Bussmann 170M3767 Eaton Series...
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Bussmann 170M3767 Eaton Series High-Speed Square Body Fuse, 315A, Class aR

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Model: 170M3767

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

$951.71
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Bussmann 170M3767 Eaton Series High-Speed Square Body Fuse, 315A, Class aR

The Bussmann 170M3767 is an Eaton series high-speed square body fuse engineered for semiconductor protection applications, rated 700V (UL) and 690V (IEC) with a 315A amperage rating and a 200 kAIC interrupt rating. Built in a square body, center-bolted-tag configuration with blade end x blade end termination, this Class aR (accompanied semiconductor protection) fuse is UL Recognized and CE Marked for demanding power electronics circuits. Its high-speed clearing characteristics help safeguard sensitive semiconductor devices from short-circuit and overcurrent conditions in industrial power systems.

Key Features

  • Voltage Rating: 700V (UL) and 690V (IEC) for reliable performance across international power systems.
  • Amperage Rating: 315A rated for high-speed overcurrent protection.
  • Interrupt Rating: 200 kAIC for dependable fault clearing in high-energy circuits.
  • Utilization Category: Class aR (accompanied semiconductor protection) for use alongside semiconductor devices.
  • Fuse Shape: Square body with center-bolted tags and blade end x blade end termination for secure mounting.
  • Clearing I2t: 46,500 A2s at 660V; Pre-Arc I2t of 7,000 A2s for fast, predictable clearing.
  • Watt Loss: 50W typical power dissipation.
  • Voltage Type: AC rated fuse.

Certifications & Compliance

  • UL Recognized
  • CE Marked

Technical Specifications

  • Amperage Rating: 315 A
  • Application: semiconductor protection
  • Certifications: UL Recognized
  • Clearing I2t: 46500 at 660 V
  • Compliances: CE Marked
  • Fuse Shape: Square body, center bolted tags
  • Insulated Metal Gripping Lugs (IMGL): No
  • Packaging Type: Standard
  • Pre Arc I2t: 7000
  • Product Height: 60 mm
  • Product Length Depth: 92 mm
  • Product Weight: 176 g
  • Product Width: 163 mm
  • Utilization Category: aR (accompanied semiconductor protection)
  • Voltage Rating: 690 V
  • Voltage Type: AC
  • Watt Losses: 50 W

Typical Applications

  • Semiconductor Protection Circuits
  • Power Electronics and Variable Frequency Drives
  • Industrial Motor Control Panels
  • High-Speed Overcurrent Protection Systems
  • Switchgear and Power Distribution Equipment

Why Bussmann?

Bussmann by Eaton is a recognized leader in circuit protection, and the 170M3767 reflects that standard with UL Recognized and CE Marked compliance backing its 700V (UL)/690V (IEC), 315A, 200 kAIC rating. Its Class aR construction and square body, center-bolted-tag design deliver the fast, reliable clearing performance professionals depend on for semiconductor protection in demanding industrial power applications.

Manufacturer Resources

Product Specs

Amperage Rating:
315 A
Application:
semiconductor protection
Certifications:
UL Recognized
Class:
Class aR
Clearing I2t:
46500 at 660 V
Compliances:
CE Marked
Connection:
Blade end x blade end
Fuse Indicator:
Other
Fuse Shape:
Square body, center bolted tags
Insulated Metal Gripping Lugs Imgl:
No
Interrupt Rating:
200 kAIC
Packaging Type:
Standard
Pre Arc I2t:
7000
Product Height:
60 mm
Product Length Depth:
92 mm
Product Weight:
176 g
Product Width:
163 mm
Utilization Category:
aR (accompanied semiconductor protection)
Voltage Rating:
690 V
Voltage Type:
AC
Watt Losses:
50 W
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
Fuse
Product Details:
Fuse

Bussmann 170M3767 – Frequently Asked Questions

1) Can I use a Bussmann 170M3767 fuse on a 690V drive?
Yes. The 170M3767 is an AC-rated square body fuse carrying 700V under UL and 690V under IEC, so it suits 690V European-spec drives and 600V class North American gear alike. Interrupting rating is 200 kAIC, which covers high-energy industrial supplies.
2) Will a Class aR fuse protect my drive on its own, or do I still need a breaker?
Class aR is accompanied semiconductor protection, meaning the 170M3767 handles short-circuit clearing only. It is not a full-range fuse, so it will not clear low-level overloads. You still need overload protection upstream or in the drive itself. If you want a fuse that covers both overload and short circuit, you need a gR or gS full-range type instead.
3) What are the mounting dimensions of the Bussmann 170M3767 square body fuse?
The body measures 163 x 92 x 60 mm and weighs 176 g. It is a square body with center-bolted tags and a blade end x blade end termination, so it bolts down to flat bus pads or a fuse base rather than clipping into a holder. Match the tag bolt centers to your existing base before ordering.
4) How do I check that this 315A high-speed fuse will actually protect my SCR or diode?
Compare the fuse let-through against the device rating. The 170M3767 has a clearing I2t of 46,500 A2s at 660V and a pre-arc I2t of 7,000 A2s. Your semiconductor's I2t withstand must be higher than the fuse clearing value at your operating voltage. Continuous rating is 315A.
5) Can I substitute a standard Class J or Class RK5 fuse for this 315A semiconductor fuse?
No. The 170M3767 is a high-speed aR fuse for semiconductor protection, and its let-through energy is far lower than a general-purpose branch circuit fuse of the same ampere rating. A Class J or RK5 will clear too slowly and the diodes, SCRs or IGBTs fail before the fuse does. Replace a high-speed square body fuse with another high-speed square body fuse of matching voltage, amperage and body dimensions.
6) How much heat does the Bussmann 170M3767 put into the enclosure?
Typical watt loss is 50 W per fuse at rated current. On a three-phase set that's 150 W to account for in your panel thermal calculation, and it's a reason to allow airflow around the bolted tags rather than burying the fuse behind other components.
7) Is the Bussmann 170M3767 approved for export panels going to Europe?
It is CE Marked and UL Recognized, with dual UL and IEC voltage ratings, so it fits panels built for either market. UL Recognized means it is a component approval, judged as part of the end assembly rather than standing alone as a listed device.
8) Does this Bussmann fuse have a microswitch or blown-fuse indicator?
The 170M3767 is not supplied with insulated metal gripping lugs, and its indicator type is listed as other rather than a standard striker pin arrangement. If your panel relies on a microswitch-actuated striker for fuse monitoring, verify the indicator arrangement matches the detector you have fitted.
9) What is the exact part number to order for this 700V 315A Bussmann square body fuse?
Order Bussmann by Eaton 170M3767. It ships in standard packaging as a single square body fuse, 315A, 690V IEC, Class aR.
How fast can I get the Bussmann 170M3767 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 170M3767 come with a warranty?
Absolutely. The Bussmann 170M3767 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 170M3767?
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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