Choosing an Electrical Switch
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Durable Disconnect Switches
Protected by a steel enclosure, these switches withstand tougher conditions than switches in a plastic housing. Also known as safety switches, they have quick-make/quick-break action to eliminate arcing and prolong switch life. They have a lockout to secure in the off position using a padlock (not included).
Switches with safety interlock keep the door closed when the switch is on and prevent the switch from turning on when the door is open.
Switches with a fuse holder are used where overload protection is needed. When the current exceeds the fuse’s rating, the fuse will blow, interrupting the circuit to prevent the switch from overheating, breaking, or causing a fire. These switches require rejection-style fuse clips when used with UL Class RK1, RK5, or T fuses. Note: Horsepower ratings are based on time-delay fuses installed.
Switches with a viewing window let you see if the fuses have blown without opening the enclosure.
For technical drawings and 3-D models, click on a part number.
Switches | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Switching | Rejection-Style Fuse Clips for RK1 and RK5 Fuse Class | |||||||||||||
Current, A | Voltage | Switch Action | Industry Designation | Electrical Phase (hp) | For No. of Wires | For Fuse Class | Ht. | Wd. | Environmental Rating | Specifications Met | Each | Each | ||
Enamel-Coated Steel with Black Actuator | ||||||||||||||
3 Circuits with Lockout, Safety Interlock | ||||||||||||||
100 | 600V AC/ 600V DC | Stays Switched (Maintained) | 3PDT | Single (20 hp @ 240 V AC) Single (40 hp @ 480 V AC) Single (40 hp @ 600 V AC) | 3 | __ | 29 15/16" | 12" | NEMA 1 | UL Listed | 000000 | 000000000 | 000000 | 00 |
3 Circuits with Lockout, Safety Interlock, Fuse Holder | ||||||||||||||
100 | 600V AC/ 600V DC | Stays Switched (Maintained) | 3PDT | Single (10 hp @ 480 V AC) Three (25 hp @ 480 V AC) Three (30 hp @ 600 V AC) | 3 | RK1, RK5, J, K5, H | 38 7/16" | 12" | NEMA 1 | UL Listed | 000000 | 00000000 | 000000 | 00 |
Enamel-Coated Steel with Black/Red Actuator | ||||||||||||||
3 Circuits with Lockout, Safety Interlock, Fuse Holder, Viewing Window | ||||||||||||||
100 | 600V AC/ 600V DC | Stays Switched (Maintained) | 3PST | Three (75 hp @ 600 V AC) | 4 | RK1, RK5, J, K5, H | 21 7/8" | 9" | NEMA 1 | UL Listed, CSA Certified | 0000000 | 000000 | 00000000 | 000000 |
Powder-Coated Steel with Red Actuator | ||||||||||||||
2 Circuits with Lockout, Safety Interlock, Fuse Holder | ||||||||||||||
100 | 240V AC/ 250V DC | Stays Switched (Maintained) | DPST | Single (15 hp @ 240 V AC) | 3 | RK1, RK5, K5, T, H | 23 1/8" | 11 3/4" | NEMA 1 | UL Listed | 0000000 | 000000 | 00000000 | 00000 |
3 Circuits with Lockout, Safety Interlock | ||||||||||||||
100 | 240V AC/ 250V DC | Stays Switched (Maintained) | 3PST | Single (15 hp @ 240 V AC) Three (30 hp @ 240 V AC) | 3 | __ | 23 1/8" | 11 3/4" | NEMA 1 | UL Listed | 0000000 | 000000 | 000000 | 00 |
3 Circuits with Lockout, Safety Interlock, Fuse Holder | ||||||||||||||
100 | 240V AC/ 250V DC | Stays Switched (Maintained) | 3PST | Single (15 hp @ 240 V AC) Three (30 hp @ 240 V AC) | 4 | RK1, RK5, K5, T, H | 23 1/8" | 11 3/4" | NEMA 1 | UL Listed | 0000000 | 000000 | 00000000 | 00000 |
Rejection-Style Fuse Clip for T Fuse Class | 00000000 | Each | 000000 |
Outdoor Durable Disconnect Switches
A raintight NEMA 3R rated enclosure protects these switches from falling liquids and light splashing. The enclosure is steel, so it withstands tougher conditions than plastic enclosures. All have quick-make/quick-break action to eliminate arcing and prolong switch life. They have a lockout to secure in the off position using a padlock (not included).
