Bussmann 170E3844 Eaton Series...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$738.53
Bussmann 170E3844 Eaton Series High-Speed Square Body Fuse, 63A Class aR

Bussmann 170E3844 Eaton Series High-Speed Square Body Fuse, 63A Class aR

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Model: 170E3844

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

$738.53
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Bussmann 170E3844 Eaton Series High-Speed Square Body Fuse, 63A Class aR

The Bussmann 170E3844 is an Eaton series high-speed square body fuse rated 63A and 900V AC, purpose-built for semiconductor protection under Utilization Category aR (accompanied semiconductor protection). It features a top-mounted fuse status indicator and a square body with slotted offset bolted tags, delivering fast-acting, code-compliant protection for demanding industrial power electronics circuits and drive systems where sensitive semiconductor devices must be safeguarded from damaging overcurrent conditions.

Key Features

  • Amperage Rating: Rated 63A for dependable overcurrent protection in semiconductor circuits.
  • Voltage Rating: Rated 900V AC to support higher-voltage industrial power electronics applications.
  • Fuse Shape: Square body construction with slotted offset bolted tags for a secure, low-resistance connection.
  • Status Indicator: Top-mounted fuse status indicator provides quick visual confirmation of fuse condition without de-energizing equipment.
  • Utilization Category: Class aR (accompanied semiconductor protection) rated for use alongside an upstream protective device.
  • Application: Engineered specifically for semiconductor protection in power electronics and drive systems.

Technical Specifications

  • Amperage Rating: 63 A
  • Application: semiconductor protection
  • Compliances: Contact factory
  • Fuse Shape: Square body, slotted offset bolted tags
  • Insulated Metal Gripping Lugs (IMGL): No
  • Packaging Type: Standard
  • Product Height: 66 mm
  • Product Length Depth: 233 mm
  • Product Weight: 244.5 g
  • Product Width: 140 mm
  • Utilization Category: aR (accompanied semiconductor protection)
  • Voltage Rating: 900 V
  • Voltage Type: AC

Typical Applications

  • Semiconductor Protection Circuits
  • Power Electronics and Converter Systems
  • Industrial High-Speed Fuse Protection
  • Class aR Accompanied Protection Applications
  • Motor Drive and Rectifier Circuit Safeguarding

Why Bussmann?

Bussmann by Eaton is a recognized name in circuit protection, and the 170E3844 continues that standard with a square body, slotted offset bolted-tag design built for demanding semiconductor protection duty. The top-mounted fuse status indicator gives technicians a fast, reliable way to confirm fuse condition, while the Class aR utilization category and 900V AC / 63A rating support dependable, code-compliant performance in accompanied semiconductor protection applications across industrial power electronics systems.

Manufacturer Resources

Product Specs

Amperage Rating:
63 A
Application:
semiconductor protection
Class:
Class aR
Compliances:
Contact factory
Fuse Indicator:
Top fuse status indicator
Fuse Shape:
Square body, slotted offset bolted tags
Insulated Metal Gripping Lugs Imgl:
No
Packaging Type:
Standard
Product Height:
66 mm
Product Length Depth:
233 mm
Product Weight:
244.5 g
Product Width:
140 mm
Utilization Category:
aR (accompanied semiconductor protection)
Voltage Rating:
900 V
Voltage Type:
AC
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
Fuse
Product Details:
Fuse

Bussmann 170E3844 – Frequently Asked Questions

1) Can the Bussmann 170E3844 fuse be used as the only overcurrent protection on a drive circuit?
No. The 170E3844 is a Class aR fuse, utilization category aR meaning accompanied semiconductor protection. It only interrupts short-circuit level faults and must sit downstream or alongside an upstream device that handles overload protection. If you need a fuse that covers both overload and short circuit on its own, you want a gR/gS type instead, not this one.
2) Will a 900V AC fuse like the Bussmann 170E3844 work on a 690V drive?
Yes. The 170E3844 is rated 900 V AC, so it can be applied at any system voltage up to that figure, including 690 V industrial drives and rectifier circuits. The rating is AC only, so do not apply it to a DC bus on the strength of this number.
3) What mounting does the 170E3844 square body fuse need in the holder?
It's a square body fuse with slotted offset bolted tags, so it bolts into the busbar or fuse base rather than clipping into a holder. The slots give you a little tolerance on hole centers, but you need a bolted base sized for a square body link, not a cylindrical fuse clip.
4) Is the Bussmann 170E3844 the right fuse to protect IGBTs and thyristors?
Yes, that's what it's built for. It's a high-speed semiconductor protection fuse, rated 63 A at 900 V AC, intended for power electronics, converters, rectifier circuits and motor drives where the silicon will fail before a standard industrial fuse clears. A general-purpose Class J or CC fuse is too slow for that duty.
5) How do I tell if a Bussmann 170E3844 has blown without shutting the panel down?
This fuse carries a top-mounted status indicator, so a technician can confirm the element has operated visually from above the fuse while the equipment stays energized. Useful on multi-fuse rectifier banks where tracing a fault by meter means downtime.
6) What are the dimensions and weight of the Bussmann 170E3844 fuse?
The 170E3844 measures 233 mm length/depth, 140 mm wide and 66 mm high, and weighs 244.5 g. Check those against the clearance in your fuse base and enclosure before you order, since square body links vary a lot in body size between amp ratings.
7) Does the 170E3844 come with insulated metal gripping lugs for safer handling?
No, this version is supplied without IMGL. Pulling or setting the fuse means working on the bolted tags directly, so plan for a de-energized, locked-out change-out. If your maintenance procedure calls for gripping lugs, you need a different variant of the square body link.
8) What part number do I quote to reorder this Bussmann semiconductor fuse?
Order it as Bussmann 170E3844. That's the Eaton manufacturer part number for the 63 A, 900 V AC Class aR square body link, and it's the only model on the item, so there are no finish or option suffixes to specify.
9) Does the 170E3844 ship in bulk or single packs?
Packaging on the 170E3844 is standard, meaning individual commercial packaging rather than a bulk or tray configuration. For an MRO spares crib stocking multiple drive cabinets, order the quantity you need as individual pieces.
How fast can I get the Bussmann 170E3844 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 170E3844 come with a warranty?
Absolutely. The Bussmann 170E3844 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 170E3844?
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 170E3844 from ZenSupply?
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