Littelfuse JLLS003 600V Class T Fuse 3 Amp

Product Description

The LITTELFUSE JLLS003 is a Class T current-limiting fuse rated at 600 volts and 3 amps. Class T fuses are recognized for their compact footprint and high interrupting capacity, making them well-suited for protecting sensitive equipment in tight panel and disconnect enclosures. This fuse provides fast-acting overcurrent protection by opening the circuit rapidly under fault conditions, limiting let-through energy to downstream components. Electricians and panel technicians install this type of fuse in applications where space is limited and high fault-current interrupting ratings are required by code or equipment specifications.

This fuse is used in industrial control panels, motor control centers, power distribution boards, and commercial electrical enclosures where 600-volt Class T fuse holders are installed. Its compact body fits Class T fuse blocks and disconnect switches designed for that form factor. It is appropriate for both new installations and replacement service work where an existing Class T fuse of the same amperage and voltage rating has failed or requires routine maintenance replacement.

Key Features

• 600-volt AC rating suitable for commercial and light industrial power distribution
• 3-amp current rating for low-amperage branch circuit and control circuit protection
• Class T form factor delivers high interrupting capacity in a compact fuse body
• Current-limiting design minimizes let-through energy during fault events
• Fast-acting response helps protect downstream electronic and electromechanical components

Compatibility

Designed as an OEM-style replacement for Class T fuse holders and disconnect blocks rated for 600-volt, 3-amp fuses in commercial and industrial electrical applications.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC requirements for overcurrent protection and fuse sizing. De-energize and lock out the circuit before removing or installing any fuse. Confirm the fuse holder is rated for Class T fuses at 600 volts before installation. Do not substitute a fuse of a different class, voltage rating, or higher amperage rating than the original equipment specification requires.

Technical Specifications

• Voltage Rating: 600 volts
• Amperage Rating: 3 amps
• Fuse Class: Class T
• UPC: 07945819047

Standard Information

• Brand: LITTELFUSE
• Manufacturer Part Number: JLLS003