NVENT HOFFMAN PWB03 Power distribution box, 3U

Why Choose the nVent HOFFMAN PWB03 3U Power Distribution Box?

The nVent HOFFMAN PWB03 is a 3U 19-inch power distribution box designed for installing circuit breakers, switches and sockets within electrical and electronic equipment racks. By housing power switching equipment in a dedicated enclosure, the PWB03 helps segregate these components from other equipment installed within the cabinet and reduces the potential for unwanted interference.

The PWB03 provides an opening for up to 22 modules of 18 mm and incorporates a DIN rail that can be adjusted in depth by 15 mm. Two integrated 10 mm x 8 mm earthing rails are provided, each measuring 120 mm long and offering 15 M5 connection points, supporting organised protective earth connections within the distribution assembly.

Manufactured from 1.5 mm mild steel with a light grey RAL 7035 powder-coated finish, the PWB03 mounts directly onto standard 19-inch profiles at the required position. A large rear 400 mm x 35 mm cable entry fitted with a cable brush provides a practical route for incoming and outgoing wiring while helping maintain an organised rack installation.

Key Advantages

• Provides a dedicated 3U power distribution enclosure for 19-inch rack systems.
• Accommodates circuit breakers, switches or sockets with an opening for up to 22 x 18 mm modules.
• Helps segregate power switching equipment from other rack-mounted components.
• 15 mm depth-adjustable DIN rail provides installation flexibility.
• Two integrated earthing rails support organised protective earth connections.
• Rear cable entry with cable brush simplifies routing and organisation of electrical wiring.

Key Features

• nVent HOFFMAN PWB Series power distribution box.
• 3U rack height.
• Designed for installation on 19-inch mounting profiles.
• Opening accommodates up to 22 modules at 18 mm each.
• DIN rail adjustable in depth by 15 mm.
• Two 10 mm x 8 mm earthing rails.
• Each earthing rail is 120 mm long.
• Each earthing rail provides 15 M5 connections.
• Rear 400 mm x 35 mm cable entry.
• Cable entry supplied with an integrated cable brush.
• Manufactured from 1.5 mm mild steel.
• Light grey RAL 7035 powder-coated finish.

Organised Power Distribution Within 19-Inch Enclosures

Separating power switching devices from other equipment within a rack can improve organisation and help avoid unwanted interaction with neighbouring components. The nVent HOFFMAN PWB03 provides a dedicated enclosure for circuit breakers, switches and sockets, allowing the power distribution equipment to be positioned on the 19-inch profiles where it is most appropriate for the installation.

The combination of a depth-adjustable DIN rail, twin earthing rails and a brushed rear cable opening makes the PWB03 particularly practical for professional enclosure builds. Its 3U format provides capacity for up to 22 modular devices while retaining compatibility with standard 19-inch rack infrastructure.

Typical Applications

• 19-inch electrical and electronic equipment racks.
• Industrial control and automation cabinets.
• Circuit breaker distribution assemblies.
• Rack-mounted switches and socket installations.
• Data and telecommunications enclosures requiring segregated power distribution.
• Machine control cabinet power distribution.
• Industrial enclosure and system integration projects.