“D” stands for dual-exhaust, defaulted to single-exhaust when no“D”

“S” stands for stainless steel hardware, and no “S” stands for hot-dip galvanized carbon steel hardware

“R” stands for silicon rubber insulator, and no "R" stands for porcelain insulator

Rated short circuit breaking current: 8kA/12.5kA/16kA

Rated working current: 100A/200A

Rated working current: 12kV

Design serial number: “301” stands for rated current of 100A

                              “303” stands for rated current of 200A

Stands for dropout fuse

For example:

DOF301-12/100-12.5-R-S stands for 12KV outdoor AC HV dropout fuse (single-exhaust), with rated current of 100A, breaking current of 12.5KA, silicon rubber insulator and stainless steel hardware.

DOF303-12/200-12.5-D stands for 12KV outdoor AC HV dropout fuse (dual-exhaust), with rated current of 200A, breaking current of 12.5KA, porcelain insulator and hot-dip galvanized carbon steel hardware.