TE Connectivity 1SNA115666R2600 M4/8.SFDT1 is an 8 mm wide screw-clamp fuse terminal block for 5 × 20 mm and 5 × 25 mm fuses, with blown-fuse indication and built-in test sockets, rated at 6.3 A and 400 V IEC.
£16.10
The TE Connectivity 1SNA115666R2600, also identified as M4/8.SFDT1, is an industrial screw-clamp fuse terminal block with blown-fuse indication designed to combine conductor termination and circuit protection within a compact DIN-rail assembly. Part of the established TE Connectivity / Entrelec SNA range, it is suitable for control, automation and signalling circuits where rapid identification of a failed fuse can simplify maintenance and troubleshooting.
The M4/8.SFDT1 accepts 5 × 20 mm and 5 × 25 mm fuses and incorporates a blown-fuse indicator to help technicians quickly locate a protected circuit in which the fuse has operated. Built-in test sockets further support commissioning and diagnostic work, while the fuse itself is not supplied with the terminal block.
With an IEC rated current of 6.3 A, rated voltage of 400 V and rated cross-section of 4 mm², the 1SNA115666R2600 provides dependable protection for industrial electrical circuits. Its compact 8 mm width and compatibility with G32, TH35-7.5 and TH35-15 DIN rails allow straightforward integration into densely populated control panels.
Fuse terminal blocks combine wiring termination and overcurrent protection in a single modular component, reducing the number of separate devices required inside an electrical panel. The M4/8.SFDT1 accepts standard cartridge fuses and incorporates a blown-fuse indicator, allowing a failed protected circuit to be identified quickly during inspection or fault finding.
Built-in test sockets make electrical testing easier without disturbing permanent field wiring, while screw-clamp connections provide secure conductor retention. Combined with its narrow 8 mm profile, IP20 construction and broad operating-temperature range, the 1SNA115666R2600 is well suited to industrial control and automation installations.
| Manufacturer | TE Connectivity / Entrelec |
|---|---|
| Series | SNA |
| Model | M4/8.SFDT1 |
| Manufacturer part number | 1SNA115666R2600 |
| Product type | Screw-clamp fuse terminal block |
| Function | Fuse protection with blown-fuse indication |
| Fuse compatibility | 5 × 20 mm and 5 × 25 mm |
| Fuse supplied | No |
| Number of levels | 1 |
| Connection type | Screw clamp |
| Rated current | 6.3 A |
| Rated voltage | 400 V |
| Rated impulse withstand voltage | 4000 V |
| Rated cross-section | 4 mm² |
| Flexible conductor capacity | 0.5–4 mm² |
| Rigid conductor capacity | 0.5–6 mm² |
| UL/CSA rigid conductor capacity | 22–12 AWG |
| Maximum operating voltage UL/CSA | 600 V |
| Wire stripping length | 9.5 mm |
| Tightening torque | 0.5 N·m to IEC 60947-1 |
| Manufacturer tightening torque | 0.8 N·m |
| Mounting type | DIN rail |
| Compatible DIN rails | G32, TH35-7.5, TH35-15 |
| Width | 8 mm |
| Height | 56.5 mm |
| Depth | 41 mm |
| Product spacing | 8 mm |
| Insulation material | Polyamide |
| Colour | Grey |
| Protection rating | IP20 at main terminals |
| Flammability rating | UL 94 V-0 |
| Pollution degree | 3 |
| Operating temperature | -55 to +110 °C |
| Storage temperature | -55 to +110 °C |
| Weight | approximately 14 g |
| EAN | 3472591156669 |
The 1SNA115666R2600 is a fuse terminal block used to provide conductor termination and replaceable fuse protection for industrial control, automation and signalling circuits.
The M4/8.SFDT1 is designed for 5 × 20 mm and 5 × 25 mm cartridge fuses. The fuse is not supplied with the terminal block.
Yes. The terminal incorporates a blown-fuse indicator to help identify a defective or interrupted protected circuit quickly.
The terminal has an IEC rated current of 6.3 A, a rated voltage of 400 V and a rated impulse withstand voltage of 4 kV.
The terminal can be installed on G32, TH35-7.5 and TH35-15 DIN rails, providing flexibility for industrial panel and switchgear assemblies.
TE Connectivity and Entrelec SNA fuse terminal blocks provide dependable modular circuit protection for industrial automation and control-panel applications where secure screw-clamp termination, rapid fault identification and convenient electrical testing are required.
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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...