Siemens 3NA1 021 Fuse

Siemens 3NA1 021 fuse is a 100 A, 500 V AC low-voltage HRC fuse link from the SENTRON 3NA family, rated for 100 kA short-circuit breaking capacity and built to the VDE 0660 standard. The 3NA1-021 model is designed to be inserted into Siemens SENTRON 3NA LV fuse bases to deliver modular overload and short-circuit protection in distribution panels and switchgear. With a 500 V AC nominal voltage and a 100 A current rating, it provides fast-acting protection for feeders and control circuits, and it is part of a broader family used throughout industrial and commercial electrical installations. As a component of the 3NA LV fuse system, it supports straightforward replacement and selective coordination in compliant configurations.