249BBHS0XB25104KA - VISHAY

248, 249

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Revision: 30-Aug-17 1Document Number: 57054

For technical questions, contact: sferpottrimmers@vishay.com

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

1/2" (12.7 mm) Conductive Plastic and Cermet Potentiometers

FEATURES

• Model 248: 0.5 W at 70 °C (conductive plastic

element)

• Model 249: 1 W at 70 °C (cermet element)

• Cost effective panel potentiometer

• PCB mounting

• Tests according to CECC 41000 or IEC 60393-1

• Material categorization: for definitions of compliance

please see www.vishay.com/doc?99912

QUICK REFERENCE DATA

Multiple module No

Switch module n/a

Detent module n/a

Special electrical laws A: linear, L: logarithmic

Sealing level IP 50

Lifespan 10K cycles

DIMENSIONS in millimeters (inches) ± 0.5 mm (± 0.02")

VERSION BUSHING / SHAFT

ABCS

SHAFT BUSHING SCREWDRIVER

ØLØSLOT

B / BH 1/8" 3/4" 1/4" 0.8

F / GJ 1/4" 7/8" 3/8" 1.2

8.5

(0.335)

2.54 ± 0.25

(0.100 ± 0.010)

12.7 ± 0.4

(0.500 ± 0.016)

0.36

(0.014)

0.6

(0.024)

9.5

(0.375)

(0.395)

(0.039)

5.08

(0.200)

Mounting surface

12.7 ± 0.4

(0.500 ± 0.016)

Screwdriver slot shown

in mid electrical travel

0.6

(0.024)

2.54 ± 0.25

(0.100 ± 0.010)

248, 249

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Revision: 30-Aug-17 2Document Number: 57054

For technical questions, contact: sferpottrimmers@vishay.com

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

Note

• Hardware supplied in separate bags

ELECTRICAL SPECIFICATIONS

PARAMETER MODEL 248 MODEL 249

Element type Conductive plastic Cermet

Total resistance range 500  to 1 M

Standard series 1, 2, 5

Resistance tolerance ± 20 % ± 20 % (on request ± 10 %)

Power rating Linear

0.5 W at 70 °C 1.0 W at 70 °C

Circuit diagram

Temperature coefficient of resistance (typical) ± 500 ppm/°C ± 150 ppm/°C

Linearity (typical) ± 5 % independent

Limiting element voltage 300 V

Contact resistance variation (typical) 5 % of the total resistance

Insulation resistance 1000 M minimum, 500 VDC

Dielectric strength 750 VRMS minimum 50 Hz / 60 Hz

End resistance 2  maximum each end

Effective electrical travel 265° ± 5°

050 150

125

AMBIENT TEMPERATURE IN °C

POWER IN W

7025 100

0.5

050 150

125

AMBIENT TEMPERATURE IN °C

POWER IN W

7025 100

MECHANICAL SPECIFICATIONS

Mechanical travel 295° ± 5°

Operating torque 0.1 Ncm to 2 Ncm

End stop torque 35 Ncm (50 oz.-inch)

Max. tightening torque 150 Ncm

Weight 8.3 g (0.29 oz.)

(1/4" x 7/8" FMF metal shaft)

ENVIRONMENTAL SPECIFICATIONS

Temperature range -55 °C to +125 °C

Climatic category 55 / 125 / 4

Sealing IP 50

MARKING

•Vishay model

•Vishay logo

•Variation law

• SAP code for ohmic value

• Tolerance in %

• Date code (4 digits)

• Terminal identification “3” for lead 3

PACKAGING

• In box of 25 pieces, code BO25

248, 249

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Revision: 30-Aug-17 3Document Number: 57054

For technical questions, contact: sferpottrimmers@vishay.com

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

Note

• Nothing stated herein shall be construed as a guarantee of quality or durability.

PERFORMANCE

TESTS CONDITIONS TYPICAL VALUES AND DRIFTS FOR 249

RT/RT (%) R1-2/R1-2 (%) OTHER

Electrical endurance 1000 h at rated power

90’/30’ - ambient temp. 70 °C ± 3 % ± 5 % Contact res. variation: < 1 %

Damp heat, steady state 4 days

40 °C 93 % HR ± 2 % - Dielectric strength: 1000 VRMS

Insulation resistance: > 104 M

Change of temperature 5 cycles, -55 °C at +125 °C ± 1 % - V1-2/V1-3  ± 2 %

Mechanical endurance 10 000 cycles ± 3 % - Contact res. variation:  2 % Rn

Shock

50 g’s at 11 ms

3 successive shocks

in 3 directions

± 1 % ± 2 % -

Vibration 10 Hz to 55 Hz, 0.75 mm or 10 g’s

during 6 h ± 1 % - V1-2/V1-3  ± 2 %

STANDARD RESISTANCE ELEMENT DATA

STANDARD

RESISTANCE

VALUES

248 LINEAR TAPER 249 LINEAR TAPER

MAX.

POWER

AT 70 °C

MAX.

WORKING

VOLTAGE

MAX.

WIPER

CURRENT

MAX.

POWER

AT 70 °C

MAX.

WORKING

VOLTAGE

MAX.

WIPER

CURRENT

W V mA W V mA

500 0.5 15.8 32 1 22.4 45

1K 0.5 22.4 22 1 31.6 32

2K 0.5 31.6 16 1 44.7 22

2.5K 0.5 35.4 14 1 50.0 20

5K 0.5 50.0 10 1 70.7 14

10K 0.5 70.7 7 1 100 10

20K 0.5 100 5.0 1 141 7

25K 0.5 112 4.5 1 158 6

50K 0.5 158 3.2 1 224 4

100K 0.5 224 2.2 0.90 300 3.0

200K 0.45 300 1.50 0.45 300 1.5

250K 0.36 300 1.20 0.36 300 1.2

500K 0.18 300 0.60 0.18 300 0.6

1M 0.09 300 0.30 0.09 300 0.3

248, 249

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Revision: 30-Aug-17 4Document Number: 57054

For technical questions, contact: sferpottrimmers@vishay.com

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

ORDERING INFORMATION (part number)

MODEL BUSHING SHAFT SHAFT END SHAFT

MATERIAL LEADS PACKAGING

RESISTANCE CODE /

TOLERANCE / TAPE R OR

SPECIAL

248 =

plastic

conductive

249 =

cermet

element

F = Ø 3/8"

B = Ø 1/4"

Ø L S = slotted

R = round

F = flatted

0 = metal X = std B25 =

box of

25 pieces

Resistance:

From 501 = 500 

to 105 = 1 M

Tolerance:

M = 20 %;

On request:

K = 10 % (249 only)

Taper:

A = linear;

L = logarithmic

GJ 1/4" 7/8"

BH 1/8" 3/4"

RELATED DOCUMENTS

APPLICATION NOTES

Potentiometers and Trimmers www.vishay.com/doc?51001

Guidelines for Vishay Sfernice Resistive and Inductive Components www.vishay.com/doc?52029

GJS0XB 5 5 M82 F4 222A

Legal Disclaimer Notice

www.vishay.com Vishay

Revision: 01-Jan-2021 1Document Number: 91000

Disclaimer

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Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over

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