Switches with safety interlock keep the door closed when the switch is on, and prevent the switch from turning on when the door is open.
Use switches with a fuse holder where overload protection is needed. When the current exceeds the rating of the fuse, it blows. This interrupts the circuit and prevents overheating, damage, and fire. When used with UL Class RK1, RK5, or T fuses, they require rejection-style fuse clips. Note: Horsepower ratings are based on time-delay fuses installed.
Switches with a viewing window let you see if the fuses have blown without having to open the enclosure.
For technical drawings and 3-D models, click on a part number.
Switches | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Switching | Rejection-Style Fuse Clips for RK1 and RK5 Fuse Class | |||||||||||
Current, A | Voltage | Switch Action | Industry Designation | Electrical Phase (hp) | For No. of Wires | For Fuse Class | Ht. | Wd. | Each | Each | ||
Gray Enamel-Coated Steel with Black/Red Actuator | ||||||||||||
3 Circuits with Lockout, Safety Interlock, Fuse Holder, Viewing Window | ||||||||||||
100 | 600V AC/ 600V DC | Stays Switched (Maintained) | 3PST | Three (75 hp @ 600 V AC) | 4 | RK1, RK5, J, H | 22 1/8" | 9 1/16" | 0000000 | 000000000 | 00000000 | 000000 |
Gray Powder-Coated Steel with Red Actuator | ||||||||||||
2 Circuits with Lockout, Safety Interlock, Fuse Holder | ||||||||||||
100 | 240V AC/ 250V DC | Stays Switched (Maintained) | DPST | Single (15 hp @ 240 V AC) | 3 | RK1, RK5, K5, T, H | 23 1/8" | 12" | 0000000 | 000000 | 00000000 | 00000 |
3 Circuits with Lockout, Safety Interlock | ||||||||||||
100 | 240V AC/ 250V DC | Stays Switched (Maintained) | 3PST | Three (30 hp @ 240 V AC) | 3 | __ | 23 1/8" | 12" | 0000000 | 000000 | 000000 | 00 |
3 Circuits with Lockout, Safety Interlock, Fuse Holder | ||||||||||||
100 | 240V AC/ 250V DC | Stays Switched (Maintained) | 3PST | Single (15 hp @ 240 V AC) Three (30 hp @ 240 V AC) | 4 | RK1, RK5, K5, T, H | 23 1/8" | 12" | 0000000 | 000000 | 00000000 | 00000 |
Rejection-Style Fuse Clip for T Fuse Class | 00000000 | Each | 000000 |
Panel-Mount Disconnect Switches
Install these switches in a panel cutout. They cut power and keep it isolated to prevent equipment from starting up during inspection and maintenance. All are UL listed, C-UL listed, and CE marked—they meet American, Canadian, and European safety standards.
Switches with lockout secure in the off position with a padlock with a maximum shackle diameter of 5/16” (not included).
Add auxiliary contact blocks to send a signal or connect to another device, such as an alarm or indicating light.
Use additional power poles to control more than three circuits. Add neutral poles to open and close the neutral leg of a three phase system.
Terminal covers prevent contact with live terminals.
For technical drawings and 3-D models, click on a part number.
