This Siemens BLF GFCI BLF120 20 amp 1 pole 120/240 vac bolt on breaker GFI 20A ITE is a circuit protection device manufactured by Siemens. It provides overcurrent protection, breaking the circuit automatically if current exceeds a safe level. Key specifications noted on this listing include 240 vac, 20 amp, 20A, 1 pole. It is commonly in power distribution panels and industrial control circuits.
