Bussmann 170M7398 NH2 High-Spe...
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Bussmann 170M7398 NH2 High-Speed Fuse-Link, 200A 800V AC, gR

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Model: 170M7398

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

$1,812.89
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Bussmann 170M7398 NH2 High-Speed Fuse-Link, 200A 800V AC, gR

The Bussmann 170M7398 is a high-speed fuse-link engineered for demanding semiconductor protection applications, rated 200A at AC 800V in the NH2 size format (150 x 61 x 54 mm). Built to gR utilization category and IEC standards, this fuse-link delivers a 65 kA breaking capacity with a dual/combination fuse status indicator for quick visual confirmation of fuse condition. It is UL Recognized and CE Marked for use across professional electrical installations.

Key Features

  • Size & Dimensions: NH2 fuse size measuring 150 x 61 x 54 mm for standard NH2 fuse holders and switch-disconnectors.
  • Amperage Rating: 200A rated current for reliable overcurrent protection.
  • Voltage Rating: AC 800V rating supports high-voltage AC power distribution circuits.
  • High-Speed gR Class: gR utilization category provides general purpose semiconductor protection with fast clearing response.
  • Breaking Capacity: 65 kA breaking capacity (65 kAIC interrupt rating, 65 kA rated switching capacity) for demanding fault-current conditions.
  • Dual Fuse Indicator: Combination fuse status indicator allows quick visual confirmation of fuse condition without de-energizing the circuit.
  • I2t Characteristics: Pre-arc I2t of 9500 and clearing I2t of 76000 for coordinated protection engineering.
  • Watt Losses: Rated at 32W for thermal design calculations.

Certifications & Compliance

  • UL Recognized
  • CE Marked

Technical Specifications

  • Breaking Capacity: 65 kA
  • Certifications: UL Recognized
  • Class: Class gR
  • Clearing I2t: 76000
  • Compliances: CE Marked
  • Fuse Indicator: Combination fuse status indicator
  • Fuse Size: NH2
  • Insulated Metal Gripping Lugs (Imgl): No
  • Interrupt Rating: 65 kAIC
  • Pre Arc I2t: 9500
  • Product Height: 150 mm
  • Product Length Depth: 61 mm
  • Product Weight: 733.3333333 g
  • Product Width: 53.9 mm
  • Rated Switching Capacity: 65 kA
  • Utilization Category: gR (general purpose semiconductor protection)
  • Voltage Type: AC
  • Watt Losses: 32 W

Typical Applications

  • Semiconductor Device Protection
  • AC Power Distribution Circuits
  • Industrial Motor Drives and Rectifiers
  • Power Conversion Equipment
  • Commercial and Industrial Electrical Panels

Why Bussmann?

Bussmann fuse-links like the 170M7398 are built to IEC standards with UL Recognized and CE Marked compliance, giving electrical professionals confidence in high-speed semiconductor protection. With a 65 kA breaking capacity, defined I2t characteristics, and a dual fuse status indicator, this NH2 fuse-link supports reliable, code-compliant performance in demanding AC power applications.

Manufacturer Resources

Product Specs

Amperage Rating:
200 A
Breaking Capacity:
65 kA
Certifications:
UL Recognized
Class:
Class gR
Clearing I2t:
76000
Compliances:
CE Marked
Fuse Indicator:
Combination fuse status indicator
Fuse Size:
NH2
Insulated Metal Gripping Lugs Imgl:
No
Interrupt Rating:
65 kAIC
Pre Arc I2t:
9500
Product Height:
150 mm
Product Length Depth:
61 mm
Product Weight:
733.3333333 g
Product Width:
53.9 mm
Rated Switching Capacity:
65 kA
Utilization Category:
gR (general purpose semiconductor protection)
Voltage Rating:
800 V
Voltage Type:
AC
Watt Losses:
32 W
Department:
Electrical
Product Type:
Fuse
Product Group:
Fuses
Product Subgroup:
Other Fuses

