Features n Single-turn (3851 and 3852) n 3-3/4-turn (3856) n Linear and audio tapers n Wide resistance range n Minimal depth package n Good resolution 3851/3852/3856 - 3/4 ” Diameter Panel Control In itial Electrical Characteristics1 3851 3852/3856 Conductive Plastic Element Cermet Element Standard Resistance Range Linear Tapers (A, B, E, and H) .....................1 K to 1 megohm ...............................................100 ohms to 1 megohm Audio Tapers (C, D, F, and G) ......................1 K to 1 megohm ...............................................1 K ohms to 1 megohm Total Resistance Tolerance ...............................±10 % or ±20 % ................................................±5 % or ±10 % Independent Linearity .......................................±10 % ................................................................(A & H tapers) ±5 % Absolute Minimum Resistance .........................2 ohms maximum .............................................. 2 ohms maximum Effective Electrical Angle ..................................(Linear tapers) 250 ° ±5 ° ...................................(Linear tapers) 250 ° ±5 ° (Audio tapers) 225 ° ±5 ° ...................................(Audio tapers) 225 ° ±5 ° Contact Resistance Variation ...........................±1 % ..................................................................±3 % of total resistance or 3 ohms (whichever is greater) Dielectric Withstanding Voltage (MIL-STD-202, Method 301) Sea Level ....................................................900 VAC minimum .............................................900 VAC minimum 70,000 Feet .................................................350 VAC minimum .............................................350 VAC minimum Insulation Resistance (500 VDC) ......................1,000 megohms minimum .................................1,000 megohms minimum Power Rating (Voltage Limited By Power Dissipation or 350 VAC, Whichever Is Less) +70 °C ........................................................(Linear tapers) 1 watt .........................................(Linear tapers) 2 watts (Audio tapers) 0.5 watt ......................................(Audio tapers) 1 watt +125 °C .......................................................0 watt +150 °C ..................................................................................................................................0 watt Theoretical Resolution ......................................Essentially infinite ..............................................Essentially infinite Environmental Characteristics1 Operating Temperature Range ..........................-1 °C to +125 °C ..................................................-1 °C to +125 °C Storage Temperature Range ..............................-65 °C to +125 °C ................................................-65 °C to +150 °C Temperature Coefficient Over Storage Temperature Range ............................±1,000 ppm/°C .....................................................±150 ppm/°C Vibration .............................................................20 G ......................................................................20 G Total Resistance Shift ...................................±2 % maximum ....................................................±2 % maximum Voltage Ratio Shift ........................................±5 % maximum ....................................................±6 % maximum Shock .................................................................100 G ....................................................................100 G Total Resistance Shift ...................................±2 % maximum ....................................................±2 % maximum Voltage Ratio Shift ........................................±5 % maximum ....................................................±6 % maximum Load Life ............................................................1,000 hours ..........................................................1,000 hours Total Resistance Shift ...................................±10 % maximum ..................................................