Overview
The Eaton C306DN3 is a 3-pole thermal overload relay engineered to protect motors and motor-branch circuit conductors from excessive heating caused by overloads and failure to start. This NEMA size 00/0 unit is rated for 32A at 600VAC and is designed to integrate seamlessly with Cutler-Hammer series non-reversing contactors and motor starters. The C306DN3 delivers dependable protection in industrial and commercial motor control applications.
Key Features
- Three-pole configuration with 1NO-1NC auxiliary contacts for integrated trip-free logic
- 600V maximum voltage rating with 32A nominal current capacity
- NEMA size 00/0 footprint—compact fit for Cutler-Hammer NEMA starters
- Plug-in or direct-panel mounting for flexible installation
- Thermal sensing element with adjustable current settings (0.254–38.5A FLA range)
- RoHS compliant construction
Technical Specifications
- Part Number: C306DN3
- Manufacturer: Eaton Cutler-Hammer
- Type: Thermal Overload Relay
- Poles: 3-Pole
- NEMA Size: 00, 0
- IEC Size: A–F
- Voltage Rating: 600VAC maximum
- Current Capacity: 32A nominal
- FLA Adjustment Range: 0.254–38.5A
- Auxiliary Contacts: 1NO, 1NC (trip-free)
- Mounting: Plug-in or panel/DIN rail compatible
- Weight: 1.0 lb
- Compliance: RoHS compliant
- Status: Discontinued by manufacturer
Typical Applications
- General-purpose AC induction motor protection in manufacturing and industrial facilities
- HVAC compressor and fan motor circuits
- Pump and conveyor drive motor overload protection
- Control of three-phase motor starters in panel boards and motor control centers
- Retrofit and replacement in existing Cutler-Hammer starter assemblies
Compatibility & Replacements
Compatible With
- Cutler-Hammer NEMA size 00 and 0 non-reversing motor starters
- Cutler-Hammer AN16 series contactors (AN16ANO, AN16BNO)
- 600V three-phase motor circuits
- AC11 and AC14 duty motor control systems
- Panel-mount and DIN-rail enclosures rated for 600V
Replaces / Drop-In Replacement For
- Legacy Eaton/Cutler-Hammer C306DN3 units requiring like-for-like substitution
- Verify compatibility with your specific Cutler-Hammer starter frame before ordering
Works With
- Cutler-Hammer Freedom series thermal overload relays (upgraded alternatives: C306DN3B)
- NEMA-rated motor control centers and disconnect switches
- Standard 600V industrial power distribution systems
- Time-delay and instantaneous trip schemes in motor protection circuits
