Littelfuse 880021 SD ATO Series Fuse Block with LED Indicators Owner’s Manual
- June 8, 2024
- Littelfuse
Table of Contents
Littelfuse 880021 SD ATO Series Fuse Block with LED Indicators

Description
SD ATO® Fuse Blocks provide a cost effective, consolidated circuit protection solution. Designed to accept standard ATO® fuses, these products ensure the safe distribution of power throughout an application. Integrated LED blown fuse indicators allow for quick maintenance, preventing troubleshooting & equipment downtime. These products are RoHS compliant. Fuses sold seperately.
Features
- LED blown fuse indicators
- Snap-on insulating cover (included)
Ordering Information
| PART NUMBER DESCRIPTION | PACKAGING |
|---|---|
| 880021 | 4 ATO® Fuse Block w/ LED |
| 880021-BP | 4 ATO® Fuse Block w/ LED Blister Pack |
| 880022 | 6 ATO® Fuse Block w/ LED |
| 880022-BP | 6 ATO® Fuse Block w/ LED Blister Pack |
| 880023 | 10 ATO® Fuse Block w/ LED |
| 880023-BP | 10 ATO® Fuse Block w/ LED Blister Pack |
Specifications
| Current Rating Max: | 100A |
|---|---|
| Current Rating Max Per Circuit: | 30A Max |
| Fuse Type: | ATO® Blade Fuse |
| Housing: | PBT |
| Input Terminals: | 10-32 Stud |
| Mounting Method: | Bolt-Down; 4xM5 |
| Number Of Cavities: | 4, 6, or 10 Circuits (varies by part number) |
| Output Terminals: | 6.3mm Blade |
| Recommended Torque: | 8 in-lb (0.9Nm) Max. |
| Temperature: | -20°C to 85°C |
| Max Voltage Rating: | 32V DC |
Applications
- Centralized distribution for accessory circuits
- Ideal solution for DIY projects
Benefits
- Centralizes wiring to a convenient location
- Insulating cover provides circuitry protection
- Continuous current rating of 100A
Related Products
SD MINI® Fuse Blocks
Designed to accept MINI® fuses.
ST ATO® Fuse Blocks (Screw Termination)
Designed to accept ATO® fuses.

Web Resources
Download 2D print, installation guide and technical resources at: littelfuse.com/SD-ATO

References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>