®
Commercial 3/4"
Series 118
(19.1mm) Diamete
Watt, Wirewound
2-
r,
Variable Resisters
Features
• Fully enclosed construction
• Long rotation life
• Optional grounded or insulated rotor
construction
• Incorporated fixed resistor available
• Available with nylon shaft
• Bushing mounting style
• RoHS compliant
Electrical and Mechanical Specifications
Resistance Range
1 ohm through 20,000 ohms (linear taper)
Resistance Tolerance
Standard
Special
Power Rating, Watt
2 watts @ 55°C derated to no load @ 105°C,
Voltage Rating
Terminals to mounting surface (insulated types only):
Across end terminals
: ±20%
: ±10%
s
linear taper, bushing mounted control o
steel panel 4"x4" x .050
(101.6mm x 101.6mm x 1.27mm)
High pot test, one minute — 900 VAC
Operating Maximum — 500 VDC
Determined by resistance value an
wattage ratin
g
"
.
:
d
n
Resistance Tapers
Standard: Linear
Taps Available
e
Non
Incorporated Fixed Resisto
A fixed resistor can be incorporated at the en
of CW or CCW rotation to a minimum of 15% of
the total resistance value. The rotation i
shortened by an amount proportional to the rati
of the fixed resistor to the total resistance value
Angle of Rotation
Total Rotation: 270° ± 5°
Rotational Torque
Turning Torque: 1/2 to 10 in-oz. (36-720 gf-cm
Stop Strength
4 in-oz. (4.61 Kgf-cm)
r
d
s
o
.
)
1 - 2 © 2006 CTS Corporation. All rights reserved. Information subject to change.
CTS Electronic Components www.ctscorp.com
9/30/06
Electrical and Mechanical Specifications
Terminal Information
Insulated Construction (Standard)
The contactor is insulated from the base and
connected to the center terminal on the insulated
construction. This construction can be supplied
with the center terminal and one end terminal at
either end of the resistance element or with the
center terminal and terminals at both ends of the
resistance element.
Grounded Construction (Optional)
The grounded construction is supplied without a
center terminal and the contactor is connected to
the case. This construction can be furnished with
one end terminal at either end of the resistance
element or with terminals at both ends of the
element.
CTS SERIES TYPE 118
CENTER TERMINAL SUPPLIED WITH INSULATED CONTACT ARM CONSTRUCTION.
OMITTED ON GROUNDED CONTACT ARM CONSTRUCTION.
END C.W
45°
7.95
.313
45°
OPTIONAL PC TERMINAL POSTION
PERPENDICULAR
END C.C.W
RO
T.
TO MFG. SURFACE.
3/8-32 UNEF-2A
Bushing Information
Standard: 3/8"-32 UNEF-2A thread, .375" (9.53mm)
or .250" (6.35mm) long. M9 x 0.75
available.
Special: As required in increments of 1/16" (1.58mm)
Locating Lugs
Standard Position: Left side (with terminals down)
supplied, unless otherwise
specified.
Other Positions: Available with right side only, both
left and right, or without lugs.
CLEARANCE HOLE FOR 3/8-32 THREADED BUSHING
10.41
7.14
.281
3.96
.156
9.4±0.05
.370±.002
.062
1.52
.060
1.57
10.41
40°
.410
.410
1.57
.062
2.08
.082
1.4
.055
2.79±0.05
40°
.110±.002
4.16±0.05
.164±.002
270°
ROT.
11.13
.438
Ordering Information
118 G A 3 32 R 103 B 1
TERMINAL STYLE
J – INSULATED
CONSTRUCTION
G –GROUNDED
CONSTRUCTION
MOUNTING STYLE BUSHING
A – 1/4" (6.35mm) LONG
B – 3/8" (9.53mm) LONG
Metric bushings available. Consult CTS.
TERMINLS 1.98/.078
WIDE X 0.40/.016
LOCATING LUG
2.03±0.38
.080±.015
ABOVE MFG SUR
LOCATING
LUG
1 – LEFT
2 – RIGHT
3 – NONE
6.35
.250
11.13
0.4
A±
.016
FACE
0.8
L±
.031
.438
SHAFT TRIM
R – ROUND
F – FLATTED
K – KNURLED
SHAFT LENGTH
118 SERIES ONLY
FROM MOUNTING SURFACE
1/32" INCREMENTS
20 – .625" (15.9mm)
24 – .750" (19.1mm)
28 – .875" (22.2mm)
32 – 1.000" (25.4mm)
19.84
6.35
.781
.250
1.60
.063
RESISTANCE CODE
COD
E RESISTANCE
5A0 5 OHMS
500 50
101 100
501 500
102 1K
252 2.5K
502 5K
103 10K
203 20K
TAPER
1 – LINEAR
RESIST TOLERANCE
A– ±10%
B– ±20%
D– ± 5%
DIMENSION:
mm
CH
IN
2 - 2 © 2006 CTS Corporation. All rights reserved. Information subject to change.
9/30/06
CTS Electronic Components www.ctscorp.com
Loading...