Bussmann LPN-RK Low-Peak Class...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$57.61
Bussmann LPN-RK Low-Peak Class RK1 Time-Delay Fuse

Bussmann LPN-RK Low-Peak Class RK1 Time-Delay Fuse

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Model: LPN-RK-15/100SP

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

$57.61
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Bussmann LPN-RK-5-6/10SP Low Peak Class RK1 Time-Delay Fuse

The Bussmann LPN-RK-5-6/10SP is a Low Peak Class RK1 dual-element, time-delay fuse rated 5-6/10A, engineered to deliver dependable current-limiting overcurrent protection in demanding electrical distribution equipment. Rated 250 Vac, 125 Vdc with an interrupt rating of 300 kAIC at 250 Vac and 100 kAIC at 125 Vdc, this fuse is built for large distribution switchboards, power panelboards, and motor control centers where high fault-current withstand and reliable time-delay response are required. The non-indicating, electrically isolated end cap design supports safe handling and long-term performance in commercial and industrial installations.

Key Features

  • Amperage Rating: 5-6/10A dual-element, time-delay fuse for precise, application-specific overcurrent protection.
  • Fuse Class: Class RK1 construction for use in standard fuse clips, switches, and RK1-rated panelboards and switchboards.
  • Voltage Rating: 250 Vac, 125 Vdc rating supports use across both AC and DC circuit applications.
  • Interrupt Rating: 300 kAIC at 250 Vac and 100 kAIC at 125 Vdc for dependable performance under high fault-current conditions.
  • Response Time: 8 seconds at 500% overload rides through motor starting current and transient inrush without nuisance opening.
  • Dual-Element Construction: Two internal elements combine time-delay overload protection with fast current-limiting short-circuit response in a single device.
  • Special Features: Electrically isolated end cap adds a layer of safety during installation and servicing.
  • Fuse Indicator: Non-indicating design for standard fuse holder applications.

Technical Specifications

  • Amperage Rating: 5-6/10A
  • Application: Large distribution switchboards, power panelboards, motor control centers
  • Class: Class RK1
  • Fuse Indicator: Non Indicating
  • Interrupt Rating: 300 kAIC at 250 Vac, 100 kAIC at 125 Vdc
  • Number Of Elements: Dual
  • Packaging Type: Standard
  • Response Time: 8s at 500%
  • Special Features: Electrically isolated end cap
  • Voltage Rating: 250 Vac, 125 Vdc
  • Product Type: Current-limiting, Time-delay
  • Product Length: 2 IN
  • Product Details: Current-limiting, Time-delay
  • Item Quantity: Carton: 10
  • Product Height: .56 IN
  • Product Weight: .5 LB
  • Product Width: .56 IN

Typical Applications

  • Large Distribution Switchboards
  • Power Panelboards
  • Motor Control Centers
  • Commercial and Industrial Electrical Systems

Why Bussmann?

Bussmann engineers its Low Peak fuse line with dual-element, current-limiting construction to deliver dependable, code-compliant overcurrent protection for demanding electrical environments. The Class RK1 rating, high 300 kAIC interrupt capacity, and electrically isolated end cap on the LPN-RK-5-6/10SP reflect a design focus on safety and long-term reliability. Specify the LPN-RK-5-6/10SP for consistent time-delay protection in switchboards, panelboards, and motor control centers.

Product Specs

Special Features:
Electrically isolated end cap
Application:
Large distribution switchboards, power panelboards, motor control centers
Fuse Indicator:
Non Indicating
Product Subgroup:
Fuses
Class:
Class RK1
Product Details:
Current-limiting, Time-delay
Product Group:
Circuit Protection
Packaging Type:
Standard
Department:
Electrical
Product Type:
Time-Delay Fuse
Number Of Elements:
Dual

Bussmann LPN-RK-15/100SP – Frequently Asked Questions

1) Will a Bussmann LPN-RK Low-Peak fuse fit standard Class R fuse clips in my switchboard?
The LPN-RK is a Class RK1 fuse, so it drops into standard fuse clips, switches, and RK1-rated panelboards and switchboards. Keep in mind that a rejection-style Class R clip will accept an RK1 fuse, but a Class R fuse will not fit a non-rejection holder sized for a different class. Check the holder is Class R before ordering.
2) Can the Bussmann LPN-RK be used on a 125 VDC circuit, or is it AC only?
Both. The LPN-RK is rated 250 Vac and 125 Vdc, with an interrupting rating of 300 kAIC at 250 Vac and 100 kAIC at 125 Vdc. That 250 Vac ceiling is the limit, so it is not suitable for 480 V or 600 V systems.
3) Will an LPN-RK fuse nuisance-trip on motor starting inrush?
It shouldn't. The LPN-RK is a dual-element, time-delay fuse with a minimum of 8 seconds at 500% of rating, which rides through motor starting current and transient inrush. The second element still gives fast current-limiting action on a short circuit.
4) Is the Bussmann LPN-RK suitable for a motor control center with high available fault current?
Yes. It is built for large distribution switchboards, power panelboards, and motor control centers, and the 300 kAIC interrupting rating at 250 Vac covers high fault-current service entrance and MCC locations. Current-limiting action also reduces let-through energy to downstream gear.
5) What amperage ratings does the Bussmann LPN-RK Low-Peak fuse come in?
Four ratings are offered: 0.15A (LPN-RK-15/100SP), 3-2/10A (LPN-RK-3-2/10SP), 5-6/10A (LPN-RK-5-6/10SP), and 90A (LPN-RK-90SP). The fractional low-amp ratings are the ones used for control transformer and small motor circuit protection where a whole-amp fuse would be too coarse.
6) Does the LPN-RK fuse have a blown-fuse indicator?
No. The LPN-RK is a non-indicating fuse, so there is no visual pop-up or LED to show it has opened. If your maintenance crew relies on a visual check, you will need a holder or panel with indication, or plan on metering the fuse.
7) What is the electrically isolated end cap on the LPN-RK for?
The isolated end cap keeps the cap electrically separated, which adds a measure of safety when an electrician is handling or pulling the fuse during installation and servicing. It does not change how the fuse mounts or its Class RK1 dimensions.
8) How many LPN-RK fuses come in a carton?
Standard packaging is a carton of 10, which is convenient if you are fusing three-phase circuits and want spares on the shelf in the same rating.
How fast can I get the Bussmann LPN-RK-15/100SP 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 LPN-RK-15/100SP come with a warranty?
Absolutely. The Bussmann LPN-RK-15/100SP 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 LPN-RK-15/100SP?
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 LPN-RK-15/100SP from ZenSupply?
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