Bussmann T-4 Time-Delay Dual-E...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$42.59
Bussmann T-4 Time-Delay Dual-Element Plug Fuse

Bussmann T-4 Time-Delay Dual-Element Plug Fuse

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Model: T-2

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

$42.59
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Bussmann T-4 Type T Time-Delay Dual-Element Plug Fuse, 4A 125VAC

The Bussmann T-4 is an Eaton Bussmann series Type T plug fuse built for heavy-duty, time-delay overcurrent protection in plug-fuse panelboards. This dual-element fuse is rated 4A at 125VAC and delivers a 10kAIC (RMS Symmetrical) interrupt rating along with a 10kA short circuit rating, giving installers and facility maintenance teams a dependable replacement option for legacy panels that still rely on Type T threaded plug fuses. The time-delay, dual-element construction allows the T-4 to ride through momentary overload conditions, such as motor starting inrush, without nuisance tripping, while still opening quickly on sustained overloads and short-circuit fault currents. The threaded mount base allows the fuse to thread directly into a compatible Type T plug-fuse holder, making replacement fast and straightforward without special tools.

Key Features

  • Amperage Rating: 4A rating is sized for branch-circuit and equipment overcurrent protection in plug-fuse panelboards.
  • Voltage Rating: 125VAC rating matches standard residential and light commercial plug-fuse panel voltage.
  • Time-Delay Operation: time-delay characteristic allows the fuse to hold through brief overload conditions, such as motor starting inrush current, reducing nuisance opening.
  • Dual-Element Construction: dual-element design combines a short-circuit element with a thermal overload element for balanced protection against both fault currents and sustained overloads.
  • Heavy Duty Rating: heavy-duty classification supports demanding overcurrent protection duty where reliable performance is required.
  • Interrupt Rating: 10kAIC (RMS Symmetrical) interrupt rating supports dependable fault clearing on high fault-current circuits.
  • Short Circuit Rating: 10kA short circuit rating provides an added layer of protection against damaging fault currents.
  • Threaded Mount: Type T threaded base installs directly into compatible Type T plug-fuse holders for quick, tool-free replacement.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Residential and Light Commercial Plug-Fuse Panels
  • Legacy Panelboards Using Type T Threaded Fuse Holders
  • Motor and Equipment Circuits Requiring Time-Delay Protection
  • Branch Circuit Overcurrent Protection
  • Replacement Fuse for Existing Type T Fuse Holders

Why Bussmann?

Bussmann by Eaton has long been a trusted name in circuit protection, and the T-4 Type T plug fuse continues that reputation with time-delay, dual-element construction engineered for heavy-duty branch-circuit protection. Backed by a 10kAIC interrupt rating and a 10kA short circuit rating, this threaded-mount plug fuse gives electrical contractors and facility maintenance teams a dependable, code-compliant replacement for panels that use Type T plug fuses, helping keep legacy electrical systems protected and operating safely.

Manufacturer Resources

Product Specs

Product Type:
Plug Fuse
Voltage Rating:
125VAC
Connection Type:
Threaded
Series:
Type T
Department:
Electrical
Product Subgroup:
Fuses
list_batch:
BUSS-20260919
Installation Category:
Threaded
Product Details:
Time Delay
Interrupt Rating:
10 kiloamps
Product Group:
Circuit Protection

Bussmann T-2 – Frequently Asked Questions

1) Will a Bussmann Type T plug fuse thread into my existing fuse panel socket?
The Bussmann Type T plug fuse uses a threaded base that screws directly into a compatible Type T plug-fuse holder, so replacement takes no tools. It is a Type T base specifically, not an S-type (rejection base) fuse, so it will only go into a holder prepped for Type T. If your panel has had Type S adapters installed in the sockets, a Type T fuse will not thread in and you need the matching Type S fuse instead.
2) Why does my fuse blow on motor startup, and will a time-delay fuse fix it?
That is exactly what the dual-element time-delay design addresses. The Type T carries a thermal overload element alongside a short-circuit element, so it rides through the brief inrush of a motor starting without opening, then still clears on a sustained overload or a fault. If you are blowing fast-acting plug fuses on a small motor, compressor, or transformer load, a time-delay fuse of the same amp rating is the right swap.
3) What amp ratings does the Bussmann Type T time-delay plug fuse come in?
Two ratings: 2 amp (T-2) and 4 amp (T-4). Both are time-delay dual-element fuses rated 125VAC. Order by the amp rating that matches the circuit you are protecting, and never go up a size to stop a fuse blowing, the rating has to match the conductor and equipment it protects.
4) What interrupting rating does the Bussmann T-4 plug fuse have?
10 kA interrupting (10kAIC RMS symmetrical), with a 10kA short circuit rating. That matters when you are checking that the overcurrent device is rated for the available fault current at the panel, which is a question an inspector or facility engineer will ask on a legacy plug-fuse board. Ordinary non-time-delay plug fuses are often rated well below this.
5) Is a Type T plug fuse the right choice for an old fuse panel in a rental property?
If the panel's sockets are Type T threaded holders, yes, a Type T time-delay fuse is the direct like-for-like replacement and keeps the legacy board in service. Stocking a few 2A and 4A units covers low-amp branch and control circuits. For a property manager standardizing across units, note that the fuse must match the socket type in each panel, Type T and Type S bases are not interchangeable.
6) What is the difference between a dual-element and a single-element plug fuse?
A single-element fuse has one link that responds to both overload and fault current, so it opens quickly and can nuisance-blow on inrush. The Bussmann Type T is dual-element: one element handles short-circuit current, a separate thermal element handles sustained overload. That split is what gives it the time-delay characteristic and makes it suited to motor and equipment circuits rather than purely resistive lighting loads.
How fast can I get the Bussmann T-2 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 T-2 come with a warranty?
Absolutely. The Bussmann T-2 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 T-2?
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
Why buy the Bussmann T-2 from ZenSupply?
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