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.

  • OHB80J6 | ABB Pstl Hdl 6X80Mm Black 1,3R,12
    ABB

    OHB80J6

    Pstl Hdl 6X80Mm Black 1,3R,12

    $77.78
    $115.45
  • OHB80J6BEH | ABB Pstl Brk Hdl 6X80Mm Black 4,4X,
    ABB

    OHB80J6BEH

    Pstl Brk Hdl 6X80Mm Black 4,4X,

    $203.83
    $504.28
  • OHB80J6E001S | ABB Pstl Hdl 6X80Mm Blk Side Op
    ABB

    OHB80J6E001S

    Pstl Hdl 6X80Mm Blk Side Op

    $69.14
    $171.05
  • OHB80J6E00B | ABB Pstl Hdl Mirror Image 6X80
    ABB

    OHB80J6E00B

    Pstl Hdl Mirror Image 6X80

    $95.08
    $127.37
  • OHB80J6E011 | ABB Pstl Hdl 3-Pos 6X80 Blk 3R,12
    ABB

    OHB80J6E011

    Pstl Hdl 3-Pos 6X80 Blk 3R,12

    $97.83
    $145.23
  • OHB80J6E20 | ABB Hndl 80X6 3R/12 Pl I/O
    ABB

    OHB80J6E20

    Hndl 80X6 3R/12 Pl I/O

    $99.39
    $144.82
  • OHB80L6E011 | ABB Pstl Hdl 3-Pos 6X80 4,4X,12
    ABB

    OHB80L6E011

    Pstl Hdl 3-Pos 6X80 4,4X,12

    $133.95
    $156.78
  • OHB95J12E311 | ABB Pstl Hdl 3-P 12X95 Black 3R, 12
    ABB

    OHB95J12E311

    Pstl Hdl 3-P 12X95 Black 3R, 12

    $104.35
    $139.97
  • OHB95J12EH | ABB Pstl Hdl 95X12 3R,12 Ss Hasp
    ABB

    OHB95J12EH

    Pstl Hdl 95X12 3R,12 Ss Hasp

    $228.28
    $347.60
  • OHB95L10 | ABB Pistol Hdl 95Mm Ul Type 4,4X (Blac
    ABB

    OHB95L10

    Pistol Hdl 95Mm Ul Type 4,4X (Blac

    $236.43
    $350.97
  • OHB95L10EH | ABB 10X95Mm Pistol Handle W/Ss Hasp
    ABB

    OHB95L10EH

    10X95Mm Pistol Handle W/Ss Hasp

    $300.78
    $497.60
  • OHBS10AJ | ABB Sel Hdl Blk On-Off
    ABB

    OHBS10AJ

    Sel Hdl Blk On-Off

    $60.49
    $89.80
  • OHBS11 | ABB Direct Hdl 3Pl 6Mm Black
    ABB

    OHBS11

    Direct Hdl 3Pl 6Mm Black

    $14.70
    $20.17
  • OHBS12 | ABB Direct Mt Hdl Ot16-40 Xfer
    ABB

    OHBS12

    Direct Mt Hdl Ot16-40 Xfer

    $13.86
    $20.58
  • OHBS13 | ABB Black Hdl Direct Ot160
    ABB

    OHBS13

    Black Hdl Direct Ot160

    $19.01
    $46.93
  • OHBS1AH1 | ABB Sel Hdl Blk N1
    ABB

    OHBS1AH1

    Sel Hdl Blk N1

    $19.01
    $28.22
  • OHBS1PH | ABB Sel Hdl Blk N1 Door Mnt
    ABB

    OHBS1PH

    Sel Hdl Blk N1 Door Mnt

    $19.01
    $28.22
  • OHBS1RH | ABB Sel Hdl Blk N1 Screw Mnt
    ABB

    OHBS1RH

    Sel Hdl Blk N1 Screw Mnt

    $19.01
    $28.22
  • OHBS2/1 | ABB Drct Mnt Hndl For Ot63...125F3/F4
    ABB

    OHBS2/1

    Drct Mnt Hndl For Ot63...125F3/F4

    $10.08
    $14.96
  • OHBS2AJ1 | ABB Rotary Disconnect Handle
    ABB

    OHBS2AJ1

    Rotary Disconnect Handle

    $24.20
    $35.93
  • OHBS2AJ1EH | ABB Sel.Handle Black N3R/12 Metal Hasp
    ABB

    OHBS2AJ1EH

    Sel.Handle Black N3R/12 Metal Hasp

    $79.09
    $117.40
  • OHBS2AJE20 | ABB Selector Hdl,Blk,P/L Off,On
    ABB

    OHBS2AJE20

    Selector Hdl,Blk,P/L Off,On

    $26.09
    $36.77
  • OHBS2PJ | ABB Sel Hdl Blk Door Mnt Snap-On
    ABB

    OHBS2PJ

    Sel Hdl Blk Door Mnt Snap-On

    $22.83
    $33.88
  • OHBS2PJEH | ABB Handle
    ABB

    OHBS2PJEH

    Handle

    $113.34
    $165.35
  • OHBS2RJ | ABB Sel Hdl Blk Door Mnt W/Screws
    ABB

    OHBS2RJ

    Sel Hdl Blk Door Mnt W/Screws

    $24.20
    $35.93
  • OHBS2RJE20 | ABB Sel Hdl Blk Dr Mnt W/Scw P/L
    ABB

    OHBS2RJE20

    Sel Hdl Blk Dr Mnt W/Scw P/L

    $26.79
    $32.60
  • OHBS2RN | ABB Sel Hdl Blk Door Mnt W/Screws Ip65
    ABB

    OHBS2RN

    Sel Hdl Blk Door Mnt W/Screws Ip65

    $31.79
    $40.05

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.