Bussmann 170M-204 High-Speed a...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$6,004.90
Bussmann 170M-204 High-Speed aR Fuse-Link, 2000V DC

Bussmann 170M-204 High-Speed aR Fuse-Link, 2000V DC

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Model: 170M2045

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

$6,004.90
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Bussmann 170M-204 High-Speed aR Fuse-Link, 2000V DC

The Bussmann 170M-204 is a high-speed aR fuse-link engineered for demanding DC power protection, available in ratings from 80A to 600A to match a range of third-rail and traction power applications. Rated 2000V DC and built to IEC standards, this fuse-link uses Class aR (accompanied semiconductor protection) utilization for protecting power semiconductors, and includes a built-in indicator for fast visual status checks. For example, the 600A rating measures 65 x 164 x 216 mm, illustrating the compact, bolt-in form factor used across the family. Backed by a 100 kAIC interrupt rating, this fuse-link is designed for protection of DC third rail applications up to 2000 Vdc.

Key Features

  • Amp Rating Range: Available from 80A to 600A to suit varying DC third-rail and traction power protection needs.
  • Voltage Rating: 2000V DC for high-voltage third-rail and traction power distribution systems.
  • High-Speed aR Design: Class aR (accompanied semiconductor protection) utilization category protects power semiconductors from short-circuit currents.
  • Compact Form Factor: The 600A rating measures 65 x 164 x 216 mm, suited to space-constrained enclosure and switchgear installations.
  • Interrupt Rating: 100 kAIC interrupt rating delivers reliable fault-current interruption in demanding DC power systems.
  • Built-In Indicator: Integrated fuse indicator provides fast visual confirmation of fuse status without additional test equipment.
  • IEC Compliant: Manufactured to IEC standards for traction and third-rail protection applications worldwide.

Certifications & Compliance

  • IEC Rated

Technical Specifications

  • Class: Class aR
  • Utilization Category: aR (accompanied semiconductor protection)
  • Packaging Type: Standard
  • Interrupt Rating: 100 kAIC
  • Used With: Protection of DC third rail applications up to 2000 Vdc
  • Application: traction | third rail
  • Compliances: Not Applicable
  • Certifications: IEC Rated
  • Fuse Indicator: Other
  • Voltage Rating: 2000V

Typical Applications

  • DC Third-Rail Traction Power Protection
  • Semiconductor and Rectifier Protection
  • Rail Transit and Mass Transit Power Systems
  • High-Voltage DC Switchgear and Enclosures
  • Industrial DC Power Distribution

Why Bussmann?

Bussmann fuse-links are engineered for the demanding reliability requirements of traction and third-rail power systems, combining high-speed Class aR semiconductor protection with a 100 kAIC interrupt rating and IEC-standard construction. With ratings spanning 80A to 600A and a built-in indicator for fast status checks, the Bussmann 170M-204 fuse-link delivers dependable, code-compliant protection for critical DC power infrastructure. Choose Bussmann for consistent quality and performance across your electrical protection systems.

Manufacturer Resources

Product Specs

Product Group:
Fuses
Class:
Class aR
Utilization Category:
aR (accompanied semiconductor protection)
Packaging Type:
Standard
Product Type:
Fuse-Link
Interrupt Rating:
100 kAIC
Product Details:
Fuse
Used With:
Protection of DC third rail applications up to 2000 Vdc
Application:
traction | third rail
Product Subgroup:
Other Fuses
Compliances:
Not Applicable
Department:
Electrical
Certifications:
IEC Rated
Fuse Indicator:
Other
Voltage Rating:
2000V
Amperage Rating:
80A - 600A
Standards:
IEC

Bussmann 170M2045 – Frequently Asked Questions

1) Will the Bussmann 170M-204 fuse-link work on a 2000V DC third rail circuit?
That is exactly what it is built for. The 170M-204 high-speed fuse-link is rated 2000V DC and is specified for protection of DC third rail applications up to 2000 Vdc, in traction and third rail power systems. Do not apply it above 2000 Vdc.
2) What amp ratings does the Bussmann 170M-204 fuse-link come in?
The 170M-204 family spans 80A to 600A. Two ratings are stocked as orderable parts: 80A as MPN 170M2052 and 600A as MPN 170M2045. Specify the amp rating on the order, since the part number changes with it.
3) Is a Class aR fuse the right choice, or do I need an aM or gR type?
Class aR is a partial-range semiconductor protection fuse: its utilization category is aR, accompanied semiconductor protection, meaning it clears short-circuit faults ahead of rectifiers, thyristors and IGBTs but is not intended to be the sole overload device. If you need a fuse that also handles low-level overload on its own, a full-range gR/gS type is the one to look at. For motor-circuit back-up duty, aM is the different animal. The 170M-204 is the semiconductor short-circuit fuse.
4) What fault current can the 170M-204 fuse-link interrupt?
100 kAIC. That covers the available fault current on most traction substation and DC switchgear bus arrangements, but confirm your calculated available fault current at the fuse location does not exceed 100 kA before you commit to it.
5) Can I tell if a 170M-204 fuse has blown without pulling it or using a meter?
Yes, there is a built-in indicator on the fuse-link, so a maintenance tech can confirm status visually during a walkthrough of the switchgear instead of de-energizing and testing each fuse. Useful on transit substations where fuse banks are inspected on a route.
6) What standard is the Bussmann 170M-204 built to, and is it UL listed?
It is built and rated to IEC standards, and the certification carried on it is IEC Rated. Specify accordingly if your project drawing calls out an IEC-referenced semiconductor fuse for traction power.
7) How much room do I need in the enclosure for the 600A 170M-204 fuse?
The 600A rating measures 65 x 164 x 216 mm. It is a bolt-in body rather than a clip-mount cartridge, so plan for the bus stab pattern and the indicator to stay visible through the cubicle door or viewing window.
8) Can I use this fuse to protect rectifiers and thyristor stacks, not just third rail?
Yes. The aR utilization category is specifically for accompanied semiconductor protection, so it is applied ahead of rectifiers and other power semiconductors as well as on DC third rail feeds. Typical placement is in traction substation rectifier and DC distribution gear rated up to 2000 Vdc.
9) How does the Bussmann 170M-204 ship, individually or in a multi-pack?
Standard packaging, sold by the individual fuse-link against the MPN for the amp rating you pick, for example 170M2045 for the 600A. There is no bundled multi-pack configuration on the part number.
How fast can I get the Bussmann 170M2045 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 170M2045 come with a warranty?
Absolutely. The Bussmann 170M2045 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 170M2045?
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 170M2045 from ZenSupply?
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