About Motor Switches and Starters
More
Choosing an Electrical Switch
More
Motor Switches
Use these switches to turn motors on and off, or to control lighting and electric heat circuits. They do not provide overload protection.
For technical drawings and 3-D models, click on a part number.
Switching | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Circuits Controlled | Electrical Phase (hp) | Switch Starting Position | Industry Designation | Current, A | Voltage | Ht. | Wd. | Wire Connection Type | Specifications Met | Each | |
Stays Switched (Maintained) | |||||||||||
| 2 | Single (5 hp @ 240 V AC) | 2 Off (Normally Open) | DPST-NO | 60 | 600V AC | 3.8" | 1.7" | Screw Terminals | UL Listed, CSA Certified | 0000000 | 0000000 |
| 3 | Three (10 hp @ 240 V AC) | 3 Off (Normally Open) | 3PST-NO | 60 | 600V AC | 3.8" | 1.7" | Screw Terminals | UL Listed, CSA Certified | 0000000 | 000000 |
Enclosed Motor Switches
These switches are housed in a plastic enclosure. Since they’re already protected, you can mount them to a wall if there’s no space left in your electrical panel. You can also turn them into a handheld control and move them around your workstation by attaching a cord and cord grip. The enclosure is PBT polyester, so it won’t swell in moist environments. Easy to operate even if you’re wearing gloves, flip the toggle switch up and down. Use these switches to turn motors on and off, or with lighting and electric heat circuits. They do not provide overload protection.
For technical drawings and 3-D models, click on a part number.
Switching | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Circuits Controlled | Electrical Phase (hp) | Switch Starting Position | Industry Designation | Current, A | Voltage | Ht. | Wd. | Wire Connection Type | Environment | Environmental Rating | Specifications Met | Each | |
Stays Switched (Maintained) | |||||||||||||
| 2 | Single (5 hp @ 240 V AC) | 2 Off (Normally Open) | DPST-NO | 60 | 600V AC | 4.5" | 4.7" | Screw Terminals | Indoor Only | NEMA 1 | UL Listed, CSA Certified | 0000000 | 0000000 |
| 3 | Three (10 hp @ 240 V AC) | 3 Off (Normally Open) | 3PST-NO | 60 | 600V AC | 4.5" | 4.7" | Screw Terminals | Indoor Only | NEMA 1 | UL Listed, CSA Certified | 0000000 | 000000 |
Energy-Saving Motor Starters
Save electricity and extend motor life by reducing the motor's starting current. These starters gradually start and stop motors. Use them on motors where torque varies, such as pumps, compressors, and conveyors. All have an auxiliary contact to send a signal or connect to another device, such as an alarm or indicating light.
For technical drawings and 3-D models, click on a part number.
Switching | Time, sec. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Full Load Current, A | Input Voltage | Voltage | Current | Electrical Phase (hp) | Acceleration | Deceleration | Ht. | Wd. | Mount. Location | Each | |
Motor Starters with 1 Auxiliary Contact—1 Off (Normally Open) | |||||||||||
| 59 | 24V DC | 208-600V AC | 60A | Three (20 hp @ 240 V AC) Three (40 hp @ 480 V AC) | 1-20 | 0-20 | 8.7" | 2.8" | Surface | 0000000 | 0000000 |
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 | ||||||||||||||
| 60 | 600V AC/ 600V DC | Stays Switched (Maintained) | 3PDT | Single (10 hp @ 240 V AC) Single (25 hp @ 480 V AC) Single (30 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 | ||||||||||||||
| 60 | 600V AC/ 600V DC | Stays Switched (Maintained) | 3PDT | Single (5 hp @ 480 V AC) Three (15 hp @ 480 V AC) Three (15 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, Viewing Window | ||||||||||||||
| 60 | 600V AC/ 600V DC | Stays Switched (Maintained) | 3PST | Single (30 hp @ 600 V AC) Three (60 hp @ 600 V AC) | 3 | __ | 18 1/8" | 9" | NEMA 1 | UL Listed, CSA Certified | 0000000 | 000000 | 000000 | 00 |
3 Circuits with Lockout, Safety Interlock, Fuse Holder, Viewing Window | ||||||||||||||
| 60 | 600V AC/ 600V DC | Stays Switched (Maintained) | 3PST | Three (50 hp @ 600 V AC) | 3 | RK1, RK5, J, K5, H | 18 1/8" | 9" | NEMA 1 | UL Listed, CSA Certified | 0000000 | 000000 | 00000000 | 000000 |
| 60 | 600V AC/ 600V DC | Stays Switched (Maintained) | 3PST | Three (50 hp @ 600 V AC) | 4 | RK1, RK5, J, K5, H | 18 1/8" | 9" | NEMA 1 | UL Listed, CSA Certified | 0000000 | 000000 | 00000000 | 00000 |
Powder-Coated Steel with Red Actuator | ||||||||||||||
2 Circuits with Lockout, Fuse Holder | ||||||||||||||
