Fusible and Non-Fusible Disconnect Switches

What Is a Disconnect Switch

A disconnect switch is a manually operated device that completely isolates electrical equipment from its power source, letting you de-energize a circuit safely for maintenance, inspection, repair, or emergency shutdown. It creates a visible, verifiable break in the circuit. Unlike electronic switching, the physical separation of contacts confirms that no current can reach downstream equipment. The National Electrical Code requires disconnect switches for motor-driven equipment, and they must be installed within sight of the equipment they isolate.

Wistex supplies disconnect switches built to meet OSHA lock-out/tag-out requirements while providing safe, reliable isolation for industrial equipment. Choose from fusible, non-fusible, and motor disconnect options up to 2000 A, all available in NEMA 4X and NEMA 12 enclosures for harsh or dusty environments. With rapid shipping and expert guidance, Wistex ensures you get the right switch for the job. Need overcurrent protection? Pair your switch with one of our circuit breakers.

  • 174351 Baco Controls 63A 4 Pole + NC/NO Disc Sw, Panel Mnt, Grey Pad
    Baco Controls

    174351

    63A 4 Pole + NC/NO Disc Sw, Panel Mnt, Grey Pad

    $87.87
    $158.29
  • 174352 Baco Controls 63A 4 Pole + NC/NO Disc Sw, Panel Mnt, Grey Non-Pad
    Baco Controls

    174352

    63A 4 Pole + NC/NO Disc Sw, Panel Mnt, Grey Non-Pad

    $90.84
    $163.64
  • 174355 Baco Controls 63A 4 Pole + NC/NO Disc Sw, Din-Rail Mnt, Grey Pad
    Baco Controls

    174355

    63A 4 Pole + NC/NO Disc Sw, Din-Rail Mnt, Grey Pad

    $87.87
    $158.29
  • 174361 Baco Controls 63A 3P Disc Sw, Encl, Grey Pad
    Baco Controls

    174361

    63A 3P Disc Sw, Encl, Grey Pad

    $103.05
    $185.61
  • 174362 Baco Controls 63A 3P Disc Sw, Encl, Grey Pad
    Baco Controls

    174362

    63A 3P Disc Sw, Encl, Grey Pad

    $106.00
    $190.93
  • 174363 Baco Controls 63A 4 Pole Disc Sw, Encl, Grey Pad
    Baco Controls

    174363

    63A 4 Pole Disc Sw, Encl, Grey Pad

    $122.78
    $221.16
  • 174366 Baco Controls 63A 4 Pole Disc Sw, Encl, Grey Non-Pad
    Baco Controls

    174366

    63A 4 Pole Disc Sw, Encl, Grey Non-Pad

    $125.73
    $226.47
  • 174371 Baco Controls 63A 3P + NC/NO Disc Sw, Encl, Grey Pad
    Baco Controls

    174371

    63A 3P + NC/NO Disc Sw, Encl, Grey Pad

    $112.02
    $201.78
  • 174372 Baco Controls 63A 3P + NC/NO Disc Sw, Encl, Grey Pad
    Baco Controls

    174372

    63A 3P + NC/NO Disc Sw, Encl, Grey Pad

    $114.98
    $207.11
  • 174373 Baco Controls 63A 4 Pole + NC/NO Disc Sw, Encl, Grey Pad
    Baco Controls

    174373

    63A 4 Pole + NC/NO Disc Sw, Encl, Grey Pad

    $131.77
    $237.35
  • 174376 Baco Controls 63A 4 Pole + NC/NO Disc Sw, Encl, Grey Non-Pad
    Baco Controls

    174376

    63A 4 Pole + NC/NO Disc Sw, Encl, Grey Non-Pad

    $134.72
    $242.66
  • 174381 Baco Controls 63A 4P (N) Disc Sw, Encl, Grey Pad
    Baco Controls

    174381

    63A 4P (N) Disc Sw, Encl, Grey Pad

    $122.77
    $221.13
  • 174382 Baco Controls 63A 4P (N) Disc Sw, Encl, Grey Pad
    Baco Controls

    174382

    63A 4P (N) Disc Sw, Encl, Grey Pad

    $125.73
    $226.47
  • 174391 Baco Controls 63A 4P (N) + NC/NO Disc Sw, Encl, Grey Pad
    Baco Controls

    174391

    63A 4P (N) + NC/NO Disc Sw, Encl, Grey Pad

    $131.75
    $237.30
  • 174392 Baco Controls 63A 4P (N) + NC/NO Disc Sw, Encl, Grey Pad
    Baco Controls

    174392

    63A 4P (N) + NC/NO Disc Sw, Encl, Grey Pad

    $134.72
    $242.66
  • 174401 Baco Controls 80A 3P Disc Sw, Panel Mnt, Grey Pad
    Baco Controls

    174401

    80A 3P Disc Sw, Panel Mnt, Grey Pad

    $75.09
    $135.26
  • 174402 Baco Controls 80A 3P Disc Sw, Panel Mnt, Grey Non-Pad
    Baco Controls

    174402

    80A 3P Disc Sw, Panel Mnt, Grey Non-Pad

    $77.95
    $140.40
  • 174405 Baco Controls 80A 3P Disc Sw, Din-Rail Mnt, Grey Pad
    Baco Controls

    174405

    80A 3P Disc Sw, Din-Rail Mnt, Grey Pad

    $75.09
    $135.26
  • 174409 Baco Controls 80A 6P Disc Sw, Encl, Grey Pad
    Baco Controls

