B-Line Eaton BAB thermal magnetic ,Thermal magnetic s,30A,10 kAIC,Three-pole,#14-4 AWG,DNBA

The DNBA3030 is a 30 amp three-pole thermal magnetic breaker with a 10 kAIC interrupting rating. That 10 kAIC figure is the one to check against the available fault current at your panel location, since a breaker applied above its interrupting rating is a code violation regardless of the trip setting.

A three-pole breaker is what a three-phase load requires, and the DNBA3030 gives you three poles at 30 amps on a common trip. For a single-phase 240V load such as a water heater or a two-wire compressor you want a two-pole instead, and for a 120V branch circuit a single-pole. Match the pole count to the number of ungrounded conductors feeding the equipment.

Each pole measures .4 inch wide, with the breaker standing 3.25 inches high and 3.5 inches deep, and it weighs about 1 lb. Being a three-pole device it occupies three adjacent bus positions, so you need three consecutive open spaces on the same bus stack, not three scattered ones.

Yes, the DNBA3030 carries CSA certification, which is the listing most Canadian inspectors and institutional specs look for on a branch breaker.

Order by the part number DNBA3030. It is the Eaton BAB-family thermal magnetic breaker at 30 amps, three-pole, 10 kAIC, with #14-4 AWG terminals. When standardizing spares across a facility, that number plus the 10 kAIC rating is what to record so replacements match the original application.

Thermal magnetic is the standard branch-circuit construction: a bimetal element handles sustained overloads and a magnetic element handles short circuits, with no adjustment to set. The DNBA3030 is that type at 30 amps. Electronic trip units are used where you need adjustable long-time, short-time, and instantaneous settings to coordinate with upstream devices, which is a distribution or feeder concern rather than a 30 amp branch circuit.