1sna399749r2600 – d2,5/8,ado,nf1

Why Choose the TE Connectivity D2.5/8.ADO.NF1 Railway Feed-Through Terminal Block?

The TE Connectivity 1SNA399749R2600, also identified as D2.5/8.ADO.NF1, is a beige ADO System IDC feed-through terminal block developed for railway and rolling-stock electrical applications. It combines compact DIN rail mounting with TE Connectivity's ADO insulation displacement technology to provide fast, secure and repeatable conductor termination in demanding environments.

Designed specifically for rolling stock exposed to vibration, shock and other severe operating constraints, the D2.5/8.ADO.NF1 uses ADO connections on both sides and supports up to two wires per connection. Black identification marking is provided to indicate the applicable wire size, helping installers maintain consistent wiring throughout railway terminal assemblies.

The terminal has an 8 mm spacing, an IEC rated current of 24 A and an IEC rated voltage of 1,000 V. Its ADO connection is specified for 1.5 mm² flexible conductor without ferrule under applicable railway conductor standards, making it a dependable solution for rolling-stock control and electrical distribution circuits.

Key Advantages

• Purpose-designed railway feed-through terminal block for rolling-stock electrical systems.
• ADO insulation displacement technology provides fast and dependable conductor termination.
• Designed to withstand demanding environments involving vibration and mechanical shock.
• Supports up to two wires per connection.
• 24 A IEC rated current and 1,000 V IEC rated voltage.
• Compact 8 mm spacing supports organised railway terminal assemblies.

Key Features

• TE Connectivity / Entrelec Railway ADO terminal block.
• D2.5/8.ADO.NF1 feed-through configuration.
• ADO insulation displacement connections on both sides.
• Designed for 1.5 mm² flexible conductor without ferrule under applicable railway conductor specifications.
• 24 A IEC rated current.
• 1,000 V IEC rated voltage.
• 8,000 V rated impulse withstand voltage.
• 180 A short-time withstand current for 1 s.
• Black marking for conductor-size identification.
• Beige thermoplastic insulating body with V0 flammability classification.

Reliable ADO Connections for Railway Applications

Rolling-stock electrical connections must remain dependable despite continuous vibration, mechanical shock and demanding operating conditions. The D2.5/8.ADO.NF1 is designed for these environments and uses the TE Connectivity ADO System to provide a secure insulation displacement connection for compatible flexible railway conductors without requiring conventional screw clamping.

Its feed-through configuration provides a straightforward electrical path between conductors, while the 8 mm terminal spacing supports organised DIN rail assemblies. With IEC ratings of 24 A and 1,000 V, plus a short-time withstand current of 180 A for 1 s, the D2.5/8.ADO.NF1 is well suited to professional railway control, auxiliary and electrical distribution systems.

Typical Applications

• Railway rolling-stock electrical systems.
• Train control and auxiliary electrical panels.
• Rail vehicle equipment cabinets.
• Rolling-stock control and distribution circuits.
• On-board automation and signalling equipment.
• Electrical installations exposed to vibration and mechanical shock.