Cutler Hammer HFWF3125L 3-Pole 125A 690VAC Molded Case Circuit Breaker The Cutler Hammer HFWF3125L circuit breaker is a heavy-duty molded case circuit breaker (MCCB) designed to provide uncompromising overcurrent and short-circuit protection. This 3-pole, 125-amp unit is especially well suited to high electrical stress applications and is designed for demanding industrial, commercial, and maritime power distribution systems. With an outstanding working voltage rating up to 690VAC, the HFWF3125L provides system stability, prevents costly outages, and protects sensitive downstream equipment from catastrophic electrical problems. It is extremely robust to mechanical vibration and heat fluctuation thanks to its ruggedized internal construction. Model Details: Brand: Cutler-Hammer / Eaton Model Number: HFWF3125L MPN: HFWF3125L Country of Origin: United States Technical Specs Parameter Specification Number of Poles 3-Pole Amperage Rating 125 Amps Voltage Rating 690 VAC Frame Type F-Frame (High Interrupting) Trip Unit Type Thermal-Magnetic (Fixed) Phase Connection 3-Phase Frequency 50/60 Hz Terminal Connection Load-side / Line-side Lugs Included Our Engineer’s Guide: The HFWF3125L is a staple in 690V distribution architectures for a reason: thermal stability. When you are dealing with transient harmonics or high startup currents from large inductive loads (like three-phase motors or heavy winches), cheap breakers fatigue and nuisance trip. The F-frame housing on this unit handles localized thermal expansion beautifully, preventing mechanical drift in the trip latch over extended deployments
