BUSSMANN DLN-R-300 U is a 300 A, 250 V AC dual‑element, time‑delay fuse in Eaton’s Bussmann DLN‑R family (UL Class RK5). Cataloged as DLN‑R‑300 or DLNR‑300, it carries an interrupt rating of 200,000 A RMS symmetrical and 20,000 A DC, with an approximate weight of 1.9 lb. This fuse is intended for heavy‑duty protection in power‑distribution circuits and industrial equipment operating at 250 VAC, relying on the dual‑element construction to tolerate temporary inrush currents without nuisance trips. It carries UL RK5, CE, and CSA listings, confirming its compliance for industrial applications; note that it is a fuse—not a circuit breaker—for overcurrent protection in the specified ratings.
