Branch Miniature Circuit Breaker (MCB) with 120Vac shunt trip coil - Siemens (BL Series - BL type) - item #B12000S01 - 1-pole (1P) - rated current 20A - rated voltage 120Vac / 240Vac - control voltage 120Vac - short circuit breaking capacity 10kA.I.R. (120Vac / 240Vac) - bolt-on mounting