Bussmann 25ET BS88 High-Speed ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$212.73
$190.48
Bussmann 25ET Eaton series high speed British standard fuse, high speed, 25 A, AC 690 V, DC 500 V, BS88, 19 x 77 mm, aR, BS

Bussmann 25ET BS88 High-Speed Fuse, 25A aR, 690V AC / 500V DC

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Model: 25ET
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$212.73
$190.48
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Bussmann 25ET BS88 High-Speed Fuse, 25A aR, 690V AC / 500V DC

The Bussmann 25ET is an Eaton Bussmann series high-speed British standard fuse built to BS88 in the compact 19 x 77 mm form factor. Rated 25 A with dual voltage ratings of AC 690 V and DC 500 V, this aR-type fuse is engineered for fast clearing of semiconductor-level fault currents. It carries a 200 kA breaking capacity and is UL Recognized, making it a dependable choice for protecting DC common bus systems, DC drives, power converters/rectifiers, and reduced voltage starters in demanding industrial power circuits.

Key Features

  • Compact BS88 Body: 19 x 77 mm fuse dimensions (Height 20 mm, Width 20 mm, Length/Depth 76 mm) for standard BS88 fuse holders.
  • High-Speed aR Type: British Standard high-speed fuse for rapid interruption of fault currents in semiconductor and converter circuits.
  • Dual Voltage Rating: Rated AC 690 V and DC 500 V (Voltage Type: AC/DC) for use across both AC and DC power circuits.
  • 25 A Current Rating: Sized for 25 A continuous load protection in DC drives, converters, and starter circuits.
  • 200 kA Breaking Capacity: Rated Switching Capacity and Interrupt Rating of 200 kAIC deliver high fault-current interruption.
  • Blade End Connection: Blade end x blade end connection with offset bolted tag fuse shape, secured via stud mounting.
  • I2t Characteristics: Pre-arc I2t of 25 and clearing I2t of 150 for coordinated fast-acting protection.
  • Low Watt Loss: Rated at 7 W watt loss for efficient in-circuit operation.

Certifications & Compliance

  • UL Recognized
  • RoHS Compliant
  • Manufactured to British Standard BS88

Technical Specifications

  • Application: Protection of DC common bus, DC drives, power converters/rectifiers and reduced voltage starters.
  • Breaking Capacity: 200 kA
  • Certifications: UL Recognized
  • Clearing I2t: 150
  • Compliances: RoHS Compliant
  • Connection: Blade end x blade end
  • Fuse Indicator: None
  • Fuse Shape: Offset bolted tags
  • Insulated Metal Gripping Lugs (Imgl): No
  • Interrupt Rating: 200 kAIC
  • Mounting Method: Stud
  • Pre Arc I2t: 25
  • Product Height: 20 mm
  • Product Length Depth: 76 mm
  • Product Weight: 38.4 g
  • Product Width: 20 mm
  • Rated Switching Capacity: 200 kA
  • Utilization Category: Other
  • Voltage Type: AC/DC
  • Watt Losses: 7 W

Typical Applications

  • DC Common Bus Protection
  • DC Drive Systems
  • Power Converters and Rectifiers
  • Reduced Voltage Starters
  • Combined AC/DC Power Distribution

Why Bussmann?

Eaton Bussmann series fuses like the 25ET are built to BS88 for high-speed protection of demanding DC drive, converter, and rectifier circuits. With a 200 kA breaking capacity, UL Recognized status, and RoHS compliance, the 25ET delivers the coordinated, fast-acting protection professional electrical teams rely on.

Manufacturer Resources

Product Specs

Amperage Rating:
25 A
Breaking Capacity:
200 kA
Certifications:
UL Recognized
Clearing I2t:
150
Compliances:
RoHS Compliant
Connection:
Blade end x blade end
Fuse Shape:
Offset bolted tags
Insulated Metal Gripping Lugs Imgl:
No
Interrupt Rating:
200 kAIC
Mounting Method:
Stud
Pre Arc I2t:
25
Product Height:
20 mm
Product Length Depth:
76 mm
Product Weight:
38.4 g
Product Width:
20 mm
Rated Switching Capacity:
200 kA
Utilization Category:
Other
Voltage Rating:
690 V
Voltage Type:
AC/DC
Watt Losses:
7 W
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
Fuse
Product Details:
Fuse

Bussmann 25ET – Frequently Asked Questions

1) Will the Bussmann 25ET fit a standard BS88 19 x 77 mm fuse holder?
Yes. The 25ET is built to BS88 in the 19 x 77 mm body size, with a stated body of 20 mm height, 20 mm width and 76 mm length/depth. It uses offset bolted tags with a blade end x blade end connection and mounts on studs, so the holder or busbar has to be drilled and tapped for bolted tags, not a clip-in cartridge carrier.
2) Can I use the 25ET on a DC bus, or is it AC only?
Both. The 25ET carries dual ratings, AC 690 V and DC 500 V, with the voltage type listed as AC/DC. On a DC common bus or DC drive link, keep the circuit at or under 500 V DC; the 690 V figure applies only on the AC side.
3) What does the aR rating mean and can I use this as a general branch circuit fuse?
No, an aR fuse is not a general-purpose circuit fuse. aR is a semiconductor protection class that only protects against short circuit faults, clearing them fast enough to save diodes, thyristors and IGBTs. It does not give full-range overload protection, so a drive or converter still needs separate overload protection upstream. The 25ET is intended for DC common bus, DC drives, power converters and rectifiers, and reduced voltage starters.
4) What I2t values do I need to coordinate this fuse with my rectifier diodes?
For let-through coordination the 25ET publishes a pre-arc I2t of 25 and a clearing I2t of 150. Compare the clearing figure against the I2t withstand of the semiconductor you are protecting; the device rating must exceed 150 for the fuse to save it in a hard fault.
5) Is 200 kA enough interrupting capacity for my industrial switchgear?
The 25ET is rated 200 kA breaking capacity, listed as 200 kAIC interrupt rating and 200 kA rated switching capacity. That covers available fault current up to 200,000 A at its voltage ratings, which is at the top end of what industrial distribution boards present.
6) Does the Bussmann 25ET have a blown fuse indicator or a microswitch option?
No indicator. The 25ET is supplied without a fuse indicator, so there is nothing to trip a remote microswitch or give a visual flag. If your panel needs blown-fuse annunciation, plan on a separate voltage-sensing relay or choose an indicating version of the fuse.
7) Is the Bussmann 25ET UL Recognized and RoHS compliant for a spec job?
Both. The 25ET is UL Recognized and RoHS compliant, and it is manufactured to British Standard BS88. For submittals, order by manufacturer part number 25ET.
8) How much heat does the 25ET put into an enclosure?
Watt loss is rated at 7 W at the 25 A rating. Multiply by the number of fuses in the panel when you size enclosure ventilation or cooling, since bolted-tag fuses also dump some of that heat into the busbar they are stud-mounted to.
9) Does the 25ET have insulated gripping lugs for hot handling?
It does not. Insulated metal gripping lugs are listed as No on the 25ET, so the fuse is removed by unbolting the offset tags from the studs with the circuit isolated rather than pulled by hand.
How fast can I get the Bussmann 25ET 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 25ET come with a warranty?
Absolutely. The Bussmann 25ET 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 25ET?
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 25ET from ZenSupply?
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