Switching | |||||||||
---|---|---|---|---|---|---|---|---|---|
Current, A | Voltage | Industry Designation | Electrical Phase (hp) | Ht. | Wd. | Dp. Behind Panel | Environmental Rating | Each | |
Yellow Plastic Housing with Red Actuator | |||||||||
Stays Switched (Maintained) | |||||||||
3 Circuits—For 3/8" Panel Cutout Dia. | |||||||||
100 | 600V AC | 3PST | Single (10 hp @ 240 V AC) Single (5 hp @ 120 V AC) Three (25 hp @ 240 V AC) | 3 3/4" | 3 3/4" | 2 11/16" | IP40 | 00000000 | 0000000 |
3 Circuits with Lockout—For 3/8" Panel Cutout Dia. | |||||||||
100 | 600V AC | 3PST | Single (10 hp @ 240 V AC) Single (5 hp @ 120 V AC) Three (25 hp @ 240 V AC) | 3 3/8" | 3 3/8" | 2 11/16" | IP40 | 00000000 | 000000 |
Gray Plastic Housing with Gray Actuator | |||||||||
Stays Switched (Maintained) | |||||||||
3 Circuits—For 3/8" Panel Cutout Dia. | |||||||||
100 | 600V AC | 3PST | Single (10 hp @ 240 V AC) Single (5 hp @ 120 V AC) Three (25 hp @ 240 V AC) | 3 3/4" | 3 3/4" | 2 11/16" | IP40 | 00000000 | 000000 |
3 Circuits with Lockout—For 3/8" Panel Cutout Dia. | |||||||||
100 | 600V AC | 3PST | Single (10 hp @ 240 V AC) Single (5 hp @ 120 V AC) Three (25 hp @ 240 V AC) | 3 3/8" | 3 3/8" | 2 11/16" | IP40 | 00000000 | 000000 |
"Main Switch" Label with Adhesive Back—13/16" Ht. × 3 3/16" Wd. | 0000000 | Each | 000000 |
Switching Current, A | Each | |
10 | 0000000 | 000000 |
Switching Current, A | Specifications Met | Each | |
100 | UL Listed, CE Marked | 00000000 | 000000 |
Switching Current, A | Specifications Met | Each | |
100 | UL Listed, CE Marked | 00000000 | 000000 |
For Current, A | Specifications Met | Each | |
80/100 | UL Listed, CE Marked | 00000000 | 000000 |
Enclosed Disconnect Switches
Cut power and keep it isolated to prevent equipment from starting up during inspection and maintenance. These switches are housed in a protective enclosure.
Switches with lockout secure in the off position with a padlock with a maximum shackle diameter of 5/16” (not included).
Add auxiliary contact blocks to send a signal or connect to another device, such as an alarm or indicating light.
Use additional power poles to control more than three circuits. Add neutral poles to open and close the neutral leg of a three phase system.
For technical drawings and 3-D models, click on a part number.
Switching | ||||||||
---|---|---|---|---|---|---|---|---|
Current, A | Voltage | Industry Designation | Electrical Phase (hp) | Ht. | Wd. | Environmental Rating | Each | |
Plastic Housing with Red Actuator | ||||||||
Stays Switched (Maintained) | ||||||||
3 Circuits | ||||||||
100 | 600V AC | 3PST | Single (5 hp @ 120 V AC) Single (10 hp @ 240 V AC) Three (25 hp @ 240 V AC) | 8 11/16" | 5 7/8" | IP40, NEMA 3 | 00000000 | 0000000 |
3 Circuits with Lockout | ||||||||
100 | 600V AC | 3PST | Single (5 hp @ 120 V AC) Single (10 hp @ 240 V AC) Three (25 hp @ 240 V AC) | 8 11/16" | 5 7/8" | IP40, NEMA 3 | 00000000 | 000000 |
Plastic Housing with Gray Actuator | ||||||||
Stays Switched (Maintained) | ||||||||
3 Circuits | ||||||||
100 | 600V AC | 3PST | Single (5 hp @ 120 V AC) Single (10 hp @ 240 V AC) Three (25 hp @ 240 V AC) | 8 11/16" | 5 7/8" | IP40, NEMA 3 | 00000000 | 000000 |
3 Circuits with Lockout | ||||||||
100 | 600V AC | 3PST | Single (5 hp @ 120 V AC) Single (10 hp @ 240 V AC) Three (25 hp @ 240 V AC) | 8 11/16" | 5 7/8" | IP40, NEMA 3 | 00000000 | 000000 |
"Main Switch" Label with Adhesive Back—13/16" Ht. × 3 3/16" Wd. | 0000000 | Each | 000000 |
Plastic Housing with Red Actuator | |||||
---|---|---|---|---|---|
For Switching Current | Ht. | Wd. | Dp. | Each | |
80A, 100A | 3 3/8" | 3 3/8" | 1 5/16" | 0000000 | 000000 |
Switching Current, A | Each | |
10 | 0000000 | 000000 |
Switching Current, A | Specifications Met | Each | |
100 | UL Listed, CE Marked | 00000000 | 000000 |
Switching Current, A | Specifications Met | Each | |
100 | UL Listed, CE Marked | 00000000 | 000000 |
For Current, A | Specifications Met | Each | |
80/100 | UL Listed, CE Marked | 00000000 | 000000 |
Enclosure Disconnect Switches
Install these switches inside an enclosure to prevent it from opening when power is on—turn the switch to disconnect power and release the door. Cut the shaft to fit the enclosure. Use a padlock (not included) to lock switches in the off position. Mount to DIN rail inside an enclosure; mounting depth is the distance from the panel door to the DIN rail. UL listed, C-UL listed, and CE marked, these switches meet American, Canadian, and European safety standards.
