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.

  • OX6X85 | ABB Shaft
    ABB

    OX6X85

    Shaft

    $5.46
    $7.50
  • OXC1L108 | ABB Oh Hdl Flange Cable 108In
    ABB

    OXC1L108

    Oh Hdl Flange Cable 108In

    $411.60
    $590.02
  • OXC1L36 | ABB 36 Cable
    ABB

    OXC1L36

    36 Cable

    $197.09
    $283.28
  • OXC1L48 | ABB Oh Hdl Flange Cable 48In
    ABB

    OXC1L48

    Oh Hdl Flange Cable 48In

    $252.50
    $438.93
  • OXC1L60 | ABB Oh Hdl Flange Cable 60In
    ABB

    OXC1L60

    Oh Hdl Flange Cable 60In

    $277.03
    $462.58
  • OXC1L72 | ABB Oh Hdl Flange Cable 72In
    ABB

    OXC1L72

    Oh Hdl Flange Cable 72In

    $303.15
    $356.93
  • OXC1L84 | ABB Oh Hdl Flange Cable 84In
    ABB

    OXC1L84

    Oh Hdl Flange Cable 84In

    $352.23
    $414.98
  • OXC1L96 | ABB Oh Hdl Flange Cable 96In
    ABB

    OXC1L96

    Oh Hdl Flange Cable 96In

    $382.30
    $945.87
  • OXN250 | ABB Terminal Pole Ot200
    ABB

    OXN250

    Terminal Pole Ot200

    $233.34
    $336.55
  • OXN400 | ABB Terminal Pole For Ot400
    ABB

    OXN400

    Terminal Pole For Ot400

    $211.71
    $248.78
  • OXP10/6X500 | ABB Oxp 10/6Mm Hybrid Shaft 500Mm
    ABB

    OXP10/6X500

    Oxp 10/6Mm Hybrid Shaft 500Mm

    $183.44
    $272.31
  • OXP12X250 | ABB Pistol Shaft 9.8Ft 12X250
    ABB

    OXP12X250

    Pistol Shaft 9.8Ft 12X250

    $27.66
    $41.06
  • OXP12X280 | ABB Shaft,Pistoltype 12X280Mm
    ABB

    OXP12X280

    Shaft,Pistoltype 12X280Mm

    $31.11
    $46.18
  • OXP12X280-45 | ABB Pstl Shaft 11.012X280X45
    ABB

    OXP12X280-45

    Pstl Shaft 11.012X280X45

    $31.11
    $45.97
  • OXP12X325 | ABB Shaft - 1Sca022042R5810
    ABB

    OXP12X325

    Shaft - 1Sca022042R5810

    $34.56
    $51.30
  • OXP12X325-45 | ABB Pstl Shaft 11.8 12X325-45
    ABB

    OXP12X325-45

    Pstl Shaft 11.8 12X325-45

    $34.56
    $49.27
  • OXP12X465 | ABB Pstl Shaft 18.3 12X465
    ABB

    OXP12X465

    Pstl Shaft 18.3 12X465

    $41.49
    $61.58
  • OXP12X465-45 | ABB Pstl Shaft 18.3 12X465 45Twst
    ABB

    OXP12X465-45

    Pstl Shaft 18.3 12X465 45Twst

    $41.48
    $59.48
  • OXP12X535 | ABB 12Mm Shaft 535Mm
    ABB

    OXP12X535

    12Mm Shaft 535Mm

    $44.94
    $66.71
  • OXP12X625 | ABB Pstl Shaft 24.6 12X625
    ABB

    OXP12X625

    Pstl Shaft 24.6 12X625

    $60.49
    $89.80
  • OXP6X108 | ABB Pstl Shaft 6X108
    ABB

    OXP6X108

    Pstl Shaft 6X108

    $10.38
    $16.12
  • OXP6X119V2 | ABB Shaft Support For Carrier
    ABB

    OXP6X119V2

    Shaft Support For Carrier

    $9.86
    $14.13
  • OXP6X130 | ABB Pstl Shaft 5.2In 6X130
    ABB

    OXP6X130

    Pstl Shaft 5.2In 6X130

    $10.38
    $15.40
  • OXP6X158 | ABB Pistol Shaft 6.2In 6X158
    ABB

    OXP6X158

    Pistol Shaft 6.2In 6X158

    $11.41
    $16.95
  • OXP6X161 | ABB Shaft For Pist. Hdls L=161Mm D=6Mm
    ABB

    OXP6X161

    Shaft For Pist. Hdls L=161Mm D=6Mm

    $13.86
    $20.58
  • OXP6X170 | ABB Shaft - 1Sca108224R1001
    ABB

    OXP6X170

    Shaft - 1Sca108224R1001

    $13.83
    $20.53
  • OXP6X210 | ABB Pistol Shaft 8.3In 6X210Mm
    ABB

    OXP6X210

    Pistol Shaft 8.3In 6X210Mm

    $13.83
    $20.53
  • OXP6X210-45 | ABB Pstl Shaft 8.3 6X210 45Twst
    ABB

    OXP6X210-45

    Pstl Shaft 8.3 6X210 45Twst

    $13.84
    $17.12

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.