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Manufacturer Resources
Product Specs
- Amperage Rating:
- 3A
- Class:
- Class K
- Maximum Voltage:
- 17.1 kV
- Notes:
- Mountings are no longer available for BA refills, but a limited range of replacement fuse holders are still available. New and replacement applications should use RBA fuses that have superseded BA fuses.
- Voltage Rating:
- 14.4 kV
- Department:
- Electrical
- Product Type:
- DBU
- Product Details:
- DBU
B-LINE DBU17-3K – Frequently Asked Questions
1) What voltage and amp rating is the B-Line DBU17-3K fuse refill?
The DBU17-3K is a 3 amp refill rated 14.4 kV, with a maximum voltage of 17.1 kV. Match both the system voltage and the amp rating to the original refill before ordering, since a refill element is specific to the holder and circuit it was sized for.
2) Is the DBU17-3K a complete fuse or just the replaceable element?
It is a refill, meaning the expulsion element that drops into an existing DBU fuse holder. You are not getting a mounting or a complete cutout assembly with it, so the holder has to already be in place on the pole or in the enclosure.
3) Can I still get mountings for BA refills, or do I need a different fuse for a new install?
Mountings for BA refills are no longer available, though a limited range of replacement fuse holders still is. For new installations and replacement work, use RBA fuses, which superseded the BA line. Buying a refill only makes sense when you have a serviceable holder already installed.
4) What does Class K mean on an expulsion fuse refill like the DBU17-3K?
The DBU17-3K is a Class K element. Class ratings on expulsion links describe the speed and time-current characteristic of the element, so a Class K refill must be replaced with another Class K of the same amp rating to keep the coordination the circuit was engineered around. Swapping in a different class changes how it coordinates with upstream and downstream protection.
5) Will a DBU17-3K work on a 14.4 kV distribution circuit?
Yes. The refill carries a 14.4 kV voltage rating with 17.1 kV maximum, so it covers standard 14.4 kV distribution service. Do not apply it above 17.1 kV.
6) What part number do I order for the 3 amp DBU refill?
Order by manufacturer part number DBU17-3K from B-Line. The 17 identifies the 17.1 kV maximum voltage class, the 3 is the 3 amp element, and the K is the Class K characteristic.
How fast can I get the B-LINE DBU17-3K 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 B-LINE DBU17-3K come with a warranty?
Absolutely. The B-LINE DBU17-3K 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 B-LINE DBU17-3K?
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 B-LINE DBU17-3K from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.