Use optional sealing gaskets in washdown environments; they create an IP65 rated seal around the actuator.
Add auxiliary contact blocks to send a signal or connect to another device, such as an alarm or indicating light.
Use additional power poles to control more than three circuits. Add neutral poles to open and close the neutral leg of a three phase system.
Add junction blocks to connect a ground wire.
Terminal covers prevent contact with live terminals.
Switching | |||||||||
---|---|---|---|---|---|---|---|---|---|
Current, A | Voltage | Electrical Phase (hp) | Ht. | Wd. | For DIN Rail Ht., mm | Mounting Dp. | Environmental Rating | Each | |
Yellow Plastic Housing with Red Actuator | |||||||||
3 Circuits with Lockout—For 1 3/16" Panel Cutout Dia. | |||||||||
100 | 600V AC | Single (5 hp @ 120 V AC) Single (10 hp @ 240 V AC) Three (10 hp @ 120 V AC) Three (25 hp @ 240 V AC) | 3 3/8" | 3 3/8" | 35 | 5 11/16"-16 1/2" | IP40 | 0000000 | 0000000 |
4 Circuits with Lockout—For 1 3/16" Panel Cutout Dia. | |||||||||
100 | 600V AC | Single (5 hp @ 120 V AC) Single (10 hp @ 240 V AC) Three (10 hp @ 120 V AC) Three (25 hp @ 240 V AC) | 3 3/8" | 3 3/8" | 35 | 5 11/16"-16 1/2" | IP40 | 0000000 | 000000 |
Gray Plastic Housing with Gray Actuator | |||||||||
3 Circuits with Lockout—For 1 3/16" Panel Cutout Dia. | |||||||||
100 | 600V AC | Single (5 hp @ 120 V AC) Single (10 hp @ 240 V AC) Three (10 hp @ 120 V AC) Three (25 hp @ 240 V AC) | 3 3/8" | 3 3/8" | 35 | 5 11/16"-16 1/2" | IP40 | 0000000 | 000000 |
For Switching Voltage, A | Each | |
80/100 | 0000000 | 00000 |
Switching Current, A | Specifications Met | Each | |
100 | UL Listed, CE Marked | 00000000 | 000000 |
Switching Current, A | Specifications Met | Each | |
100 | UL Listed, CE Marked | 00000000 | 000000 |
For Current, A | Specifications Met | Each | |
80/100 | UL Listed, CE Marked | 00000000 | 000000 |
Automatic Transfer Switches
When the microcontroller inside detects a power outage, these switches automatically fire up a backup generator. They’ll switch back to utility power once power is restored. To prevent injury and damage to your generator, they are open transition, meaning the contacts disconnect from one power source before connecting to another. This is also known as break-before-make switching. These switches also have built-in overload protection, so they can isolate themselves from utility power to protect your facility. LED status lights let you know which power source is in use. Add a padlock (not included) to the lockout to prevent unauthorized changes to the switch. Rated NEMA 1, these switches should only be used indoors.
They're compatible with generators that have a two-wire remote starting system.
NEMA 3R doors make these switches safe for use outdoors since they seal out rain, snow, and sleet. These doors cover the LED status lights on the switch when closed.
For technical drawings and 3-D models, click on a part number.
Transfer Switches | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Switching | Housing | NEMA 3R Doors | ||||||||||||
Current | Voltage | Circuit Breaker Breakthrough Current | Industry Designation | Electrical Phase | For Number of Wires | Housing Material | Ht. | Wd. | Dp. | Specifications Met | Each | Each | ||
NEMA 1 | ||||||||||||||
2 Circuits | ||||||||||||||
100A | 120V AC | 10,000A | DPDT | Single | 4 | Aluminum | 27 1/4" | 18 7/8" | 8 1/4" | UL Listed, UL 1008, NEC Article 702 | 0000000 | 000000000 | 00000000 | 0000000 |
3 Circuits | ||||||||||||||
100A | 120V AC | 10,000A | 3PDT | Three | 6 | Aluminum | 27 1/4" | 18 7/8" | 8 1/4" | UL Listed, UL 1008, NEC Article 701 | 0000000 | 00000000 | 00000000 | 000000 |
Circuit Board Relays
Smaller than relays with electrical wiring, these relays fit in compact devices. Mount them through holes on circuit boards with their solder pin terminals. Use them to control heaters, fans, and other high-power components from a low-power circuit.
