Choosing an Electrical Switch
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Potentiometers
Vary electrical flow to control speed, volume, and light intensity. The number of turns affects the resolution—the higher the number, the better the control. Also known as variable output switches or rheostats. A knob is required (not included).
Switches with ball bearings have a smoother rotation and a longer service life than other potentiometers.
Shaft | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Turns | Wattage | For Panel Cutout Dia. | Dp. Behind Panel | Dia. | Dia. | Lg. | Housing Material | Wire Connection Type | No. of Terminals | Environmental Rating | Choose a Max. Resistance, kilohms | Each | ||
| A | 10 | 2 W @ 325 V AC | 7/16" | 1" | 7/8" | 1/4" | 1/2" | Plastic | Solder Lugs | 3 | IP65 | 0000000 | 000000 | |
| A | 10 | 2 W @ 447 V AC | 7/16" | 3/4" | 7/8" | 1/4" | 1/2" | Plastic | Solder Lugs | 3 | IP40 | 0000000 | 00000 | |
| A | 10 | 2 W @ 450 V AC | 7/16" | 3/4" | 7/8" | 1/4" | 1/2" | Plastic | Solder Lugs | 3 | IP40 | 0000000 | 00000 | |
| A | 5 | 1.5 W @ 273 V AC | 7/16" | 3/4" | 7/8" | 1/4" | 1/2" | Plastic | Solder Lugs | 3 | IP40 | 0000000 | 00000 | |
| B | 1 | 1 W @ 300 V AC | 7/16" | 7/16" | 7/8" | 1/4" | 1/2" | Plastic | Solder Lugs | 3 | IP40 | 0000000 | 00000 | |
| C | 10 | 5 W @ 1,000 V AC | 7/16" | 1 3/4" | 1 13/16" | 1/4" | 1/2" | Plastic | Solder Lugs | 3 | IP40 | 0000000 | 000000 | |
Digital Potentiometers
More precise than analog potentiometers, these have a three-digit display that is easy to read. Also known as variable output switches or rheostats, they vary electrical flow to control speed, volume, and light intensity.
Harsh Environment Potentiometers
Rated NEMA 13, these potentiometers protect against debris and splashing oil and coolant. Also known as variable output switches or rheostats, they vary electrical flow to control speed, volume, and light intensity.
NEMA 4X rated potentiometers withstand weather, washdowns, and corrosion.
NEMA 6 potentiometers seal out water from temporary submersion as well as weather and washdowns.
Actuator | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wattage @ Voltage | Max. Voltage | For Panel Cutout Dia. | Dp. Behind Panel | No. of Turns | Dia. | Material | Wire Connection Type | Environmental Rating | Specifications Met | Choose a Max. Resistance | Each | |
Plastic | ||||||||||||
| 2 W @ 120 V AC/ 2 W @ 24 V DC | 500V AC/500V DC | 7/8" (22 mm) | 2 1/4" | 1 | 1 1/8" | Plastic | Screw Terminals | NEMA 4X, NEMA 13, IP65 | UL Listed, C-UL Listed, CE Marked | 000000 | 000000 | |
Metal | ||||||||||||
| 2 W @ 300 V DC 2 W @ 300 V AC | 300V AC/300V DC | 1 3/16" (30 mm) | 1 15/16" | 1 | 1 1/8" | Plastic | Screw Terminals | NEMA 6, NEMA 13, IP65 | UL Listed, C-UL Listed, CSA Certified, CE Marked | 0000000 | 000000 | |
Panel Seals for Potentiometers
Create a seal around a potentiometer shaft to keep out moisture and dust.
For technical drawings and 3-D models, click on a part number.
Mounting Thread | ||||||||
|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Size | Pitch | Material | Includes | Specifications Met | Choose a Color | Each | |
UNEF | ||||||||
| 1/8" | 1/4"-32 | __ | Silicone Rubber | Mounting Nut | A-A-59588 | 000000000 | 00000 | |
| 1/4" | 3/8"-32 | __ | Silicone Rubber | Mounting Nut | A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component | 00000000 | 0000 | |
Metric | ||||||||
| 1/4" | M9 | 0.75 mm | Silicone Rubber | Mounting Nut | A-A-59588 | 000000000 | 0000 | |
| 1/4" | M10 | 0.75 mm | Silicone Rubber | Mounting Nut | A-A-59588 | 000000000 | 0000 | |
Variable-Speed Foot Switches
When the pedal is pressed, the built-in potentiometer adjusts the resistance to vary the speed for motor drives. These switches can be wired to either increase or decrease the current when actuated. All are rated NEMA 4 and 13 for protection from washdowns and oil/coolant spraying.
For technical drawings and 3-D models, click on a part number.
Mounting | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Circuits Controlled | Switch Starting Position | Switch Action | Industry Designation | Switching Current @ Voltage | No. of Terminals | Quick-Disconnect Tab Wd. | Conduit Trade Size | Environmental Rating | Fasteners Included | No. of Holes | Hole Dia. | Choose a Max. Resistance | Each | |
With Quick-Disconnect Terminals | ||||||||||||||
Iron Housing | ||||||||||||||
| 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 15 A @ 125 V AC/250 V AC | 3 | 0.187" | 3/4 | IP56 NEMA 4 NEMA 13 | No | 3 | 0.31" | 0000000 | 0000000 | |
Iron Housing with Aluminum Guard | ||||||||||||||
| 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 15 A @ 125 V AC/250 V AC | 3 | 0.187" | 3/4 | IP56 NEMA 4 NEMA 13 | No | 3 | 0.31" | 0000000 | 000000 | |
Turn-Counting Indicating Knobs
For monitoring the number of shaft turns on instrumentation, these knobs have easy-to-read scales or digits for quick and accurate readings. Use them on devices with round shafts. To secure these knobs in place, tighten the set screw.
Plastic knobs are a lightweight alternative to metal. They resist oil, grease, and solvents.
For technical drawings and 3-D models, click on a part number.
Indicating Knobs
Control devices with round or D-shaped shafts and view settings at a glance with a pointer.
Knobs for round shafts include a set screw to secure them in place.
Aluminum knobs have mild corrosion resistance, are lightweight, and are nonmagnetic.
For technical drawings and 3-D models, click on a part number.
Head | Hole | |||||
|---|---|---|---|---|---|---|
| Dia. | Ht. | Dia. | Dp. | Set Screw Included | Each | |
Style 8—Single Arm Grip | ||||||
Black Anodized Aluminum—For Round Shafts | ||||||
| 1/2" | 1" | 1/8" | 1/2" | Yes | 000000 | 000000 |