±3 % maximum Rotational Life (No Load) ...................................100,000 cycles .....................................................20,000 cycles Total Resistance Shift ...................................±15 % TRS maximum .........................................±5 % or 5 ohms TRS whichever is greater Contact Resistance Variation .......................±3 % .....................................................................±3 % Moisture Resistance (MIL-STD-202, Method 103, Condition B) Total Resistance Shift ...................................±10 % maximum .................................................±2 % maximum IP Rating .............................................................IP 40 .....................................................................IP 40 1 At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted. WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov *RoHS Directive 2015/863, Mar 31, 2015 and Annex. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

3851/3852/3856 - 3/4 ” Diameter Panel Control Mechanical Characteristics1 Stop Strength 3851 & 3852 ..................................................................................................................................................................56.5 N-cm (5 lb.-in.) 3856 .....................................................................................................................................................................................Continuous turn Mechanical Angle .............................................................................................................................................280 ° ±5 ° / 3856 – 1350 ° ±50 ° Torque (Starting and Running) ......................................................................................A & B bushings 0.35 to 4.23 N-cm (0.05 to 6.0 oz.-in.) C & E bushings 0.21 to 4.23 N-cm (0.3 to 6.0 oz.-in.) 3856 – 0.11 to 2.12 N-cm (0.15 to 3.0 oz.-in.) Mounting (Torque on Bushing) ...........................................................................................................1.7-2.0 N-m (15-18 lb.-in.) maximum Weight (Single Section) .......................................................................................................................................................30 grams maximum Terminals ................................................................................................................................................Printed circuit terminals or solder lugs 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, wiring diagram, resistance, date code, and part number Ganging (Multiple Section Potentiometers) ..............................................................................................................................1 cup maximum Hardware ..................One lockwasher and one mounting nut is shipped with each potentiometer, except where noted in the part number. 1 At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

3851/3852/3856 - 3/4 ” Diameter Panel Control Product Dimensions (6..2355 ±± ..0736) (9..3583) (..03185) 1 3 42(/518.7 /-°2,3 ,X22 7 2 U/(.82.N.0)32 E15F0S)TD. (6..2355 ±± ..0736) (1.25.07) (..03185) 1 3(45/585./8-8 °38) 2 X S U T(N.D.02E.15F0) (6.2.355) TSYOPL.DER LUG TERMINAL3( 2.P1.L71C90S). CHAMFER CHAMFER 12.7 1 (D.97.I05A5). (.265.03+5.+0.0013//--..00052)D IA. 1(D.97I.5A0).5 (.265.03+5.+0.0013//--..00052)D IA. 14.02 ± .252 (P.5L0C)S. 1 2 3 EWTAHICLRLHE E AT C E( ..RC07O2M28M I )N MDAIOLA DMLAUETGTEER (1.428.109) DIA. (.S1.001.H614.3A697+F0 W.T+0 .1IS3D5L8E/O/- ..X0T0000)DEEP 1(.24.81)9 DIA. ((.0S1.106.H.1463A970+F )+. T0W. 31SI85DL//EO--.. 00TX000)DEEP (.552 ± .010) PRINTEDS CTIARNCDUAITR TDERMINA(S.LT7R24A NDDIAE.D A)W WGIRES. 5.49 16.00 6.35 1.02 (.216)OPTIONAL FLAT (.63) (.25) TYP. (.040) TYP. 1.52 28.58 LONG OR FRONT BUSHING FOR SHAFTS UNDER (.06) (1-1/8) 15.88 ± .38 (.625 ± .015) 6.35 1 2 3 (.25) 6.35 9 .(533/8, ,2 72/.82)3 STD. 9.53 (112/2.7) STD. 6.35 ± .76 (.25) 1/4-32 UNEF 6.35 ± .76 (.38) 1/4-32 UNEF SUGGESTED BOARD LAYOUT (.25 ± .03) (.0.3185) 45C H° AXM (F..0E21R50) (.25 ± .03) (.0.3185) 45C H° AXM (F..0E21R50) (6.2.355) (6.2.355) 2.36 19.05 (.094) 1(.97.055) (.10.5450) DIA. (.75) DIA. DIA. (1.428.109) DIA. (S..70H93A 1 FW)TI DSEL OX(T. 31 .