Siemens LGB3B045 Bolt On 3 Pole Circuit Breaker

Siemens LGB3B045 Bolt-On 3-Pole Circuit Breaker is a 45 A, three-pole molded‑case protector designed for panelboard installations in commercial and light industrial environments. Part of Siemens’ VL Series LGB bolt‑on family, it delivers thermal‑magnetic protection with distinct long‑time and instantaneous trip functions for three‑phase circuits, enabling reliable interruption of faults without tripping surrounding devices. Rated for 600Y/347V AC (600 V line‑to‑line, 347 V line‑to‑neutral), this device supports high short‑circuit capabilities that vary with voltage: up to 14 kAIC at 600Y/347V, up to 65 kAIC at 480Y/277V, and up to 100 kAIC at 240V, providing robust protection for feeders and downstream equipment. The bolt‑on mounting design is intended for compatible Siemens panelboards, offering a compact three‑pole solution where quick replacement and straightforward installation are prioritized. The LGB3B045B designation denotes a 3‑pole, 45‑amp frame within the LGB family, commonly used where reliable, code‑compliant overcurrent protection is required in low‑voltage distributions.