Fusible Disconnects
Current Midwest Carries Reconditioned Fusible Disconnects
Current Midwest carries cost-saving reconditioned fusible disconnect switches ranging from 30 to 4000 Amps in NEMA 1, 3r, and 12. Our inventory includes general duty, heavy duty, and weatherproof (outdoor) fusible switches from the leading manufacturers including ABB, Cutler Hammer, Eaton, GE, Siemens, Square D, and many other top brands.
All used fusible disconnects sold by Current Midwest are thoroughly inspected and reconditioned, tested for performance and safety, and come with a three-year warranty to provide you with safe, dependable electrical gear.
Fusible Disconnect Switches for Industrial Applications
Fusible disconnects combine a manual transfer switch with embedded fuse protection to isolate circuits and protect workers and equipment. They provide an easy way to open and close the circuit as well as to provide overcurrent protection. Unlike circuit breakers, these switches cannot be reset after a fault but react much faster in the event of a severe short.
While circuit breakers are commonly used in residential or light commercial panels, fusible disconnect switches are often used in high-current industrial and commercial installations requiring guaranteed circuit protection capability provided by a fuse disconnection. Some examples of these applications include HVAC systems, motor control circuits, compressors and pumps, air handler units, manufacturing equipment, and service disconnects. A fusible disconnect switch simplifies the process to disconnect and reconnect power, safely isolates a circuit to stop the electrical current flow, and provides critical protection to equipment and team members during installations, maintenance, and servicing.
When to Use Fusible vs. Non-Fusible Disconnects
Understanding the difference helps ensure proper protection.
Fusible disconnects include integrated fuses, provide overcurrent and short-circuit protection, and are best for motors, compressors, and critical equipment.
Non-fusible disconnects don’t feature fuses for added protection. This means that although it serves the same general function as a fusible disconnect, it does not offer any built-in safeguards against overloads and short circuits. Instead, non-fusible disconnects rely on upstream protection such as existing fuses and circuit breakers, and are only suitable when that protection already exists
Installation and Maintenance Tips
As with all high-voltage electrical installations, fusible disconnect switches should only be serviced by experienced and qualified electricians. For safe operation and long-term reliability:
- Use the correct fuse size and type
- Match the disconnect’s amp rating to the load
- Select the proper NEMA enclosure for the environment
- Ensure compliance with NEC and local codes
- Perform regular visual inspections for signs of wear or damage
- Always de-energize the circuit before servicing and wear PPE
Common Types and Sizes of Fusible Disconnects
| Amps | Voltages | Configurations | NEMA Rating |
| 30 | 240VAC | 3 Pole | 1 |
| 60 | 480VAC | 3r | |
| 100 | 600VAC | 12 | |
| 200 | |||
| 400 | |||
| 600 | |||
| 800 | |||
| 1200 | |||
| 1600 | |||
| 2000 | |||
| 3000 | |||
| 4000 |
What types of installations use fusible disconnect switches?
Fusible disconnect switches are commonly used in commercial and industrial installations, including manufacturing environments and processing plants, to rapidly disconnect circuits from the power supply. They provide a crucial safety feature by interrupting the flow of electricity automatically in the case of an emergency, such as when the current exceeds a circuit’s capacity, or manually when a circuit must be shut down to safely allow maintenance work to be completed.
You can depend on quick fulfillment and the highest levels of customer service from Current Midwest. We are your go-to resource for reconditioned industrial electrical equipment.
Frequently Asked Questions About Fusible Disconnect Switches
Where can I buy used or reconditioned fusible disconnect switches near me?
Used and reconditioned fusible disconnect switches can be purchased from specialized industrial electrical suppliers like Current Midwest, which offers nationwide shipping and fast fulfillment.
Unlike local distributors with limited stock, Current Midwest maintains a large inventory of in-stock disconnect switches and can quickly ship equipment to minimize downtime. If a specific model is not available, our team can source it through an extensive supplier network.
Are reconditioned fusible disconnect switches reliable?
Yes. When properly reconditioned and tested, fusible disconnect switches provide reliable performance comparable to new equipment.
At Current Midwest, all reconditioned disconnects are:
- Fully inspected and tested
- Evaluated for electrical performance and safety
- Backed by a 3-year warranty
This makes them a dependable and cost-effective option for industrial applications.
What size fusible disconnect switch do I need?
The correct size depends on the electrical load and application requirements.
Key factors include:
- Amp rating of the circuit
- Voltage requirements
- Type of equipment being protected
- Environmental conditions (NEMA rating)
Choosing the correct size ensures proper protection and prevents equipment damage or safety risks. A qualified electrician or supplier can help confirm the right specification.
Are fusible disconnects better than circuit breakers?
Fusible disconnects and circuit breakers serve different purposes.
Fusible disconnects:
- React faster to high fault currents
- Provide strong short-circuit protection
- Require fuse replacement after activation
Circuit breakers:
- Can be reset after tripping
- Offer convenience for repeated use
Fusible disconnects are often preferred in industrial applications where fast fault protection is critical.
How quickly can fusible disconnect switches ship?
Many fusible disconnect switches are available for immediate shipment, especially reconditioned units.
At Current Midwest:
- Many units ship within 24–72 hours
- Large inventory reduces lead times
- Hard-to-find models can often be sourced quickly
Fast availability is one of the main advantages of choosing reconditioned equipment.
What is the difference between fusible and non-fusible disconnect switches?
Fusible disconnect switches include built-in fuses that provide overcurrent and short-circuit protection.
Non-fusible disconnects:
- Do not include internal protection
- Rely on upstream breakers or fuses
Fusible disconnects are typically used when additional protection is required at the equipment level.
Can I use a reconditioned disconnect in a new installation?
Yes, in many cases reconditioned fusible disconnect switches can be used in new installations, provided they meet code requirements and application specifications.
All installations should follow:
- NEC guidelines
- Local electrical codes
- Manufacturer and application requirements
Always consult a qualified electrician before installation.