Bussmann 170M7398 – Frequently Asked Questions

1) Will a Bussmann 170M7398 fit a standard NH2 fuse holder or switch-disconnector?
Yes. The 170M7398 is built in the NH2 body size, 150 mm x 61 mm x 53.9 mm, so it drops into NH2-rated fuse bases and NH2 switch-disconnectors. It does not have insulated metal gripping lugs, so use an NH fuse puller rated for the job when pulling it live-adjacent. It weighs about 733 g, which matters if you are mounting into a panel with a light DIN rail assembly.
2) What is the difference between a gR and an aR high-speed fuse, and which one is the 170M7398?
The 170M7398 is a gR fuse. gR is full-range: it clears both overloads and short circuits, so it can be the only protective device on the branch. aR is partial-range and only handles short circuits, which means it has to be backed up by a separate overload device such as a breaker or drive electronics. If your drawing calls for standalone semiconductor protection with no upstream overload device, gR is the one you want.
3) Can I use the Bussmann 170M7398 on a 480V or 600V AC system?
Yes. The 800V AC rating is a maximum, so applying it at 480V or 600V is fine. What you cannot do is use it above 800V AC, and the rating is AC only, so do not apply it on a DC link or DC bus without a fuse carrying a published DC rating.
4) Is 65 kA enough interrupting capacity for my service, and how do I check?
The 170M7398 carries a 65 kAIC interrupting rating with a 65 kA breaking and rated switching capacity. Compare that against the available fault current at the point of installation from your short-circuit study, not against the transformer nameplate. If the calculated available fault current at that bus exceeds 65 kA, this fuse is not the right device for that location.
5) What I2t values do I use to coordinate this fuse with my SCRs or diodes?
Use 9500 A2s pre-arc and 76000 A2s total clearing for the 170M7398. The rule is straightforward: the semiconductor's own I2t withstand rating must exceed the fuse's total clearing I2t at your system voltage, or the device fails before the fuse does. The pre-arc figure is what you use when coordinating this fuse against another fuse in series.
6) Can I drop a standard NH2 gG class fuse into the same holder instead of the 170M7398?
Mechanically it will fit the NH2 base, but it is not an equivalent protection device. A gG general-purpose fuse is designed for cable and distribution protection and clears far too slowly to save a diode or SCR. The 170M7398 is a gR high-speed semiconductor fuse with a 9500 A2s pre-arc I2t chosen specifically to open ahead of the device. If the original circuit was fused with a high-speed link, replace it with a high-speed link.
7) How much heat does this 200A fuse put into the enclosure?
Figure 32 W per fuse at rated current. On a three-phase set that is roughly 96 W of added heat load inside the cabinet, which you add to your drive and transformer losses when sizing enclosure ventilation or an air conditioner. High-speed fuses also derate in still, hot air, so if the panel runs warm you want margin above the 200 A rating rather than sizing right at the load current.
8) Can maintenance tell if this fuse has blown without shutting the equipment down?
Yes. The 170M7398 has a combination (dual) fuse status indicator, so a tech can confirm the fuse condition visually through the holder window without de-energizing or pulling the fuse. The combination style also allows a microswitch to be fitted against the striker for remote trip signalling, which is how most drive panels get an alarm contact back to the PLC.
9) Is the Bussmann 170M7398 UL Listed for use in a US panel?
It is UL Recognized and CE Marked, not UL Listed. Recognized means it is approved as a component for use inside listed equipment such as a drive, rectifier cabinet or motor controller, evaluated in that assembly, rather than as a standalone field-installed device. For an AHJ-inspected branch circuit device you would need a UL Listed fuse instead.
10) What kind of equipment does this 200A high-speed fuse normally go into?
It shows up where power semiconductors need protecting: variable frequency drives, rectifier and converter stacks, soft starters, UPS systems, and DC power supplies fed from an 800 V or lower AC source. The 200 A rating and NH2 body put it in mid-size industrial drive and power conversion gear rather than small control panels.
How fast can I get the Bussmann 170M7398 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 170M7398 come with a warranty?
Absolutely. The Bussmann 170M7398 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 170M7398?
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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