SIEMENS B330 Circuit Breaker 30A 3 Pole 240V AC 10kA

SIEMENS B330 30A Three-Pole Breaker

The SIEMENS B330 is a bolt-on circuit breaker rated at 30 amps with three poles for 240 V AC systems. It is designed for use in compatible Siemens panelboards where standard branch-circuit protection is required. The unit carries a 10 kA interrupting rating and meets UL, CSA and NOM certifications. It suits electricians and maintenance crews fitting or replacing branch breakers in commercial or residential panels.

Capacity and headroom: 30 A continuous

The breaker handles continuous loads up to its 30 A rating and will interrupt short-circuit currents up to 10 kA at 240 V AC. It accepts copper conductors from 14 AWG to 6 AWG and aluminium from 12 AWG to 6 AWG, giving flexibility for typical branch wiring. The 125 A frame size provides physical space for the lugs but does not raise the device’s ampere rating. Applications requiring higher continuous current or a greater interrupting rating will need a different breaker.

240 V AC only — no DC rating

This device is rated solely for 240 V AC and carries no DC voltage rating, so it cannot be used in DC circuits such as solar arrays or battery banks. The three-pole construction occupies three panel spaces and uses a bolt-on mounting style specific to Siemens B-series panelboards. Verify panelboard compatibility and voltage requirements before purchase.