Littelfuse, 0451015.MRL, Circuit Protection Devices, Electronic Fuses

 451 Series Very Fast-Acting 125 V 15 A 6.1 x 2.69 mm NANO2® Ceramic Fuse

https://www.futureelectronics.com/p/electromechanical--circuit-protection--electronic-fuses/0451015-mrl-littelfuse-9442476