For technical drawings and 3-D models, click on a part number.
Number of Terminals | Input Voltage | Control Current, mA | Switching Current @ Voltage | Max. Switching Voltage | Mechanical Life Cycles | Ht. | Wd. | Dp. | Pin Lg. | Each | |
Mechanical | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
2 Circuits Controlled with 2 Off (Normally Open)—DPST-NO | |||||||||||
14 | 12V DC | 240 | 100 A @ 400 V AC | 400V AC | 1,000,000 | 2.1" | 2.1" | 2.3" | 0.18" | 0000000 | 000000 |
14 | 24V DC | 120 | 100 A @ 400 V AC | 400V AC | 1,000,000 | 2.1" | 2.1" | 2.3" | 0.18" | 0000000 | 00000 |
Stud-Terminal Relays
These relays are suitable for DC-powered equipment such as forklifts, floor scrubbers, and trucks. They are rated for continuous operation for cycles that run longer than 30 seconds.
3-terminal relays require the same input and switching voltage. 4- and 6-terminal relays allow different input and switching voltages.
For technical drawings and 3-D models, click on a part number.
Number of Terminals | Input Voltage | Control Power, VA | Full Load Switching Current @ Voltage | Ht. | Wd. | Dp. | Stud Thread Size | Each | |
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO | |||||||||
---|---|---|---|---|---|---|---|---|---|
3 | 12V DC | 12 | 100 A @ 12 V DC | 3.6" | 3.1" | 2.2" | 5/16"-24 | 0000000 | 000000 |
4 | 12V DC | 12 | 100 A @ 12 V DC | 3.6" | 3.1" | 2.2" | 5/16"-24 | 0000000 | 00000 |
4 | 24V DC | 12 | 100 A @ 24 V DC | 3.6" | 3.1" | 2.2" | 5/16"-24 | 0000000 | 00000 |
4 | 36V DC | 12 | 100 A @ 36 V DC | 3.6" | 3.1" | 2.2" | 5/16"-24 | 0000000 | 00000 |
1 Circuit Controlled with 1 Off (Normally Open) or 1 On (Normally Closed)—SPDT | |||||||||
6 | 12V DC | 12 | 100 A @ 12 V DC | 4.7" | 3.1" | 2.2" | 5/16"-24 | 0000000 | 00000 |
6 | 24V DC | 12 | 100 A @ 24 V DC | 4.7" | 3.1" | 2.2" | 5/16"-24 | 0000000 | 000000 |
6 | 36V DC | 12 | 100 A @ 36 V DC | 4.7" | 3.1" | 2.2" | 5/16"-24 | 0000000 | 00000 |
Water-Resistant Stud-Terminal Relays
Sealed to keep out water, these relays are often used for DC-powered equipment such as forklifts, floor scrubbers, and trucks. They are rated for continuous operation for cycles that run longer than 30 seconds.
For technical drawings and 3-D models, click on a part number.
Number of Terminals | Input Voltage | Control Power, VA | Full Load Switching Current @ Voltage | Ht. | Wd. | Dp. | Stud Thread Size | Each | |
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO | |||||||||
---|---|---|---|---|---|---|---|---|---|
4 | 12V DC | 8.1 | 100 A @ 12 V DC | 2.9" | 3.3" | 2.1" | 5/16"-24 | 0000000 | 000000 |
4 | 24V DC | 8.1 | 100 A @ 24 V DC | 2.9" | 3.3" | 2.1" | 5/16"-24 | 0000000 | 00000 |
4 | 36V DC | 8.1 | 100 A @ 36 V DC | 2.9" | 3.3" | 2.1" | 5/16"-24 | 0000000 | 00000 |
1 Circuit Controlled with 1 Off (Normally Open) or 1 On (Normally Closed)—SPDT | |||||||||
6 | 12V DC | 12 | 100 A @ 12 V DC | 4.6" | 3.3" | 2.9" | 5/16"-24 | 0000000 | 00000 |
6 | 24V DC | 12 | 100 A @ 24 V DC | 4.6" | 3.3" | 2.9" | 5/16"-24 | 0000000 | 000000 |