Overview
The Hoffman E3PBX pushbutton enclosure is an extra-deep pilot device housing engineered for industrial control panels and manual operation applications. Manufactured by nVent Hoffman (formerly Hoffman Enclosures), this enclosure accommodates 30.5 mm and 22.5 mm pushbuttons and switches while providing the additional internal depth required for auxiliary contact blocks. The extra-deep design makes it ideal for control systems requiring expanded contact configurations without increasing front-panel footprint.
Key Features
- Extra-Deep Design: 4.75 inches (121 mm) depth to accommodate additional pushbutton contact blocks
- Dual Pushbutton Compatibility: Designed to hold 30.5-mm and 22.5-mm pushbuttons and switches
- Heavy-Duty Steel Construction: 14 gage steel with gray polyester powder paint inside and out
- Sealed Enclosure: Captivated cover screws thread into sealed wells; oil-resistant gasket
- Welded Seams: Ground smooth continuously welded seams for maximum integrity
- Convenient Features: Internal detachable hinge to hold cover open during wiring; external welded-on mounting brackets for easy installation
Technical Specifications
The Hoffman E3PBX meets demanding industrial standards and is compatible with factory-stamped pushbutton hole patterns:
- UL 508A Listed; Type 12, 13; cUL Listed per CSA C22.2 No. 94
- Factory stamped 4-way pushbutton holes
- Grounding nut in body of enclosure; bonding provision on cover
- Gray polyester powder coat finish resists corrosion and fading in industrial environments
Typical Applications
The Hoffman E3PBX extra-deep pushbutton enclosure is commonly used in:
- Machine control panels and operator stations
- Process automation systems requiring multiple contact configurations
- Motor starter and VFD control enclosures
- Manual jog/emergency stop control stations
- Light tower and audible alarm control interfaces
- Industrial pump and conveyor management systems
Compatibility & Replacements
The Hoffman E3PBX is part of nVent’s PB1 Series pushbutton enclosure line. When integrating into existing control systems, verify your pushbutton hole count and diameter (30.5 mm or 22.5 mm) against your pilot device specifications. For applications requiring shallower enclosures, Hoffman offers standard-depth pushbutton boxes. The unit is also manufactured under nVent brand designation (formerly Hoffman Enclosures, now part of nVent Electrical). Original equipment manufacturers and system integrators should confirm mounting bracket orientation and grounding provisions for seamless panel retrofit applications.
