TE Connectivity D2.5/5.I.P.4L 1SNA399073R0400 is a 2.5 mm² green-yellow protective earth terminal block with four spring-clamp connections, a 5 mm pitch and screwless DIN rail grounding for industrial control panels.
£6.49
The TE Connectivity D2.5/5.I.P.4L, part number 1SNA399073R0400, is a compact spring-clamp protective earth terminal block with four connections designed for reliable grounding in industrial control panels, machinery and electrical distribution assemblies. Part of the established Entrelec SNA terminal block range, it combines space-efficient 5 mm pitch construction with a screwless rail connection for dependable protective conductor termination.
The terminal block features a green-yellow housing for immediate protective earth identification and uses spring-clamp conductor connections to provide fast, consistent wiring without conventional terminal screws. Its screwless connection to the DIN rail helps provide a secure earth path while reducing installation dependence on operator-applied tightening torque.
With a rated cross-section of 2.5 mm², four connection points and support for rigid conductors from 0.12–4 mm², the D2.5/5.I.P.4L is well suited to compact industrial wiring systems. It mounts on standard TH 35-7.5 and TH 35-15 DIN rails and provides IP20 protection at the terminals.
Protective earth terminal blocks provide a controlled connection between equipment grounding conductors and the metal DIN rail, helping maintain electrical safety in control panels and machinery. The D2.5/5.I.P.4L uses a screwless rail-contact system that establishes the ground connection when the terminal is securely mounted on a compatible DIN rail.
Its four spring-clamp connections allow several protective conductors to be terminated within a compact 5 mm footprint. Spring technology maintains consistent conductor contact without routine screw tightening, making this terminal particularly useful in high-density industrial assemblies where fast installation and dependable long-term connections are required.
| Manufacturer | TE Connectivity / Entrelec |
|---|---|
| Series | SNA |
| Model | D2.5/5.I.P.4L |
| Manufacturer part number | 1SNA399073R0400 |
| Product type | Protective earth / ground terminal block |
| Connection technology | Spring clamp |
| Number of connections | 4 |
| Rated cross-section | 2.5 mm² |
| Pitch | 5 mm |
| Rigid conductor capacity | 0.12–4 mm² |
| Flexible conductor capacity | 0.12–2.5 mm² |
| Flexible conductor with insulated ferrule | 0.5–1.5 mm² |
| UL conductor range | 26–12 AWG |
| CSA conductor range | 26–14 AWG |
| Rated short-time withstand current | 300 A for 1 s |
| Protection rating | IP20 |
| Colour | Green-yellow |
| DIN rail compatibility | TH 35-7.5 / TH 35-15 |
| Wire stripping length | 9.5 mm |
| Dimensions (H × W × D) | 55 × 5 × 41.5 mm |
| Operating temperature | -55 to +110 °C |
| Storage temperature | -55 to +110 °C |
| Net weight | approx. 12 g |
| Pack quantity | 50 pieces |
| Barcode | 3472593990735 |
The D2.5/5.I.P.4L is a protective earth terminal block used to connect grounding conductors to a DIN rail in industrial electrical panels, machinery and automation systems.
The terminal block provides four spring-clamp conductor connections, allowing multiple protective earth conductors to be terminated in a compact footprint.
The terminal accepts rigid conductors from 0.12–4 mm² and flexible conductors from 0.12–2.5 mm².
The terminal block is designed for mounting on standard TH 35-7.5 and TH 35-15 DIN rails.
The terminal block has a compact pitch of 5 mm, making it suitable for high-density panel wiring applications.
The green-yellow colour identifies the terminal as a protective earth connection, helping distinguish grounding conductors from other circuit connections within an electrical assembly.
TE Connectivity / Entrelec SNA terminal blocks are widely used in industrial control, machinery and electrical distribution applications where compact installation, dependable conductor termination and clearly identified protective earth connections are essential.
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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...