The F03B250V1AS is a fuse qualified under Military Standard MIL-F-15160/03 for use in instruments, power, and telephone equipment. It has a voltage rating of 250V and a current rating of 1A, with physical dimensions of 1/4" x 1 1/4". This part number includes silver-plated fuse caps, as indicated by the "S" suffix. While its commercial design equivalent is the MDA Series, this part is specifically intended for military applications requiring adherence to MIL-F-15160 specifications.