Bussmann LPN-RK-15/100SP Low-P...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$140.51
$105.26
Bussmann LPN-RK-15/100SP Low-Peak Class RK1 Time-Delay Fuse, 0.15A

Bussmann LPN-RK-15/100SP Low-Peak Class RK1 Time-Delay Fuse, 0.15A

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Model: LPN-RK-15/100SP
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$105.26
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Bussmann LPN-RK-15/100SP Low-Peak Class RK1 Time-Delay Fuse, 0.15A

The Bussmann LPN-RK-15/100SP Low-Peak fuse is a Class RK1 current-limiting, time-delay fuse rated 0.15A at 250 Vac, 125 Vdc, engineered to provide reliable overcurrent protection for large distribution switchboards, power panelboards, and motor control centers. Its dual-element time-delay design allows it to ride through motor inrush and other temporary surges while still opening quickly on sustained overloads and short circuits. With an interrupt rating of 300 kAIC at 250 Vac and 100 kAIC at 125 Vdc, this fuse is built to safely clear high fault currents in demanding industrial and commercial electrical systems.

Key Features

  • Amperage Rating: 0.15A for precise low-amperage circuit protection in control and instrumentation circuits.
  • Class RK1 Construction: Current-limiting, time-delay fuse design built to Class RK1 dimensions and performance characteristics.
  • Dual-Element Design: Two internal elements provide separate overload and short-circuit protection for dependable operation.
  • Voltage Rating: 250 Vac, 125 Vdc dual AC/DC rating suits a wide range of switchboard and panelboard applications.
  • High Interrupt Rating: 300 kAIC at 250 Vac and 100 kAIC at 125 Vdc for safe clearing of high fault currents.
  • Time-Delay Response: 8s at 500% response time lets the fuse ride through temporary inrush without nuisance opening.
  • Non-Indicating Design: Standard non-indicating fuse body.
  • Electrically Isolated End Cap: Special end cap construction adds an extra layer of electrical isolation for safer handling.

Technical Specifications

  • Amperage Rating: 0.15A
  • 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
  • Industrial and Commercial Overcurrent Protection
  • Control and Instrumentation Circuits

Why Bussmann?

Bussmann Low-Peak fuses are engineered with dual-element, time-delay construction and Class RK1 current-limiting performance to deliver dependable protection where reliability matters most. With a high interrupt rating of 300 kAIC at 250 Vac and 100 kAIC at 125 Vdc plus an electrically isolated end cap, this fuse is built for safe, code-compliant performance in demanding switchboard, panelboard, and motor control center applications.

Manufacturer Resources

Product Specs

Amperage Rating:
0.15A
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 Group:
Fuses
Department:
Electrical
Product Subgroup:
Current Limiting Fuses
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

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

1) Why choose a time-delay RK1 fuse instead of a fast-acting one for a control transformer circuit?
The dual-element time-delay build is what keeps it from blowing on inrush. This Low-Peak fuse carries two internal elements, one handling overload and one handling short circuit, and holds for 8 seconds at 500 percent of rating before opening. That rides through transformer magnetizing inrush and motor starting current while still clearing a sustained overload. A fast-acting fuse at 0.15A would open on the first energization. If your load has no inrush at all, a fast-acting fuse gives tighter component protection instead.
2) Is this fuse rated for DC control circuits?
It carries a dual rating: 250 Vac and 125 Vdc, with an interrupting rating of 300 kAIC on AC and 100 kAIC on DC. So it can be applied on a 125 volt DC control or battery circuit as well as AC, which is why it turns up in switchgear control panels that run both.
3) Does the LPN-RK-15/100SP have a blown fuse indicator?
No, it is a non-indicating fuse. There is no visual flag or pin to show it has opened, so troubleshooting means pulling it and checking continuity with a meter. If you want an indicating version for a panel where downtime diagnosis matters, look for the indicating variant of the Low-Peak line rather than this catalog number.
4) Is the 300 kAIC interrupting rating enough for a switchboard with high available fault current?
300 kAIC at 250 Vac is the top of the scale for a Class RK1 fuse and covers essentially any available fault current you will see on a 250 volt distribution system. On DC the rating is 100 kAIC at 125 Vdc. Because the fuse is current-limiting, it also cuts the let-through energy during a fault, which is what lets it protect downstream equipment in switchboards, power panelboards, and motor control centers.
5) What does the electrically isolated end cap on this Low-Peak fuse actually do for me?
The special end cap construction adds a layer of electrical isolation on the fuse body, which reduces the shock exposure when handling the fuse during installation or removal in an energized cabinet. It is a construction feature of the fuse itself, listed under its special features, and it does not change the electrical ratings.
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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