Eaton NSB-HFB3090L Molded Case Breaker MCCB Unit

The Eaton NSB-HFB3090L Molded Case Breaker (MCCB) is a three-pole protection device for three-phase power systems. This model is rated at 90 A and supports voltages up to 600 V, with operation at 50 Hz or 60 Hz. As part of Eaton’s NSB-HFB MCCB lineup, the HFB3090L uses a molded case construction and a 3P configuration to offer compact, reliable overcurrent protection for distribution circuits in 3-phase installations. Molded case breakers interrupt abnormal current to protect circuits and equipment, making this unit suitable for mid-sized commercial and light industrial power distribution where standard 50/60 Hz service is present. The 3P 90A 600V rating defines its core electrical characteristics and helps engineers match the device to their three-phase protection needs.