Bussmann Edison Base Type S Pl...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$16.60
Bussmann Edison Base Type S Plug Fuse Adapter

Bussmann Edison Base Type S Plug Fuse Adapter

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Model: SA-20

In Stock (leaves warehouse same day if ordered before 3pm ET)

$16.60
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Bussmann Edison Base Type S Plug Fuse Adapter

The Bussmann Edison Base Type S Plug Fuse Adapter, also known as a Fustat adapter, is an Eaton Bussmann series component designed for industrial and commercial grade electrical service panels equipped with standard Edison base fuse holders. This adapter family is rated 125V and is available in ratings from 10A to 20A, with each rating sized to accept a matching range of Type S (Fustat) fuses: the 10A version accepts S-10 through S-7, while the 20A version accepts S-20. Threaded directly into an existing Edison base socket, the adapter lets electricians upgrade older Edison base panels to the tamper-resistant, non-interchangeable Type S fuse platform without replacing the panelboard or the fuse holder itself. Because each adapter is sized to its rated amperage, it physically limits the circuit so that only a correctly rated Type S fuse can be installed, helping maintain proper overcurrent protection at the panel. This adapter is commonly specified when a facility needs to standardize on Type S fuse protection across multiple panels while keeping existing Edison base fuse holders in service, avoiding the cost and downtime of a full panelboard replacement.

Key Features

  • Amperage Rating: Available in ratings from 10A to 20A, sizing the adapter so only a correctly rated Type S fuse can be installed in the socket.
  • Voltage Rating: 125V rating suited to standard branch-circuit fuse panels.
  • Edison Base Compatibility: Threads into a standard Edison base fuse holder, allowing retrofit of existing plug fuse sockets.
  • Type S Fuse Range: The 10A adapter accepts Type S (Fustat) fuses from S-10 to S-7, and the 20A adapter accepts S-20, supporting the non-interchangeable Type S fuse system.
  • Industrial/Commercial Grade: Constructed for industrial and commercial grade electrical distribution equipment.
  • Tamper-Resistant Design: Once seated in the Edison base socket, the adapter is intended to remain in place, discouraging removal or bypass with a standard plug fuse.
  • Fuse Adapter Function: Serves as a fuse reducer/adapter rather than a fuse itself, bridging Edison base hardware with Type S fuse protection.

Technical Specifications

  • Amperage Rating: 10A

Manufacturer Resources

Product Specs

Product Type:
Fuse Adapter
Amperage Rating:
10A - 20A
Voltage Rating:
125V
Configuration:
Edison Base to Type S
Grade:
Industrial/Commercial
Department:
Electrical
Product Subgroup:
Fuse Holders & Blocks
list_batch:
BUSS-20260919
Product Details:
Fuse Adapter
Product Group:
Circuit Protection
Product Height:
9.63 in
Product Length:
13.31 in
Product Width:
1.94 in

Bussmann SA-20 – Frequently Asked Questions

1) Will a Bussmann Type S fuse adapter thread into my existing Edison base fuse panel?
Yes. The Bussmann Edison Base Type S plug fuse adapter screws straight into a standard Edison base fuse holder, so the panelboard and the existing sockets stay in service. Once seated, the adapter converts that socket to the non-interchangeable Type S (Fustat) system, and it is meant to stay in place rather than be removed.
2) Which Bussmann fuse adapter do I need, SA-10 or SA-20?
Match the adapter to the circuit's amperage. The SA-10 is the 10 amp adapter and accepts Type S fuses S-10 through S-7; the SA-20 is the 20 amp version and accepts S-20. Because each adapter is physically sized to its rating, once it is installed only a correctly rated Type S fuse will fit, so pick by the branch circuit you are protecting, not by what fuse is on the truck.
3) Is the Bussmann Type S adapter a fuse, or do I still have to buy fuses separately?
It is an adapter, not a fuse. The SA-10 and SA-20 are fuse reducers that bridge Edison base hardware to the Type S platform, so you order Type S (Fustat) fuses in the matching size separately: S-10 through S-7 for the 10 amp adapter, S-20 for the 20 amp.
4) What voltage is the Bussmann Type S fuse adapter rated for?
125V, which covers standard 120V branch-circuit plug fuse panels. If the panel in question is a higher voltage or cartridge fuse application, a plug fuse adapter is not the right part for it.
5) Can I standardize a whole building on Type S fuses without replacing the fuse panels?
Yes, that is the typical specification. Installing these adapters in the existing Edison base holders converts each socket to Type S protection across multiple panels while keeping the panelboards and holders in service, avoiding the cost and downtime of a full panelboard swap. You will need one adapter per fuse socket, sized to each circuit.
6) Is the Bussmann Fustat adapter suitable for commercial service panels or just residential?
The adapter is built to industrial and commercial grade for electrical service panels with standard Edison base fuse holders, which is why it shows up in multi-family, light industrial, and older commercial buildings that still run plug fuse panels. Ratings span 10A to 20A at 125V.
How fast can I get the Bussmann SA-20 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Bussmann SA-20 come with a warranty?
Absolutely. The Bussmann SA-20 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Bussmann SA-20?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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