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.

  • AX4411UL Noark Auxiliary Contact, Ex9C/CR, Standard, Side Mount, 115-500A, 1NO+1NC
    Noark

    AX4411UL

    Auxiliary Contact, Ex9C/CR, Standard, Side Mount, 115-500A, 1NO+1NC

    $16.62
  • R5B3060U | Eaton Rotary disconnect switch
    Eaton

    R5B3060U

    Rotary disconnect switch

    $120.48
    $342.73
  • SHB0N12 | Eaton Rotary disconnect external selector handle
    Eaton

    SHB0N12

    Rotary disconnect external selector handle

    $76.28
    $216.99
  • 0172061| Baco Controls Enclosure Disconnect Switch (25 Amps, 3 Pole)
    Baco Controls

    172061

    Enclosure (25 Amps, 3 Pole)

    $55.31
    $143.80
  • AXFC11Q Noark Auxiliary Contact, Ex9CK, Side Mounted , Ex9CK20~90, 3P/4P, Quick Connect, 1NO/1NC
    Noark

    AXFC11Q

    Auxiliary Contact, Ex9CK, Side Mounted , Ex9CK20~90, 3P/4P, Quick Connect, 1NO/1NC

    $10.19
    $14.02
  • OHB80L6 | ABB Pistol Hdl 6X80Mm
    ABB

    OHB80L6

    Pistol Hdl 6X80Mm

    $105.99
    $157.33
  • OXP6X360 | ABB Pistol Shaft 14.2In 6X360
    ABB

    OXP6X360

    Pistol Shaft 14.2In 6X360

    $20.74
    $30.79
  • XTPB004BC1 | Eaton IEC Motor Control (2.5-4A)
    Eaton

    XTPB004BC1

    IEC Motor Control (2.5-4A)

    $85.46
    $410.89
  • OA2G11 | ABB Aux Switch 1No/1Nc Ot16-160
    ABB

    OA2G11

    Aux Switch 1No/1Nc Ot16-160

    $34.56
    $51.30
  • OHB65J6B | ABB Pstl Hdl 6X65Mm Black 1,3R,12
    ABB

    OHB65J6B

    Pstl Hdl 6X65Mm Black 1,3R,12

    $69.14
    $102.63
  • R5A3040U | Eaton Rotary disconnect switch
    Eaton

    R5A3040U

    Rotary disconnect switch

    $96.24
    $273.79
  • OHYS3AH1 | ABB Sel Hdl Red/Yel N1
    ABB

    OHYS3AH1

    Sel Hdl Red/Yel N1

    $20.74
    $30.79
  • XTPR010BC1 | Eaton IEC Manual Control (6.3-10A)
    Eaton

    XTPR010BC1

    IEC Manual Control (6.3-10A)

    $87.29
    $419.63
  • OTPS125FP | ABB 4Th-Pole Ot100
    ABB

    OTPS125FP

    4Th-Pole Ot100

    $51.33
    $76.19
  • NS3EV493-IP65 | Baco Controls PR12 ON/OFF Ground Main Switch W/IP65 Protection (12 Amps, 3 Pole)
    Baco Controls

    NS3EV493-IP65

    ON/OFF Ground Main Switch (12 Amps, 3 Pole)

    $82.99
  • OA1G01 | ABB Auxiliary Contact
    ABB

    OA1G01

    Auxiliary Contact

    $17.29
    $25.66
  • SHR00N12 | Eaton Rotary disconnect door interlocked external handle
    Eaton

    SHR00N12

    Rotary disconnect door interlocked external handle

    $31.90
    $90.76
  • 172601 Baco Controls Yel/Red 66mm Pad Handle
    Baco Controls

    172601

    Yel/Red 66mm Pad Handle

    $7.85
    $14.16
  • SHR00N4X | Eaton Rotary disconnect door interlocked external handle
    Eaton

    SHR00N4X

    Rotary disconnect door interlocked external handle

    $41.34
    $117.62
  • IB MPW100 | Weg Insulating Plate
    Weg

    IB MPW100

    Insulating Plate

    $13.83
    $30.00
  • OT40F3 | ABB Disconnect Switch, 3-P, 40A/600V,
    ABB

    OT40F3

    Disconnect Switch, 3-P, 40A/600V,

    $72.25
    $107.25
  • OTZS2 | ABB Metal Collar Ot160/200 Os100,200
    ABB

    OTZS2

    Metal Collar Ot160/200 Os100,200

    $13.04
    $19.36
  • BBSP45-2 | Weg Distribution Busbar
    Weg

    BBSP45-2

    Distribution Busbar

  • OT63FT3 | ABB Switch Disconnector (60 Amps, 3P)
    ABB

    OT63FT3

    Switch Disconnector (60 Amps, 3P)

    $98.86
    $146.77
  • XTPAXRHMB | Eaton IP65 Rotary Handle Mechanism Kit
    Eaton

    XTPAXRHMB

    IP65 Rotary Handle Mechanism Kit

    $61.05
    $246.52
  • 172300 Baco Controls 63A 3P Disc Sw, Body Only
    Baco Controls

    172300

    63A 3P Disc Sw, Body Only

    $55.76
    $100.42
  • PHB2N12F | Eaton Rotary Disconnect Handles
    Eaton

    PHB2N12F

    Rotary Disconnect Handles

    $103.38
    $294.08

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.