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 A and B have a key entry on the top and side of the switch.

Style C has a key entry on two opposite sides of the switch.

Emergency override keys (sold separately) bypass the access delay feature.

For technical drawings and 3-D models, click on a part number.

Choose an actuator and contact block to make your own switch. All switches are IP and NEMA rated for protection from dust, washdown, and chemicals. For an easy way to tell switches apart without labels, choose them based on their actuator color.

Key actuators prevent accidental activation because they require a key to turn on and off. They are keyed alike, so they will all open with the same key.

For technical drawings and 3-D models, click on a part number.

Choose an actuator and contact block to make your own switch. All switches are rated for protection from washdowns and oil/coolant spraying. NEMA 4X rated switches are also protected from corrosion. Use legend plates (not included) to label switches.

Key actuators are keyed alike, so they will all open with the same key.

Switch guards protect flush and projecting switches from accidental activation.

For technical drawings and 3-D models, click on a part number.

Limit access to sensitive equipment—these switches require a key to actuate. They're rated IP66, IP69K, NEMA 3S, NEMA 4X, and NEMA 13, and are UL and C-UL Recognized Components. Switches include enough contact blocks to control the number of circuits listed. Contact blocks are rated IP20 and are UL and C-UL Listed. Use BACO legend plates (not included) to label switches.

Mounting tools (sold separately) make it easier to install switches in crowded panels.

Additional contact blocks (sold separately) can be added to control more circuits, or to replace the included contact block.

To prevent accidental actuation and limit access to sensitive equipment, these switches require a key to turn circuits on or off. The contact block and actuator are all one piece, so they won’t separate in high-vibration applications. Install them in a standard panel cutout. They’re keyed alike, so they will all open with the same key.

For technical drawings and 3-D models, click on a part number.

These switches require a key to turn circuits on or off, limiting access to sensitive equipment. Rated NEMA 6, 13, and IP66, they're protected from washdowns and oil/coolant spraying. All are keyed alike, so they open with the same key. They include enough contact blocks to control the number of circuits listed.

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.

Designed for use near ignitable gases, fibers, and dust, these switches have a housing that seals in anything that could ignite flammable material. You’ll know they’re safe because they’re NEC Class 1, Division 2 Groups A-D and NEC Zone 1 Groups IIC-IIA certified for hazardous locations. These switches require a key to turn circuits on or off, preventing accidental actuation and limiting access to sensitive equipment. Since they’re keyed alike, all open with the same key. Install them in a standard panel cutout.

Switches that control two circuits come with a contact block for each circuit.

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.

Limit access to sensitive equipment—these switches require a key to actuate. Rated NEMA 4, 13, and IP65, they're protected from washdowns and oil/coolant spraying. All are keyed alike, so they open with the same key.

Mounting wrenches (sold separately) make it easier to install switches in crowded panels.

For technical drawings and 3-D models, click on a part number.

Rated NEMA 4 or IP66, these switches are protected from washdowns. They require a key to turn circuits on or off, limiting access to sensitive equipment. All fit into a standard panel cutout.

Keyed alike switches all open with the same key.

For technical drawings and 3-D models, click on a part number.