| 60 | 240V AC/ 250V DC | Stays Switched (Maintained) | DPST | Single (10 hp @ 240 V AC) | 3 | RK1, RK5, K5, H | 10 1/16" | 6 7/16" | NEMA 1 | UL Listed | 0000000 | 000000 | 00000000 | 00000 |
3 Circuits with Lockout, Fuse Holder | ||||||||||||||
| 60 | 240V AC/ 250V DC | Stays Switched (Maintained) | 3PST | Single (10 hp @ 240 V AC) Three (15 hp @ 240 V AC) | 4 | RK1, RK5, K5, H | 10 1/16" | 6 7/16" | NEMA 1 | UL Listed | 0000000 | 000000 | 00000000 | 00000 |
3 Circuits with Lockout | ||||||||||||||
| 60 | 240V AC/ 250V DC | Stays Switched (Maintained) | 3PST | Three (15 hp @ 240 V AC) | 3 | __ | 8 9/16" | 5 7/16" | NEMA 1 | UL Listed | 0000000 | 000000 | 000000 | 00 |
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 | ||||||||||||
| 60 | 600V AC/ 600V DC | Stays Switched (Maintained) | 3PST | Single (30 hp @ 240 V AC) Three (60 hp @ 600 V AC) | 3 | __ | 18 1/2" | 9 1/16" | 0000000 | 0000000 | 000000 | 00 |
| 60 | 600V AC/ 600V DC | Stays Switched (Maintained) | 3PST | Three (50 hp @ 600 V AC) | 3 | RK1, RK5, J, H | 17 1/2" | 10 1/2" | 0000000 | 000000 | 00000000 | 000000 |
| 60 | 600V AC/ 600V DC | Stays Switched (Maintained) | 3PST | Three (50 hp @ 600 V AC) | 4 | RK1, RK5, J, H | 18 1/2" | 9 1/16" | 0000000 | 000000 | 00000000 | 00000 |
Gray Powder-Coated Steel with Red Actuator | ||||||||||||
2 Circuits with Lockout, Fuse Holder | ||||||||||||
| 60 | 240V AC/ 250V DC | Stays Switched (Maintained) | DPST | Single (10 hp @ 240 V AC) | 3 | RK1, RK5, K5, H | 10 1/16" | 6 7/16" | 0000000 | 000000 | 00000000 | 00000 |
3 Circuits with Lockout | ||||||||||||
| 60 | 240V AC/ 250V DC | Stays Switched (Maintained) | 3PST | Three (15 hp @ 240 V AC) | 3 | __ | 8 9/16" | 5 7/16" | 0000000 | 000000 | 000000 | 00 |
3 Circuits with Lockout, Fuse Holder | ||||||||||||
| 60 | 240V AC/ 250V DC | Stays Switched (Maintained) | 3PST | Single (10 hp @ 240 V AC) Three (15 hp @ 240 V AC) | 4 | RK1, RK5, K5, H | 10 1/16" | 6 7/16" | 0000000 | 000000 | 00000000 | 00000 |
Harsh Environment Panel-Mount Disconnect Switches
Rated IP69K, these switches withstand high-pressure, high-temperature washdowns. They cut power and keep it isolated to prevent equipment from starting up during inspection and maintenance. All have a lockout so you can secure them in the off position with a padlock (not included).
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 | Each | |
Yellow Stainless Steel Housing with Red Actuator | ||||||||
Stays Switched (Maintained) | ||||||||
3 Circuits with Lockout—For 7/8" Panel Cutout Dia. | ||||||||
| 60 | 600V AC | 3PST | Single (3 hp @ 120 V AC) Single (7 1/2 hp @ 240 V AC) Three (15 hp @ 240 V AC) | 4 5/16" | 4 5/16" | 3 3/8" | 00000000 | 0000000 |
Gray Stainless Steel Housing with Gray Actuator | ||||||||
Stays Switched (Maintained) | ||||||||
3 Circuits with Lockout—For 7/8" Panel Cutout Dia. | ||||||||
| 60 | 600V AC | 3PST | Single (3 hp @ 120 V AC) Single (7 1/2 hp @ 240 V AC) Three (15 hp @ 240 V AC) | 4 5/16" | 4 5/16" | 3 3/8" | 00000000 | 000000 |
| "Main Switch" Label with Adhesive Back—13/16" Ht. × 3 3/16" Wd. | 0000000 | Each | 000000 |
Washdown Enclosed Disconnect Switches
Rated IP66, these switches are protected from washdowns. They cut power and keep it isolated to prevent equipment from starting up during inspection and maintenance.
Switches with lockout secure in the off position with a padlock with a maximum shackle diameter of 5/16” (not included).
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 | Switch Action | Industry Designation | Electrical Phase (hp) | Ht. | Wd. | Each | |
Stainless Steel Housing with Red Actuator | ||||||||
3 Circuits with Lockout | ||||||||
| 60 | 600V AC | Stays Switched (Maintained) | 3PST | Single (3 hp @ 120 V AC) Single (7 1/2 hp @ 240 V AC) Three (15 hp @ 240 V AC) | 7 7/8" | 5 15/16" | 0000000 | 0000000 |
| "Main Switch" Label with Adhesive Back—13/16" Ht. × 3 3/16" Wd. | 0000000 | Each | 000000 |
| Switching Current, A | Specifications Met | Each | |
| 60 | UL Listed, C-UL Listed, CE Marked | 00000000 | 000000 |
DIN-Rail Mount Solid State Relays
Unlike mechanical relays, these solid state relays have no moving parts, so they require less maintenance and last longer, switch faster, and are quieter. They mount on 35 mm DIN rail (also known as DIN 3) for fast installation. IP20 rated, their terminals are recessed, so they prevent fingers and other objects from touching live circuits.
