302 Datasheet, PDF (3/4 Pages) DB Lectro Inc – SCREW TYPE SERIES

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Model 302
Vishay Spectrol
MECHANICAL SPECIFICATIONS
PARAMETER
Rotation
360° (continuous)
Bearing type
Servo and screw mount: ball
Bushing mount: sleeve
Ganging
6 sections maximum, terminal alignment, added sections, within ± 10° of section 1 terminals
Torque (maximums)
Servo and screw (1 section)
Bushing (1 section)
Each added section
STARTING
1.0 oz. - in (72.00 g - cm)
1.7 oz. - in (122.42 g - cm)
0.6 oz. - in (43.21 g - cm)
RUNNING
0.5 oz. - in (36.00 g - cm)
1.0 oz. - in (72.00 g - cm)
0.4 oz. - in (28.80 g - cm)
Mechanical runouts (maximums)
Shaft (TIR/in)
Pilot dia. (TIR)
Lateral (TIR)
Shaft end play
Shaft radial play
SERVO AND SCREWING
0.002" (0.05 cm)
0.002" (0.05 cm)
0.003" (0.08 cm)
0.005" (0.13 cm)
0.002" (0.05 cm)
BUSHING
0.002" (0.05 cm)
0.002" (0.05 cm)
0.005" (0.13 cm)
0.005" (0.13 cm)
0.003" (0.08 cm)
Moment of inertia
2.0 g - cm² per section maximum
Weight (maximums)
Single section:
Each additional section:
4.0 oz. (113.40 g)
1.2 oz. (34.02 g)
MATERIAL SPECIFICATIONS
Housing and lids
Aluminum, anodized
Shaft and clamp rings
Stainless steel, non-magnetic
non-passivated
Terminals
Brass, plated for solderability
Bushing mount hardware
Lockwasher internal tooth:
Panel nut:
Steel, nickel plated
Brass, nickel plated
ENVIRONMENTAL SPECIFICATIONS
Vibration
15 g thru 2000 Hz
Shock
50 g
Salt spray
96 h
Rotational life
1 million shaft revolutions
Temperature range
-55 °C to +125 °C
Note
• Nothing stated herein shall be construed as a guarantee of
quality or durability.
MARKING
Unit identification
Units shall be marked with Vishay Spectrol name, model no and date code, and on each section,
resistance, resistance tolerance, linearity and terminal identification.
Example of a marking for a standard part: 302-11202
POWER RATING CHART
(Ratings for cup No. 1. Additional cups 75 % of values
shown)
8
6
4
SPECIAL 150 °C
2
STANDARD 125 °C
0
20 40 60 80 100 120 140 160
AMBIENT TEMPERATURE IN °C
RESISTANCE ELEMENT DATA
RESISTANCE
VALUES
()
RESO-
LUTION
(%)
MAXIMUM MAXIMUM
OHMS CURRENT VOLTAGE
PER AT 40 °C ACROSS
TURN AMBIENT COIL
(mA)
(V)
WIRE
TEMP.
COEF.
(ppm/°C)
5
0.320 0.016 893
4.48
800
10
0.200 0.020 633
6.32
800
20
0.165 0.033 447
8.95
800
50
0.148 0.074 283
14.1
800
100
0.151 0.151 200
20.0
20
200
0.126 0.252 141
28.4
20
500
0.115 0.573 89.4
44.7
20
1K
0.098 0.981 63.3
63.2
20
2K
0.085 1.70 44.7
89.5
20
5K
0.059 2.93 28.3
141
20
10K
0.051 5.16 20.0
200
20
20K
0.043 8.55 14.1
284
20
50K
0.032 15.80 8.94
447
20
Revision: 22-Nov-16
3
Document Number: 57057
For technical questions, contact: [e-mail]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000