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Features

■

RoHS compliant*

■

Push-pull switch

■

Linear and audio tapers

■

PC board and bushing mount

■

Splash seal

■

Metal bushing and shaft

Applications

■

Test and measurement equipment

■

Communications equipment

■

Medical diagnostic equipment

■

Professional audio equipment

54 - 1/2 ” (12.5 mm) Panel Control w/Push-Pull Switch

Electrical Characteristics

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 .............................................................................................................................................................................. 270 ° ±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 Characteristics

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

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

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

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

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

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

B & E ..................................................................................................................................................................................................±10 % TRS

D & S..................................................................................................................................................................................................±20 % TRS

IP Rating

Entire Unit .................................................................................................................................................................................................... IP 64

Shaft/Bushing .............................................................................................................................................................................................. IP 65

Mechanical Characteristics

Stop Strength .......................................................................................................................................................................... 39.5 N-cm (3.5 lb.-in.)

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

Torque

Starting/Running ..........................................................................................................................................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.)

Weight .........................................................................................................................................................................................................10 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 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.

54 - 1/2 ” (12.5 mm) Panel Control w/Push-Pull Switch

Initial Electrical Characteristics - Switch

Switch Type ..................................................................................................................................................................... DPDT (Break before make)

Power Rating (Resistive Load) ........................................................................................................................................................0.25 A @ 30 VDC

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

Insulation Resistance ........................................................................................................................................................ 1500 megohms minimum

Contact Resistance ............................................................................................................................................................. 100 milliohms maximum

Actuating Stroke .............................................................................................................................................................0.41 cm (0.16 in.) maximum

Environmental Characteristics

Contact Resistance .......................................................................................................................................................... 100 milliohms maximum

Contact Bounce ............................................................................................................................................................ 0.1 milliseconds maximum

Contact Resistance .......................................................................................................................................................... 100 milliohms maximum

Contact Bounce ............................................................................................................................................................ 0.1 milliseconds maximum

Switch Life @ Rated Power ........................................................................................................................................................... 15,000 actuations

Switch Actuating Force ....................................................................................................................................................0.45 kg (1.0 lb) minimum

Contact Resistance .......................................................................................................................................................... 100 milliohms maximum

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

Contact Resistance .......................................................................................................................................................... 100 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.

Switch Conﬁgurations (Shown in Pulled Position)

DPST NC/NO

DPDT

DPST NC/NC

PULLED

PUSHED

DPST NO/NO

SPST NO

SPDT

Speciﬁcations are subject to change without notice.

Customers should verify actual device performance in their speciﬁc applications.

54 - 1/2 ” (12.5 mm) Panel Control w/Push-Pull Switch

Product Dimensions

(SEE SHAFT/

BUSHING STYLES)

(SEE SHAFT/

BUSHING STYLES)

MOUNTING SURFACE

24.13 ± 0.53

(.950 ± .021)

8.89 ± 0.17

(.350 ± .007)

PRIMARY UNIT

15.24 ± 0.25

(.600 ± .010)

SWITCH MODULE

12.5

(.492)

6.25

(.246)

6.99

(.275)

MOUNTING

SURFACE

0.76

9 PLCS.

(.030)

2.54

(.100)

3.3 - 4.7

(.130 - .185)

SWITCH ACTUATION

TRAVEL

0.3

(.012)

5.08 ± 0.3

(.200 ± .012)

11.9 ± 0.3

(.469 ± .012)

2.54

(.100)

3 PLCS.

0.66 ± 0.05

(.026 ± .002)

2.54

(.100)

6.35 ± 0.25

(.250 ± .010)

2.54

(.100)

0.64 ± 0.05

6 PLCS.

(.025 ± .002)

5.08 ± 0.3

(.200 ± .012)

5.08 ± 0.3

(.200 ± .012)

5.08

(.200)

11.9

(.469)

5.08

(.200)

5.08

(.200)

SUGGESTED PCB LAYOUT

PACKAGE DIMENSIONS WITH FRONT AND REAR PCB MOUNTING BRACKET

MOUNTING

SURFACE

5.08

(.200)

2 PLCS.

0.91 ± 0.05

(.036 ± .002)

0.64 ± 0.05

6 PLCS.

(.025 ± .002)

5.08 ± 0.3

(.200 ± .012)

5.08 ± 0.3

(.200 ± .012)

