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.

  • OHB200J12PE011 | ABB 12X200Mm 3Pos. T-Style Hdl
    ABB

    OHB200J12PE011

    12X200Mm 3Pos. T-Style Hdl

    $155.56
    $191.28
  • OHB200L12P | ABB 12X200Mm T-Style Disc, Hdl 4X
    ABB

    OHB200L12P

    12X200Mm T-Style Disc, Hdl 4X

    $190.11
    $282.23
  • OHB274J12E011 | ABB Pstl Hdl 12X274Mm 1, 3R, 12, 3 Pos
    ABB

    OHB274J12E011

    Pstl Hdl 12X274Mm 1, 3R, 12, 3 Pos

    $198.76
    $268.10
  • OHB274J12E20 | ABB Pistol Hdl 12X274Mm Blk 1,3R,12, L
    ABB

    OHB274J12E20

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

    $164.19
    $192.57
  • OHB274J12T | ABB Pstl Hdl 12X274Mm Blk N3R Test Pos
    ABB

    OHB274J12T

    Pstl Hdl 12X274Mm Blk N3R Test Pos

    $164.19
    $297.67
  • OHB274L12 | ABB Pistol Hdl 12X274Mm Blk 4, 4X
    ABB

    OHB274L12

    Pistol Hdl 12X274Mm Blk 4, 4X

    $207.40
    $307.88
  • OHB274L12T | ABB Pstl Hdl 12X274Mm Blk N4X Test Pos
    ABB

    OHB274L12T

    Pstl Hdl 12X274Mm Blk N4X Test Pos

    $207.40
    $298.93
  • OHB330J12 | ABB Pistol Hdl 12X330Mm Blk 1, 3R, 12
    ABB

    OHB330J12

    Pistol Hdl 12X330Mm Blk 1, 3R, 12

    $190.11
    $282.23
  • OHB330J12E20 | ABB L Type Hdl 12X330Mm Blk 1, 3R, 12
    ABB

    OHB330J12E20

    L Type Hdl 12X330Mm Blk 1, 3R, 12

    $294.30
    $670.52
  • OHB330L12 | ABB Pistol Hdl 12X330Mm Blk 4, 4X
    ABB

    OHB330L12

    Pistol Hdl 12X330Mm Blk 4, 4X

    $291.45
    $578.10
  • OHB4 | ABB Dirct Mount Handle Os60/100
    ABB

    OHB4

    Dirct Mount Handle Os60/100

    $51.85
    $76.98
  • OHB45J6 | ABB Pistol Hdl 6X45 Ul Type
    ABB

    OHB45J6

    Pistol Hdl 6X45 Ul Type

    $60.49
    $89.80
  • OHB45J6E311 | ABB Handle I-O-Ii For Ot16..100E3C
    ABB

    OHB45J6E311

    Handle I-O-Ii For Ot16..100E3C

    $89.68
    $133.13
  • OHB45J6EH | ABB Pstl Hdl 45X6 N12 Ss Hsp
    ABB

    OHB45J6EH

    Pstl Hdl 45X6 N12 Ss Hsp

    $196.49
    $265.00
  • OHB45L6 | ABB Pistol Hdl,45Mm,Ul Type 4/4X
    ABB

    OHB45L6

    Pistol Hdl,45Mm,Ul Type 4/4X

    $95.06
    $141.13
  • OHB65D6CM | ABB Pistol Hdl 6X65 Blk For Otm40..100
    ABB

    OHB65D6CM

    Pistol Hdl 6X65 Blk For Otm40..100

    $44.84
    $64.42
  • OHB65J6/B100 | ABB Pstl Hdl, R/B, 65Mm, Qty1=Pack100
    ABB

    OHB65J6/B100

    Pstl Hdl, R/B, 65Mm, Qty1=Pack100

    $6,913.49
    $15,788.00
  • OHB65J6E011 | ABB Pstl Hdl Xfer 6X65Mm N3R/12
    ABB

    OHB65J6E011

    Pstl Hdl Xfer 6X65Mm N3R/12

    $73.38
    $108.93
  • OHB65J6E20 | ABB Handle
    ABB

    OHB65J6E20

    Handle

    $85.61
    $98.98
  • OHB65J6E311 | ABB Pistol Handle 6X65Mm Black 1/12/3R
    ABB

    OHB65J6E311

    Pistol Handle 6X65Mm Black 1/12/3R

    $99.39
    $114.92
  • OHB65J6E69 | ABB Pstl Hdl Black 1,3R,12 For Ot_Cf 6M
    ABB

    OHB65J6E69

    Pstl Hdl Black 1,3R,12 For Ot_Cf 6M

    $69.14
    $139.23
  • OHB65J6EH | ABB Pistol Handle, Disconnect.
    ABB

    OHB65J6EH

    Pistol Handle, Disconnect.

    $203.81
    $302.57
  • OHB65J6T | ABB Pstl Hdl 6X65Mm On-Off-Test
    ABB

    OHB65J6T

    Pstl Hdl 6X65Mm On-Off-Test

    $86.43
    $99.93
  • OHB65L10 | ABB Pistol Hdl 65Mm Ul Type 4,4X
    ABB

    OHB65L10

    Pistol Hdl 65Mm Ul Type 4,4X

    $229.90
    $341.28
  • OHB65L6E20 | ABB Blk Nema 4X Pistol Hdl
    ABB

    OHB65L6E20

    Blk Nema 4X Pistol Hdl

    $77.78
    $112.97
  • OHB65L6EH | ABB Pstl Hdl 65X6 4X Ss Hasp
    ABB

    OHB65L6EH

    Pstl Hdl 65X6 4X Ss Hasp

    $250.61
    $372.03
  • OHB65LH6 | ABB Handle For Disconnect Switch Nema4X
    ABB

    OHB65LH6

    Handle For Disconnect Switch Nema4X

    $99.50
    $131.92

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.