Littelfuse 251003 3A very fast acting pico fuse Bussmann MCR 3 Amp 3 A 125 V Littelfuse 251003 PICO II Very Fast-Acting Type Fuse. 251 Also known as: fm10. 253 Mounting: Axial Opening: Fast-Acting Application: Axial/Radial Military Components Aerospace Business Equipment Computers Consumer Electronics. Priced per each and sold in packages of 5.