51AAA-B24-B20L - BOURNS - Product.Network

Features

■ 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

Linear ...................................................................................................1 K ohms to 1 megohm ......................... 150 ohms to 1 megohm

Audio ....................................................................................................1 K ohms to 1 megohm ......................... 1 K ohms to 1 megohm

Total Resistance Tolerance

Linear Tapers ........................................................................................±10 % or ±20 % .................................... ±10 % or ±5 %

Audio Tapers ........................................................................................±10 % or ±20 % .................................... ±10 %

Independent Linearity .................................................................................±5 % ...................................................... ±5 %

Absolute Minimum Resistance ...................................................................2 ohms maximum .................................. 2 ohms maximum

Effective Electrical Angle ............................................................................270 ° ±5 ° .............................................. 270 ° ±5 °

Contact Resistance Variation .....................................................................2 % ........................................................ 2 %

Dielectric Withstanding Voltage (MIL-STD-202 – Method 301)

Sea Level ..............................................................................................1,500 VAC minimum .............................. 1,500 VAC minimum

70,000 ..................................................................................................500 VAC minimum ................................. 500 VAC minimum

Insulation Resistance .................................................................................1,000 megohms minimum ..................... 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 .................................................. 1.0 watt

Audio Tapers ........................................................................................0.25 watt ................................................ 0.5 watt

Theoretical Resolution ................................................................................Essentially inﬁ nite .................................. Essentially inﬁ nite

Environmental Characteristics1

Operating Temperature Range ...................................................................+1 °C to +125 °C ................................... +1 °C to +125 °C

Storage Temperature Range ......................................................................-55 °C to +125 °C .................................. -55 °C to +125 °C

Temperature Coefﬁ cient Over Storage Temperature Range ......................±1,000 ppm/°C ...................................... ±150 ppm/°C

Vibration (Single Section) ...........................................................................15 G ....................................................... 15 G

Total Resistance Shift ...........................................................................±2 % maximum ..................................... ±2 % maximum

Voltage Ratio Shift ................................................................................±5 % maximum ..................................... ±5 % maximum

Shock (Single Section) ...............................................................................30 G ....................................................... 30 G

Total Resistance Shift ...........................................................................+2 % maximum ..................................... ±2 % maximum

Voltage Ratio Shift ................................................................................±5 % maximum ..................................... ±5 % maximum

Load Life .....................................................................................................1,000 hours ........................................... 1,000 hours

Total Resistance Shift ...........................................................................±10 % TRS maximum ........................... ±5 % TRS maximum

Rotational Life (No Load) ............................................................................50,000 cycles ........................................ 25,000 cycles

Total Resistance Shift ...........................................................................±10 % TRS maximum ........................... ±10 % TRS maximum

Contact Resistance Variation @ 25,000 Cycles ...................................±2 % ...................................................... ±4 %

Moisture Resistance (MIL-STD-202, Method 103, Condition B)

Total Resistance Shift ...........................................................................±10 % TRS ............................................ ±5 % TRS

IP Rating .....................................................................................................IP 64 ...................................................... IP 64

Mechanical Characteristics

Stop Strength ............................................................................................................................................................................................... 56 N-cm (5 lb.-in.)

Mechanical Angle ...................................................................................................................................................................................................... 290 ° ±5 °

Torque

Starting (Dual Sections) .............................................................................................................................................. +0.35 N-cm (+0.5 oz.-in.) maximum

Running (Single Section) ............................................................................................................................................. 0.15 to 1.4 N-cm (0.2 to 2.0 oz.-in.)

Running (Dual Section) ................................................................................................................................................0.35 to 1.8 N-cm (0.5 to 2.5 oz.-in.)

Mounting (Torque on Bushing) .......................................................................................................................... 1.7 to 2.0 N-m (15 to 18 lb.-in.) maximum

Weight (Single Section).............................................................................................................................................................................................. 5.5 grams

(Additional Section) ............................................................................................................................................................................................. 3.0 grams

Terminals ................................................................................................................................................................................................... PC pin or solder lug

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 ﬂ ux.

Part can be wave soldered at 260 °C (500 °F) for 5 seconds, no wash process with no clean ﬂ ux.

Marking .................................................................................................................. Manufacturer’s trademark, part number, resistance value and date code.

Ganging (Multiple Section Potentiometer) ............................................................................................................................................ 2 sections maximum**

Hardware ...........................................One lockwasher and one mounting nut is shipped with each potentiometer, except where noted in the part number.

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

321

(SINGLE AND DUAL MODULE SHOWN)

PACKAGE DIMENSIONS PCB MOUNTING BRACKET

PACKAGE DIMENSIONS

MODEL 51

SOLDER LUG TERMINALS

MODEL 53

ELECTRICAL SCHEMATIC

13CW

CCW

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

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 SPACING

2.54

6.60 ±0.38

(.260 ± .015)

(DOUBLE MODULE FRONT AND REAR BRACKET SHOWN)

1.32

(.052)

FMS

LOF 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)

SHAFT

3.0

(.118) BUSHING

6.0

(2.36)

8.0

(.315) 1.52 ± 0.25

(.060 ± .010)

0.79 ± 0.10

(.031 ± .004)

SHAFT

4.0

(.157) BUSHING

7.0

(2.75)

9.5

(.374) 1.80 ± 0.25

(.071 ± .010)

1.00 ± 0.10

(.039 ± .004)

SHAFT

6.0

(.236) BUSHING

10.0

(.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

51 A A D - B 28 - A 15 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

(07) — 250 (30) — 15 K

(08) — 500 (16) — 20 K

(09) — 750 (17) — 25 K

(10) — 1 K (18) — 50 K

(29) — 1.5 K (19) — 75 K

(11) — 2 K (20) — 100 K

(12) — 2.5 K (23) — 500 K

(13) — 5 K (25) — 1 M

(B) Linear C-P ±20 % (10) — 1 K (18) — 50 K

(E) Linear C-P ±10 % (12) — 2.5 K (20) — 100 K

(13) — 5 K (22) — 250 K

(15) — 10 K (23) — 500 K

(16) — 20 K (25) — 1 M

(17) — 25 K

±10 % (12) — 2.5 K (20) — 100 K

(F) CCW Audio Cermet (13) — 5 K (23) — 500 K

±10 % (15) — 10 K (25) — 1 M

(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

(13) — 5 K (22) — 250 K

(15) — 10 K (23) — 500 K

(17) — 25 K (25) — 1 M

(G) CCW Audio C-P (10) — 1 K (18) — 50 K

±20 % (12) — 2.5 K (20) — 100 K

(T) CCW Audio C-P (13) — 5 K (22) — 250 K

±10 % (15) — 10 K (23) — 500 K

(17) — 25 K (25) — 1 M

(Y) CW Dual Audio (10) — 1 K (18) — 50 K

Taper C-P ±20 % (12) — 2.5 K (20) — 100 K

(13) — 5 K (22) — 250 K

(15) — 10 K (23) — 500 K

(17) — 25 K (25) — 1 M

MODEL

Code

Description

PC Pins (.100 ” centers)

Solder Lugs

BUSHING CONFIGURATION

Code

Description

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

Description

AR Lug 90 °CW

No AR Lug or Bracket

Front Bracket

Rear Bracket

Front and Rear Bracket

# SECTIONS/DETENTS

Code

Description

Single No Detent

Double No Detent

Single w/Center Detent

Double w/Center Detent

RoHS IDENTIFIER

Description

Compliant

Code

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