The 0680L0500-11 from Bel Fuse Inc. is a 500 mA fuse rated 125 VAC and 125 VDC, for board mounting, in a surface-mount 2-SMD square end block (cartridge style excluded).
The 0680L0500-25 from Bel Fuse Inc. is a 500 mA fuse rated 125 VAC and 125 VDC, for board mounting, in a surface-mount 2-SMD square end block (cartridge style excluded).
The 0680L0500-21 from Bel Fuse Inc. is a 500 mA fuse rated 125 VAC and 125 VDC, for board mounting, in a surface-mount 2-SMD square end block (cartridge style excluded).
The 0680L0500-01 from Bel Fuse Inc. is a 500 mA, 125 V AC/DC slow-blow surface-mount fuse with a square end block, board-mount style (cartridge style excluded), in a 2-SMD package.