Overview
The Ferraz Shawmut 67633 is an intermediate-class power distribution block engineered for industrial power splitting and cable management. This 3-pole unit provides copper-rated capacity of 310A at 600VAC, making it suitable for control panels, switchboards, and fixed junction tap-off applications where safe, accessible power distribution is critical. The block supports both single and dual conductor primary inputs with multiple secondary output connections, simplifying complex wiring schemes while maintaining code compliance.
Key Features
- 3-Pole Configuration: Accommodates three independent power circuits with proper isolation and spacing.
- 310A Copper Capacity: Handles high-amperage secondary distribution without thermal degradation.
- UL/CSA Rated: Meets UL508A and National Electrical Code (NEC) spacing requirements for feeder and branch circuits.
- Polycarbonate Construction: Glass-filled insulators provide durability and electrical isolation; optional hinged safety covers available.
- Tin-Plated Connectors: Copper connectors with TiN plating ensure low-resistance contact and corrosion resistance.
- 100 kA Short Circuit Rating: Withstands high fault currents when protected with properly sized fuses.
Technical Specifications
- Voltage Rating: 600 VAC (1000 VAC/1000 VDC available on alternate models)
- Amperage (Copper): 310A
- Number of Poles: 3
- Conductor Range: 6 AWG to 350 kcmil
- Primary Connections: 1 per pole (single or dual conductor capable)
- Secondary Connections: Up to 6 per pole (up to 30 total secondary outputs)
- Short Circuit Rating: 100 kA (with correctly sized fuses)
- Material: Copper connectors, polycarbonate insulators, tin-plated
- Dimensions: 3.25 in (H) × 5.28 in (W) × 5 in (D)
- Safety Features: Polycarbonate safety covers (dead-front protection); see-through hinged covers optional
Typical Applications
Power distribution blocks of this class are commonly deployed in:
- Industrial control panels and motor control centers (MCCs)
- Primary-to-secondary feeder splicing in switchboards
- Fixed junction tap-off points for branch circuit distribution
- Manufacturing facility electrical distribution systems
- OEM machinery and automation integration
- Facility upgrades and panel retrofits requiring code-compliant connections
Compatibility & Replacements
Compatible With
- Standard industrial 480V, 277V, and 600VAC power systems
- UL508A-compliant control panels and enclosures
- National Electrical Code (NEC) feeder and branch circuit layouts
- Ferraz Shawmut fuse holders and safety disconnects
- Standard copper and aluminum conductor cable assemblies (6 AWG–350 kcmil)
Replaces / Drop-In Replacement For
- Mersen MPDB67633 (equivalent designation; Ferraz Shawmut was acquired by Mersen)
- Other intermediate 3-pole PDBs within the 66000–67000 series range
Works With
- Ferraz Shawmut fuse elements and holders (100 kA rated)
- End barriers and optional safety covers for expanded configurations
- Standard electrical service entrance and distribution systems
