1.When using a set time range that is shorter than 30 hours, the substitute product is H3CR-F8 Solid-state Timer. If the set time range is 30 hours or longer, the substitute product is H3CR-F8-300. Because the length of the body is approximately 12 mm shorter than that of H3BF-8, Y92H-8 Hold-down Clips should be used instead of Y92H-2 when using PF085A Sockets, and Y92H-7 Hold-down Clips should be used instead of Y92H-1 Hold-down Clips when using PL08 Sockets.