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.

  • 174005 Baco Controls 25A 3P Disc Sw, Din-Rail Mnt, Grey Pad
    Baco Controls

    174005

    25A 3P Disc Sw, Din-Rail Mnt, Grey Pad

    $34.06
    $61.35
  • 174009 Baco Controls 25A 6P Disc Sw, Encl, Grey Pad
    Baco Controls

    174009

    25A 6P Disc Sw, Encl, Grey Pad

    $113.00
    $203.53
  • 174011 Baco Controls 25A 3P + NC/NO Disc Sw, Panel Mnt, Grey Pad
    Baco Controls

    174011

    25A 3P + NC/NO Disc Sw, Panel Mnt, Grey Pad

    $43.04
    $77.52
  • 174012 Baco Controls 25A 3P + NC/NO Disc Sw, Panel Mnt, Grey Non-Pad
    Baco Controls

    174012

    25A 3P + NC/NO Disc Sw, Panel Mnt, Grey Non-Pad

    $45.41
    $81.78
  • 174013 Baco Controls 25A 3P + NC/NO Disc Sw, Panel Mnt, Grey Pad 22mm
    Baco Controls

    174013

    25A 3P + NC/NO Disc Sw, Panel Mnt, Grey Pad 22mm

    $44.87
    $80.83
  • 174014 Baco Controls 25A 3P + NC/NO Disc Sw, Panel Mnt, Grey Non-Pad 22mm
    Baco Controls

    174014

    25A 3P + NC/NO Disc Sw, Panel Mnt, Grey Non-Pad 22mm

    $45.64
    $82.23
  • 174015 Baco Controls 25A 3P + NC/NO Disc Sw, Din-Rail Mnt, Grey Pad
    Baco Controls

    174015

    25A 3P + NC/NO Disc Sw, Din-Rail Mnt, Grey Pad

    $43.04
    $77.52
  • 174019 Baco Controls 25A 6P Disc Sw, Encl, Grey Pad
    Baco Controls

    174019

    25A 6P Disc Sw, Encl, Grey Pad

    $125.18
    $225.48
  • 174021 Baco Controls 25A 4P (N) Disc Sw, Panel Mnt, Grey Pad
    Baco Controls

    174021

    25A 4P (N) Disc Sw, Panel Mnt, Grey Pad

    $47.05
    $84.75
  • 174022 Baco Controls 25A 4P (N) Disc Sw, Panel Mnt, Grey Non-Pad
    Baco Controls

    174022

    25A 4P (N) Disc Sw, Panel Mnt, Grey Non-Pad

    $49.42
    $89.02
  • 174023 Baco Controls 25A 4P (N) Disc Sw, Panel Mnt, Grey Pad 22mm
    Baco Controls

    174023

    25A 4P (N) Disc Sw, Panel Mnt, Grey Pad 22mm

    $48.90
    $88.08
  • 174024 Baco Controls 25A 4P (N) Disc Sw, Panel Mnt, Grey Non-Pad 22mm
    Baco Controls

    174024

    25A 4P (N) Disc Sw, Panel Mnt, Grey Non-Pad 22mm

    $49.67
    $89.48
  • 174025 Baco Controls 25A 4P (N) Disc Sw, Din-Rail Mnt, Grey Pad
    Baco Controls

    174025

    25A 4P (N) Disc Sw, Din-Rail Mnt, Grey Pad

    $47.05
    $84.75
  • 174029 Baco Controls 25A 6P + NC/NO Disc Sw, Encl, Grey Pad
    Baco Controls

    174029

    25A 6P + NC/NO Disc Sw, Encl, Grey Pad

    $121.96
    $219.69
  • 174031 Baco Controls 25A 4P (N) + NC/NO Disc Sw, Panel Mnt, Grey Pad
    Baco Controls

    174031

    25A 4P (N) + NC/NO Disc Sw, Panel Mnt, Grey Pad

    $56.03
    $100.91
  • 174032 Baco Controls 25A 4P (N) + NC/NO Disc Sw, Panel Mnt, Grey Non-Pad
    Baco Controls

    174032

    25A 4P (N) + NC/NO Disc Sw, Panel Mnt, Grey Non-Pad

    $58.41
    $105.21
  • 174033 Baco Controls 25A 4P (N) + NC/NO Disc Sw, Panel Mnt, Grey Pad 22mm
    Baco Controls

    174033

    25A 4P (N) + NC/NO Disc Sw, Panel Mnt, Grey Pad 22mm

    $57.88
    $104.25
  • 174034 Baco Controls 25A 4P (N) + NC/NO Disc Sw, Panel Mnt, Grey Non-Pad 22mm
    Baco Controls

    174034

    25A 4P (N) + NC/NO Disc Sw, Panel Mnt, Grey Non-Pad 22mm

    $58.65
    $105.63
  • 174035 Baco Controls 25A 4P (N) + NC/NO Disc Sw, Din-Rail Mnt, Grey Pad
    Baco Controls

    174035

    25A 4P (N) + NC/NO Disc Sw, Din-Rail Mnt, Grey Pad

    $56.03
    $100.91
  • 174039 Baco Controls 25A 6P + NC/NO Disc Sw, Encl, Grey Pad
    Baco Controls

    174039

    25A 6P + NC/NO Disc Sw, Encl, Grey Pad

    $134.18
    $241.69
  • 174041 Baco Controls 25A 4 Pole Disc Sw, Panel Mnt, Grey Pad
    Baco Controls

    174041

    25A 4 Pole Disc Sw, Panel Mnt, Grey Pad

    $48.80
    $87.90
  • 174042 Baco Controls 25A 4 Pole Disc Sw, Panel Mnt, Grey Non-Pad
    Baco Controls

    174042

    25A 4 Pole Disc Sw, Panel Mnt, Grey Non-Pad

    $51.17
    $92.16
  • 174043 Baco Controls 25A 4 Pole Disc Sw, Panel Mnt, Grey Pad 22mm
    Baco Controls

    174043

    25A 4 Pole Disc Sw, Panel Mnt, Grey Pad 22mm

    $50.63
    $91.21
  • 174044 Baco Controls 25A 4 Pole Disc Sw, Panel Mnt, Grey Non-Pad 22mm
    Baco Controls

    174044

    25A 4 Pole Disc Sw, Panel Mnt, Grey Non-Pad 22mm

    $51.39
    $92.58
  • 174045 Baco Controls 25A 4 Pole Disc Sw, Din-Rail Mnt, Grey Pad
    Baco Controls

    174045

    25A 4 Pole Disc Sw, Din-Rail Mnt, Grey Pad

    $48.80
    $87.90
  • 174051 Baco Controls 25A 4 Pole + NC/NO Disc Sw, Panel Mnt, Grey Pad
    Baco Controls

    174051

    25A 4 Pole + NC/NO Disc Sw, Panel Mnt, Grey Pad

    $57.78
    $104.08
  • 174052 Baco Controls 25A 4 Pole + NC/NO Disc Sw, Panel Mnt, Grey Non-Pad
    Baco Controls

    174052

    25A 4 Pole + NC/NO Disc Sw, Panel Mnt, Grey Non-Pad

    $60.16
    $108.35
  • 174053 Baco Controls 25A 4 Pole + NC/NO Disc Sw, Panel Mnt, Grey Pad 22mm
    Baco Controls

    174053

    25A 4 Pole + NC/NO Disc Sw, Panel Mnt, Grey Pad 22mm

    $59.62
    $107.39

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.