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.

  • 172472 Baco Controls 80A 3P + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172472

    80A 3P + NC/NO Disc Sw, Encl, Yel/Red Pad

    $193.41
    $348.38
  • 172473 Baco Controls 80A 4 Pole + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172473

    80A 4 Pole + NC/NO Disc Sw, Encl, Yel/Red Pad

    $213.55
    $384.66
  • 172475 Baco Controls 80A Additional Pole
    Baco Controls

    172475

    80A Additional Pole

    $22.98
    $41.39
  • 172476 Baco Controls 80A 4 Pole + NC/NO Disc Sw, Encl, Yel/Red Non-Pad
    Baco Controls

    172476

    80A 4 Pole + NC/NO Disc Sw, Encl, Yel/Red Non-Pad

    $216.39
    $389.77
  • 172481 Baco Controls 80A 4P (N) Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172481

    80A 4P (N) Disc Sw, Encl, Yel/Red Pad

    $219.78
    $395.87
  • 172482 Baco Controls 80A 4P (N) Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172482

    80A 4P (N) Disc Sw, Encl, Yel/Red Pad

    $222.63
    $401.01
  • 172491 Baco Controls 80A 4P (N) + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172491

    80A 4P (N) + NC/NO Disc Sw, Encl, Yel/Red Pad

    $228.75
    $412.03
  • 172492 Baco Controls 80A 4P (N) + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172492

    80A 4P (N) + NC/NO Disc Sw, Encl, Yel/Red Pad

    $231.60
    $417.17
  • 172501 Baco Controls 100A 3P Disc Sw, Panel Mnt, Yel/Red Pad
    Baco Controls

    172501

    100A 3P Disc Sw, Panel Mnt, Yel/Red Pad

    $102.26
    $184.20
  • 172502 Baco Controls 100A 3P Disc Sw, Panel Mnt, Yel/Red Non-Pad
    Baco Controls

    172502

    100A 3P Disc Sw, Panel Mnt, Yel/Red Non-Pad

    $105.12
    $189.34
  • 172509 Baco Controls 100A 6P Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172509

    100A 6P Disc Sw, Encl, Yel/Red Pad

    $300.29
    $540.88
  • 172511 Baco Controls 100A 3P + NC/NO Disc Sw, Panel Mnt, Yel/Red Pad
    Baco Controls

    172511

    100A 3P + NC/NO Disc Sw, Panel Mnt, Yel/Red Pad

    $111.24
    $200.37
  • 172512 Baco Controls 100A 3P + NC/NO Disc Sw, Panel Mnt, Yel/Red Non-Pad
    Baco Controls

    172512

    100A 3P + NC/NO Disc Sw, Panel Mnt, Yel/Red Non-Pad

    $114.08
    $205.48
  • 172519 Baco Controls 100A 6P Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172519

    100A 6P Disc Sw, Encl, Yel/Red Pad

    $303.11
    $545.97
  • 172521 Baco Controls 100A 4P (N) Disc Sw, Panel Mnt, Yel/Red Pad
    Baco Controls

    172521

    100A 4P (N) Disc Sw, Panel Mnt, Yel/Red Pad

    $125.83
    $226.64
  • 172522 Baco Controls 100A 4P (N) Disc Sw, Panel Mnt, Yel/Red Non-Pad
    Baco Controls

    172522

    100A 4P (N) Disc Sw, Panel Mnt, Yel/Red Non-Pad

    $128.67
    $231.77
  • 172529 Baco Controls 100A 6P + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172529

    100A 6P + NC/NO Disc Sw, Encl, Yel/Red Pad

    $309.25
    $557.05
  • 172531 Baco Controls 100A 4P (N) + NC/NO Disc Sw, Panel Mnt, Yel/Red Pad
    Baco Controls

    172531

    100A 4P (N) + NC/NO Disc Sw, Panel Mnt, Yel/Red Pad

    $134.79
    $242.79
  • 172532 Baco Controls 100A 4P (N) + NC/NO Disc Sw, Panel Mnt, Yel/Red Non-Pad
    Baco Controls

    172532

    100A 4P (N) + NC/NO Disc Sw, Panel Mnt, Yel/Red Non-Pad

    $137.65
    $247.92
  • 172539 Baco Controls 100A 6P + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172539

    100A 6P + NC/NO Disc Sw, Encl, Yel/Red Pad

    $312.11
    $562.18
  • 172541 Baco Controls 100A 4 Pole Disc Sw, Panel Mnt, Yel/Red Pad
    Baco Controls

    172541

    100A 4 Pole Disc Sw, Panel Mnt, Yel/Red Pad

    $127.70
    $230.01
  • 172542 Baco Controls 100A 4 Pole Disc Sw, Panel Mnt, Yel/Red Non-Pad
    Baco Controls

    172542

    100A 4 Pole Disc Sw, Panel Mnt, Yel/Red Non-Pad

    $130.55
    $235.15
  • 172549 Baco Controls Empty Enclosure 25/32A up to 4P + Aux
    Baco Controls

    172549

    Empty Enclosure 25/32A up to 4P + Aux

    $18.60
    $33.51
  • 172551 Baco Controls 100A 4 Pole + NC/NO Disc Sw, Panel Mnt, Yel/Red Pad
    Baco Controls

    172551

    100A 4 Pole + NC/NO Disc Sw, Panel Mnt, Yel/Red Pad

    $136.70
    $246.22
  • 172552 Baco Controls 100A 4 Pole + NC/NO Disc Sw, Panel Mnt, Yel/Red Non-Pad
    Baco Controls

    172552

    100A 4 Pole + NC/NO Disc Sw, Panel Mnt, Yel/Red Non-Pad

    $139.54
    $251.35
  • 172559 Baco Controls Empty Enclosure 25/32A up to 6P + Aux
    Baco Controls

    172559

    Empty Enclosure 25/32A up to 6P + Aux

    $34.34
    $61.86
  • 172561 Baco Controls 100A 3P Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172561

    100A 3P Disc Sw, Encl, Yel/Red Pad

    $208.75
    $376.01
  • 172562 Baco Controls 100A 3P Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172562

    100A 3P Disc Sw, Encl, Yel/Red Pad

    $211.59
    $381.14

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.