1.02

4 PLCS.

(.040)

0.76

9 PLCS.

(.030)

2.54

(.100)

2 PLCS.

1.32 ± 0.25

(.052 ± .010)

0.3

(.012)

5.08 ± 0.3

(.200 ± .012)

11.9 ± 0.3

(.469 ± .012)

2 PLCS.

0.41 ± 0.05

(.016 ± .002)

2.54

(.100)

TERMINAL

SPACING

2 PLCS.

6.35 ± 0.25

(.250 ± .010)

5.08

(.200)

5.08

(.200)

5.08

(.200)

1.32

(.052)

5.08

(.200)

11.9

(.469)

5.08

(.200)

2.54

(.100)

5.08

(.200)

DIMENSIONS:

(INCHES)

28.37

(1.117)

SUGGESTED PCB LAYOUT

Anti-Rotation Lug

(Style "A", 90 ° CW Shown)

0.80 ± 0.30

(.031 ± .012)

0.41

(.016)

1.52

(.060)

5.70

(.224)

Terminal Layout

Electrical Schematic

CCW

Suggested Panel Layouts

6.20

(.244)

6.35

(.250)

.25

FOR TOLERANCES SHOWN: .XX = ±

(.010)

.XXX = ± .13

(.005)

SHAFT DIMENSIONS ± .80

(1/32)

2.20

(.087)

BUSHING DIAMETER

0.80

( .031)

2.77

(.109)

BUSHING DIAMETER

0.80

( .031)

The Model 54 can be used with either

of the two panel layouts shown below.

Speciﬁcations are subject to change without notice.

Customers should verify actual device performance in their speciﬁc applications.

54 - 1/2 ” (12.5 mm) Panel Control w/Push-Pull Switch

Shaft/Bushing Styles

9.53

(.375)

How To Order

P50

1.60 ± 0.25

OPT.

(.063 ± .010)

3/8-32UNEF-2A

6.35

9.53

SHAFT

BUSHING

(.250)

(.375)

1.194 ± 0.10

OPT.

(.047 ± .004)

A Style Bushing

STD. LENGTH ‘L’

.750

(19.05)

.875

(22.23)

ANTI-ROTATION LUG /

BRACKET OPTION

Code Description

AR Lug 90 ° CW

No AR Lug or Bracket

Front Bracket

Front and Rear Bracket

RoHS IDENTIFIER

Code Description

Compliant

SWITCH OPTION

Code Description

P50 DPDT

6.35

(.250)

NO. OF SECTIONS

Code Description

Single plus Switch

0.79 ± 0.25

OPT.

(.031 ± .010)

1/4-32UNEF-2A

3.18

6.35

SHAFT

BUSHING

(.125)

(.250)

0.79 ± 0.10

OPT.

(.031 ± .004)

BUSHING DESIGNATOR

Code Description

3/8 ” D x 3/8 ” L Threaded

1/4 ” D x 1/4 ” L Threaded

RESISTANCE CODES

Code Value in Ohms

10 1K

13 5K

15 10K

18 50K

20 100K

22 250K

23 500K

C Style Bushing

STD. LENGTH ‘L’

.750

(19.05)

.875

(22.23)

MODEL

Code Description

54 PC Terminals w/Push-Pull

Switch

ELEMENT TAPER

TYPE/TOLERANCE

Code Description

Linear CP ±20 %

Linear CP ±10 %

CW Audio CP ±20 %

CW Audio CP ±10 %

9.53

(.375)

MAX. FLAT LENGTH

1.52 ± 0.25

OPT.

(.060 ± .010)

15.88

(.625)

SHAFT LENGTH DESIGNATOR

Code Description

24 3/4 ” FMS Long

28 7/8 ” FMS Long

3/8-32UNEF-2A

6.35

9.53

SHAFT

BUSHING

(.250)

(.375)

5.49 ± 0.10

OPT.

(.216 ± .005)

A Style Bushing -

Flatted Shaft

STD. LENGTH ‘L’

.750

(19.05)

.875

(22.23)

Boldface features are Bourns

standard options. All others are

available with higher minimum

order quantities.

Code

SHAFT STYLE

Description

1/4 ” D Slotted End

1/4 ” D Flatted End

1/8 ” D Slotted End

AVAILABLE ONLY WITH

BUSHING

Code

DIMENSIONS:

(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.