MODEL 25
1/4” Square
Single Turn
Cermet Trimming
Potentiometer
ELECTRICAL
1
Standard Resistance Range, Ohms
Standard Resistance Tolerance
Input Voltage, Maximum
Power Rating, Watts
End Resistance, Maximum
Actual Electrical Travel, Nominal
Dielectric Strength
Insulation Resistance, Minimum
Resolution
Contact Resistance Variation, Maximum
ENVIRONMENTAL
10 to 2Meg
±20% (±10% available)
250 Vdc or rms not to exceed power rating
0.5 at 70°C derating to 0 at 125°C
1% or 1 Ohm, whichever is greater
210°
900Vrms
1,000 Megohms
Essentially infinite
1% or 1 Ohm, whichever is greater
Seal
Temperature Coefficient, Maximum
Operating 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 (2%
∆RT,
2%
∆VR)
Ten 24 hour cycles (3%
∆RT)
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 (2 Ohms +3%
∆RT)
1,000 hours at 70°C (3%
∆RT,
3%
∆VR)
350°C for 3 sec. (1%
∆RT)
Mechanical Stops
Stop Strength, Minimum
Torque, Maximum
Weight, Nominal
Fluorinert® is a registered trademark of 3M Company.
Specifications subject to change without notice.
Solid
6 oz.-in. (500 gr-cm)
3 oz.-in. (200 gr-cm)
.01 oz. (0.3 grams)
1-17
Model 25
TOP ADJUSTMENT (Inch/mm)
Model 25P
.27
±
.01
6.8
±
0.3
.22
±
.02
5.5
±
0.5
.12
±
.01
3.0
±
0.2
.27
±
.02
6.8
±
0.4
.20
±
.04
5.0
±
1.0
.20
±
.01
5.0
±
0.3
.10
2.5
.10
2.5
(2)
(3)
(1)
.04
±
.01
0.9
±
0.3
.02
0.5 Max.
Adjustment Slot
.09
Long x
2.2
+.004
–.000
.05
Wide x
Deep Slot
+.010
1.2
0.5
–0.00
.02
.10
±
.01
2.5
±
0.3
Solderable Terminals Leads
(Typical 3 Places)
.01
.02
±
.004
Wide x
Thick
0.3
0.5
±
0.10
Note: Model 25P Dimensions Applicable To All Models Except As Noted
Model 25W
.08
±
.01
2.0
±
0.3
(2)
(3)
(1)
.10
±
.01
2.5
±
0.3
.10
±
.01
2.5
±
0.3
Model 25U
.13
±
.01
3.4
±
0.3
.10
2.5
.10
2.5
(3) (2) (1)
.20
±
.01
5.0
±
0.3
STANDARD RESISTANCE VALUES, OHMS
10
20
50
100
200
500
1K
2K
5K
10K
20K
50K
100K
200K
500K
1Meg
2Meg
1-18
Model 25
PACKAGING
Standard:
Boxes
Capacity
=
100 Units
Option:
Tubes (Available only for 25U and 25V)
All units oriented with #1 pin to same side.
Pin Style
U
Magazine
Width
=
.33” (8.4 mm)
Height
=
0.59” (15 mm)
Length
=
19.7” (500 mm)
Capacity
=
70 Units
Tape & Reel, Ammo Pack (Available only for 25U and 25V)
All units oriented with #3 pin towards direction of feed.
Seat Plane to
Centerline of
Sprocket Hole
Width
Sprocket
Capacity
Diameter
Tape Fold
Box
V
.31” (7.9 mm)
0.71” (18 mm)
19.7 (500 mm)
70 Units
Option:
Tape
Reel
Ammo
=
=
=
=
=
=
=
.71” (18 mm)
18 mm
Single Hole .50” spacing
1,000 Units
14” (363 mm)
12”
2.0” x 13.4” x 13.8”
(50mm x 340mm x 350mm)
ORDERING INFORMATION
Standard:
Model Series
Pin Style
25 P R 10K
Resistance Value
Resistance Prefix
Option:
Pin Style
25 U R 10K XX
Packaging Option
AP = Ammo Pack
TR = Tape & Reel
TB = Tubes
CIRCUIT DIAGRAM
NOTES
(2)
(1)
CW
(3)
English equivalents are based on 1 inch = 25.4mm
and are provided for general information only.
Tolerances unless otherwise specified:
Linear = ± 0.3 mm (.01 in.)
INCH
mm
1-20
Model 25
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