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.

  • 172141 Baco Controls 32A 4 Pole Disc Sw, Panel Mnt, Yel/Red Pad
    Baco Controls

    172141

    32A 4 Pole Disc Sw, Panel Mnt, Yel/Red Pad

    $52.74
    $94.99
  • 172142 Baco Controls 32A 4 Pole Disc Sw, Panel Mnt, Yel/Red Non-Pad
    Baco Controls

    172142

    32A 4 Pole Disc Sw, Panel Mnt, Yel/Red Non-Pad

    $55.10
    $99.25
  • 172143 Baco Controls 32A 4 Pole Disc Sw, Panel Mnt, Yel/Red Pad 22mm
    Baco Controls

    172143

    32A 4 Pole Disc Sw, Panel Mnt, Yel/Red Pad 22mm

    $54.57
    $98.30
  • 172144 Baco Controls 32A 4 Pole Disc Sw, Panel Mnt, Yel/Red Non-Pad 22mm
    Baco Controls

    172144

    32A 4 Pole Disc Sw, Panel Mnt, Yel/Red Non-Pad 22mm

    $55.33
    $99.67
  • 172151 Baco Controls 32A 4 Pole + NC/NO Disc Sw, Panel Mnt, Yel/Red Pad
    Baco Controls

    172151

    32A 4 Pole + NC/NO Disc Sw, Panel Mnt, Yel/Red Pad

    $61.72
    $111.17
  • 172152 Baco Controls 32A 4 Pole + NC/NO Disc Sw, Panel Mnt, Yel/Red Non-Pad
    Baco Controls

    172152

    32A 4 Pole + NC/NO Disc Sw, Panel Mnt, Yel/Red Non-Pad

    $64.08
    $115.44
  • 172153 Baco Controls 32A 4 Pole + NC/NO Disc Sw, Panel Mnt, Yel/Red Pad 22mm
    Baco Controls

    172153

    32A 4 Pole + NC/NO Disc Sw, Panel Mnt, Yel/Red Pad 22mm

    $63.55
    $114.48
  • 172154 Baco Controls 32A 4 Pole + NC/NO Disc Sw, Panel Mnt, Yel/Red Non-Pad 22mm
    Baco Controls

    172154

    32A 4 Pole + NC/NO Disc Sw, Panel Mnt, Yel/Red Non-Pad 22mm

    $64.32
    $115.86
  • 172161 Baco Controls 32A 3P Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172161

    32A 3P Disc Sw, Encl, Yel/Red Pad

    $56.06
    $100.96
  • 172162 Baco Controls 32A 3P Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172162

    32A 3P Disc Sw, Encl, Yel/Red Pad

    $58.44
    $105.25
  • 172163 Baco Controls 32A 4 Pole Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172163

    32A 4 Pole Disc Sw, Encl, Yel/Red Pad

    $71.34
    $128.50
  • 172166 Baco Controls 32A 4 Pole Disc Sw, Encl, Yel/Red Non-Pad
    Baco Controls

    172166

    32A 4 Pole Disc Sw, Encl, Yel/Red Non-Pad

    $73.71
    $132.77
  • 172167 Baco Controls 25/32A 3P Terminal Cover
    Baco Controls

    172167

    25/32A 3P Terminal Cover

    $1.61
    $2.89
  • 172171 Baco Controls 32A 3P + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172171

    32A 3P + NC/NO Disc Sw, Encl, Yel/Red Pad

    $65.03
    $117.13
  • 172172 Baco Controls 32A 3P + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172172

    32A 3P + NC/NO Disc Sw, Encl, Yel/Red Pad

    $67.41
    $121.42
  • 172173 Baco Controls 32A 4 Pole + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172173

    32A 4 Pole + NC/NO Disc Sw, Encl, Yel/Red Pad

    $80.33
    $144.69
  • 172175 Baco Controls 32A Additional Pole
    Baco Controls

    172175

    32A Additional Pole

    $15.30
    $27.54
  • 172176 Baco Controls 32A 4 Pole + NC/NO Disc Sw, Encl, Yel/Red Non-Pad
    Baco Controls

    172176

    32A 4 Pole + NC/NO Disc Sw, Encl, Yel/Red Non-Pad

    $82.70
    $148.96
  • 172177 Baco Controls 25/32A 1P Terminal Cover
    Baco Controls

    172177

    25/32A 1P Terminal Cover

    $1.07
    $1.94
  • 172181 Baco Controls 32A 4P (N) Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172181

    32A 4P (N) Disc Sw, Encl, Yel/Red Pad

    $71.34
    $128.51
  • 172182 Baco Controls 32A 4P (N) Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172182

    32A 4P (N) Disc Sw, Encl, Yel/Red Pad

    $73.71
    $132.77
  • 172189 Baco Controls NC/NO Aux Block Terminal Cover
    Baco Controls

    172189

    NC/NO Aux Block Terminal Cover

    $1.66
    $2.99
  • 172191 Baco Controls 32A 4P (N) + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172191

    32A 4P (N) + NC/NO Disc Sw, Encl, Yel/Red Pad

    $80.32
    $144.66
  • 172192 Baco Controls 32A 4P (N) + NC/NO Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172192

    32A 4P (N) + NC/NO Disc Sw, Encl, Yel/Red Pad

    $82.67
    $148.93
  • 172199 Baco Controls Early Break Aux Block Terminal Cover
    Baco Controls

    172199

    Early Break Aux Block Terminal Cover

    $2.66
    $4.79
  • 172201 Baco Controls 50A 3P Disc Sw, Panel Mnt, Yel/Red Pad
    Baco Controls

    172201

    50A 3P Disc Sw, Panel Mnt, Yel/Red Pad

    $45.43
    $81.83
  • 172202 Baco Controls 50A 3P Disc Sw, Panel Mnt, Yel/Red Non-Pad
    Baco Controls

    172202

    50A 3P Disc Sw, Panel Mnt, Yel/Red Non-Pad

    $48.39
    $87.15
  • 172209 Baco Controls 50A 6P Disc Sw, Encl, Yel/Red Pad
    Baco Controls

    172209

    50A 6P Disc Sw, Encl, Yel/Red Pad

    $140.87
    $253.75

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.