248, 249
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Vishay Spectrol
Revision: 02-Sep-16
2
Document 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
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 V
DC
Dielectric strength 750 V
RMS
minimum 50 Hz/60 Hz
End resistance 2 maximum each end
Effective electrical travel 265° ± 5°
0
50
150
125
0
AMBIENT TEMPERATURE IN °C
POWER IN W
7025
100
0.5
0
50
150
125
0
AMBIENT TEMPERATURE IN °C
POWER IN W
7025
100
1
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
1/4" Bush 50 Ncm
3/8" Bush 70 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 IP50
MARKING
• Vishay trademark
•Part number
• Tolerance
•Date code
• Terminal identification
PACKAGING
- In box of 50 pieces, code B25 (BO50)
