Description
The Littelfuse 0NLS040.T is a 40 amp, 600 VAC (400–500 VDC class) fast-acting Class K5 fuse designed for general-purpose overcurrent protection in residential, commercial, and light industrial applications. As part of the NLS series, this one-time fuse provides economical protection for feeder and branch circuits where high-performance current-limiting is not required.
Its fast-acting design allows it to quickly interrupt overloads and short circuits, making it suitable for circuits with minimal inrush current such as lighting and resistive heating loads. With an interrupting rating up to 50,000 amps, it offers improved protection over older Class H fuses while maintaining a cost-effective solution.
Key Features:
- 40 amp current rating for general circuit protection
- 600 VAC / up to 400–500 VDC rating
- Fast-acting (one-time) fuse for rapid fault interruption
- Class K5 fuse with up to 50 kA interrupting rating
- Economical solution for feeder and branch circuits
- Knife-blade style for secure installation
- Ideal for resistive loads, lighting, and low inrush applications
