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.

  • ER53030UPGB | Eaton Enclosed Rotary Disconnect Switch (30 Amps, 3 Pole, 600VAC)
    Eaton

    ER53030UPGB

    Enclosed Rotary Disconnect Switch (30 Amps, 3 Pole, 600VAC)

    $396.46
    $773.60
  • OS800L03 | ABB 3P 800A Fusible Sw
    ABB

    OS800L03

    3P 800A Fusible Sw

    $4,268.64
    $6,336.81
  • OTDC200U11 | ABB Switch-Disconnector
    ABB

    OTDC200U11

    Switch-Disconnector

    $717.44
    $1,012.22
  • OTZW8 | ABB 6,8P Mech Ot16-100 W/1 Shaft
    ABB

    OTZW8

    6,8P Mech Ot16-100 W/1 Shaft

    $51.85
    $76.98
  • 0165509LS Baco Controls 100A 3P Disc Sw, Long Shaft Door Interlock, Yel/Red Pad
    Baco Controls

    0165509LS

    100A 3P Disc Sw, Long Shaft Door Interlock, Yel/Red Pad

    $189.99
    $200.12
  • 172500 Baco Controls 100A 3P Disc Sw, Body Only
    Baco Controls

    172500

    100A 3P Disc Sw, Body Only

    $96.95
    $174.64
  • BBS54-4 | Motor protective circuit breaker | Weg
    Weg

    BBS54-4

    Motor protective circuit breaker

    $20.75
    $45.00
  • BBSP45-3 | Weg Distribution Busbar
    Weg

    BBSP45-3

    Distribution Busbar

  • ER54030UD | Eaton Enclosed Rotary Disconnect Switch (30 Amps, 4 Pole, 600VAC)
    Eaton

    ER54030UD

    Enclosed Rotary Disconnect Switch (30 Amps, 4 Pole, 600VAC)

    $806.83
    $1,574.27
  • MPW40-3-D063 (4.0-6.3 A)
    Weg

    MPW40-3-D063

    MPW40-3-D063 (4.0-6.3 A)

    $63.16
    $137.00
  • MRX65-130E | Weg Rotary Handle
    Weg

    MRX65-130E

    Rotary Handle

    $55.32
    $120.00
  • MSW 80 B-3 H
    Weg

    MSW 80 B-3 H

    Disconnect Switch w/ Handle and Shaft (Red/Yellow)

    $73.31
    $167.00
  • NFPA79JKL | Eaton Rotary disconnect NEPA 79 "through the door" kit
    Eaton

    NFPA79JKL

    Rotary disconnect NEPA 79 "through the door" kit

    $352.15
    $1,001.84
  • OHB275J12 | ABB Pstl Hdl 12X275 Black 3R,12
    ABB

    OHB275J12

    Pstl Hdl 12X275 Black 3R,12

    $146.90
    $218.08
  • OHB95J12T | ABB Pstl Hdl 95Mm N3R/12 Test Pos
    ABB

    OHB95J12T

    Pstl Hdl 95Mm N3R/12 Test Pos

    $104.35
    $200.13
  • OT100F6 | ABB 6P Sw 100A Nf Ul98
    ABB

    OT100F6

    6P Sw 100A Nf Ul98

    $450.29
    $1,020.63
  • OT16FT3 | ABB 3P 16A Ul508 Nf Door Mount Sw
    ABB

    OT16FT3

    3P 16A Ul508 Nf Door Mount Sw

    $62.78
    $93.19
  • OT63F6 | ABB 6P 60A UL 508 NF SW
    ABB

    OT63F6

    6P 60A Ul 508 Nf Sw

    $247.14
    $366.88
  • OXP12X395 | ABB Pistol Shaft 15.6In 12X395
    ABB

    OXP12X395

    Pistol Shaft 15.6In 12X395

    $38.03
    $56.44
  • OZ331SPB | ABB Rcs Rnd Pdlk Hdl 4X
    ABB

    OZ331SPB

    Rcs Rnd Pdlk Hdl 4X

    $66.18
    $94.51
  • OZXA402 | ABB Mechanical Lug Kit
    ABB

    OZXA402

    Mechanical Lug Kit

    $181.48
    $200.28
  • PHB3N4XF | Eaton Rotary Disconnect Handles
    Eaton

    PHB3N4XF

    Rotary Disconnect Handles

    $406.33
    $1,155.98
  • PHR1N4XS | Rotary disconnect external front pistol handle
    Eaton

    PHR1N4XS

    Rotary disconnect external front pistol handle

    $120.48
    $342.73
  • 172301 Baco Controls 63A 3P Disc Sw, Panel Mnt, Yel/Red Pad
    Baco Controls

    172301

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

    $59.15
    $106.55
  • 174189 Baco Controls Conversion Kit for Clutch Drive Short Shaft
    Baco Controls

    174189

    Conversion Kit for Clutch Drive Short Shaft

    $8.96
    $16.14
  • BBS54-3 | Motor protective circuit breaker | Weg
    Weg

    BBS54-3

    Motor protective circuit breaker

    $16.14
    $35.00
  • DH362UWK Eaton Heavy Duty Single-Throw Non-Fused Safety Switch (60 Amps, 600V, Three-pole, Three-wire)
    Eaton

    DH362UWK

    Heavy Duty Single-Throw Non-Fused Safety Switch (60 Amps, 600V, Three-pole, Three-wire)

    $3,052.56
    $6,313.47

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.