Bussmann 170M4957 High-Speed F...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,412.64
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Bussmann 170M4957 High-Speed Fuse-Link, Class aR, 450A, 1000V AC

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Model: 170M4957

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

$1,412.64
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Bussmann 170M4957 High-Speed Fuse-Link, Class aR, 450A, 1000V AC

The Bussmann 170M4957 is a high-speed Class aR fuse-link engineered for semiconductor protection in demanding power circuits. Rated 450 A at up to 1000 V AC, this Size 1 fuse-link measures 52 x 69 x 74 mm and delivers a 150 kAIC interrupt rating for reliable short-circuit protection. Built to IEC and UL standards with a single blown-fuse indicator, it is designed to safeguard SCRs, diodes, and thyristors used in industrial power conversion equipment.

Key Features

  • Compact Size 1 Footprint: Measures 52 x 69 x 74 mm for space-efficient mounting in high-speed fuse holders and blocks.
  • 450A / 1000V AC Rating: Rated for 450 A continuous current at up to 1000 V AC, suited to demanding power conversion circuits.
  • Class aR High-Speed Design: Utilization category aR (accompanied semiconductor protection) provides fast-acting overcurrent protection engineered specifically for power semiconductors.
  • 150 kAIC Interrupt Rating: High interrupting capacity of 150 kAIC ensures dependable performance under high-fault-current conditions.
  • Single Blown-Fuse Indicator: Integrated indicator gives a clear visual signal when the fuse has operated, speeding up troubleshooting and replacement.
  • Square Body, Flush End Contacts: Square-body fuse-link with flush end contacts for a secure, low-resistance connection in the fuse block.
  • Semiconductor Protection: Purpose-built to protect SCRs, diodes, thyristors, and other power semiconductors from destructive fault currents.

Certifications & Compliance

  • IEC 60269-4 Compliant
  • UL Listed
  • CE Compliant

Technical Specifications

  • Application: Semiconductor protection
  • Certifications: IEC 60269-4
  • Class: Class aR
  • Compliances: CE
  • Fuse Indicator: Other
  • Fuse Shape: Square body, flush end contacts
  • Insulated Metal Gripping Lugs (IMGL): No
  • Interrupt Rating: 150 kAIC
  • Packaging Type: Standard
  • Product Height: 52 mm
  • Product Length Depth: 73 mm
  • Product Weight: 576 g
  • Product Width: 170 mm
  • Utilization Category: aR (accompanied semiconductor protection)
  • Voltage Type: AC

Typical Applications

  • Power Semiconductor Protection (SCRs, Diodes, Thyristors)
  • Variable Frequency Drives and Motor Controls
  • Industrial Power Conversion Equipment
  • High-Speed Fuse Blocks and Disconnects
  • AC and DC Power Distribution Systems

Why Bussmann?

Bussmann engineers high-speed fuse-links like the 170M4957 to deliver dependable Class aR semiconductor protection, backed by IEC 60269-4 compliance and UL listing. With a 150 kAIC interrupt rating and a rugged square-body, flush-contact design, this fuse-link is built for code-compliant, reliable performance in demanding industrial power applications.

Manufacturer Resources

Product Specs

Amperage Rating:
450 A
Application:
semiconductor protection
Certifications:
IEC 60269-4
Class:
Class aR
Compliances:
CE
Fuse Indicator:
Other
Fuse Shape:
Square body, flush end contacts
Insulated Metal Gripping Lugs Imgl:
No
Interrupt Rating:
150 kAIC
Packaging Type:
Standard
Product Height:
52 mm
Product Length Depth:
73 mm
Product Weight:
576 g
Product Width:
170 mm
Utilization Category:
aR (accompanied semiconductor protection)
Voltage Rating:
1000 V
Voltage Type:
AC
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
Fuse
Product Details:
Fuse

Bussmann 170M4957 – Frequently Asked Questions

How fast can I get the Bussmann 170M4957 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 170M4957 come with a warranty?
Absolutely. The Bussmann 170M4957 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 170M4957?
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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