®
Commercial 15/16"
(24mm) Diameter,
5-Watt, Wirewound
Variable Resistors
•Fully enclosed construction
•5-watt power rating
•Compact size
•Superior resistance stability
•Tandem constructions available
•Economical
•Bushing or twist tab mounting
•Available with pull-push and rotary
power switches
•3% maximum linearity
Series 026
Technical Data Sheet 1448C
CTS CORPORATION / MANUFACTURER OF RELIABLE ELECTRONIC COMPONENTS
Electrical and Mechanical Specifications
Resistance Range
Linear: 1 ohm through 25K ohms
Resistance Tolerance
Standard: ±10%
Special: Tighter tolerance available in most
Power Rating, Watts
5 watts @25 C, 4watts@55 C, derated to
no load at 105 C, linear taper, bushing
mounted control on steel panel 4" x 4" x .050"
(101.6mm x 101.6mm x 1.27mm).
(Derating required on two section controls.)
Voltage Rating
Bushing to Terminals:
High pot test, one minute --- 1,000 VAC
Operating maximum --- 500 VDC
Across End Terminals:
350 VDC maximum, load not to exceed
wattage rating.
Resistance Tapers
Standard: Linear, 15% audio
Special: Consult factory
Taps
One tap at 50% of resistance and rotation available
on resistance values under 5K ohms.
Power Switches
Available in most constructions.
Angle of Rotation
Total Rotation:
Without switch --- 300 ±5
With switch --- 300 ±5
Effective Rotation:
Without switch --- 280 approximate
With switch --- 265 approximate
(continued on next page)
Technical Data Sheet 10/28/03 Rev A
Audio: 20 ohms through 10K ohms
resistance values
o
Operating Temperature
-10 C to +70 C
Turning Torque
0.75 to 6.0 IN.OZ. (45 to 360 g-cm)
Stop strength
Typical 8 to 15 Kg-cm (material dependent)
o
o
o
o
o
o
o
o
DIMENSION: MM
INCH
DIMENSION: MM
INCH
Shaft Information
Diameter: .250" (6.35mm)
Length: As required.
Trim: Round, flatted, knurled or with
a screwdriver slot
Rotational Life
Standard: 10,000 cycles
Special : 100,000 cycles
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.
Standard: .438" (11.1mm)
Special: .531" (13.5mm) available
Radius:
Special Features and Constructions
Terminals accepting solderless push-on connectors
available.
Straight or concentric tandem constructions.
Compatible with 450 series, 15/16" (24mm) diameter,
commercial composition variable resistor and can
be combined to make any combination of straight
or concentric tandem constructions with or without
switch.
T026 Metal Shaft, Bushing Mounting, Type "T" Solder Lug Terminals
C2-026 Printed Circuit Terminal Options
Bushing Information
Diameter: 3/ "-32 UNEF-2A thread.
Lengths:
Standard bushing: 3/8" (9.53mm) or 1/4" (6.35mm)
Special length: Available as required
Metric bushings available. Consult CTS.
8Mounting Hardware
Available upon request
DIMENSION: MM
INCH
DIMENSION: MM
INCH
DIMENSION: MM
INCH
C2-026 Concentric Tandem(Available in Two or More Sections) with Switch
PM-026 Twist Tab Mounting, Molded Rotor(Available in Metal Shafts)
K-026 Bushing Mounted, Single Section with Attached K Switch
K-026 (Pull-On Push Off)
RESIST TOL
A- ±10%
B- ±20%
C- ±30%
MOUNTING STYLE
BUSHING LENGTH:
1/8" INCREMENTS
EXAMPLES:
2- .250" (6.35MM)
3- .375" (9.53MM)
8- 1.000" (25.4MM)
1- TWIST TAB
MOUNT
A- .250" (6.35MM)
DIECAST
B- .375" (9.53MM)
DIECAST
BUSHING MOUNT SUPPLIED
WITH LOCATING LUG LEFT
SIDE TERMINALS DOWN
SHAFT LENGTH
FROM MOUNTING SURFACE
1/32" INCREMENTS
EXAMPLES:
20 - .625" (6.35MM)
24 - .750" (19.5MM)
28 - .875" (22.2MM)
32 - 1.000" (25.4MM)
TERMINAL STYLE
T- SOLDER LUG
X-PC
U- FORMED
TO FRONT
V- FORMED
TO REAR
Order From:
CTS CORPORATION / 406 Parr Road / Berne, Indiana 46711
TEL: (260)589-3111 / FAX: (260)589-3243
CTS COMPONENTS TAIWAN, LTD. / 7, Central 6th Road / Kaohsiung Export Processing Zone
Kaohsiung, Taiwan, Rep. of China
TEL: (07) 821-6145 / FAX: (07) 811-0040
Ordering Information
026 T 2 20 R 103 B 1 A 1
SHAFT TRIM
R- ROUND
F- FLATTED .375" X .156"
(9.53MM X 4.0MM)
K- KNURLED
S-S D SLOT .063" DEEP
X .047" WIDE
(1.6MM X 1.2MM) TAPER
1- LINEAR
2- 15% AUD
3- 15% CCW AUD
SPECIALS
2- LOCATING
LUG RIGHT
SIDE
3- NO
LOCATING
LUG
RESISTANCE CODE
EXAMPLES
CODE RESISTANCE
501 500 OHMS
102 1K
252 2.5K
502 5K
103 10K
253 25K
SWITCHES FUNCTION CTS TYPE
A- NONE
B- SPST ROTARY TGC
C- DPST ROTARY 027
D- SPDT ROTARY 028
E- SPST PULL-PUSH K-FR
F- SPST ROTARY GC-FR
SWITCHES UL RECOGNIZED
FILE NO. E10412
5A0 5 OHMS
1- LOCATING
LUG LEFT
SIDE
4- LOCATING
LUG BOTH
SIDE
D- ±5%
CURRENT RATING
6AMP@125VAC
1AMP@250VAC
3AMP@125VAC
1AMP@250VAC
3AMP@125VAC
3AMP@125VAC
3AMP@125VAC
1AMP@250VAC/DC
