Shawmut TR150R is a 150 A, 250 V time-delay, current-limiting fuse from the Ferraz Shawmut/Mersen Tri-Onic TR-R family (RK5 class). It is commonly used to protect transformer secondaries and other high-current circuits, tolerating short inrush events while reliably interrupting faults that exceed its rating. The TR150R is rated for 250 V AC or 250 V DC, making it suitable for AC or DC power systems up to 250 V.
