Bussmann 170M3710 63A Class aR...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$745.21
Bussmann 170M3710 High Speed Fuse

Bussmann 170M3710 63A Class aR High Speed Fuse

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Model: 170M3710
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Bussmann 170M3710 63A Class aR High Speed Fuse

The Bussmann 170M3710 is a 63A Class aR high speed fuse engineered for demanding DC power protection, including DC common bus systems, DC drives, and power converters/rectifiers. Rated 1000 Vac with a 200 kAIC interrupt rating, this square body fuse uses a blade end X blade end connection for secure installation in high-performance electrical equipment. Backed by UL Recognized and IEC Rated performance, the 170M3710 delivers fast, dependable overcurrent protection for sensitive semiconductor and drive components.

Key Features

  • Amperage Rating: 63A RMS for precise overcurrent protection in DC power circuits.
  • Voltage Rating: 1000 Vac for use in high-voltage DC drive and converter systems.
  • Interrupt Rating: 200 kAIC interrupt rating for high fault-current capability in industrial applications.
  • Fuse Class: Class aR high speed design for fast-acting semiconductor protection.
  • Connection Type: Blade end X blade end connection for secure mounting in fuse blocks and holders.
  • Application: Suited for DC common bus, DC drives, and power converters/rectifiers.
  • Fuse Indicator: Non Indicating design.
  • Watt Losses: 14W rated watt loss for efficient thermal performance.

Certifications & Compliance

  • RoHS Compliant
  • CE Marked
  • UL Recognized
  • IEC Rated

Technical Specifications

  • Amperage Rating: 63A
  • Application: DC common bus, DC drives, power converters/rectifiers
  • Class: Class aR
  • Clearing I2t: Clearing at 660V: 770
  • Connection: Blade end X blade end
  • Current Rating: 63A RMS
  • Fuse Indicator: Non Indicating
  • Interrupt Rating: 200 kAIC
  • Packaging Type: Standard
  • Pre Arc I2t: 115
  • Voltage Rating: 1000 Vac
  • Watt Losses: 14W
  • Product Type: Square body, US style -FU/115 without indicator
  • Product Length: 5.433 IN
  • Product Details: Square body, US style -FU/115 without indicator
  • Product Height: 2.087 IN
  • Product Weight: 1.6456 LB
  • Product Width: .315 IN

Typical Applications

  • DC Common Bus Systems
  • DC Drives
  • Power Converters and Rectifiers
  • Industrial Motor Drive Protection
  • Semiconductor Equipment Protection

Why Bussmann?

Bussmann fuses are engineered for reliable, code-compliant performance in demanding industrial and commercial electrical systems. The 170M3710 combines rugged square body construction with high speed Class aR fusing characteristics, a 200 kAIC interrupt rating, and UL Recognized, IEC Rated, RoHS Compliant, and CE Marked compliance for globally deployed DC power equipment. For professionals specifying overcurrent protection for DC drives, converters, and rectifiers, the Bussmann 170M3710 delivers dependable, standards-backed protection.

Manufacturer Resources

Product Specs

Amperage Rating:
63A
Application:
DC common bus, DC drives, power converters/rectifiers
Class:
Class aR
Clearing I2t:
Clearing at 660V: 770
Connection:
Blade end X blade end
Current Rating:
63A RMS
Fuse Indicator:
Non Indicating
Interrupt Rating:
200 kAIC
Packaging Type:
Standard
Pre Arc I2t:
115
Voltage Rating:
1000 Vac
Watt Losses:
14W
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
Fuse
Product Length:
5.433 IN
Product Details:
Square body, US style -FU/115 without indicator
Product Height:
2.087 IN
Product Weight:
1.6456 LB
Product Width:
.315 IN

Bussmann 170M3710 – Frequently Asked Questions

1) Can I use a Class aR fuse like the 170M3710 for branch circuit or feeder protection?
No. Class aR is a partial-range semiconductor protection fuse, built to clear short circuits ahead of diodes, SCRs and IGBTs. It is not a branch circuit fuse and should not be used as overload protection for general feeders or motor branch circuits. Use it where the equipment manufacturer calls for a high speed semiconductor fuse, such as DC common bus, DC drives, and power converters/rectifiers, and let a separate device handle overload.
2) Is the Bussmann 170M3710 rated for DC circuits even though it lists 1000 Vac?
The published rating on the 170M3710 is 1000 Vac with a 200 kAIC interrupt rating, and its stated applications are DC common bus systems, DC drives, and power converters/rectifiers. AC and DC ratings on high speed fuses are not the same number, so size the DC application against the manufacturer's DC voltage curve for the 170M series rather than assuming 1000 V carries over.
3) What I2t values do I use to coordinate the 170M3710 with my SCR or diode?
Pre-arcing (melting) I2t is 115 A2s, and clearing I2t at 660 V is 770 A2s. Compare the clearing figure against the I2t withstand rating of the semiconductor you are protecting; the device rating has to exceed 770 A2s at that voltage for the fuse to protect it. Clearing I2t rises with applied voltage, so check the correction factor if you are running above 660 V.
4) What is the difference between a Class aR fuse and a Class gR or gS semiconductor fuse?
aR is partial range: it clears short circuits only, so the drive or its controls must handle overload. gR and gS are full range, covering both overload and short circuit. The 170M3710 is aR, so it belongs in a design where overload protection already exists elsewhere, which is how most DC drives and rectifier stacks are built.
5) How much heat does the 170M3710 put into my drive cabinet?
Rated watt loss is 14 W at full 63 A RMS load. That is heat you have to account for in the enclosure thermal calculation, especially if several fuses sit on the same bus in a closed cabinet. Running below rated current drops the loss, since dissipation follows the square of the current.
6) Does the 170M3710 have a blown fuse indicator or microswitch option?
No. The 170M3710 is the non-indicating version, built without an indicator pin, so there is no striker to trip a microswitch for remote blown-fuse signalling. If your panel relies on fuse monitoring contacts, you need an indicating variant of the 170M series instead.
7) Is a 63A high speed fuse enough for a 63A drive?
Not necessarily. The 63 A RMS rating on the 170M3710 is the continuous current the fuse carries, but semiconductor fuse sizing is driven by the RMS current through the individual leg of the converter, harmonic content, and ambient temperature, not by the drive nameplate. On a three-phase bridge the per-leg current is well below the DC output. Size from the drive manufacturer's recommended fuse table.
8) Is the Bussmann 170M3710 acceptable for equipment shipped into Europe?
Yes. The 170M3710 carries UL Recognized and IEC ratings, is CE marked, and is RoHS compliant, which covers both North American OEM builds and European deployment. Note UL Recognized is a component listing, meaning it is approved for use inside listed equipment rather than as a standalone listed device.
9) What is the exact part number and weight for the Bussmann 63A square body high speed fuse?
Order by manufacturer part number 170M3710. Each fuse weighs 1.6456 lb, which matters if you are stocking a spares kit or figuring freight on a multi-unit order. It ships in standard packaging.
How fast can I get the Bussmann 170M3710 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 170M3710 come with a warranty?
Absolutely. The Bussmann 170M3710 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 170M3710?
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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