TE Connectivity D4/8.SF.I.ADO 1SNA399785R0300 is an 8 mm DIN rail fuse terminal block for 5 × 20 mm and 5 × 25 mm cartridge fuses, combining ADO System and screw-clamp connections with an integrated 2 mm test socket.
£6.37
The TE Connectivity D4/8.SF.I.ADO 1SNA399785R0300 is a compact DIN rail fuse terminal block designed to provide circuit protection and dependable conductor termination in industrial control panels, machinery and automation systems. Part of the established Entrelec ADO System® terminal block range, it combines an ADO insulation-displacement connection with a conventional screw clamp for flexible and efficient panel wiring.
Designed to accept 5 × 20 mm and 5 × 25 mm cartridge fuses, the D4/8.SF.I.ADO allows a fuse to be integrated directly into the terminal strip, reducing the need for separate fuse holders. The fuse is not supplied with the terminal block. A built-in 2 mm test socket on the ADO side provides convenient access for measurement, commissioning and troubleshooting.
With an 8 mm terminal spacing and a rated cross-section of 1.5 mm² on the ADO connection, the 1SNA399785R0300 provides a compact solution for protected circuits. Its grey thermoplastic housing, DIN rail mounting and combination of ADO and screw-clamp technologies make it well suited to professional industrial panel construction.
Fuse terminal blocks combine conductor termination and overcurrent protection in a single DIN rail component. By accommodating standard 5 × 20 mm and 5 × 25 mm cartridge fuses, the D4/8.SF.I.ADO allows individual circuits to be protected directly within the terminal strip while keeping panel layouts compact and organised.
The hybrid connection arrangement combines the rapid, consistent termination characteristics of the ADO System® with a conventional screw clamp. Together with the integrated 2 mm test socket, this makes the terminal particularly practical for panel assembly, commissioning, routine measurement and electrical fault finding.
| Manufacturer | TE Connectivity |
|---|---|
| Brand / range | Entrelec ADO System® |
| Model | D4/8.SF.I.ADO |
| Manufacturer part number | 1SNA399785R0300 |
| Product type | Fuse terminal block |
| Function | Fused circuit connection and protection |
| Connection technology | ADO System® / screw clamp |
| Fuse size | 5 × 20 mm / 5 × 25 mm |
| Fuse supplied | No |
| Test connection | 2 mm diameter test socket on ADO side |
| ADO rated cross-section | 1.5 mm² |
| Rated current | 6.3 A |
| Rated voltage | 630 V |
| Spacing / width | 8 mm |
| Number of levels | 1 |
| Protection rating | IP20 at main terminals |
| Colour | Grey |
| Insulating material | Thermoplastic |
| Flammability rating | UL94 V-0 |
| Operating temperature | -55 to +110 °C |
| DIN rail compatibility | TH35-7.5 and TH35-15 |
| Dimensions (W × H × D) | 8 × 68.2 × 40.9 mm |
| Product net weight | 13 g |
| Pack quantity | 50 pieces |
| EAN | 3472593997857 |
The D4/8.SF.I.ADO is a DIN rail fuse terminal block used to combine conductor termination and cartridge-fuse circuit protection within industrial electrical panels.
The terminal block is designed for 5 × 20 mm and 5 × 25 mm cartridge fuses. The fuse itself is not supplied with the terminal block.
It combines TE Connectivity ADO System® insulation-displacement technology on one side with a conventional screw-clamp connection on the other.
Yes. The terminal includes a 2 mm diameter test socket on the ADO side, providing convenient access for electrical measurement and diagnostics.
The terminal mounts on standard TH35-7.5 and TH35-15 DIN rails and is suitable for industrial control panels, machinery, automation systems and fused auxiliary circuits.
TE Connectivity Entrelec ADO System® terminal blocks provide industrial panel builders and automation engineers with efficient conductor termination, modular circuit protection and convenient testing facilities for dependable control-panel wiring.
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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...