MODEL 7380 SERIES
7/8” Diameter
3–Turn
Wirewound
Precision Potentiometer
2
MODEL STYLES
7381
7383
7386
7388 (for heavy side load applications)
NEW PRODUCT
1/8” Shaft, 1/4” Bushing
1/8” Shaft, Servo
1/4” Shaft, 3/8” Bushing
1/4” Shaft, 3/8” Bushing
ELECTRICAL
Resistance Range, Ohms
Standard Resistance Tolerance
Minimum Practical Resistance Tolerance
Independent Linearity
Minimum Practical Independent Linearity
Power Rating, Watts
Dielectric Strength
Insulation Resistance, Minimum
Noise, Maximum
Actual Electrical Travel
Tap Tolerance
End Voltage, Maximum
Specifications subject to change without notice.
100 to 30K
±5%
±1%
±0.30% (<500 Ohms)
±0.25% (≥500 Ohms)
±0.30%, < 500 Ohms
±0.20%,
≥
500 Ohms
1.5 at 70°C derating to 0 at 125°C
1,000V rms
1,000 Megohms
100 Ohms
1080° + 10° – 0°, > 100 Ohms
1080° + 10° – 5°,
≤
100 Ohms
±3°
0.25% of input voltage
2-103
Model 7380 Series
ENVIRONMENTAL (MIL-R-12934)
Operating Temperature Range
Temperature Cycling
Shock, 6ms Sawtooth
Vibration
Moisture Resistance
High Temperature Exposure
Rotational Load Life
Rotational Life Model 7388 (1 pound Side Load)
MECHANICAL
Static: –55°C to +125°C
Dynamic: –40°C to +125°C
5 cycles, –55°C to +125°C (5%
∆R)
100G’s (0.1ms discontinuity max.)
15G’s, 10 to 2,000 Hz (5%
∆R,
0.1ms discontinuity max.)
Five 24 hour cycles (3%
∆R)
1,000 hours at 125°C (5%
∆R)
1 Million shaft rev. + 900 hrs. at rated wattage at 70°C (5%
∆R)
1 Million shaft rev. + 900 hrs. at rated wattage at 70°C (5%
∆R)
Total Mechanical Travel
Number of Gangs, Maximum
Weight, Nominal (single gang)
Backlash, Maximum
Static Stop Strength
Panel Nut Tightening Torque, Maximum
Shaft End Play, Maximum
Shaft Runout, T.I.R., Maximum
Pilot Diameter Runout, T.I.R., Maximum
Lateral Runout, T.I.R., Maximum
Shaft Radial Play, Maximum
Start/Run Torque, Maximum (per gang)
STANDARD RESISTANCE VALUES, OHMS
7381, 7386
60 oz.-in.
25 lb.-in.
.010”
.003”
.004”
.005”
.003”
1.2 oz.-in.
1080° + 15° – 0°
2
0.75 oz.
1°
7383
36 oz.-in.
N/A
.005”
.002”
.002”
.004”
.002”
0.9 oz.-in.
Total
Resistance
100
200
500
1K
2K
5K
10K
20K
Theoretical
Resolution
(% Nominal)
0.059
0.037
0.030
0.024
0.020
0.018
0.017
0.016
Tempco
of Wire
±20 ppm/°C
±20 ppm/°C
±20 ppm/°C
±20 ppm/°C
±20 ppm/°C
±20 ppm/°C
±20 ppm/°C
±20 ppm/°C
2-104
Model 7380 Series
OUTLINE DIMENSIONS (Inch/mm)
Models 7381 & 7386
Bushing Mount with Sleeve Bearing
Dim.
A
7381
.688±.013
17.475±0.787
+.0000
-.0003
Dia.
+0.0000
3.1699
-0.0076
.1248
+.000
.281
-.002
Dia.
+0.000
7.137
-0.051
1/4-32 UNEF Thread
7386
.812±.031
20.625±0.787
+.0000
-.0005
Dia.
+0.0000
6.3500
-0.0127
.2500
+.000
.406
-.002
Dia.
+0.000
10.312
-0.051
3/8-32 UNEF Thread
B
2
C
Mounting Surface
Dim. A
.125 Min.
3.18
Dim. B
Dim. C
D
1.125±.031
28.58±0.79
.750±.016
19.1±0.41
Slider
CCW
CW
75°
Max.
.625 R Max.
15.9
.080±.001
Dia.
2.03±0.03
Slot: .032±.005/0.813±0.127 Wide X
.032+.010-.000/0.813+0.254-0.000 Deep
(Not on Rear Shaft Models)
+.000
-.010
+0.00
1.58
-0.25
.062
Chamfer
Dim. D .016/0.41 Max. x 45°
.312±.016
7.93±0.41
.875±.016 Dia.
22.2±0.41
OPTIONAL TERMINAL CONFIGURATION
40°
VIEW B
SLIDER
.625 R MAX
15.9 R MAX
.110
2.794
.020 Thickness
.060
±
.003
Dia.
1.524
±
.076
.062
±
.003
1.524
±
.076
Use Special Feature Code “FT” to order.
Enlarged View B
2-105
Model 7380 Series
OUTLINE DIMENSIONS (Inch/mm)
Model 7383
Servo Mount with Ball Bearing
1.250±.031
31.75±0.79
.875±.016
22.2±0.41
.250
CCW 6.35
CW Min.
Mounting Surface
.375±.031
9.53±0.79
.781
Dia. Max.
19.8
+.0000
.1248
-.0003
Dia.
+0.0000
3.1699
-0.0076
+.000
-.001
+0.000 Dia.
15.875
-0.025
.625
.625
R. Max.
15.9
105°
Max.
Clamp
Ears
Slider
.080±.001
Dia.
2.03±0.03
.875±.016
22.2±0.41
Housing Dia.
.057
Min.
1.45
.062±.005
1.58±0.13
+.005
.875 -.010
+0.13 Dia.
22.2 -0.25
Clamp
.922
Dia. Max.
23.4
Chamfer
.016/0.406 Max. x 45°
.062±.005
1.58±0.13
OPTIONAL TERMINAL CONFIGURATION
105° MAX
40°
VIEW B
SLIDER
.625 R MAX
15.9 R MAX
.110
2.794
.020 Thickness
.060
±
.003
Dia.
1.524
±
.076
.062
±
.003
1.524
±
.076
Use Special Feature Code “FT” to order.
Enlarged View B
METRIC CONVERSIONS
1 in.
1 oz.
25.4 mm
28.4 gm
1 oz.-in.
1 lb.-in.
0,007 N-m
0,113 N-m
2-106
Model 7380 Series
SPECIAL FEATURES
Center Tap
Linearity Tape
Rear Shaft Extension
Flatted Shaft
Slotted Shaft (Standard on single cup 7386 without RS)
Shaft Lock (7381, 7386 only)
High Torque, 2–6 oz.-in. (7386 only)
Additional Gangs
Gold Plated Solder Lug Terminals (See optional terminal configuration)
ORDERING INFORMATION
CT
LT
RS
FS
SS
SL
HT
2G
FT
2
7386 R 10K T2 L .50 XX
Model Series
Resistance Prefix
Resistance Value
Optional Special
Feature Code
Linearity
Optional
Non-Standard Tolerance
MATCHING TURNS COUNTING DIALS
7381: RBJ, 2601, 2641
7386: RB, 2126, 2606, 2606S, 2607, 2607S, 2626, 2627, 2646, 2646S, 2647, 2647S
CIRCUIT DIAGRAM
NOTES
(S)
(CCW)
(CW)
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
2-107
Model 7380 Series
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