45 Amp 600 Volt Fast Acting Class J Fuse · Littelfuse JLS045
45A Class J cartridge fuse rated 600V AC with fast-acting, current-limiting protection for branch circuit, feeder and industrial equipment protection. Typical applications include control panels, disconnects and motor-related circuits where a Class J fuse is specified.
What this product is for
The Littelfuse JLS045 is a 45A Class J industrial cartridge fuse for fast-acting overcurrent protection on 600V AC systems. It is used where current-limiting protection and a compact Class J footprint are required.
Use for
Use for industrial control panels, fused disconnects, branch circuits, feeders and equipment protection where a 45A, 600V AC, Class J fast-acting fuse is specified by the equipment maker or design documents.
Avoid for
Avoid using this fuse where a different UL fuse class, time-delay characteristic, voltage rating or ampere rating is required. Do not substitute for non-Class J applications unless the equipment documentation and local code allow it.
Best for
Best for electricians and maintenance teams needing compact, current-limiting Class J protection with fast opening on fault conditions to help protect downstream equipment.
Installed in
Typically installed in Class J fuse holders, switchboards, panelboards, machinery disconnects and OEM equipment built for 600V AC industrial distribution systems.
Why this product exists
This fuse provides fast-acting protection for circuits that need quick response to overcurrent and short-circuit events. The Class J format also helps save space compared with larger fuse classes in similar applications.
Compared with similar products
Compared with time-delay Class J fuses, this JLS series fuse opens faster and is better suited to applications that call for fast-acting protection. As with any fuse selection, actual suitability depends on inrush current, available fault current, holder compatibility and local electrical code.
Specifications
- Brand: Littelfuse
- Manufacturer part number: JLS045
- Product type: Class J fuse
- Ampere rating: 45A
- Voltage rating: 600V AC
- Response type: Fast-acting
- Interrupting rating: 200 kA at 600V AC
- Construction: Industrial cartridge
- Fuse family: Current-limiting
- Indication: Non-indicating
- Voltage600V AC
- Ampere Rating45A
- IndicationNon-indicating
- ConstructionIndustrial cartridge
- Interrupting Rating200 kA at 600V AC
- BrandsLittelfuse
Aptico Supply Delivery
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Aptico Supply helps electricians, contractors, and commercial buyers get the electrical materials they need without unnecessary delays. Whether you are ordering for a jobsite, restocking service inventory, or arranging pickup, our delivery options are designed to keep work moving.
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Free daily delivery is available for larger contractor accounts.
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Delivery Questions
Do you offer free delivery?
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Can I pick up my order?
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Do delivery charges apply?
Delivery charges may apply outside regular local routes, for smaller orders, or for oversized and heavy items.
Can you deliver to jobsites?
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