Choosing an Electrical Switch
More
Metal 30 mm Panel-Mount Lever Switches
Rated NEMA 4, 13, and IP66, these switches are protected from washdowns and oil/coolant spraying. They include enough contact blocks to control the number of circuits listed. The contact block is rated IP20.
Three-position switches are off in the center position.
Additional contact blocks (sold separately) can be added to control more circuits, or to replace the included contact block.
For technical drawings and 3-D models, click on a part number.
| Lever Lg. | No. of Circuits Controlled | Switch Starting Position | Switch Action | No. of Terminals | Industry Designation | Switching Current @ Voltage | Max. Voltage  | Dia. | Dp. Behind Panel | For Max. No. of Contact Blocks | Actuator Color | Each | |
3 Position | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
With Screw Terminals | |||||||||||||
| 15/16" | 4 | 2 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 8 | 4PST-2NO/2NC | 6 A @ 120 V AC, 2.5 A @ 24 V DC | 600V AC 600V DC | 1 5/16" | 2 3/4" | 4 | Black | 000000 | 0000000 |
| No. of Circuits Controlled | Switch Starting Position | No. of Terminals | Industry Designation | Specifications Met | Each | |
| 1 | 1 Off (Normally Open) | 2 | SPST-NO | CSA Certified, EN 60947-1, EN 60947-5-1, EN 60947-5-4, IEC 60947-1, IEC 60947-5-1, IEC 60947-5-4 | 0000000 | 000000 |
| 1 | 1 On (Normally Closed) | 2 | SPST-NC | CSA Certified, EN 60947-1, EN 60947-5-1, EN 60947-5-4, IEC 60947-1, IEC 60947-5-1, IEC 60947-5-4 | 0000000 | 00000 |
| 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | 4 | DPST-1NO/1NC | CSA Certified, EN 60947-1, EN 60947-5-1, EN 60947-5-4, IEC 60947-1, IEC 60947-5-1, IEC 60947-5-4 | 0000000 | 00000 |
22 mm Panel-Mount Build-Your-Own Plastic Switches
Choose an actuator and contact block to make your own switch. Actuators are rated NEMA 3S, 4X and 13 for protection from dust, outdoor environments, corrosion, oil, and washdowns. Use legend plates (not included) to label switches. BACO Controls switches are only compatible with BACO manufactured legend plates.
Contact blocks with mounting latch accept additional contact blocks to control more circuits.
For technical drawings and 3-D models, click on a part number.
| No. of Circuits Controlled | Switch Starting Position | No. of Terminals | Industry Designation | Switching Current @ Voltage | Max. Voltage | Dp. Behind Panel | Wire Connection Type | Environmental Rating | Specifications Met | Each | |
| 4 | 2 Off (Normally Open) and 2 On (Normally Closed) | 8 | 4PST-2NO/2NC | 6 A @ 120 V AC, 2.5 A @ 24 V DC | 600V AC 600V DC | 2" | Screw Terminals | IP20 | UL Listed, C-UL Listed, CE Marked | 0000000 | 000000 |
| Replacement Contact Retaining Clip | 000000 | Each | 00000 |
| No. of Circuits Controlled | Switch Starting Position | No. of Terminals | Industry Designation | Switching Current @ Voltage | Max. Voltage | Dp. Behind Panel | Wire Connection Type | Environmental Rating | Specifications Met | Choose a Bulb Voltage | Choose a Bulb Color | Each | |
| 4 | 2 Off (Normally Open) and 2 On (Normally Closed) | 10 | 4PST-2NO/2NC | 6 A @ 120 V AC, 2.5 A @ 24 V DC | 600V AC 600V DC | 2 9/16" | Screw Terminals | IP20 | UL Listed, C-UL Listed, CE Marked | 0000000 | 000000 |
| Replacement Contact Retaining Clip | 000000 | Each | 00000 |
| No. of Circuits Controlled | Switch Starting Position | No. of Terminals | Industry Designation | Environmental Rating | Specifications Met | Each | |
| 1 | 1 Off (Normally Open) | 2 | SPST-NO | IP20 | UL Listed, C-UL Listed, CE Marked | 000000 | 00000 |
Frame-Mounted Safety Switches
Also known as interlock switches, these ensure the safety of personnel by automatically shutting off power to machinery when an access door opens. Mount the switch to the door frame and mount a key to the door so that the key is inserted into the switch when the door is closed. When the door opens, the key is removed from the switch and the machine shuts down. They’re often used with machine guards.
IP67 rated switches protect against temporary submersion.
Flexible keys (sold separately) pivot 15° to make it easier to align with the switch during installation.
For technical drawings and 3-D models, click on a part number.
Housing | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Style | No. of Circuits Controlled | Switch Starting Position | Switch Action | No. of Terminals | Industry Designation | Switching Current @ Voltage | Max. Voltage | Ht. | Wd. | Dp. | Conduit Trade Size | Key Included | Environmental Rating | Each | |
Screw Terminal Connection with Rotating Head | |||||||||||||||
| G | 4 | 2 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 8 | 4PST-2NO/2NC | 2.5 A @ 120 V AC, 1 A @ 125 V DC | 120V AC 125V DC | 7.1" | 1.5" | 1.5" | 1/2 | No | IP67 | 00000000 | 0000000 |
Access-Delay Frame-Mounted Safety Switches
Delay access to hazardous areas until conditions are safe; use these switches with machines that take time to stop after they are turned off. Mount the switch to the door frame and mount the key to the door so that the key is inserted into the switch when the door is closed. When the door is pulled, the key is held in place with 225 lbs. of force until the switch receives a signal from a time-delay relay, motion sensor, or position sensor (not included) that the machine’s motion has stopped. After the motion has stopped, the key can be removed from the switch, releasing the access door. They’re often used with machine guards. All have positive-force, normally-closed contacts that will open a circuit when the switch is actuated even if a spring fails or the contacts stick. They’re rated for protection from washdowns and temporary submersion.
