1sna146306r0500 – d300/55.ff.ex

Why Choose the TE Connectivity 1SNA146306R0500 D300/55.FF.Ex Power Terminal Block?

The TE Connectivity 1SNA146306R0500, also known as the D300/55.FF.Ex, is a heavy-duty 300 mm² feed-through power terminal block designed for high-current conductor connections in industrial power distribution, switchgear, control panels and appropriately engineered hazardous-area installations. As part of the established ENTRELEC SNA terminal block series, it provides robust stud-to-stud termination for demanding industrial power applications.

The D300/55.FF.Ex uses heavy-duty stud connections on both sides to provide secure mechanical and electrical termination of large power conductors and suitable cable lugs. Its high conductor capacity, substantial short-time withstand performance and durable polyamide construction make it particularly suitable for industrial distribution systems where reliable high-current connections are essential.

With a 300 mm² rated cross-section and a 520 A rated current, the D300/55.FF.Ex accommodates rigid conductors from 6–300 mm². Its 55 mm terminal spacing provides room for large conductors, while compatibility with TH35-7.5 and TH35-15 DIN rails provides installation flexibility in industrial electrical assemblies.

Key Advantages

• Heavy-duty 300 mm² feed-through power terminal block for industrial power systems.
• 520 A rated current for demanding high-current electrical connections.
• Robust stud-to-stud connection technology for secure termination of large conductors.
• Accepts rigid conductors from 6–300 mm².
• High 36 kA short-time withstand current for 1 s.
• 55 mm terminal spacing provides suitable clearance for high-power conductor connections.
• DIN rail or base mounting options provide flexibility for industrial panel construction.

Key Features

• TE Connectivity / ENTRELEC SNA D300/55.FF.Ex.
• Feed-through power terminal block.
• 300 mm² rated cross-section.
• 520 A rated current.
• 36,000 A short-time withstand current for 1 s.
• Heavy-duty stud connection for high-current conductor termination.
• 6–300 mm² rigid conductor capacity.
• Rated cross-section equivalent up to 1000 kcmil.
• 55 mm terminal spacing.
• Single-level feed-through configuration.
• Grey polyamide insulating housing.
• Compatible with protective covers for enhanced touch protection.
• DIN rail or base mounting for flexible panel installation.

Reliable High-Current Connections for Industrial Power Systems

High-current power terminal blocks provide a secure and organised method of connecting large conductors within industrial electrical distribution systems. The D300/55.FF.Ex uses robust stud connections to accommodate suitably terminated conductors and cable lugs, providing dependable electrical continuity in installations carrying substantial currents.

The combination of a 300 mm² rated cross-section, 520 A current rating and 36 kA short-time withstand capability makes this terminal particularly suitable for heavy-duty power distribution. Its DIN rail and base mounting options also give panel builders flexibility when integrating large power connections into switchgear, distribution cabinets and industrial control assemblies.

Typical Applications

• Industrial power distribution panels.
• Switchgear and electrical distribution assemblies.
• High-current machinery and automation systems.
• Motor control centres and industrial power cabinets.
• Process plant power distribution systems.
• Appropriately engineered hazardous-area electrical installations.