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.

  • 174592 Baco Controls 100A 4P (N) + NC/NO Disc Sw, Encl, Grey Pad
    Baco Controls

    174592

    100A 4P (N) + NC/NO Disc Sw, Encl, Grey Pad

    $261.20
    $470.49
  • 174601 Baco Controls Grey 66mm Pad Handle
    Baco Controls

    174601

    Grey 66mm Pad Handle

    $7.85
    $14.16
  • 174602 Baco Controls Grey 64mm Non-Pad Handle/Legend
    Baco Controls

    174602

    Grey 64mm Non-Pad Handle/Legend

    $12.77
    $23.00
  • 174612 Baco Controls Grey 72mm Non-Pad Handle/Legend
    Baco Controls

    174612

    Grey 72mm Non-Pad Handle/Legend

    $14.72
    $26.52
  • 174621 Baco Controls Grey 86mm Pad Handle
    Baco Controls

    174621

    Grey 86mm Pad Handle

    $11.77
    $21.21
  • 174622 Baco Controls Grey 96mm Non-Pad Handle/Legend
    Baco Controls

    174622

    Grey 96mm Non-Pad Handle/Legend

    $16.68
    $30.05
  • 200127 | Eaton T6-160-6/V/SVB-SW/HI11 CAM SWITCH
    Eaton

    200127

    T6-160-6/V/SVB-SW/HI11 CAM SWITCH

    $2,359.75
    $4,604.41
  • 207426 | Eaton T5B-4-15682/EA/SVB-SW CAM SWITCH WITH BLACK LOCK HDL
    Eaton

    207426

    T5B-4-15682/EA/SVB-SW CAM SWITCH WITH BLACK LOCK HDL

    $868.90
    $1,695.41
  • 212321 | Eaton T0-2-4929US/I1/SVB-SW/L-SOND803 CAM SWITCH IN ENCLOSURE WI
    Eaton

    212321

    T0-2-4929US/I1/SVB-SW/L-SOND803 CAM SWITCH IN ENCLOSURE WI

    $382.13
    $745.59
  • 212322 | Eaton T0-2-4929US/I1/SVB-SW/L-SOND804 CAM SWITCH IN ENCLOSURE WI
    Eaton

    212322

    T0-2-4929US/I1/SVB-SW/L-SOND804 CAM SWITCH IN ENCLOSURE WI

    $425.81
    $830.85
  • 212367 | Eaton T0-2-113/I1/SVB-SW/L-SOND804 ROTARY SW 20A WITH INDICATING
    Eaton

    212367

    T0-2-113/I1/SVB-SW/L-SOND804 ROTARY SW 20A WITH INDICATING

    $425.81
    $830.85
  • 222277 Baco Controls Defeatable Handle Door Interlock Kit Yellow/Red
    Baco Controls

    222277

    Defeatable Handle Door Interlock Kit Yellow/Red

    $62.41
    $112.43
  • 222278 Baco Controls Defeatable Handle Door Interlock Kit Grey
    Baco Controls

    222278

    Defeatable Handle Door Interlock Kit Grey

    $62.41
    $112.43
  • 255895 | Eaton P1-32/I2/SVB-SW/HI11-NA MAIN SW I2/SVB
    Eaton

    255895

    P1-32/I2/SVB-SW/HI11-NA MAIN SW I2/SVB

    $424.19
    $827.68
  • 255907 | Eaton P3-100/I5/SVB/HI11-NA MAIN SW I5/SVB
    Eaton

    255907

    P3-100/I5/SVB/HI11-NA MAIN SW I5/SVB

    $1,125.49
    $2,196.07
  • 60232 | Eaton P1-32/EA/SVB-SW/N/HI11. 30AMP UL DISC, FLUSH MOUNT W/?
    Eaton

    60232

    P1-32/EA/SVB-SW/N/HI11. 30AMP UL DISC, FLUSH MOUNT W/?

    $411.09
    $802.11
  • 69724 | Eaton P3-63/EA/SVB-SW/N/HI11 CIRCUIT INTERRUPTER P3-63 (UK)
    Eaton

    69724

    P3-63/EA/SVB-SW/N/HI11 CIRCUIT INTERRUPTER P3-63 (UK)

    $625.84
    $1,221.15
  • 92229 | Eaton T5B-4-15164/EA/SVB-SW CAM SWITCH
    Eaton

    92229

    T5B-4-15164/EA/SVB-SW CAM SWITCH

    $899.99
    $1,756.07
  • AC1NCR9 | Eaton Rotary Disconnect
    Eaton

    AC1NCR9

    Rotary Disconnect

    $38.50
    $109.52
  • AC1NO1NCJ2N | Eaton Rotary Disconnects
    Eaton

    AC1NO1NCJ2N

    Rotary Disconnects

    $96.24
    $273.79
  • AC1NO1NCJ2NT | Eaton Rotary Disconnects
    Eaton

    AC1NO1NCJ2NT

    Rotary Disconnects

    $156.84
    $446.18
  • AC1NONC | Eaton Rotary Disconnects
    Eaton

    AC1NONC

    Rotary Disconnects

    $48.48
    $137.92
  • AC1NONCDE | Eaton Rotary Disconnects
    Eaton

    AC1NONCDE

    Rotary Disconnects

    $96.24
    $273.79
  • AC1NOR9 | Eaton Rotary Disconnect
    Eaton

    AC1NOR9

    Rotary Disconnect

    $38.50
    $109.52
  • AC2NO2NCJ2N | Eaton Rotary Disconnects
    Eaton

    AC2NO2NCJ2N

    Rotary Disconnects

    $186.78
    $531.35
  • AC2NO2NCJ2NT | Eaton Rotary Disconnects
    Eaton

    AC2NO2NCJ2NT

    Rotary Disconnects

    $310.10
    $882.22
  • AC2NONCDE | Eaton Rotary Disconnects
    Eaton

    AC2NONCDE

    Rotary Disconnects

    $168.24
    $478.61
  • AC2NONCDELL | Eaton Rotary Disconnects
    Eaton

    AC2NONCDELL

    Rotary Disconnects

    $219.56
    $624.64

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.