TE Connectivity 1SNA399244R1400 D4/8.ADO is an 8 mm pitch ADO System feed-through terminal block rated at 32 A and 1,000 V for reliable 4 mm² industrial control-panel connections.
£2.67
The TE Connectivity 1SNA399244R1400, also identified as D4/8.ADO, is a robust ADO System feed-through terminal block designed for dependable conductor connections in industrial control panels, machinery and automation systems. Part of the established Entrelec ADO terminal block range, it combines compact DIN rail installation with insulation displacement connection technology for fast and reliable wiring.
The D4/8.ADO uses ADO connections on both sides, providing a secure conductor interface particularly suited to demanding control applications where vibration, shock and environmental stresses can affect conventional connections. The feed-through configuration provides a straightforward electrical connection between incoming and outgoing conductors while helping panel builders achieve organised, high-density wiring.
Designed for a nominal conductor cross-section of 4 mm², the D4/8.ADO has a rated current of 32 A and rated voltage of 1,000 V. Its compact 8 mm pitch, grey polyamide housing and compatibility with standard 35 mm DIN rail make it a practical solution for industrial electrical distribution and control applications.
Feed-through terminal blocks provide a secure electrical path between incoming and outgoing conductors while keeping control-panel wiring structured and accessible. The D4/8.ADO combines this fundamental function with Entrelec ADO insulation displacement technology, providing a fast and consistent connection method for professional industrial wiring.
The ADO System is particularly suited to control applications exposed to demanding operating conditions such as vibration, shock and corrosion. Together with its polyamide housing, IP20 protection and standard DIN rail mounting, the D4/8.ADO provides a durable connection solution for machine builders, panel manufacturers and industrial maintenance engineers.
| Manufacturer | TE Connectivity / Entrelec |
|---|---|
| Series | ADO System |
| Model | D4/8.ADO |
| Manufacturer part number | 1SNA399244R1400 |
| Product type | Feed-through terminal block |
| Function | Feed-through |
| Connection technology | ADO System |
| Connection configuration | ADO / ADO |
| Rated voltage | 1,000 V |
| Rated current | 32 A |
| Rated impulse withstand voltage | 8,000 V |
| Rated cross-section | 4 mm² |
| UL/CSA conductor capacity | 12 AWG stranded |
| Rated short-time withstand current | 480 A for 1 s |
| Dielectric test voltage | 3,500 V |
| Number of levels | 1 |
| Pitch | 8 mm |
| Colour | Grey |
| Insulation material | Polyamide |
| Flammability classification | UL94 V0 |
| Pollution degree | 3 |
| Protection rating | IP20 |
| Mounting | TH35-7.5 / TH35-15 DIN rail |
| Operating temperature | -55 to +110 °C |
| Dimensions (W × H × D) | 8 × 55 × 41 mm |
| Product net weight | 9 g |
| Pack quantity | 50 pieces |
| EAN | 3472593992449 |
The D4/8.ADO is a feed-through terminal block used to create reliable conductor-to-conductor connections in industrial control panels, machinery, switchgear and automation systems.
The terminal block has a rated current of 32 A and a rated voltage of 1,000 V, with an 8,000 V rated impulse withstand voltage.
The D4/8.ADO has a nominal rated conductor cross-section of 4 mm² and is specified for 12 AWG stranded conductors under UL/CSA data.
It uses the Entrelec ADO System insulation displacement connection on both sides of the terminal, providing an ADO-to-ADO feed-through connection.
The terminal block mounts on standard 35 mm DIN rail, including TH35-7.5 and TH35-15 rail profiles commonly used in industrial electrical panels.
TE Connectivity / Entrelec ADO terminal blocks provide panel builders, machine manufacturers and automation engineers with compact, dependable connection technology engineered for reliable industrial control and electrical distribution applications.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...