Style C has a key entry on two opposite sides of the switch.
For technical drawings and 3-D models, click on a part number.
Housing | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Style | No. of Circuits Controlled | Switch Starting Position | Switch Action | No. of Terminals | Industry Designation | Switching Current @ Voltage | Max. Voltage | Input Voltage | Holding Force, lbs. | Ht. | Wd. | Dp. | Wire Connection Type | Conduit Trade Size | Each | |
Positive-Force Normally Closed Contacts and Rotating Head | ||||||||||||||||
| C | 4 | 2 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 8 | 4PST-2NO/2NC | 4 A @ 120 V AC, 4 A @ 24 V DC | 240V AC 24V DC | 24V AC, 24V DC | 225 | 7.6" | 1.2" | 1.6" | Screw Terminals | 1/2 | 0000000 | 0000000 |
DIN-Rail Mount Touch-Safe Screw Terminal Relays
Quickly and safely mount these relays on 35 mm DIN rail (also known as DIN 3). IP20 rated, they have recessed terminals that prevent fingers and other objects from touching live circuits.
Relays that control 3 and 4 circuits are built to IEC dimensional standards and are often called IEC contactors.
Auxiliary contacts (sold separately) allow you to add a signaling device or control another relay. You can add one auxiliary contact to all of these relays.
Control | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Number of Terminals | Input Voltage | Current, mA | Switching Current @ Voltage (Load Type) | Max. Switching Voltage | Ht. | Wd. | Dp. | Each | |
4 Circuits Controlled with 2 Off (Normally Open) and 2 On (Normally Closed)—4PST-2NO/2NC | |||||||||
| 10 | 24V DC | 133 | 10 A @ 600 V AC | 600 V AC | 2.3" | 1.7" | 2.2" | 0000000 | 0000000 |
| Number of Circuits Controlled | For Relay Width | Switch Starting Position | Industry Designation | Mounting Location | Each | |
| 2 | 1.7" | 1 Off (Normally Open) and 1 On (Normally Closed) | DPST-1NO/1NC | Front | 00000000 | 000000 |
Screw Terminal Relays
Use the screw terminals to hardwire these relays. The built-in enclosure protects contacts from dust and dirt. These relays accept voltage drops up to 50% of the rated voltage without switching. They’re often used with industrial automation systems, security and emergency lighting, and small motors. Also known as power relays.
Switching Current @ Voltage | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of Terminals | Input Voltage | Control Current, mA | Off (Normally Open) Circuit Position | On (Normally Closed) Circuit Position | Maximum Switching Voltage | hp @ Switching Voltage | Ht. | Wd. | Dp. | Each | |
4 Circuits Controlled with 2 Off (Normally Open) and 2 On (Normally Closed)—4PST-2NO/2NC | |||||||||||
| 10 | 120V AC | 22 | 25 A @ 240 V AC/24 V DC | 8 A @ 240 V AC/24 V DC | 250V AC | 1 1/2 hp @ 120 V AC 3 hp @ 240 V AC 3 hp @ 277 V AC | 1.4" | 2" | 2.5" | 0000000 | 000000 |
| 10 | 24V DC | 83 | 25 A @ 240 V AC/24 V DC | 8 A @ 240 V AC/24 V DC | 250V AC | 1 1/2 hp @ 120 V AC 3 hp @ 240 V AC 3 hp @ 277 V AC | 1.4" | 2" | 2.5" | 0000000 | 00000 |
Machine-Guard Relays
The interlocked opposing contacts won't close at the same time, so these relays are suitable for safety applications such as machine guarding. The screw terminals are recessed to prevent accidental contact with live connections. Mount them on 35 mm DIN rail (also known as DIN 3 rail) or flat surfaces. These relays are built to IEC dimensional standards.
Auxiliary contact (sold separately) allows you to add a signaling device or control another relay.
| Number of Terminals | Input Voltage | Control Current, mA | Switching Current @ 600V AC | Max. Switching Voltage | Ht. | Wd. | Dp. | Each | |
4 Circuits Controlled with 2 Off (Normally Open) and 2 On (Normally Closed)—4PST-2NO/2NC | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 10 | 24V AC | 125 | 10A | 600V AC | 2.3" | 1.7" | 2.2" | 00000000 | 000000 |
| 10 | 120V AC | 25 | 10A | 600V AC | 2.3" | 1.7" | 2.2" | 00000000 | 00000 |
| 10 | 240V AC | 12.5 | 10A | 600V AC | 2.3" | 1.7" | 2.2" | 00000000 | 00000 |
| Number of Circuits Controlled | Switch Starting Position | Industry Designation | Mounting Location | For Relay Width | Each | |
| 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | DPST-1NO/1NC | Front | 1.7" | 00000000 | 000000 |