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Manufacturer Resources
Product Specs
- Amperage Rating:
- 7E
- Class:
- Class E
- Notes:
- Also Used in RDB Fuseholders. Mountings are no longer available for use with BA refills, but a small range of replacement fuse holders are still available. New and replacement applications should use RBA fuses that have superseded BA fuses.
- Voltage Rating:
- 7.2 kV
- Department:
- Electrical
- Product Type:
- RBA4
- Product Length:
- 7.62 IN
- Product Details:
- RBA4
- Product Height:
- 2.2 IN
- Product Width:
- 2.2 IN
B-LINE 8RBA4-7E – Frequently Asked Questions
1) What voltage and amp rating is the B-Line 8RBA4-7E fuse refill?
The 8RBA4-7E is a 7.2 kV expulsion fuse refill rated 7E, which is a Class E rating. Class E ratings are used on medium voltage power fuses for transformer and feeder protection, so the E suffix is part of the rating and not an option code.
2) Can I use the 8RBA4-7E refill in an old BA fuse mounting?
No. Mountings for BA refills are no longer available. The RBA fuses superseded the BA line, so new and replacement work should be built around RBA. A small range of replacement fuse holders is still made for these refills.
3) Does the 8RBA4-7E fit RDB fuseholders?
Yes, the RBA4 refill is also used in RDB fuseholders in addition to its RBA holder.
4) Is the 8RBA4-7E a complete fuse or just the replaceable element?
It is a refill, meaning the expendable expulsion element that drops into an existing RBA (or RDB) fuseholder after a clearing operation. You do not get the holder or mounting with it, so the holder has to already be in place on the opening.
5) Can I put a 7.2 kV RBA refill on a 15 kV system?
No. The refill is rated 7.2 kV, and that rating is the ceiling for the circuit it protects. For distribution above that you need a fuse rated at or above the system voltage.
6) What is the exact part number to order this B-Line expulsion refill?
Order as B-Line 8RBA4-7E. The 8 prefix and the 7E suffix both matter: 7E is the Class E current rating and the RBA4 identifies the refill series.
How fast can I get the B-LINE 8RBA4-7E 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 8RBA4-7E come with a warranty?
Absolutely. The B-LINE 8RBA4-7E 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 8RBA4-7E?
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 8RBA4-7E 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.