High-Performance Fast-Acting Fuse for Electrical Safety Littelfuse

Stock 2

200 Amp 300 Volt Fast Acting Class T Fuse · Littelfuse JLLN200

SKU: LIT-JLLN200

200A fast-acting Class T fuse for 300VAC systems with knife-blade construction and current-limiting protection. Commonly used for compact fuse blocks, drives, rectifiers, power supplies, and other equipment where fast fault clearing and space savings matter.

What this product is for

The Littelfuse JLLN200 is a 200A fast-acting UL Class T fuse for overcurrent protection in 300VAC electrical systems. It is built for compact installations that need high interrupting capacity and strong current-limiting performance.

Use for

Use for power distribution units, compact main switches, individual electric services and meters, variable speed drives, rectifiers, inverters, UPS equipment, and power supplies where a fast-acting Class T fuse is specified.

Avoid for

Avoid using this fuse where a time-delay fuse is required for high inrush loads unless the equipment documentation specifically allows a fast-acting Class T fuse. Always match fuse class, amp rating, voltage rating, and holder compatibility to the equipment design.

Best for

Best for electricians and maintenance teams needing a compact 200A fuse for equipment protection in commercial and industrial panels. It is especially useful where panel space is limited and high fault-current protection is required.

Installed in

Installed in Class T fuse blocks and related equipment designed for knife-blade Class T fuses. Typical applications include service equipment, control panels, drive cabinets, and power conversion assemblies.

Why this product exists

This fuse exists to provide fast fault clearing in a smaller footprint than many comparable fuse classes. Littelfuse states that Class T fuse blocks typically require less than 50% of the panel area of comparable Class R fuse blocks, which helps in compact equipment layouts.

Compared with similar products

Compared with larger fuse classes, this Class T fuse is selected when compact size, current limitation, and fast response are key buying factors. As typical trade guidance, fast-acting fuses are commonly chosen for sensitive equipment protection, while loads with higher startup current may require a different fuse type. Actual performance depends on equipment design, inrush current, installation conditions, and local electrical code.

Specifications

Manufacturer part number: JLLN200
Brand: Littelfuse
Fuse class: UL Class T
Current rating: 200A
Maximum AC voltage: 300VAC
Maximum DC voltage: 125VDC
Opening characteristic: Fast-acting
Construction: Knife-blade
Interrupting rating: 200 kA AC rms symmetrical; 20 kA at 125VDC
Current-limiting: Yes
Applicable standard: UL 248-15
Compliance: RoHS
Country of origin: Mexico

- SKU
  LIT-JLLN200
- Manufacturer Part #
  JLLN200
Compliance
RoHS
Current Rating
200A
Construction
Knife-blade
Maximum AC Voltage
300VAC
Maximum DC Voltage
125VDC
Fuse Class
UL Class T
Interrupting Rating
200 kA AC rms symmetrical; 20 kA at 125VDC
Opening Characteristic
Fast-acting
Country Of Origin
Mexico
Brands
Littelfuse
Stock in Flesherton
2

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