Used for branch circuit protection, GMB Series includes UL489, AC, miniature molded circuit breakers that come in 1-, 2-, and 3-pole arrangements ranging from 0.5–63 A. Short circuit interrupt capacity is 10 kA. Used for supplementary circuit protection, GSB Series includes UL1077, AC, supplementary circuit protectors that come in 1-, 2-, 3-, and 4-pole variations that range from 1–63 A and have short circuit interrupt capacity of 5 kA. Both series have 17.5 mm wide housings (per pole).