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.

  • MSWB 63 B3 H | Weg Rotary Disconnector
    Weg

    MSWB 63 B3 H

    Rotary Disconnector

    $149.26
    $340.00
  • OETL-ZX95 | ABB Shaft Coupler 12Mm
    ABB

    OETL-ZX95

    Shaft Coupler 12Mm

    $93.75
    $139.18
  • OFS690 | ABB 3Ph Fuse Monitor 690Vac Iec
    ABB

    OFS690

    3Ph Fuse Monitor 690Vac Iec

    $264.44
    $525.28
  • OHB125J12E311 | ABB Pistol Handle, I - 0 - Ii
    ABB

    OHB125J12E311

    Pistol Handle, I - 0 - Ii

    $112.74
    $160.20
  • OHBS1 | ABB Hdl Non-Padlock Blk Direct Mount
    ABB

    OHBS1

    Hdl Non-Padlock Blk Direct Mount

    $7.78
    $19.25
  • OHBS1AH | ABB Bk Handle Ot16F-Ot80F Otdc16-32F Ne
    ABB

    OHBS1AH

    Bk Handle Ot16F-Ot80F Otdc16-32F Ne

    $19.01
    $24.13
  • OHBS2 | ABB Hdl Padlock Blk Direct Mount
    ABB

    OHBS2

    Hdl Padlock Blk Direct Mount

    $13.04
    $19.36
  • OHBS2AJEH | ABB Handle
    ABB

    OHBS2AJEH

    Handle

    $188.66
    $427.62
  • OS60GJ02 | ABB 2P Fusible Sw 60 600Vac Ul98
    ABB

    OS60GJ02

    2P Fusible Sw 60 600Vac Ul98

    $395.41
    $571.43
  • OS60GJ03 | ABB 3P Sw 60A J Fuse 600V Ul98
    ABB

    OS60GJ03

    3P Sw 60A J Fuse 600V Ul98

    $340.78
    $505.88
  • OT30FT3 | ABB 3P 30A Ul98 Nf Door Mount Sw
    ABB

    OT30FT3

    3P 30A Ul98 Nf Door Mount Sw

    $146.39
    $217.32
  • OT40F3U | ABB 3P Sw 40A Nf Metal Collar
    ABB

    OT40F3U

    3P Sw 40A Nf Metal Collar

    $89.36
    $132.65
  • OT80F6 | ABB 6P 80A Ul508 Nf Sw
    ABB

    OT80F6

    6P 80A Ul508 Nf Sw

    $285.18
    $431.32
  • OTDC600UFV11 | ABB 600A 2-Pole Pv 1500Vdc Disc Sw
    ABB

    OTDC600UFV11

    600A 2-Pole Pv 1500Vdc Disc Sw

    $1,534.81
    $3,797.27
  • OWP6D40 | ABB 6P Mech Ot 16,25,32F
    ABB

    OWP6D40

    6P Mech Ot 16,25,32F

    $51.86
    $75.82
  • OXS6X330 | ABB Sel Shaft 6X330
    ABB

    OXS6X330

    Sel Shaft 6X330

    $17.29
    $25.66
  • OZXA-38 | ABB Bridging Bars
    ABB

    OZXA-38

    Bridging Bars

    $99.46
    $115.98
  • R4H3030FCC | Eaton Rotary disconnect switch (30A, 600V, 3P)
    Eaton

    R4H3030FCC

    Rotary disconnect switch (30A, 600V, 3P)

    $305.10
    $868.00
  • R9C3030U | Eaton Rotary disconnect switch
    Eaton

    R9C3030U

    Rotary disconnect switch

    $215.99
    $614.47
  • R9L3200FJ | Eaton Rotary Disconnect (200A, 600V, 3P)
    Eaton

    R9L3200FJ

    Rotary Disconnect (200A, 600V, 3P)

    $1,746.48
    $4,968.65
  • SF400PH10X10 | Eaton Rotary disconnect shaft extension
    Eaton

    SF400PH10X10

    Rotary disconnect shaft extension

    $65.23
    $185.56
  • WEG
    Weg

    TSB-22

    Trip Signaling and Alarm Contact Block

  • XTPAXSR240V60H | Eaton 240V/60Hz Shunt Release
    Eaton

    XTPAXSR240V60H

    240V/60Hz Shunt Release

    $52.83
    $213.33
  • XTPAXSR480V60H | Eaton 480V/60Hz Shunt Release
    Eaton

    XTPAXSR480V60H

    480V/60Hz Shunt Release

    $54.18
    $218.75
  • XTPBP40BC1 | Eaton IEC Motor Control (0.25-0.40A)
    Eaton

    XTPBP40BC1

    IEC Motor Control (0.25-0.40A)

    $52.09
    $227.17
  • XTPR016BC1 | Eaton IEC Motor Control (10-16A)
    Eaton

    XTPR016BC1

    IEC Motor Control (10-16A)

    $94.91
    $456.34
  • XTPR025BC1 | Eaton IEC Motor Control (20-25A)
    Eaton

    XTPR025BC1

    IEC Motor Control (20-25A)

    $104.01
    $500.06

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.