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.

  • 172292 Baco Controls 50A 4P (N) + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172292

    50A 4P (N) + NC/NO Disc Sw, Encl, Yel/Red Pad

    $118.05
    $212.62
  • 172302 Baco Controls 63A 3P Disc Sw, Panel Mnt, Yel/Red Non-Pad
    Baco Controls

    172302

    63A 3P Disc Sw, Panel Mnt, Yel/Red Non-Pad

    $62.10
    $111.87
  • 172309 Baco Controls 63A 6P Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172309

    63A 6P Disc Sw, Encl, Yel/Red Pad

    $163.39
    $294.32
  • 172311 Baco Controls 63A 3P + NC/NO Disc Sw, Panel Mnt, Yel/Red Pad
    Baco Controls

    172311

    63A 3P + NC/NO Disc Sw, Panel Mnt, Yel/Red Pad

    $68.14
    $122.73
  • 172312 Baco Controls 63A 3P + NC/NO Disc Sw, Panel Mnt, Yel/Red Non-Pad
    Baco Controls

    172312

    63A 3P + NC/NO Disc Sw, Panel Mnt, Yel/Red Non-Pad

    $71.12
    $128.09
  • 172319 Baco Controls 63A 6P Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172319

    63A 6P Disc Sw, Encl, Yel/Red Pad

    $166.37
    $299.67
  • 172321 Baco Controls 63A 4P (N) Disc Sw, Panel Mnt, Yel/Red Pad
    Baco Controls

    172321

    63A 4P (N) Disc Sw, Panel Mnt, Yel/Red Pad

    $77.03
    $138.75
  • 172322 Baco Controls 63A 4P (N) Disc Sw, Panel Mnt, Yel/Red Non-Pad
    Baco Controls

    172322

    63A 4P (N) Disc Sw, Panel Mnt, Yel/Red Non-Pad

    $80.01
    $144.11
  • 172329 Baco Controls 63A 6P + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172329

    63A 6P + NC/NO Disc Sw, Encl, Yel/Red Pad

    $172.39
    $310.52
  • 172331 Baco Controls 63A 4P (N) + NC/NO Disc Sw, Panel Mnt, Yel/Red Pad
    Baco Controls

    172331

    63A 4P (N) + NC/NO Disc Sw, Panel Mnt, Yel/Red Pad

    $86.00
    $154.90
  • 172332 Baco Controls 63A 4P (N) + NC/NO Disc Sw, Panel Mnt, Yel/Red Non-Pad
    Baco Controls

    172332

    63A 4P (N) + NC/NO Disc Sw, Panel Mnt, Yel/Red Non-Pad

    $88.97
    $160.25
  • 172339 Baco Controls 63A 6P + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172339

    63A 6P + NC/NO Disc Sw, Encl, Yel/Red Pad

    $175.35
    $315.83
  • 172341 Baco Controls 63A 4 Pole Disc Sw, Panel Mnt, Yel/Red Pad
    Baco Controls

    172341

    63A 4 Pole Disc Sw, Panel Mnt, Yel/Red Pad

    $78.88
    $142.08
  • 172342 Baco Controls 63A 4 Pole Disc Sw, Panel Mnt, Yel/Red Non-Pad
    Baco Controls

    172342

    63A 4 Pole Disc Sw, Panel Mnt, Yel/Red Non-Pad

    $81.85
    $147.43
  • 172351 Baco Controls 63A 4 Pole + NC/NO Disc Sw, Panel Mnt, Yel/Red Pad
    Baco Controls

    172351

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

    $87.87
    $158.29
  • 172352 Baco Controls 63A 4 Pole + NC/NO Disc Sw, Panel Mnt, Yel/Red Non-Pad
    Baco Controls

    172352

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

    $90.84
    $163.64
  • 172361 Baco Controls 63A 3P Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172361

    63A 3P Disc Sw, Encl, Yel/Red Pad

    $103.05
    $185.61
  • 172362 Baco Controls 63A 3P Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172362

    63A 3P Disc Sw, Encl, Yel/Red Pad

    $106.00
    $190.93
  • 172363 Baco Controls 63A 4 Pole Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172363

    63A 4 Pole Disc Sw, Encl, Yel/Red Pad

    $122.78
    $221.16
  • 172365 Baco Controls 63A Neutral Pole
    Baco Controls

    172365

    63A Neutral Pole

    $17.85
    $32.15
  • 172366 Baco Controls 63A 4 Pole Disc Sw, Encl, Yel/Red Non-Pad
    Baco Controls

    172366

    63A 4 Pole Disc Sw, Encl, Yel/Red Non-Pad

    $125.73
    $226.47
  • 172367 Baco Controls 50/63A 3P Terminal Cover
    Baco Controls

    172367

    50/63A 3P Terminal Cover

    $2.83
    $5.10
  • 172371 Baco Controls 63A 3P + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172371

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

    $112.02
    $201.78
  • 172372 Baco Controls 63A 3P + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172372

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

    $114.98
    $207.11
  • 172373 Baco Controls 63A 4 Pole + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172373

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

    $131.77
    $237.35
  • 172375 Baco Controls 63A Additional Pole
    Baco Controls

    172375

    63A Additional Pole

    $19.74
    $35.55
  • 172376 Baco Controls 63A 4 Pole + NC/NO Disc Sw, Encl, Yel/Red Non-Pad
    Baco Controls

    172376

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

    $134.72
    $242.66
  • 172377 Baco Controls 50/63A 3P Terminal Cover
    Baco Controls

    172377

    50/63A 3P Terminal Cover

    $2.29
    $4.14

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.