MODEL 68
3/8” Square
Multiturn
Cermet Trimming
Potentiometer
ELECTRICAL
1
Standard Resistance Range, Ohms
Standard Resistance Tolerance
Input Voltage, Maximum
Slider Current, Maximum
Power Rating, Watts
End Resistance, Maximum
Actual Electrical Travel, Turns, Nominal
Dielectric Strength
Insulation Resistance, Minimum
Resolution
Contact Resistance Variation, Maximum
ENVIRONMENTAL
10 to 2Meg
±10% (<100 Ohms = ±20%)
200 Vdc or rms not to exceed power rating
100mA or within rated power, whichever is less
0.5 at 85°C derating to 0 at 125°C
2 Ohms
20
900 Vrms
1,000 Megohms
Essentially infinite
1% or 1 Ohm, whichever is greater
Seal
Temperature Coefficient, Maximum
Temperature Range
Thermal Shock
Moisture Resistance
Shock, 6ms Sawtooth
Vibration
High Temperature Exposure
Rotational Life
Load Life at 0.5 Watts
Resistance to Solder Heat
MECHANICAL
85°C Fluorinert® (No Leaks)
±100ppm/°C
–55°C to +125°C
5 cycles, –55°C to +125°C (1%
∆RT,
1%
∆VR)
Ten 24 hour cycles (1%
∆RT,
IR 1,000 Megohms min.)
100G’s (1%
∆RT,
1%
∆VR)
20G’s, 10 to 2,000 Hz (1%
∆RT,
1%
∆VR)
250 hours at 125°C (2%
∆RT,
2%
∆VR)
200 cycles (3%
∆RT)
1,000 hours at 70°C (2%
∆RT)
260°C for 10 sec. (1%
∆RT)
Mechanical Stops
Torque, Starting Maximum
Weight, Nominal
Fluorinert® is a registered trademark of 3M Company.
Specifications subject to change without notice.
Clutch Action, both ends
5 oz.-in. (0.035 N-m)
.04 oz. (1.13 grams)
1-51
Model 68
TOP ADJUSTMENT (Inch/mm)
Model 68W
.245
Max.
6.22
.375
±
.015
9.53
±
0.38
.15
±
.02
3.8
±
0.5
Schematic Diagram
This Surface
.062
±
.015
1.58
±
0.38
Metal Adjustment Screw
.090/2.29 Dia. With
.020/0.51 Wide X
.025/0.64 Min. Depth
.12
±
.02
3.1
±
0.5
.060
±
.015
1.52
±
0.38
.015
0.38
.375
±
.015
9.53
±
0.38
Standard Marking This Surface
.18
Min.
4.6
(3)
(2)
(1)
.020
±
.003
Dia.
0.51
±
0.08
Terminal Pins (3)
.045
±
.015
1.14
±
0.38
.10
2.5
.10
2.5
.187
±
.015
4.75
±
0.38
SIDE ADJUSTMENT (Inch/mm)
Model 68P
.245
6.22
Max.
Schematic Diagram
This Surface
.18
4.6
Min.
Standoff
(3)
(2)
Metal Adjustment Screw
.090/2.29 Dia. With
.020/0.51 Wide X
.025/0.64 Min. Depth
(1)
.03
Max.
0.8
Meniscus
(Typ)
.060
±
.015
1.524
±
0.38
.10
2.5
.375
±
.015
9.53
±
0.38
(3)
(2)
.12
±
.02
3.1
±
0.5
(1)
.10
2.5
.10
2.5
.015
±
.002
Min.
0.38
±
0.05
.187
±
.015
4.75
±
0.38
.020
±
.003
Dia.
0.51
±
0.08
Terminal Pins (3)
.375
±
.015
9.53
±
0.38
.187
±
.015
4.75
±
0.38
Standard Marking
This Surface
.19
±
.02
4.8
±
0.5
1-52
Model 68
SIDE ADJUSTMENT (Inch/mm)
1
Model 68X
.15
±
.02
3.8
±
0.5
.375
±
.015
9.53
±
0.38
.245 Max.
6.22
Metal Adjustment Screw
.090/2.29 Dia. With
.020/0.51 Wide X
.025/0.64 Min. Depth
Schematic Diagram This Surface
Standard Marking This Surface
.32
±
.02
8.1
±
0.5
.375
±
.015
9.53
±
0.38
.020
±
.003
Dia.
0.51
±
0.08
Terminal Pins (3)
.18
Min.
4.6
(3)
(2)
(1)
.060
±
.015
1.524
±
0.38
.045
±
.015
1.14
±
0.38
.10
2.5
.187
±
.015
4.75
±
0.38
.10
2.5
STANDARD RESISTANCE VALUES, OHMS
10
20
50
100
CIRCUIT DIAGRAM
200
500
1K
2K
5K
10K
20K
25K
NOTES
50K
100K
200K
250K
500K
1Meg
2Meg
(2)
(1)
CW
(3)
Metric equivalents, based on 1 inch = 25.4mm are
rounded to the same number of significant figures
as in the original English units and are provided for
general information only.
Tolerances unless otherwise specified:
Linear = ± .01 inches (.25mm)
Angular = ± 2 degrees
INCH
mm
1-53
Model 68
PACKAGING
Standard:
Boxes
Capacity
=
=
100 Units (68W)
50 Units (All other styles)
Option:
Tubes
All units oriented with #1 pin to same side.
Pin Style
Magazine Width
Height
Length
Capacity
P
0.57”
0.66”
20.9”
50 Units
W
0.33”
0.90”
20.4”
50 Units
X
0.33”
0.90”
24.4”
50 Units
=
=
=
=
Option:
Tape & Reel, Ammo Pack (Available only for 68W and 68X)
All units oriented with #1 pin to the right of the direction of feed.
Seat Plane to
Centerline of
Sprocket Hole
Width
Sprocket
Capacity
Diameter
Tape Fold
Box
Tape
Reel
Ammo
=
=
=
=
=
=
=
.71” (18.03 mm)
18 mm
Single Hole .50” spacing
1,000 Units
14” (356 mm)
12” (305 mm)
1.8” x 13” x 10”
(46mm x 330mm x 254mm)
ORDERING INFORMATION
Standard:
Model Series
Pin Style
Option:
Pin Style
68 P R 10K LF
RoHS Compliant Product Code - Optional
Resistance Value
Resistance Prefix
68 W R 10K LF TB
Packaging Option:
TB = Tubes
(Pin styles P, W, X)
68 W F R 10K LF TR
Pin Style
Pin Style Suffix:
(Used with AP and TR packaging options.
Applicable to pin styles W & X only.
"F" designates 0.70" lead length.)
Packaging Option:
AP = Ammo pack
TR = Tape & Reel
(Pin styles W, X only)
Option:
1-54
Model 68