    174409

    80A 6P Disc Sw, Encl, Grey Pad

    $265.73
    $478.64
  • 174411 Baco Controls 80A 3P + NC/NO Disc Sw, Panel Mnt, Grey Pad
    Baco Controls

    174411

    80A 3P + NC/NO Disc Sw, Panel Mnt, Grey Pad

    $83.16
    $149.79
  • 174412 Baco Controls 80A 3P + NC/NO Disc Sw, Panel Mnt, Grey Non-Pad
    Baco Controls

    174412

    80A 3P + NC/NO Disc Sw, Panel Mnt, Grey Non-Pad

    $86.93
    $156.57
  • 174415 Baco Controls 80A 3P + NC/NO Disc Sw, Din-Rail Mnt, Grey Pad
    Baco Controls

    174415

    80A 3P + NC/NO Disc Sw, Din-Rail Mnt, Grey Pad

    $83.16
    $149.79
  • 174419 Baco Controls 80A 6P Disc Sw, Encl, Grey Pad
    Baco Controls

    174419

    80A 6P Disc Sw, Encl, Grey Pad

    $268.58
    $483.78
  • 174421 Baco Controls 80A 4P (N) Disc Sw, Panel Mnt, Grey Pad
    Baco Controls

    174421

    80A 4P (N) Disc Sw, Panel Mnt, Grey Pad

    $96.18
    $173.25
  • 174422 Baco Controls 80A 4P (N) Disc Sw, Panel Mnt, Grey Non-Pad
    Baco Controls

    174422

    80A 4P (N) Disc Sw, Panel Mnt, Grey Non-Pad

    $99.03
    $178.38
  • 174425 Baco Controls 80A 4P (N) Disc Sw, Din-Rail Mnt, Grey Pad
    Baco Controls

    174425

    80A 4P (N) Disc Sw, Din-Rail Mnt, Grey Pad

    $96.18
    $173.25
  • 174429 Baco Controls 80A 6P + NC/NO Disc Sw, Encl, Grey Pad
    Baco Controls

    174429

    80A 6P + NC/NO Disc Sw, Encl, Grey Pad

    $274.72
    $494.82
  • 174431 Baco Controls 80A 4P (N) + NC/NO Disc Sw, Panel Mnt, Grey Pad
    Baco Controls

    174431

    80A 4P (N) + NC/NO Disc Sw, Panel Mnt, Grey Pad

    $105.18
    $189.45

Fusible vs Non-Fusible Disconnect Switches

Fusible disconnect switches combine circuit isolation with overcurrent protection in a single device. Fuses are built into the switch mechanism, so the switch both isolates the circuit for maintenance and clears short circuits and overloads automatically. Non-fusible disconnect switches provide isolation only and rely on upstream devices, such as circuit breakers or motor starters, for overcurrent protection. A fusible switch is typically specified where short-circuit protection is needed at the point of service, such as at a service entrance or in high fault-current applications. Non-fusible switches are the more economical choice where overcurrent protection is already handled upstream, and are commonly used for motor leads. Wistex fusible switches accept Class J, R, and H fuses.

Disconnect Switches We Offer

Our selection includes trusted brands and enclosure styles to suit virtually any industrial application.

Fusible Safety Switches

Fusible Safety Switches

Fusible disconnects provide short-circuit protection and meet NEC service entrance requirements. Ideal for high SCCR applications, these NF-rated switches accept a variety of fuse classes, including J, R, and H.

Non-Fusible Disconnects

Compact and economical, non-fusible disconnect switches offer a reliable means to manually isolate equipment for maintenance. These are commonly used for motor loads when protection is handled upstream.

Non-Fusible Disconnects
Enclosed Motor Disconnects

Enclosed Motor Disconnects

These all-in-one motor disconnects combine a switch and enclosure, making them ideal for local servicing points on rooftop units, pump panels, or machinery.

Lock-Out/Tag-Out Compliance

Disconnect switches support lock-out/tag-out procedures through padlockable handles that can be secured in the OFF position, preventing accidental re-energisation while maintenance is underway. Clear ON and OFF position indication allows anyone approaching the equipment to confirm its state without opening the enclosure.

Applications for Disconnect Switches

Wistex disconnects are field-proven across a wide range of industrial and commercial systems.

  • HVAC units
  • Machine tools
  • Pump panels
  • Rooftop equipment

Complete your motor control system with contactors and soft starters.

Why Choose Wistex for Safety Disconnects

Wistex is trusted for code-compliant solutions that meet real-world demands. We stock a wide range of fusible and non-fusible disconnect switches, with amperages from 30 A to 2000 A, and enclosure options built for your environment. Our experts can help you build out complete solutions with fuse kits, mounting hardware, and made-in-USA selections, all ready to ship fast.

Disconnect Switch FAQs

Need help choosing or sizing a disconnect switch? Start with these commonly asked questions.

A fusible disconnect switch is typically required when short-circuit protection is needed at the point of service, such as service entrances or fault-current applications. Many local codes also specify fusing for added safety.

To size a switch, multiply your motor's Full Load Amps (FLA) by 115%, consider voltage and phase, and select the correct fuse class. Browse our 30A disconnect switch options or filter by amperage to find your match.

A disconnect switch provides a safe means to isolate power, but unlike a circuit breaker, it does not offer overcurrent protection. Disconnects are ideal for lock-out/tag-out compliance and scheduled maintenance.