Relays with an integrated heat sink disperse heat to increase the relay’s current rating.
For technical drawings and 3-D models, click on a part number.
| Number of Terminals | Input Voltage | Control Current, mA | Switching Current @ Voltage (Load Type) | Max. Switching Voltage | hp @ Switching Voltage | Ht. | Wd. | Dp. | Features | Each | |
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Single Phase | |||||||||||
| 4 | 5V DC, 6V DC, 12V DC, 24V DC, 30V DC | 11 | 60 A @ 600 V AC (Full Load) | 660V AC | 1 1/2 hp @ 115 V AC 3 hp @ 230 V AC | 4.33" | 2.76" | 5.24" | Integrated Heat Sink, LED Indicator | 0000000 | 0000000 |
Infrequent-Cycle Relays
For use with equipment that cycles on and off, these relays meet UL 508 for air conditioning and heating. Connections are accessible from the front, so you can mount relays side-by-side. Also known as definite-purpose contactors.
Enclosures (sold separately) are NEMA 1 rated to protect contacts from corrosion.
Also Available: Auxiliary contacts for 3.8"-7.2" Ht. relays. They allow you to add a signaling device or control another relay. Please select 6564K99, then select the McMaster-Carr part number of your relay and whether you want to switch one circuit on (1 Normally Open) or off (1 Normally Closed).
For technical drawings and 3-D models, click on a part number.
Switching Current @ 600V AC | hp @ Switching Voltage | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of Terminals | Input Voltage | Control Power | Full Load | Resistive Load | Single Phase | Three Phase | Ht. | Wd. | Dp. | Quick-Disconnect Tab Wd. | Each | |
2 Circuits Controlled with 2 Off (Normally Open)—DPST-NO | ||||||||||||
With Quick-Disconnect and Screw Terminals | ||||||||||||
| 4 | 24V AC | 50.4VA | 60A | 75A | 5 hp @ 115 V AC 10 hp @ 230 V AC | 20 hp @ 230 V AC 40 hp @ 460 V AC 40 hp @ 575 V AC | 3.8" | 2.6" | 4" | 0.25" | 00000000 | 0000000 |
| 4 | 120V AC | 50.4VA | 60A | 75A | 5 hp @ 115 V AC 10 hp @ 230 V AC | 20 hp @ 230 V AC 40 hp @ 460 V AC 40 hp @ 575 V AC | 3.8" | 2.6" | 4" | 0.25" | 00000000 | 000000 |
| 4 | 24V DC | 5.1W | 60A | 75A | 5 hp @ 115 V AC 10 hp @ 230 V AC | 20 hp @ 230 V AC 40 hp @ 460 V AC 40 hp @ 575 V AC | 3.8" | 2.6" | 4" | 0.25" | 00000000 | 000000 |
| 4 | 208V AC, 240V AC | 50.4VA | 60A | 75A | 5 hp @ 115 V AC 10 hp @ 230 V AC | 20 hp @ 230 V AC 40 hp @ 460 V AC 40 hp @ 575 V AC | 3.8" | 2.6" | 4" | 0.25" | 00000000 | 000000 |
3 Circuits Controlled with 3 Off (Normally Open)—3PST-NO | ||||||||||||
With Quick-Disconnect and Screw Terminals | ||||||||||||
| 6 | 24V AC | 50.4VA | 60A | 75A | 5 hp @ 115 V AC 10 hp @ 230 V AC | 20 hp @ 230 V AC 40 hp @ 460 V AC 40 hp @ 575 V AC | 3.8" | 2.6" | 4" | 0.25" | 00000000 | 000000 |
| 6 | 120V AC | 50.4VA | 60A | 75A | 5 hp @ 115 V AC 10 hp @ 230 V AC | 20 hp @ 230 V AC 40 hp @ 460 V AC 40 hp @ 575 V AC | 3.8" | 2.6" | 4" | 0.25" | 00000000 | 000000 |
| 6 | 24V DC | 5.1W | 60A | 75A | 5 hp @ 115 V AC 10 hp @ 230 V AC | 20 hp @ 230 V AC 40 hp @ 460 V AC 40 hp @ 575 V AC | 3.8" | 2.6" | 4" | 0.25" | 00000000 | 000000 |
| 6 | 208V AC, 240V AC | 50.4VA | 60A | 75A | 5 hp @ 115 V AC 10 hp @ 230 V AC | 20 hp @ 230 V AC 40 hp @ 460 V AC 40 hp @ 575 V AC | 3.8" | 2.6" | 4" | 0.25" | 00000000 | 000000 |
| Enclosures for 60A 3PST-NO Relays and 4PST-NO Relays | 00000000 | Each | 0000000 |