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.