1
1-17 Model 25
Seal 85°C Fluorinert® (No Leaks)
Temperature Coefficient, Maximum ±100ppm/°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 200 cycles (2 Ohms +3% ∆RT)
Load Life at 0.5 Watts 1,000 hours at 70°C (3% ∆RT, 3% ∆VR)
Resistance to Solder Heat 350°C for 3 sec. (1% ∆RT)
ELECTRICAL
Standard Resistance Range, Ohms 10 to 2Meg
Standard Resistance Tolerance ±10%
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 2 Ohm, whichever is greater
Actual Electrical Travel, Nominal 210°
Dielectric Strength 900Vrms
Insulation Resistance, Minimum 1,000 Megohms
Resolution Essentially infinite
Contact Resistance Variation, Maximum 1% or 3 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. (0.3 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
1-18 Model 25
TOP ADJUSTMENT (Inch/mm)
10 100 1K 10K 100K 1Meg
20 200 2K 20K 200K 2Meg
50 500 5K 50K 500K
STANDARD RESISTANCE VALUES, OHMS
1
1-19 Model 25
1-19
SIDE ADJUSTMENT (Inch/mm)
25 P R 10K
Model Series
Pin Style
Resistance Value
Resistance Prefix
25 U R 10K XX
Pin Style Packaging Option (25U & 25V)
AP = Ammo Pack
TR = Tape & Reel
Model 25
1-20
PACKAGING
ORDERING INFORMATION
Standard Package
Optional Packaging
Standard: Tubes, all styles, 50 units/tube
All units oriented with #1 pin to same side.
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 = 750 Units U style, 1000 V style
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.)
