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.

  • AX4311UL Noark Auxiliary Contact, Ex9C/CR, Standard, Side Mount, 09-100A, 1NO+1NC
    Noark

    AX4311UL

    Auxiliary Contact, Ex9C/CR, Standard, Side Mount, 09-100A, 1NO+1NC

    $12.64
    $14.04
  • AX4402UL Noark Auxiliary Contact, Ex9C/CR, Standard, Side Mount, 115-500A, 2NC
    Noark

    AX4402UL

    Auxiliary Contact, Ex9C/CR, Standard, Side Mount, 115-500A, 2NC

    $14.68
    $16.31
  • AX4420UL Noark Auxiliary Contact, Ex9C/CR, Standard, Side Mount, 115-500A, 2NO
    Noark

    AX4420UL

    Auxiliary Contact, Ex9C/CR, Standard, Side Mount, 115-500A, 2NO

    $14.68
    $16.31
  • AX5111 Noark Ex9S32/80 Auxiliary Contact, Front Mount, 1NO + 1NC
    Noark

    AX5111

    Ex9S32/80 Auxiliary Contact, Front Mount, 1NO + 1NC

    $5.54
  • AX5120 Noark Ex9S32/80 Auxiliary Contact, Front Mount, 2NO
    Noark

    AX5120

    Ex9S32/80 Auxiliary Contact, Front Mount, 2NO

    $5.54
  • AX5202 Noark Ex9S32/80 Auxiliary Contact, Left Side, 2NC
    Noark

    AX5202

    Ex9S32/80 Auxiliary Contact, Left Side, 2NC

    $8.55
  • AX5211 Noark Ex9S32/80 Auxiliary Contacy, Left Side, 1NO + 1NC
    Noark

    AX5211

    Ex9S32/80 Auxiliary Contacy, Left Side, 1NO + 1NC

    $6.66
  • AX5220 Noark Ex9S32/80 Auxiliary Contact, Left Side, 2NO
    Noark

    AX5220

    Ex9S32/80 Auxiliary Contact, Left Side, 2NO

    $8.55
  • AXFC11 Noark Auxiliary Contact, Ex9CK, Side Mounted , Ex9CK20~90, 3P, 1NO/1NC
    Noark

    AXFC11

    Auxiliary Contact, Ex9CK, Side Mounted , Ex9CK20~90, 3P, 1NO/1NC

    $11.75
  • AXFD11 Noark Auxiliary Contact, Ex9CK, Side Mounted , Ex9CK20~40, 3P/4P, 1NO+1NC Microswitch
    Noark

    AXFD11

    Auxiliary Contact, Ex9CK, Side Mounted , Ex9CK20~40, 3P/4P, 1NO+1NC Microswitch

    $11.75
  • AXFD22 Noark Auxiliary Contact, Ex9CK, Side Mounted , Ex9CK20~40, 3P/4P, 2NO+2NC Microswitch
    Noark

    AXFD22

    Auxiliary Contact, Ex9CK, Side Mounted , Ex9CK20~40, 3P/4P, 2NO+2NC Microswitch

    $14.60
    $23.93
  • BBS54-5 | Motor protective circuit breaker | Weg
    Weg

    BBS54-5

    Motor protective circuit breaker

    $27.66
    $60.00
  • BBSP54-2 | Weg Distribution Busbar
    Weg

    BBSP54-2

    Distribution Busbar

  • BBSP54-3 | Weg Distribution Busbar
    Weg

    BBSP54-3

    Distribution Busbar

  • BBSP54-4 | Weg Distribution Busbar
    Weg

    BBSP54-4

    Distribution Busbar

  • BBSP54-5 | Weg Distribution Busbar
    Weg

    BBSP54-5

    Distribution Busbar

  • C363UC30CT | 30 Amp Switch
    Eaton

    C363UC30CT

    Rotary Disconnect Switch (30 Amps)

  • CAS11N3H1200 Noark Cassette for 2500A Frame (A25) ACB, 3 Pole, Horizontal type, 600A/800A/1200A
    Noark

    CAS11N3H1200

    Cassette for 2500A Frame (A25) ACB, 3 Pole, Horizontal type, 600A/800A/1200A

    $3,418.41
    $3,798.23
  • CAS11N3H2000 Noark Cassette for 2500A Frame (A25) ACB, 3 Pole, Horizontal type, 1600A/2000A
    Noark

    CAS11N3H2000

    Cassette for 2500A Frame (A25) ACB, 3 Pole, Horizontal type, 1600A/2000A

    $3,843.40
    $4,270.44
  • CAS11N3V1200 Noark Cassette for 2500A Frame (A25) ACB, 3 Pole, Vertical type, 600A/800A/1200A
    Noark

    CAS11N3V1200

    Cassette for 2500A Frame (A25) ACB, 3 Pole, Vertical type, 600A/800A/1200A

    $3,418.41
    $3,798.23
  • CAS11N3V2000 Noark Cassette for 2500A Frame (A25) ACB, 3 Pole, Vertical type, 1600A/2000A
    Noark

    CAS11N3V2000

    Cassette for 2500A Frame (A25) ACB, 3 Pole, Vertical type, 1600A/2000A

    $3,843.40
    $4,270.44
  • CAS11N4H1200 Noark Cassette for 2500A Frame (A25) ACB, 4 Pole, Horizontal type, 600A/800A/1200A
    Noark

    CAS11N4H1200

    Cassette for 2500A Frame (A25) ACB, 4 Pole, Horizontal type, 600A/800A/1200A

    $4,785.77
    $5,317.52
  • CAS11N4H2000 Noark Cassette for 2500A Frame (A25) ACB, 4 Pole, Horizontal type, 1600A/2000A
    Noark

    CAS11N4H2000

    Cassette for 2500A Frame (A25) ACB, 4 Pole, Horizontal type, 1600A/2000A

    $5,386.30
    $5,984.78
  • CAS11N4V1200 Noark Cassette for 2500A Frame (A25) ACB, 4 Pole, Vertical type, 600A/800A/1200A
    Noark

    CAS11N4V1200

    Cassette for 2500A Frame (A25) ACB, 4 Pole, Vertical type, 600A/800A/1200A

    $4,785.77
    $5,317.52
  • CAS11N4V2000 Noark Cassette for 2500A Frame (A25) ACB, 4 Pole, Vertical type, 1600A/2000A
    Noark

    CAS11N4V2000

    Cassette for 2500A Frame (A25) ACB, 4 Pole, Vertical type, 1600A/2000A

    $5,386.30
    $5,984.78
  • CAS12N3H1600 Noark Cassette for 3200A Frame (A32) ACB, 3 Pole, Horizontal type, 800A/1600A
    Noark

    CAS12N3H1600

    Cassette for 3200A Frame (A32) ACB, 3 Pole, Horizontal type, 800A/1600A

    $4,269.45
    $4,743.83
  • CAS12N3H2500 Noark Cassette for 3200A Frame (A32) ACB, 3 Pole, Horizontal type, 2000A/2500A
    Noark

    CAS12N3H2500

    Cassette for 3200A Frame (A32) ACB, 3 Pole, Horizontal type, 2000A/2500A

    $4,802.56
    $5,336.18
  • CAS12N3V1600 Noark Cassette for 3200A Frame (A32) ACB, 3 Pole, Vertical type, 800A/1600A
    Noark

    CAS12N3V1600

    Cassette for 3200A Frame (A32) ACB, 3 Pole, Vertical type, 800A/1600A

    $4,269.45
    $4,743.83

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.