Bussmann 12BDGHA25 Medium Volt...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,613.55
Bussmann 12BDGHA25 Medium Voltage Air Fuse-Link, 25A, 12kV, Back-Up

Bussmann 12BDGHA25 Medium Voltage Air Fuse-Link, 25A, 12kV, Back-Up

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Model: 12BDGHA25

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

$2,613.55
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Bussmann 12BDGHA25 Medium Voltage Air Fuse-Link, 25A, 12kV, Back-Up

The Bussmann 12BDGHA25 is a medium voltage air fuse-link rated 25A at 12kV AC, purpose-built for back-up protection of primary side transformers in fuse switch combination units, fuse bases, and fuse switches. Measuring 359 x 50.8 mm with a cylindrical, bolt-on construction and a silver fuse element, this fuse-link is manufactured to British Standard (BS) requirements and includes an integral striker for positive indication of fuse operation.

Key Features

  • Trade Size: 359 x 50.8 mm cylindrical body sized to fit standard fuse bases, fuse switches, and combination units.
  • Durable Construction: Silver fuse element with a bolt-on, cylindrical body for reliable, repeatable performance under fault conditions.
  • Back-Up Class: Class back-up air fuse-link designed for coordinated protection in fuse switch combination units.
  • Electrical Rating: Rated 25A at 12kV AC with a 40 kAIC interrupt rating for demanding medium-voltage duty.
  • Striker Equipped: Built-in striker provides mechanical fault indication for fast identification of a blown fuse-link.
  • System Compatibility: Rated for 50 Hz AC systems with a resistance of 43.5 ohms.
  • Single Barrel Design: One-barrel construction for straightforward installation in compatible fuse mountings.

Certifications & Compliance

  • Manufactured to British Standard (BS) requirements
  • Contact factory for additional compliance documentation

Technical Specifications

  • Application: Protection of primary side transformers; used in fuse switch combination units, fuse bases and fuse switches
  • Barrels: 1
  • Class: Class back-up
  • Compliances: Contact factory
  • Construction Type: Bolt-on
  • Element: Silver
  • Fuse Shape: Cylindrical
  • Installation Technique: Air
  • Interrupt Rating: 40 kAIC
  • Packaging Type: Standard
  • Product Height: 64 mm
  • Product Length Depth: 374 mm
  • Product Weight: 1833.333333 g
  • Product Width: 195 mm
  • Rated Frequency Max: 50 Hz
  • Rated Frequency Min: 50 Hz
  • Release Characteristic: Other
  • Resistance: 43.5 ohms
  • Standard: British Standard
  • Utilization Category: Other
  • Voltage Type: AC
  • With Striker: Yes

Typical Applications

  • Protection of Primary Side Transformers
  • Fuse Switch Combination Units
  • Fuse Bases
  • Fuse Switches

Why Bussmann?

Bussmann fuse-links are built with a silver element and bolt-on cylindrical construction to British Standard requirements, delivering the consistent 25A, 12kV AC performance and 40 kAIC interrupt rating that medium-voltage protection schemes depend on. The integral striker adds a clear, mechanical way to confirm fuse operation, helping electrical professionals maintain safe, code-compliant transformer and switchgear protection.

Manufacturer Resources

Product Specs

Amperage Rating:
25 A
Barrels:
1
Class:
Class back-up
Compliances:
Contact factory
Construction Type:
Bolt-on
Element:
Silver
Fuse Indicator:
With Striker
Fuse Shape:
Cylindrical
Installation Technique:
Air
Interrupt Rating:
40 kAIC
Packaging Type:
Standard
Performance Cat According To Iec 60282 1:
Back-up
Product Height:
64 mm
Product Length Depth:
374 mm
Product Weight:
1833.333333 g
Product Width:
195 mm
Rated Frequency Max:
50 Hz
Rated Frequency Min:
50 Hz
Release Characteristic:
Other
Resistance:
43.5 ohms
Standards:
British Standard
Utilization Category:
Other
Voltage Rating:
12 kV
Voltage Type:
AC
With Striker:
Yes
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
Fuse
Product Details:
Fuse

Bussmann 12BDGHA25 – Frequently Asked Questions

1) What are the barrel dimensions of the Bussmann 12BDGHA25 fuse-link?
The fuse body measures 359 x 50.8 mm, a single barrel cylindrical design with bolt-on end fittings. Check that against the centre distance of your fuse base contacts before ordering, because BS fuse-links come in several standard barrel lengths and a 359 mm body will not bolt into a base cut for a shorter link.
2) Is 40 kAIC enough for my 12 kV switchgear?
The 12BDGHA25 interrupts 40 kA at its 12 kV AC rating. Compare that to the prospective short circuit current at the fuse location on your system study; as long as your calculated fault level at that bus is at or below 40 kA, the fuse-link is within its breaking capacity. It is a 25 A link, so the continuous current rating is the other half of the selection.
3) How do I tell the 12BDGHA25 has operated without pulling it out of the base?
It has an integral striker. When the element clears, the striker fires mechanically, which gives visible indication and can trip the associated switch in a fuse switch combination unit. That is how these are normally arranged for three phase transformer protection, so one blown phase drops the switch rather than leaving the transformer single phased.
4) Can I fit this fuse-link in an SF6 or oil filled switch?
No. The 12BDGHA25 uses an air installation technique, meaning it is built for air insulated fuse bases, fuse switches and combination units. Fuse-links for immersion in oil or for gas filled enclosures are a different construction and should not be substituted with an air type link.
5) Is the 12BDGHA25 a bolt-in or clip-in fuse-link?
Bolt-on. The end fittings are bolted to the fuse base contacts rather than gripped by spring clips, so replacement means isolating, earthing and unbolting both ends. Order the correct hardware from your base manufacturer if the original bolts and washers are damaged or missing, since none are described as supplied with the link.
6) What is the cold resistance of the 12BDGHA25, and why does it matter for commissioning?
The stated resistance is 43.5 ohms. Crews use that figure on a handheld tester to confirm continuity of the silver element before energising a new or replaced link, and to spot a link that has already operated when the striker reading is ambiguous.
7) How heavy is the Bussmann 12BDGHA25 as shipped, and what is the packed size?
Shipping weight is about 1,833 g (roughly 1.83 kg), with packed dimensions of 374 mm length, 195 mm width and 64 mm height in standard packaging. Useful if you are planning a stock holding of spare links on a substation shelf or carrying spares in a service van.
How fast can I get the Bussmann 12BDGHA25 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 12BDGHA25 come with a warranty?
Absolutely. The Bussmann 12BDGHA25 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 12BDGHA25?
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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