Series 450
®
Industrial 15/16"
(24mm) diameter
1/2 watt composition
variable resistor
• Low cost
• Versatile mounting styles:
– bushing
– twist tab
– bend tab
– snap-in PC bracket
– solder lug or PC terminals
• Wide resistance range
• Molded or metal shafts
• Pull-push and rotary power switches
• Shaft and bushing waterseal
• Rear extended shaft
• Single, tandem, or concentric constructions
• Special vernier adjust (multiturn) construction
available for fine adjustment
• Long life construction available
Electrical and Mechanical Specifications
Resistance Range
100
Ω
through 10 Meg
Ω
(linear taper)
Long life construction - 10K
Ω
through 5 Meg
Ω
(linear taper)
Power Rating, Watts
Vernier Adjust Construction
1
/
2
watt 10K ohms,
1
/
3
watt; above 10K ohms through
100K ohms,
1
/
4
watt above 100K ohms. Full rating @
55°C derated to no load at 85°C, linear taper,
bushing mounted control on steel panel 4" x 4" x
.050" (101.6mm x 101.6mm x 1.27mm).
Voltage Rating
Bushings to Terminals:
High pot test, one minute
Standard construction – 1080VAC
Vernier construction – 1000VAC
Operating maximum – 750VDC
Across End Terminals:
500 VDC, load not to exceed listed wattage ratings.
Special requirement for 1500 VAC Hi-pot is
available.
(continued on next page)
Resistance Tolerance
Standard: ±20%
Special: Closer tolerances available in most resistance
values.
Power Rating, Watts
Standard Construction
1
/
2
watt per section through 100K
1
/
3
watt per section above 100K
Full rating @ 55°C derated to no load at 85°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.)
Technical Data Sheet 1448C
Technical Data Sheet 1450B
CTS CORPORATION /
MANUFACTURER OF RELIABLE ELECTRONIC COMPONENTS
Electrical and Mechanical Specifications
(continued)
Resistance Tapers
Standard – Linear,10% Audio and 10% CCW Audio
Special – Consult factory
Typical Constructions
The following is basic information on the most
common CTS
15
/
16
" (24mm) diameter composition
variable resistor constructions supplied to our
customers. Space limitations prohibit showing the
virtually thousands of additional constructions fabri-
cated to exacting customer specifications. For your
special applications the CTS engineering staff is
at your disposal for designing the best and most
economical construction to meet your requirements.
Angle of Rotation
Standard Construction
Total with rotary switch — 320° ± 5°
Total without switch or with push-pull or push-
push
switches — 300° ± 5°
Vernier Adjust Construction
Contact arm 300° ± 5°
Shaft* VA-450 – 3700° – 10
1
/
4
turns (1° for each
12.5°)
*total effective rotation 5VA-450 – 2000° – 51/2 turns (1° for each 6.6°
Long Life Construction
Total without switch -300° ±
5°
Effective Rotation
With or without switch — 300° (approximate)
With fixed resistor — 225° (approximate)
Bushing Information
Diameter: EIA Standard
3
/
8
"-32 UNEF-2A thread.
Standard Length:
3
/
8
" or
1
/
4
" (9.53mm or 6.35mm)
Special Lengths: Available as required.
Metric bushings available. Consult CTS.
Locating Lugs (Bushing Mounted Style)
Standard Position: Left side (terminals down)
supplied unless otherwise specified.
Other Positions: Available with lug right side
(terminals down), without lugs or with lugs
both left and right side.
Shaft Information
Molded Shafts —
Length: Standard — Flatted or knurled shafts
available up to 1
1
/
2
" (38.1mm) in
1
/
8
" (3.2mm) increments.
Special — Some molded shaft designs
available up to 2" (50.8mm).
Diameter: .250" (6.35mm) [Diameter over knurl —
.240" – .246" (6.10mm – 6.25mm)].
Color:
Colors are available.
Solid Metal Shafts: Brass or Aluminum —
Length: Standard — Up to 3" in
1
/
8
" increments.
Special — Up to 12" (304.8mm).
Diameter: Standard — .250" (6.35mm)
Special — .187" (4.75mm)
Metal Tubing Shafts —
Length: Standard — Up to 3" (76.2mm)
Special — Consult CTS
Outside Diameter: .265" (6.73mm)
Real Extended Shafts —
Metal or molded rear extended shafts available.
Vernier Constructions
This construction is designed for fine tuning
applications. It provides precision adjustments with a
vernier ratio of 6.6˚ or 12.5˚ per degree available in
5
1
/
2
or 10
1
/
4
turns.
Long Life Construction
This construction provides an extended life of 250,000
cycles (with a limited rotation angle) and is available
with resistance ranging from 10K ohm to 5 megohm,
linear tapers only. Consult CTS.
450
Metal Shaft, Bushing Mounting, Type “T” Solder Lug Terminals
DIMENSION:
MM
INCH
450
Metal Shaft, Bushing Mounting, Type “X” or “Y” P.C. Terminals
DIMENSION:
MM
INCH
455
Note .296 in (7.52 mm) Terminal Spacing
DIMENSION:
MM
INCH
450
Rear Extended Metal Shaft, Twist Tab Mounting with Type “U” P.C. Terminals
DIMENSION:
MM
INCH
450
Screwdriver Slotted Molded Rotor, Twist Tab Mounting, Type “W” Wirewrap Terminals
DIMENSION:
MM
INCH
450
Tandem Construction, Metal Shaft, Twist Tab Mounting, Type “X” or “Y” P.C. Terminals
DIMENSION:
MM
INCH
455
Note .296in (7.52 mm) Terminal Spacing
DIMENSION:
MM
INCH
Concentric Tandem Construction, Concentric Metal Shafts, Bushing Mounting, Type “T” Solder Lug Terminals
DIMENSION:
MM
INCH
4 Section Concentric Tandem Construction, Concentric Metal Shafts, Bushing Mounting,
Type “T” Solder Lug Terminals
DIMENSION:
MM
INCH
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