1sna399250r2600 – d4/8 p ado

Why Choose the TE Connectivity D4/8.P.ADO 1SNA399250R2600 Ground Terminal Block?

The TE Connectivity D4/8.P.ADO 1SNA399250R2600 is a robust ADO protective earth terminal block designed for reliable grounding connections in industrial control panels, switchgear, machinery and automation systems. Part of the established Entrelec SNA ADO terminal block range, it combines compact DIN-rail installation with fast insulation-displacement conductor termination.

Designed for 4 mm² copper conductors, the D4/8.P.ADO features ADO connections on both sides and provides two clamping positions on a single level. The ADO insulation-displacement connection system enables efficient conductor termination while maintaining consistent electrical contact, making the terminal well suited to repetitive panel-building and industrial wiring applications.

The D4/8.P.ADO has a compact 8 mm width and green-yellow housing for immediate protective earth identification. Its screwless rail connection provides dependable grounding through a standard 35 mm DIN rail, while a short-time withstand current of 480 A for 1 s supports effective fault-current handling.

Key Advantages

• Purpose-designed protective earth terminal block for industrial grounding circuits.
• ADO-to-ADO insulation-displacement connections enable fast conductor termination.
• Designed specifically for 4 mm² copper conductors.
• 480 A short-time withstand current for 1 s supports protective earth applications.
• Compact 8 mm width helps optimise available DIN-rail space.
• Green-yellow housing provides clear identification of the protective earth connection.
• Screwless rail contact helps provide a consistent grounding connection without operator-dependent tightening torque.

Key Features

• TE Connectivity Entrelec D4/8.P.ADO ground terminal block.
• ADO / ADO insulation-displacement connection technology.
• 4 mm² conductor cross-section.
• Two clamping positions on one level.
• 8 mm terminal width.
• 480 A / 1 s short-time withstand current.
• IP20 protection at the main terminals.
• Green-yellow insulating body for protective earth identification.
• Thermoplastic insulating material with V0 flammability classification.
• Designed for mounting on a standard 35 mm DIN rail.
• Compact dimensions of approximately 50 × 8 × 41 mm.

Reliable ADO Grounding for Industrial Installations

Protective earth terminal blocks provide an essential connection between equipment grounding conductors and the grounded DIN rail. The D4/8.P.ADO incorporates a screwless rail contact, helping establish a dependable protective conductor path without relying on operator-applied screw torque at the rail connection.

The ADO insulation-displacement system enables compatible 4 mm² conductors to be terminated efficiently on both sides of the terminal. Combined with an 8 mm width and 480 A for 1 s short-time withstand capability, the D4/8.P.ADO provides a compact grounding solution for demanding industrial electrical assemblies.

Typical Applications

• Protective earth connections in industrial control panels.
• Machine-building and factory automation systems.
• Switchgear and electrical distribution assemblies.
• PLC and automation control cabinets.
• Industrial equipment grounding circuits.
• DIN-rail electrical installations using ADO connection technology.