Eaton HFD3090L Molded Case Circuit Breaker Unit

Module Feature

HFD3090L belongs to Eaton Series C HFD molded case circuit breaker,F frame,3-pole,90A rated current,600VAC /250VDC. It adopts fixed thermal-magnetic trip unit; thermal element protects overload,magnetic element provides instantaneous short-circuit protection. High interrupt capacity:100kAIC@240V,65kAIC@480V. Widely used in MCC cabinets,power distribution panels,fans,pumps and general industrial power circuit protection.

Working principle

Bimetallic strip heats and deforms under continuous overload current to trigger thermal trip. Magnetic coil instantly trips when severe short-circuit current occurs. Manual handle supports ON/OFF/RESET operation. Optional auxiliary contacts can feed breaker running/trip status back to PLC control system.

Onboard components

Molded insulating housing,bimetal thermal element,magnetic trip coil,main contact assembly,arc quenching chamber,manual operating handle,line & load terminal blocks.

LED indicators

No built-in LED indicators; status feedback comes from optional auxiliary contact.

Hardware self-diagnosis

Contact wear inspection,insulation resistance test,trip function test,arc chamber contamination inspection.

Programming software

No dedicated programming software,manual operation and hardwired status feedback.

Electrical & Process Parameters

Model:HFD3090L Brand:Eaton Device type:Series C HFD F-frame Molded Case Circuit Breaker Pole:3P Rated current:90A Rated voltage:600VAC,250VDC Trip:Fixed thermal-magnetic Interrupt rating:100kAIC@240VAC,65kAIC@480VAC Frequency:50/60Hz Cooling:Natural convection cooling Protection:Overload thermal protection; short circuit instantaneous magnetic protection

Mechanical & Structure

Mounting:Panel / MCC bucket mounting Protection class:IP20 front face Housing:Glass-filled thermoplastic molded case

Environmental

Operating temperature:-10℃ ~ +40℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non-condensing Certification:CE,UL compliant Status: Eaton Series C high interrupt MCCB for industrial power distribution and MCC applications

Installation

Follow strict ESD safety procedure before handling.Mount breaker firmly inside MCC bucket or control panel.Connect line side and load side power lugs with correct torque.Check trip unit rating matching circuit load before power commissioning.

Interface

Line side terminal,load side terminal,optional auxiliary contact terminal.

Diagnostic

Nuisance trip:motor overload,high ambient temperature or improper amp rating. Fail to trip:contact welding or damaged trip element. Arc discharge:overcurrent or loose wiring terminal.

Product Brief

Eaton HFD3090L Series C F-frame 3-pole 90A molded case circuit breaker,600VAC rated,thermal-magnetic trip,high interrupt capacity for industrial power distribution and motor control center circuit protection.