TE Connectivity 1SNA399030R0500 D2.5/5 P ADO is a 5 mm green/yellow DIN rail ground terminal block combining ADO System screwless technology with a conventional screw-clamp connection.
£5.45
The TE Connectivity 1SNA399030R0500, also identified as D2.5/5 P ADO, is a compact DIN rail ground terminal block designed for protective-earth connections in industrial control panels, machinery and electrical distribution systems. Part of the established Entrelec SNA terminal block range, it combines ADO System® connection technology with a conventional screw clamp for dependable and space-efficient wiring.
The D2.5/5 P ADO uses a screwless, non-operator-dependent contact to the DIN rail, helping provide a consistent protective-earth connection while simplifying installation. Its hybrid ADO/screw arrangement gives panel builders the benefits of rapid connection technology alongside the familiarity and flexibility of a standard screw clamp.
With a compact 5 mm terminal spacing, green/yellow protective-earth identification and compatibility with TH35-7.5 and TH35-15 DIN rails, the 1SNA399030R0500 is well suited to densely populated industrial enclosures where reliable earthing and efficient use of panel space are essential.
Protective-earth terminal blocks provide a dedicated low-impedance path between connected conductors and the grounded DIN rail. The TE Connectivity D2.5/5 P ADO is designed to make this connection dependable while reducing the effect of installation technique through its screwless rail contact.
Its combination of ADO System® technology and a conventional screw clamp makes it particularly useful for control-panel builders who require compact wiring, secure protective-earth continuity and compatibility with commonly used DIN rail infrastructure.
| Manufacturer | TE Connectivity |
|---|---|
| Brand / range | Entrelec SNA |
| Model | D2.5/5 P ADO |
| Manufacturer part number | 1SNA399030R0500 |
| Product type | Ground / protective-earth DIN rail terminal block |
| Connection technology | ADO System® / screw clamp |
| Colour | Green / yellow |
| Terminal spacing | 5 mm |
| Flexible conductor range | 0.22–1 mm² |
| Rigid conductor range | 0.2–4 mm² |
| Wire stripping length | 9.5 mm |
| DIN rail compatibility | TH35-7.5 and TH35-15 |
| Protection rating | IP20 |
| IEC tightening torque | 0.4 N·m |
| Manufacturer maximum tightening torque | 0.6 N·m |
| Short-time withstand current | 120 A for 1 s |
| Dimensions (W × H × D) | approximately 5 × 50 × 41 mm |
| Weight | approximately 9 g |
The 1SNA399030R0500 is a protective-earth DIN rail terminal block used to connect grounding conductors securely to the DIN rail in industrial electrical panels.
It combines ADO System® screwless connection technology with a conventional screw clamp, providing both rapid connection and flexible field wiring.
The terminal supports flexible conductors from approximately 0.22–1 mm² and rigid conductors from 0.2–4 mm² on the applicable connection points.
The D2.5/5 P ADO is designed for mounting on TH35-7.5 and TH35-15 DIN rails in accordance with IEC 60715.
The green/yellow colour coding identifies the terminal as a protective-earth or grounding connection in industrial electrical installations.
TE Connectivity Entrelec SNA terminal blocks are widely used in industrial control and automation systems where compact installation, reliable electrical connections and dependable protective-earth continuity are essential.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...