A circuit that won't reset, a breaker that trips immediately, or a panel that needs a new branch added — and you need to know this is the right breaker before you drive across town. This 1-pole, 30-amp, 1-inch breaker is the type commonly used for 240-volt single-phase loads: electric water heaters, well pumps, air conditioners, and baseboard heaters in the 30-amp range. 1-pole, 30-amp, 1-inch per breaker space (Square D/Eaton Type BR format). Confirmed compatible with Square D and Eaton Type BR load centers. UL listed. HACR-rated for air conditioning and heat pump circuits. The 1-inch per pole format is the standard for residential panels across this region — it drops in without modification to the bus bar. What electricians stocking job-site trucks across northeast Nebraska and northwest Stocked at Crofton Lumber and Akron Lumber.