Siemens 3NA3 244 Fuse

Siemens 3NA3 244 is a low-voltage, high-rupturing-capacity fuse link from the SENTRON 3NA COM family, intended for installation in NH2 fuse bases as part of Siemens LV HRC fuse systems. The 244 code identifies a 250 A nominal current rating (In) with a rated operating voltage of 500 V AC and 440 V DC (Un), using a general‑purpose (gG) fuse element. It includes a front indicator and live‑grip lugs for straightforward, tool‑assisted insertion and quick status checks within panelboards, switchgear enclosures, and motor-control centers. This variant is designed to protect feeders and distribution circuits while enabling selective coordination with other 3NA links in a shared 3NA COM housing, so faults can be isolated rapidly without affecting the entire system. Suitable for industrial power distribution where reliable, fast replacement and clear fuse status are priorities, the 3NA3 244 is a standard choice for Siemens SENTRON protective architectures in control panels and distribution cabinets. When paired with compatible 3NA COM components, it supports consistent protection levels across a distributed electrical network and helps meet typical industry practices for LV fuse protection.