2N1849

Standard-recovery silicon controlled rectifier (SCR) thyristor housed in a heavy-duty metal stud-mount housing, built to survive repetitive peak inverse strain when switching heavy capacitive or inductive circuits safely. Equivalents: NTE5544, Solid State Inc. 2N1849. Real-Life Examples: High-horsepower industrial magnetic brake triggers, heavy machinery motor starter blocks, and commercial facility backup generator power switching grids.