Bussmann Low-Peak Class J Dual...
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$36.19
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Bussmann Low-Peak Class J Dual-Element Time-Delay Fuse

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Model: LPJ-10SP

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

$36.19
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Bussmann Low-Peak Class J Dual-Element Time-Delay Fuse

The Bussmann Low-Peak Class J Dual-Element Time-Delay Fuse family delivers reliable, current-limiting overcurrent protection for demanding electrical systems. Available in ratings from 10A through 100A, this Low-Peak line is rated 600VAC/300VDC and pairs a time-delay element with fast-acting current limitation, allowing the fuse to ride through normal motor inrush and temporary overload conditions while still responding quickly to clear damaging short-circuit faults. Each fuse in this family is a non-rejection style Class J fuse that fits standard Class J fuse holders, blocks, and disconnect switches used throughout industrial, commercial, and institutional facilities. Electricians and specifiers select the amperage rating that matches their branch circuit, feeder, motor, or transformer application, then rely on the Low-Peak design for dependable, code-recognized Class J overcurrent protection.

Key Features

  • Amperage Range: Available in ratings of 10A, 25A, 30A, 50A, 70A, 80A, and 100A, sized to provide dependable overcurrent protection for a wide range of branch circuits, feeders, and equipment loads.
  • Dual Voltage Rating: Rated 600VAC/300VDC across the family, allowing these fuses to be applied across a broad range of AC and DC electrical distribution systems.
  • Class J, Non-Rejection Style: Non-rejection Class J construction fits standard Class J fuse holders, fuse blocks, and disconnect switches without requiring rejection-style clips.
  • Dual-Element, Time-Delay Design: Dual-element, time-delay construction lets each fuse ride through normal motor starting inrush and temporary overload conditions without nuisance opening.
  • Current-Limiting Protection: Current-limiting performance reduces peak let-through current and energy during short-circuit fault conditions, helping protect downstream conductors and equipment.
  • Low-Peak Series: Part of the Bussmann Low-Peak line of dual-element, time-delay fuses widely specified for industrial, commercial, and institutional electrical systems.
  • Space-Saving Class J Footprint: Class J fuse dimensions allow for compact fuse block and disconnect layouts compared to larger fuse classes, across every amperage in the range.

Technical Specifications

  • Amperage Rating: 10A - 100A (select amperage at checkout)
  • Voltage Rating: 600VAC/300VDC

Typical Applications

  • Motor Branch-Circuit and Feeder Protection
  • Transformer Overcurrent Protection
  • Industrial and Commercial Electrical Distribution Systems
  • Class J Fused Disconnect Switches and Fuse Blocks
  • Circuits Requiring Time-Delay, Current-Limiting Protection
  • Overload and Short-Circuit Fault Protection

Why Bussmann?

Bussmann Low-Peak fuses are engineered with dual-element, time-delay, current-limiting technology to deliver dependable circuit protection for demanding electrical applications. This Class J, non-rejection family, rated 600VAC/300VDC across its 10A to 100A range, is a trusted choice for electrical professionals specifying Class J overcurrent protection for motors, transformers, and general branch-circuit and feeder applications in industrial and commercial facilities. Choosing genuine Bussmann Low-Peak fuses helps ensure consistent time-delay and current-limiting performance across a facility's fuse protection scheme, regardless of which amperage rating is selected.

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Manufacturer Resources

Product Specs

Product Type:
Fuse
Amperage Rating:
10A - 100A
Voltage Rating:
600VAC/300VDC
Series:
Low-Peak
Department:
Electrical
Product Subgroup:
Shop by Brand
list_batch:
BUSS-20260919
Configuration:
Class J, Non-Rejection, Dual-Element Time-Delay

Bussmann LPJ-10SP – Frequently Asked Questions

1) What amp ratings does the Bussmann LPJ-SP Low-Peak Class J fuse come in?
The Low-Peak LPJ-SP Class J line is offered in 10A (LPJ-10SP), 25A (LPJ-25SP), 30A (LPJ-30SP), 50A (LPJ-50SP), 70A (LPJ-70SP), 80A (LPJ-80SP), and 100A (LPJ-100SP). All share the same 600VAC/300VDC rating and dual-element time-delay construction, so you pick strictly on the ampere size your branch circuit, feeder, or motor calls for.
2) Will a Bussmann LPJ-50SP fit a standard Class J fuse block or fused disconnect?
Yes. The LPJ-50SP is a non-rejection Class J fuse, so it drops into standard Class J fuse holders, fuse blocks, and disconnect switches without needing rejection-style clips. It uses the Class J body dimensions, which is why Class J blocks and disconnects are physically more compact than equivalent larger-class gear.
3) What is the difference between a time-delay Class J fuse and a fast-acting one for motor loads?
A dual-element time-delay fuse like the Low-Peak LPJ carries normal motor starting inrush and short temporary overloads without opening, then still clears a short circuit fast and current-limits the let-through energy. A fast-acting Class J fuse has no such delay element and will typically open on motor inrush, so it is used on non-motor loads and where the equipment is sensitive to let-through. For motor branch circuits, transformers, and feeders, the time-delay LPJ is the one to specify.
4) Does a Class J fuse protect downstream equipment better than a non-current-limiting fuse?
The Low-Peak LPJ is current-limiting, meaning it cuts off the fault before it reaches peak and reduces both peak let-through current and let-through energy during a short circuit. That is what protects downstream conductors, starters, and control gear from damage, and it is why Class J current-limiting fuses are specified where equipment short-circuit ratings depend on the upstream device.
5) Can I mix LPJ amp sizes across one facility's fuse blocks?
Yes, and that is the usual practice. Every LPJ-SP size from 10A up through 100A shares the same Class J non-rejection body style and the same 600VAC/300VDC rating, so an MRO crew can stock a spread of sizes that all seat in the same Class J blocks and disconnects while keeping consistent time-delay and current-limiting behavior across the plant.
6) I am replacing a blown LPJ-50SP. Do I need the exact same part number?
Replace it with the same ampere rating, LPJ-50SP at 50A, unless your one-line or the equipment nameplate calls for a different size. Substituting a higher amp fuse to stop repeat openings defeats the coordination and the equipment protection the Class J current-limiting fuse was selected to provide. If the fuse keeps opening on starting, the issue is sizing or the load, not the fuse type.
How fast can I get the Bussmann LPJ-10SP 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 LPJ-10SP come with a warranty?
Absolutely. The Bussmann LPJ-10SP 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 LPJ-10SP?
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 LPJ-10SP from ZenSupply?
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