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.

  • ER53040UX | Eaton Enclosed Rotary Disconnect Switch (40 Amps, 3 Pole, 600VAC)
    Eaton

    ER53040UX

    Enclosed Rotary Disconnect Switch (40 Amps, 3 Pole, 600VAC)

    $1,114.83
    $2,175.26
  • ER53060UPGB | Enclosed Rotary Disconnect Switch (60 Amps, 3 Pole, 600VAC)
    Eaton

    ER53060UPGB

    Enclosed Rotary Disconnect Switch (60 Amps, 3 Pole, 600VAC)

    $546.75
    $1,066.84
  • MRX100-130E Weg Red and Yellow Rotary Handle with 130mm Shaft
    Weg

    MRX100-130E

    Red and Yellow Rotary Handle with 130mm Shaft

    $99.87
    $130.00
  • MSW 40 B-3 H Weg Red and Yellow Rotary Disconnector with Handle and Shaft (40A, 3P)
    Weg

    MSW 40 B-3 H

    Red and Yellow Rotary Disconnector with Handle and Shaft (40A, 3P)

    $44.78
    $102.00
  • OHB65J6E00S | ABB Pstl Hdl 6X65 Side Op
    ABB

    OHB65J6E00S

    Pstl Hdl 6X65 Side Op

    $69.14
    $92.17
  • OHB95J12 | ABB Pistol Hdl 95Mm Ul Type 3R,12
    ABB

    OHB95J12

    Pistol Hdl 95Mm Ul Type 3R,12

    $91.61
    $135.99
  • OHBS2AJ | ABB Sel.Handle Black N3R/12
    ABB

    OHBS2AJ

    Sel.Handle Black N3R/12

    $25.93
    $38.48
  • OT100FT3 | ABB 3P Sw 100A Ul98 Nf Door Mount Sw
    ABB

    OT100FT3

    3P Sw 100A Ul98 Nf Door Mount Sw

    $193.91
    $287.87
  • OT600U13 ABB Disconnector Switch (4 Pole, 600 Amps)
    ABB

    OT600U13

    Disconnector Switch (4 Pole, 600 Amps)

    $2,661.69
    $6,077.35
  • OTDC250UFV11 | ABB 2P 250A Pv Sw 1500Vdc
    ABB

    OTDC250UFV11

    2P 250A Pv Sw 1500Vdc

    $1,188.79
    $2,941.20
  • OXP6X150 | ABB Pistol Shaft 5.9In 6X150
    ABB

    OXP6X150

    Pistol Shaft 5.9In 6X150

    $10.38
    $15.40
  • OXP6X290 | ABB Pistol Shaft 11.4In 6X290
    ABB

    OXP6X290

    Pistol Shaft 11.4In 6X290

    $17.29
    $25.66
  • OXS6X120 | ABB Sel Shaft 6X120
    ABB

    OXS6X120

    Sel Shaft 6X120

    $3.45
    $5.13
  • OZXA33-BAR | ABB 3P Jumper Bars Ot16 40F3C
    ABB

    OZXA33-BAR

    3P Jumper Bars Ot16 40F3C

    $118.21
    $138.18
  • PHR1N4XF | Rotary disconnect external front pistol handle
    Eaton

    PHR1N4XF

    Rotary disconnect external front pistol handle

    $120.48
    $342.73
  • R5A3016U | Eaton Rotary Handle
    Eaton

    R5A3016U

    Rotary Handle

    $65.94
    $187.60
  • R9D3200U | Eaton Rotary Disconnects
    Eaton

    R9D3200U

    Rotary Disconnects

    $724.25
    $2,060.46
  • XTPAXUVR480V60H | Eaton 480V/60Hz Undervoltage Release
    Eaton

    XTPAXUVR480V60H

    480V/60Hz Undervoltage Release

    $52.83
    $213.33
  • B60NARNM Eaton Air Conditioning Disconnect (60 Amps, 120/240V, 10 kAIC)
    Eaton

    B60NARNM

    Air Conditioning Disconnect (60 Amps, 120/240V, 10 kAIC)

    $127.89
    $812.59
  • EOT520N3PAP-SBA ABB Enclosed Non-Fused Disconnect Switch (16A, 3 Pole, 600VAC)
    ABB

    EOT520N3PAP-SBA

    Enclosed Non-Fused Disconnect Switch (16A, 3 Pole, 600VAC)

    $248.63
    $300.00
  • MPW80-3-U050 | Motor Protector | Weg
    Weg

    MPW80-3-U050

    Motor Protector

    $175.18
    $380.00
  • MSW 80 P-3 H
    Weg

    MSW 80 P-3 H

    Disconnect Switch w/ Handle (Red/Yellow)

    $64.97
    $148.00
  • MSW H 160 B | Rotary Handle and Shaft
    Weg

    MSW H 160 B

    Rotary Handle and Shaft

    $28.54
    $65.00
  • MSW H 40 B
    Weg

    MSW H 40 B

    Rotary Handle and Shaft

    $18.44
    $42.00
  • OHB175J12 | ABB Handle Ip65 175Mm Blk
    ABB

    OHB175J12

    Handle Ip65 175Mm Blk

    $86.43
    $128.29
  • OHB175L12EH | ABB Pstl Hdl 175X12 4X Ss Hasp
    ABB

    OHB175L12EH

    Pstl Hdl 175X12 4X Ss Hasp

    $337.03
    $612.77
  • OS30FACC12 | ABB Switch Fuse
    ABB

    OS30FACC12

    Switch Fuse

    $266.15
    $395.10

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.