3 2 56 - Sealed 1/2 " (12.5 mm) Panel Control w/Rotary Switch Shaft/Bushing Styles 9.53 (.375) How To Order 56 6.35 9.53 SHAFT BUSHING (.250) (.375) D - C 28 - B 15 / R81 L RoHS IDENTIFIER Code Description L Compliant ANTI-ROTATION LUG / BRACKET OPTION Code Description AR Lug 90 CW A No AR Lug or Bracket D Front Bracket L Front and Rear Bracket N A Style Bushing STD. LENGTH `L' .750 (19.05) .875 (22.23) SWITCH OPTION Code Description R80 SPDT CW R81 SPDT CCW NO. OF SECTIONS Code Description A Single plus Switch RESISTANCE CODES Code Value in Ohms 10 1K 13 5K 15 10K 18 50K 20 100K 22 250K 23 500K 0.79 0.25 OPT. (.031 .010) 0.79 0.10 OPT. (.031 .004) 1/4-32UNEF-2A 3.18 6.35 SHAFT BUSHING (.125) (.250) MAX. FLAT LENGTH 1.52 0.25 OPT. (.060 .010) BUSHING DESIGNATOR Code Description 3/8 " D x 3/8 " L Threaded A 1/4 " D x 1/4 " L Threaded C MODEL Code Description 56 PC Terminals w/Rotary Switch C Style Bushing STD. LENGTH `L' .750 (19.05) .875 (22.23) 9.53 (.375) A 1.194 0.10 OPT. (.047 .004) 3/8-32UNEF-2A 6.35 (.250) A 1.60 0.25 OPT. (.063 .010) ELEMENT TAPER TYPE/TOLERANCE Code Description Linear CP 20 % B Linear CP 10 % E CW Audio CP 20 % D CW Audio CP 10 % S 15.88 (.625) SHAFT LENGTH DESIGNATOR Code Description 24 3/4 " FMS Long 28 7/8 " FMS Long 5.49 0.10 OPT. (.216 .005) 3/8-32UNEF-2A 6.35 9.53 SHAFT BUSHING (.250) (.375) A Style Bushing Flatted Shaft Boldface features are Bourns standard options. All others are available with higher minimum order quantities. Code B C E SHAFT STYLE Description 1/4 " D Slotted End 1/4 " D Flatted End 1/8 " D Slotted End AVAILABLE ONLY WITH BUSHING Code A A C STD. LENGTH `L' .750 (19.05) .875 (22.23) DIMENSIONS: MM (INCHES) Asia-Pacific: 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 08/11 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.