(.27.105683 ± )±D .E00E.02P15) DIA. (1.428.109) DIA. (S..70H93A ) FWTI DSEL OXT (( ...3701.6321 158 ) ±±D E..00E02P15) DIA. A, B & H B(U9.3.S57H35I)NGS (9.3.5735) .25 OPTIONAL FLAT LONG OR (.010) 1.52 15.88 (.06) FRONT BUSHING FOR SHAFTS UNDER (5/8) (.93.9901) DIA. (.31.2158) DIA. (.62.6753) DIA. (3.1.1285)DIA. SHAFT SLOT FLAT 12.7 12.7 ALIGNMENT ALIGNMENT (.50) 9.53 (.50) AT CCW AT CCW 9.53 (.38) (.38) 6.35 ± .76 (..03185) (.265.03+5.+0.0013//--..00052) DIA. 6.35 ± .76 (..03185) 6(..3255+0. 0±3 ./0-3.0)5 DIA. 50 ° ± 10 ° 50 ° ± 10 ° (.25 ± .03) 3/8-32 UNEF (.25 ± .03) 3/8-32 UNEF. .79 1.19 (.047) (.031) 2.67 ± .381 19.05 19.05 (.105 ± .015) (.75) (.75) ANTI-ROTATION LUG DIA. DIA. PROJECTS 1/16 INCH (1.428.109) DIA. 45 ° X (..02150) (1.428.109) DIA. (.31.2158 ± ± ..00033) TOLERANCES EXCEPT AS NOTED: ABOVE MOUNTING FACE. 1.60+3.81/-.000 CHAMFER (.0.7391 ±± ..20510) DIA..25 DECIMALS: .XXX ± ( ..010257) ,.XX ± ( . 0.3185) (.063+.015/-.000) 22.23 45 ° X (.010) FRACTIONS: ± 1/64 DIA. (7/8) STD. CHAMFER ANGLE: ± 3 % 22.23 1 3 STD. (7/8) MM CCW DIMENSIONS: (INCHES) 2 POTENTIOMETER Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

3851/3852/3856 - 3/4 ” Diameter Panel Control How To Order 3852 A - 28 2 - 103 A L RESISTANCE RoHS IDENTIFIER SHAFT TYPE AVAILABLE ONLY IN CODE/VALUE L Compliant (FMS) & DIAMETER MODELS BUSHINGS (IN OHMS) 12 3/8 ” (9.53 mm) L X 1/8 ” (3.18 mm) D 3851, 3852 C Model 3851 16 1/2 ” (12.7 mm) L x 1/4 ” (6.35 mm) D 3851, 3852 A (102) 1 K 16 1/2 ” (12.7 mm) L x 1/8 ” (3.18 mm) D 3851, 3852 C, E (252) 2.5 K (502) 5 K 20 5/8 ” (15.88 mm) L X 1/4 ” (6.35 mm) D 3851, 3852 A, B (103) 10 K 28 7/8 ” (22.20 mm) L X 1/4 ” (6.35 mm) D 3851, 3852 A, B (253) 25 K 3856 A (503) 50 K 3851, 3852 C, E (104) 100 K 28 7/8 ” (22.20 mm) L X 1/8 ” (3.18 mm) D 3856 H (254) 250 K (504) 500 K (105) 1 M Consult factory for lengths not shown. Models 3852/3856 (101) 100 (251) 250 BUSHING APPLICABLE MODELS (501) 500 A Plain 3/8 ” (9.53 mm) D x 3/8 ” (9.53 mm) L 3851, 3852, 3856 (102) 1 K (252) 2.5 K B Locking 3/8 ” (9.53 mm) D x 1/2 ” (12.7 mm) L 3851, 3852 (502) 5 K C Plain 1/4 ” (6.35 mm) D x 1/4 ” (6.35 mm) L 3851, 3852 (103) 10 K E Locking 1/4 ” (6.35 mm) D x 1/2 ” (12.7 mm) L 3851, 3852 (253) 25 K (503) 50 K H Plain 3/8 ” (9.53 mm) D x 3/8 ” (9.53 mm) L 3856 (3.18 mm D Shaft) (104) 100 K (254) 250 K (504) 500 K (105) 1 M MODEL 33885512 33//44 ”” ((1199..0055 mmmm)) DD SSiinnggllee--TTuurrnn CC.ePr.met TE RMINAL STYLE AND T A P E ERL/ET M O LE E N RT A N CE A PMPOLDICEALBSLE 3856 3/4 ” (19.05 mm) D 3-3/4-Turn Cermet SHAFT TYPE A Linear ±10 % 3852, 3856 1 Solder Lugs, Plain End B Linear ±20 % 3851 Boldface features are Bourns standard options. 2 Solder Lugs, Slotted End C Audio CW ±10 % 3852, 3856 3 Solder Lugs, Flatted Shaft D Audio CW ±20 % 3851 All others are available with higher minimum order 5 PC Pins, Plain End E Linear ±10 % 3851 quantities. 6 PC Pins, Slotted End F Audio CCW ±10 % 3852, 3856 7 PC Pins, Flatted Shaft G Audio CCW ±20 % 3851 H Linear ±5 % 3852, 3856 REV. 03/19 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

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Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: B ourns: 3852A-162-502AL 3852A-282-502AL 3852A-282-503AL 3852A-162-252AL 3852C-282-104AL 3852A-283-251AL 3852C-282-252AL 3852A-162-254AL 3852A-166-251AL 3852A-286-102AL 3852A-206-502AL 3852C-282-952HL 3852C-166-103AL 3852A-282-253CL 3852A-245-252AL 3852A-283-113CL 3852C-282-254AL 3852C-282-251AL 3852C-162-103AL 3852A-166-252AL 3852C-202-103AL 3852A-282-254HL 3852A-202-503AL 3852C-283-253FL 3852A-286-253AL 3852A-282-251AL 3852A-166-254AL 3852C-202-102AL 3852C-126-153AL 3852A-252-252AL 3852C-162-503AL 3852A-202-252AL 3852C-162-502AL 3852C-202-101AL 3852A-282-151AL 3852A-162-253AL 3852C-202-104AL 3852A-162-251AL 3852C-122-252AL 3852C-122-254AL 3852C-282-101AL 3852A-206-103AL 3852C-166-253AL 3852C-162-104AL 3852A-286-503AL 3852A-286-254AL 3852A-282-254AL 3852A-282-352AL 3852A-202-102AL 3852C-122-253AL 3852A-166-103AL 3852A-202-103AL 3852A-286-251AL 3852A-286-252AL 3852A-162-104AL 3852A-206-102AL 3852A-282-202AL 3852A-286-103AL 3852C-202-502AL 3852C-282-102AL 3852C-282-103AL 3852C-282-502AL 3852C-282-503AL 3852C-287-253FL 3852A-282-253A 3852A-282-252A 3852A-162-503AL 3852A-282-252AL 3852A-162-103AL 3852A-282-103AL 3852A-282-253AL 3852A-282-104AL 3852A-282-102AL