1
1-25 Model 25
Seal 85°C Fluorinert® (No Leaks)
Temperature Coefficient, Maximum ±100ppm/°C (<200 ohms = ±250ppm/°C)
Operating Temperature Range –55°C to +125°C
Thermal Shock 5 cycles, –55°C to +125°C (2% ∆RT, 2% ∆VR)
Moisture Resistance Ten 24 hour cycles (3% ∆RT)
Shock, 6ms Sawtooth 100G’s ( 1% ∆RT, 1% ∆VR)
Vibration 20G’s,10 to 2,000 Hz (1% ∆RT, 1% ∆VR)
High Temperature Exposure 250 hours at 125°C (2% ∆RT, 2% ∆VR)
Rotational Life 100 cycles (5% ∆RT)
Load Life at 0.5 Watts 1,000 hours at 70°C (3% ∆RT, 3% ∆VR)
ELECTRICAL
Standard Resistance Range, Ohms 10 to 2Meg
Standard Resistance Tolerance ±20% (±10% available)
Input Voltage, Maximum 250 Vdc or rms not to exceed power rating
Power Rating, Watts 0.5 at 70°C derating to 0 at 125°C
End Resistance, Maximum 1% or 3 Ohms, whichever is greater
Actual Electrical Travel, Nominal 210°
Dielectric Strength 500Vrms
Insulation Resistance, Minimum 1,000 Megohms
Resolution Essentially infinite
Contact Resistance Variation, Maximum 1% or 1 Ohm, whichever is greater
MECHANICAL
Mechanical Stops Solid
Stop Strength, Minimum 6 oz.-in. (500 gr-cm)
Torque, Maximum 3 oz.-in. (200 gr-cm)
Weight, Nominal .01 oz. (0.4 grams)
MODEL 25
1/4” Square
Single Turn
Cermet Trimming
Potentiometer
Fluorinert® is a registered trademark of 3M Company.
Specifications subject to change without notice.
ENVIRONMENTAL
1-26 Model 25
TOP ADJUSTMENT
.27 ± .01
6.8 ± 0.3 .12 ± .01
3.0 ± 0.2
.22 ± .02
5.5 ± 0.5
.27 ± .02
6.8 ± 0.4
.02
0.5
+.004
–.000
+.010
–0.00
.20 ± .04
5.0 ± 1.0
.02 ± .004
0.5 ± 0.10
.20 ± .01
5.0 ± 0.3
.04 ± .01
0.9 ± 0.3
.10 ± .01
2.5 ± 0.3
(2)
(1)(3)
.10
2.5
.02
0.5
.09
2.2
Max.
Adjustment Slot
Long x .05
1.2 Deep SlotWide x
.01
0.3 Thick
Solderable Terminals Leads
(Typical 3 Places)
Note: Model 25P Dimensions Applicable To All Models Except As Noted
Wide x
.10
2.5
Model 25P
.10 ± .01
2.5 ± 0.3
(2)
(1)
(3)
.10 ± .01
2.5 ± 0.3
.08 ± .01
2.0 ± 0.3
Model 25W
(2) (1)(3)
.20 ± .01
5.0 ± 0.3
.13 ± .01
3.4 ± 0.3 .10
2.5
.10
2.5
Model 25U
10 100 1K 10K 100K 1Meg
20 200 2K 20K 200K 2Meg
50 500 5K 50K 500K
STANDARD RESISTANCE VALUES, OHMS
1
1-27 Model 25
1-27
SIDE ADJUSTMENT
.20 ± .02
5.2 ± 0.4
.11 ± .01
2.9 ± 0.3
.20 ± .01
5.0 ± 0.3
25S
.10 ± .01
2.5 ± 0.3
(1) (2) (3)
.27 ± .01
6.8 ± 0.3
25S
25X
25V
.17 ± .02
4.4 ± 0.4
.20 ± .04
5.0 ± 1.0
.32 ± .02
8.2 ± 0.4
.02
0.5
.28
7.0 Max.
.02
0.5
.10
2.5
Max.
(3) (2) (1)
.27 ± .01
6.8 ± 0.3
25RS
25RX
25RV
25S
25X
25RS
25RX
.10
2.5
(2)
(3)(1) .11 ± .01
2.9 ± 0.3
.20 ± .01
5.0 ± 0.3
Note:
Models 25S And 25RS
Dimensions Applicable
To All Side Adjustment
Models Except As Noted.
25S
.10 ± .01
2.5 ± 0.3
.10
2.5
.10
2.5
(2)
(1)(3)
Model 25S and 25RS
.11 ± .01
2.9 ± 0.3
25V
(2) (3)
(1)
.11 ± .01
2.9 ± 0.3
25RV
25V 25RV
(2) (1)
(3)
.11 ± .01
2.9 ± 0.3
25X
.10 ± .01
2.5 ± 0.3
(2)
(3)
(1)
.11 ± .01
2.9 ± 0.3
25RX
.10 ± .01
2.5 ± 0.3
(2)
(1)(3)
Model 25V and 25RV
Model 25X and 25RX
25 P R 10K
Model Series
Pin Style
Resistance Value
Resistance Prefix
25 U R 10K XX
Pin Style Packaging Option
AP = Ammo Pack
TR = Tape & Reel
TB = Tubes
Model 25
1-28
PACKAGING
ORDERING INFORMATION
Standard:
Option:
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 V
Magazine Width = .33” (8.4 mm) .31” (7.9 mm)
Height = 0.59” (15 mm) 0.71” (18 mm)
Length = 19.7” (500 mm) 19.7 (500 mm)
Capacity = 70 units 70 units
Option: 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 = .71” (18 mm)
Tape Width = 18 mm
Sprocket = Single Hole .50” spacing
Capacity = 1,000 units
Reel Diameter = 14” (363 mm)
Ammo Tape Fold = 12”
Box = 2.0” x 13.4” x 13.8”
(50mm x 340mm x 350mm)
CIRCUIT DIAGRAM
(1)
(2)
(3)
CW
NOTES
mm
INCH
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.)
