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50 Amp 600 Volt Fast Acting Class T Fuse · Littelfuse JLLS050
SKU: LIT-JLLS050
50A Class T fast-acting cartridge fuse rated 600VAC for current-limiting protection of branch circuits, control panels, and sensitive equipment. Commonly used where high interrupting capacity and compact Class T fuse protection are required in commercial and industrial installations.
What this product is for
The Littelfuse JLLS050 is a 50A fast-acting Class T cartridge fuse used for overcurrent protection in commercial and industrial electrical systems. It is commonly selected for protecting feeders, branch circuits, control equipment, and other sensitive components where fast fault clearing and current limitation matter.
Use for
Use for 600VAC systems requiring a 50A Class T fuse, including switchboards, panelboards, fused disconnects, control panels, and power distribution equipment designed for this fuse class. It is also used where available fault current is high and a compact fuse footprint is preferred.
Avoid for
Avoid using this fuse where another fuse class, time-delay characteristic, voltage rating, or mounting style is specified by the equipment manufacturer. Do not substitute based on amp rating alone; Class T dimensions and application requirements must match the holder and equipment approval.
Best for
Best for electricians and maintenance teams protecting sensitive equipment that benefits from fast-acting, current-limiting fuse performance. This is a practical choice when you need a 50A Class T fuse for commercial or industrial service equipment and control applications.
Installed in
Typically installed in Class T fuse blocks, fused switches, distribution equipment, and OEM assemblies in commercial buildings, industrial facilities, and machinery control systems. Actual application depends on equipment design, available fault current, and local electrical code.
Why this product exists
Class T fuses are used where compact size, fast response, and strong current-limiting performance help reduce damage during short circuits. Compared with more general-purpose fuse types, this style is commonly chosen for tighter spaces and higher interrupting applications.
Compared with similar products
Compared with time-delay fuses, this fast-acting fuse clears faults more quickly and is better suited to equipment that does not require temporary inrush tolerance. Compared with other UL fuse classes, Class T fuses are compact and commonly used where high interrupting ratings and current limitation are important. Always match the fuse class and characteristics to the equipment specification.
Specifications
- Manufacturer: Littelfuse
- Manufacturer part number: JLLS050
- Product family: JLLS Series
- Product type: Class T cartridge fuse
- Ampere rating: 50A
- Voltage rating: 600VAC
- Action: Fast-acting
- Construction: Cartridge style
- Protection characteristic: Current-limiting
- Typical approvals: UL and CSA listings referenced by manufacturer and distributors
- Voltage600VAC
- ConstructionCartridge style
- Product FamilyJLLS Series
- Ampere Rating50A
- ActionFast-acting
- BrandsLittelfuse
- Stock in Elmira3
- Stock in Flesherton2
Aptico Supply Delivery
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Local delivery routes, pickup options, and contractor-focused service from our Elmira and Flesherton locations.
Delivery Built Around Electrical Contractors
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.
Free Daily Delivery
Free daily delivery is available for larger contractor accounts.
- Order by 9:00 AM for morning delivery
- Order by 2:00 PM for afternoon delivery
- Available in qualifying local delivery areas
Free Weekly Delivery
Free weekly delivery is available for smaller accounts in select service areas.
- Elmira area delivery: Tuesday
- Flesherton area delivery: Thursday
- Order by 11:00 AM on the route day
Pickup Options
Pickup is available from our Ontario locations for customers who prefer to collect their order directly.
- Elmira pickup available
- Flesherton pickup available
- Call ahead for large or special-order items
Local Delivery Areas
See our local delivery coverage below. Delivery charges may apply outside regular route areas or for oversized items.
Delivery Questions
Do you offer free delivery?
Yes, free delivery is available for qualifying contractor accounts and selected local delivery routes.
Can I pick up my order?
Yes, pickup is available from our Elmira and Flesherton locations.
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?
Yes, jobsite delivery may be available depending on the order size, location, and delivery schedule.
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