Datasheet

www.vishay.com For technical questions, contact: [e-mail] Document Number: 57054
113 See also Application Notes: www.vishay.com/doc?51001
and www.vishay.com/doc?52029 Revision: 26-Jan-11
248, 249
Vishay Spectrol
1/2" (12.7 mm) Conductive Plastic and Cermet
Potentiometer
MARKING
 Vishay trademark
 Part number
 Tolerance
 Date code
 Terminal identification
PACKAGING
- In box of 50 pieces, code B25 (BO50)
PERFORMANCE
TESTS CONDITIONS
TYPICAL VALUES AND DRIFTS FOR 249
R
T
/R
T
(%) R
1-2
/R
1-2
(%)
OTHER
Electrical Endurance
1000 h at rated power
90’/30’ - ambient temp. 70 °C
± 3 % ± 5 % Contact res. variation: < 1 %
Damp Heat, Staedy State
4 days
40 °C 93 % HR
± 2 % -
Dielectric strength: 1000 V
RMS
Insulation resistance: > 10
4
M
Change of Temperature
5 cycles
- 55 °C at + 125 °C
± 1 % -
V
1-2
/V
1-3
 ± 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 % -
V
1-2
/V
1-3
 ± 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
 WVmAWVmA
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