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.

  • OHY175L12 | ABB Pstl Hdl 12X175Mm Red/Yel 4,4X
    ABB

    OHY175L12

    Pstl Hdl 12X175Mm Red/Yel 4,4X

    $120.98
    $179.59
  • OHY200J12P | ABB 12X200Mm T-Style Disc,Hdl Red
    ABB

    OHY200J12P

    12X200Mm T-Style Disc,Hdl Red

    $120.98
    $176.62
  • OHY274J12 | ABB Pistol Hdl 12X274Mm Blk 1,3R,12 R/
    ABB

    OHY274J12

    Pistol Hdl 12X274Mm Blk 1,3R,12 R/

    $164.19
    $243.74
  • OHY45J6 | ABB Pistol Hdl,45Mm,Ul Type 3R,12
    ABB

    OHY45J6

    Pistol Hdl,45Mm,Ul Type 3R,12

    $60.49
    $89.80
  • OHY45L6 | ABB Pstl Hdl 6X45Mm Yel 4,4X
    ABB

    OHY45L6

    Pstl Hdl 6X45Mm Yel 4,4X

    $103.70
    $153.95
  • OHY65J6 | ABB Pstl Hdl 6X65Mm Red/Yel 3R,12
    ABB

    OHY65J6

    Pstl Hdl 6X65Mm Red/Yel 3R,12

    $69.14
    $102.63
  • OHY65J6E00S | ABB Pstl Hdl 6X65 Side Op
    ABB

    OHY65J6E00S

    Pstl Hdl 6X65 Side Op

    $69.14
    $79.93
  • OHY65J6E011 | ABB Pstl Hdl Xfer 6X65Mm N3R/12
    ABB

    OHY65J6E011

    Pstl Hdl Xfer 6X65Mm N3R/12

    $77.78
    $112.97
  • OHY65J6T | ABB R/Y Pistol Hdl 6X65Mm Test
    ABB

    OHY65J6T

    R/Y Pistol Hdl 6X65Mm Test

    $69.14
    $89.38
  • OHY65L10 | ABB Pistol Hdl 65Mm Ul Type 4,4X
    ABB

    OHY65L10

    Pistol Hdl 65Mm Ul Type 4,4X

    $70.56
    $96.73
  • OHY65L6 | ABB Pstl Hdl 6X65Mm Yel 4,4X
    ABB

    OHY65L6

    Pstl Hdl 6X65Mm Yel 4,4X

    $103.70
    $153.95
  • OHY65L6EH | ABB R/Y Pstl Hdl 65X6 4X Ss Hasp
    ABB

    OHY65L6EH

    R/Y Pstl Hdl 65X6 4X Ss Hasp

    $250.61
    $372.03
  • OHY80L6 | ABB Pstl Hdl 6X80Mm Red/Yel 4,4X
    ABB

    OHY80L6

    Pstl Hdl 6X80Mm Red/Yel 4,4X

    $112.34
    $166.77
  • OHY95J12 | ABB 12X95Mm R/Y Pistol Handle
    ABB

    OHY95J12

    12X95Mm R/Y Pistol Handle

    $91.61
    $135.99
  • OHY95L10 | ABB Pistol Hdl 95Mm Ul Type 4,4X
    ABB

    OHY95L10

    Pistol Hdl 95Mm Ul Type 4,4X

    $77.16
    $114.54
  • OHYS1AH1 | ABB Selector Handle Red/Yellow N1
    ABB

    OHYS1AH1

    Selector Handle Red/Yellow N1

    $19.01
    $27.85
  • OHYS1PH | ABB Sel Hdl Red/Yel N1 Door Mnt
    ABB

    OHYS1PH

    Sel Hdl Red/Yel N1 Door Mnt

    $19.01
    $21.98
  • OHYS1RH | ABB Sel Hdl Red/Yel N1 Screw Mnt
    ABB

    OHYS1RH

    Sel Hdl Red/Yel N1 Screw Mnt

    $19.01
    $26.62
  • OHYS2AJ1 | ABB Sel Hdl Red/Yel N3R/12 Non-Def
    ABB

    OHYS2AJ1

    Sel Hdl Red/Yel N3R/12 Non-Def

    $24.20
    $35.93
  • OHYS2AJE011 | ABB Sel Hdl Red/Yel N3R/12 Xfer
    ABB

    OHYS2AJE011

    Sel Hdl Red/Yel N3R/12 Xfer

    $34.56
    $51.30
  • OHYS2AJR | ABB Sel Hdl Red/Yel N3R/12 Screw Mtg 6M
    ABB

    OHYS2AJR

    Sel Hdl Red/Yel N3R/12 Screw Mtg 6M

    $25.93
    $33.52
  • OHYS2PJ | ABB Sel Hdl Red/Yel Dr Mnt Snap-On
    ABB

    OHYS2PJ

    Sel Hdl Red/Yel Dr Mnt Snap-On

    $24.20
    $35.93
  • OHYS3PH | ABB Sel Hdl Red/Yel Dr Mnt Snap-On
    ABB

    OHYS3PH

    Sel Hdl Red/Yel Dr Mnt Snap-On

    $20.74
    $30.79
  • OHYS3RH | ABB Sel Hdl Red/Yel Dr Mnt W/Screw
    ABB

    OHYS3RH

    Sel Hdl Red/Yel Dr Mnt W/Screw

    $20.74
    $30.79
  • OHYS7 | ABB Direct Mt Hdl Ot116-32 Red P/L
    ABB

    OHYS7

    Direct Mt Hdl Ot116-32 Red P/L

    $24.20
    $59.88
  • OHZX1 | ABB Hdl Sprt Brkt Nf400, Nf600
    ABB

    OHZX1

    Hdl Sprt Brkt Nf400, Nf600

    $17.08
    $58.75
  • OHZX10 | ABB Oh Pstl Hdl,Shaft Cone
    ABB

    OHZX10

    Oh Pstl Hdl,Shaft Cone

    $10.38
    $15.40
  • OHZX11 | ABB Alignment Nut
    ABB

    OHZX11

    Alignment Nut

    $7.78
    $11.55

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.