Siemens BLF120 Molded Case Circuit Breaker

Siemens BLF120 molded‑case circuit breaker is a SpeedFax Type BL one‑pole protective device rated for 120 VAC and 20 A, designed for bolt‑on mounting in Siemens panelboards. It provides thermal‑magnetic protection with distinct long‑time and instantaneous trip actions and carries a 10 kA interrupt rating at 120 V, making it suitable for branch circuits in lighting and general‑power installations that use BL family breakers. This 1‑pole unit aligns with BL frame geometry for compatible panelboard integration and delivers reliable overload and short‑circuit protection in commercial or residential wiring that requires Siemens BLF‑series protection.