Overview
The Hoffman E3PBX pushbutton enclosure is an industrial-grade, extra-deep steel enclosure specifically designed for mounting 30.5 mm and 22.5 mm pushbuttons and selector switches. The enclosure features a depth of 4.75 inches (121 mm) to accommodate additional pushbutton contact blocks, making it ideal for multi-button control stations requiring complex switching logic. The E series construction uses 14 gauge steel with gray polyester powder paint inside and out, delivering durability in harsh industrial environments.
Key Features
- Designed to hold 30.5 mm and 22.5 mm pushbuttons and switches, with added depth to accommodate additional pushbutton contact blocks
- Ground smooth continuously welded seams for durability and appearance
- Captivated cover screws thread into sealed wells; grounding nut in body; bonding provision on cover
- Oil-resistant gasket and factory-stamped 4-way pushbutton holes
- UL 508A Listed; cUL Listed per CSA C22.2 No. 94; Type 12, 13
- External welded-on mounting brackets for easy installation
Technical Specifications
- Pushbutton Size: 30.5 mm and 22.5 mm compatible
- Dimensions: 8 in. (Height) × 4 in. (Width) × 4.75 in. (Depth)
- Material: 14 gauge steel with gray polyester powder paint
- NEMA Rating: Type 12, 13 (UL 508A and cUL Listed)
- Cover Type: Screw, hinged with internal detachable hinge
- Mounting: Wall mount, surface mount
- Finish: Gray polyester powder coat, painted inside and out
- Hole Configuration: Factory-stamped 4-way pushbutton holes (3-hole layout)
- Gasket: Oil-resistant
- Quantity: Box of 2 enclosures
Typical Applications
The Hoffman E3PBX enclosure is commonly deployed in:
- Industrial control panels requiring multiple pushbuttons with signal integration blocks
- Manufacturing machinery start/stop and emergency stop (E-stop) control stations
- Process automation equipment with multi-function pushbutton arrays
- Pilot device protection in NEMA 12 and 13 indoor rated environments
- OEM equipment requiring extra depth for contact block stacking
Compatibility & Replacements
The E3PBX is part of Hoffman’s E Series extra-deep pushbutton enclosures and is manufactured by nVent Hoffman (formerly Pentair Hoffman). The model accepts standard 30.5 mm (NEMA standard) pushbutton devices and 22.5 mm compact pushbuttons. This enclosure is a direct replacement for existing E3PBX units and pairs well with standard Hoffman pilot device components including indicator lights, selector switches, and pushbutton contact blocks. Confirm mounting hole spacing and contact block depth requirements before installation.
