51UBA-B28-A15L

51AAD-B28-A15L BOURNS | Alldatasheet

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■ 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. Specifi cations are subject to change without notice. Customers should verify actual device performance in their specifi c applications. Electrical Characteristics1 Conductive Plastic Cermet Standard Resistance Range Total Resistance Tolerance Dielectric Withstanding Voltage (MIL-STD-202 – Method 301) Power Rating At 70 °C (Derate To 0 At 125 °C) (Voltage Limited By Power Dissipation or 350 VAC, Whichever Is Less) Environmental Characteristics1 Moisture Resistance (MIL-STD-202, Method 103, Condition B) Mechanical Characteristics Torque Maximum temperature 399 °C (750 °F) for 3 seconds. No wash process to be used with no clean fl ux. Part can be wave soldered at 260 °C (500 °F) for 5 seconds, no wash process with no clean fl ux. 1At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted. ** Additional sections available on special request with higher minimum order quantities. *RoHS COMPLIANT

(SINGLE AND DUAL MODULE SHOWN) PACKAGE DIMENSIONS PCB MOUNTING BRACKET PACKAGE DIMENSIONS MODEL 51 SOLDER LUG TERMINALS MODEL 53 ELECTRICAL SCHEMATIC 1 3 CWCCW 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 SPACING2.54 6.60 ±0.38 (.260 ± .015) (DOUBLE MODULE FRONT AND REAR BRACKET SHOWN) 1.32 (.052) FMS CL 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) Specifi cations are subject to change without notice. Customers should verify actual device performance in their specifi 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) SHAFT3.0 (.118) BUSHING6.0 (2.36) 8.0 (.315) 1.52 ± 0.25 (.060 ± .010) 0.79 ± 0.10 (.031 ± .004) SHAFT4.0 (.157) BUSHING7.0 (2.75) 9.5 (.374) 1.80 ± 0.25 (.071 ± .010) 1.00 ± 0.10 (.039 ± .004) SHAFT6.0 (.236) BUSHING10.0 (.394) Specifi cations are subject to change without notice. Customers should verify actual device performance in their specifi 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 5 1 A A D - B 2 8 - A 1 5 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 (B) Linear C-P ±20 % (10) — 1 K (18) — 50 K (15) — 10 K (23) — 500 K (17) — 25 K (C) CW Audio Cermet (10) — 1 K (18) — 50 K (F) CCW Audio Cermet (13) — 5 K (23) — 500 K (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 (15) — 10 K (23) — 500 K (G) CCW Audio C-P (10) — 1 K (18) — 50 K (T) CCW Audio C-P (13) — 5 K (22) — 250 K (Y) CW Dual Audio (10) — 1 K (18) — 50 K Taper C-P ±20 % (12) — 2.5 K (20) — 100 K (15) — 10 K (23) — 500 K MODEL Code

Description

PC Pins (.100 ” centers) Solder Lugs BUSHING CONFIGURATION Code A C R S U 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 AR Lug 90 °CW No AR Lug or Bracket Front Bracket Rear Bracket Front and Rear Bracket # SECTIONS/DETENTS Code A B E F 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