HLDB3600FT33W Explained: Eaton Series C 600 Amp 3-Pole L-Frame Circuit Breaker Frame

HLDB3600FT33W Explained: Eaton Series C 600 Amp 3-Pole L-Frame Circuit Breaker Frame

Someone handed you this part number and you need to know what it actually is before you buy it. HLDB3600FT33W is an Eaton Series C circuit breaker frame built on what Eaton calls the L-frame. It has three poles and a 600 A rating.

Here is the part that catches people out. This is a frame only, so the trip unit that does the sensing and the terminals that land your cable are not in the box and have to be purchased on their own. The T33 in the part number tells you which trip unit the frame is meant to take, a Digitrip 310 RMS electronic LS type. The interrupting rating, meaning the largest fault current the device can safely break, is 100 kAIC at 240 Vac and 65 kAIC at 480 Vac. It works on 50 to 60 Hz power and is UL Listed.

Common Applications

• Panelboards and switchboards
• Motor control centers and busway assemblies
• Assembling or rebuilding an L-frame breaker from separate parts
• Main and branch circuit protection in a distribution system
• Facilities such as commercial buildings, data centers, healthcare, marine, oil and gas, and water and wastewater

Key Features

• Frame only: The trip unit and terminals are separate purchases.
• Three-pole, 600 A: Sized for three-phase circuits at a 600 A rating.
• Matched to a 310 RMS LS trip unit: The T33 code identifies the Digitrip 310 RMS electronic LS trip type.
• Strong fault handling: Rated 100 kAIC at 240 Vac; 65 kAIC at 480 Vac.
• Standard power frequencies: Rated for 50 to 60 Hz.
• Safety listing: UL Listed per the manufacturer.

Specifications

• Catalog Number: HLDB3600FT33W
• Manufacturer: Eaton (Cutler-Hammer)
• Product Type: Molded case circuit breaker frame
• Series: Series C
• Frame: L
• Circuit Breaker Type: HLDB
• Configuration: Frame only, trip unit and terminals not included
• Number of Poles: Three-pole
• Amperage Rating: 600 A
• Trip Unit Designation: Digitrip 310 RMS, electronic LS trip type
• Trip Type Code: T167
• Interrupting Rating: 100 kAIC at 240 Vac; 65 kAIC at 480 Vac
• Terminals: Without terminals
• Frequency Rating: 50 to 60 Hz
• Certification: UL Listed

Product Identification

• UPC: 786679281086
• Weight: 19.7 lb, manufacturer-stated product weight

FAQ

What does HLDB3600FT33W mean? HLDB is the Eaton L-frame breaker type, 3 is the pole count, 600 is the ampere rating, F marks it as a frame, T33 is the trip unit designation, and W means it comes without terminals.

Is this a complete, ready to install breaker? No, it is the frame by itself. A working breaker also needs the matching trip unit and terminals, which are ordered separately.

What is an interrupting rating? It is the largest fault current the device can safely interrupt. Here it is 100 kAIC at 240 Vac and 65 kAIC at 480 Vac.

How heavy is it? Eaton publishes a product weight of 19.7 lb.

Is this a genuine Eaton part number? Yes, HLDB3600FT33W appears as an Eaton catalog number in the Eaton Volume 4 circuit protection catalog and on Eaton's own product page.