TE Connectivity 1SNA115935R0400 M4/8.SFD3 is an 8 mm screw-clamp fuse terminal block with fuse-failure indication, rated at 6.3 A and 400 V IEC for industrial signal and automation circuits.
£14.04
The TE Connectivity 1SNA115935R0400, also identified as M4/8.SFD3, is a compact screw-clamp fuse terminal block with fuse-failure indication from the ENTRELEC SNA range. Designed for industrial signal and control circuits, it combines secure conductor termination, fuse protection and convenient visual fault indication within a DIN rail-mounted terminal assembly.
The M4/8.SFD3 is designed for 5 × 20 mm and 5 × 25 mm fuses and incorporates an indicator for rapid identification of a failed fuse. This makes the terminal particularly useful in automation and control panels where quick fault diagnosis can reduce maintenance time and simplify troubleshooting.
With an IEC rated current of 6.3 A, rated voltage of 400 V and nominal conductor size of 4 mm², the 1SNA115935R0400 provides dependable circuit protection in a compact 8 mm-wide format. Its robust polyamide 6.6 housing, IP20 protection and compatibility with G32 and TH 35 DIN rails make it well suited to demanding industrial installations.
Fuse terminal blocks integrate overcurrent protection directly into a modular terminal assembly, allowing individual control and signal circuits to be protected without requiring separate panel-mounted fuse holders. When a fuse needs inspection or replacement, the lever disconnect arrangement provides convenient access while retaining the organised wiring layout.
The M4/8.SFD3 adds fuse-failure indication, allowing maintenance personnel to identify an affected circuit more quickly. This functionality is especially valuable in machinery and automation panels where reducing diagnostic and maintenance time helps improve equipment availability.
| Manufacturer | TE Connectivity / ENTRELEC |
|---|---|
| Series | ENTRELEC SNA |
| Model | M4/8.SFD3 |
| Manufacturer part number | 1SNA115935R0400 |
| Product type | Screw-clamp fuse terminal block |
| Block function | Fuse |
| Circuit application | Signal |
| Fuse sizes | 5 × 20 mm / 5 × 25 mm |
| Fuse indication | Fuse-failure indicator |
| Number of circuits | 1 |
| Number of poles | 2 |
| Number of positions | 2 |
| Number of levels | 1 |
| IEC rated current | 6.3 A |
| IEC rated voltage | 400 V |
| Impulse withstand voltage | 4000 V |
| Operating voltage | 400 V AC |
| Nominal wire size | 4 mm² |
| Rigid stranded conductor capacity | 0.5–6 mm² |
| Flexible conductor capacity | 0.5–4 mm² |
| Termination method | Screw terminal |
| Wire stripping length | 9.5 mm |
| Tightening torque | 0.5 N·m |
| Disconnect type | Lever |
| Width / spacing | 8 mm |
| Height | 56.5 mm |
| Depth | 41 mm |
| Weight | 14 g |
| Colour | Grey |
| Housing material | Polyamide 6.6 |
| Protection rating | IP20 |
| Flammability rating | UL 94V-0 |
| Installation temperature | -5 to +40 °C |
| Operating temperature | -55 to +110 °C |
| DIN rail mounting | G32 / TH 35-7.5 / TH 35-15 |
The 1SNA115935R0400 is an M4/8.SFD3 screw-clamp fuse terminal block from the ENTRELEC SNA range, designed to provide fused protection and fault indication for industrial signal circuits.
The M4/8.SFD3 is designed for 5 × 20 mm and 5 × 25 mm cartridge fuses.
The terminal block has an IEC rated current of 6.3 A, a rated voltage of 400 V and an impulse withstand rating of 4000 V.
It accepts rigid stranded conductors from 0.5–6 mm² and flexible conductors from 0.5–4 mm², with a nominal wire size of 4 mm².
The terminal block is suitable for mounting on G32, TH 35-7.5 and TH 35-15 DIN rails, providing flexible integration into industrial control-panel assemblies.
TE Connectivity’s ENTRELEC SNA fuse terminal blocks combine dependable screw-clamp connectivity with accessible circuit protection and diagnostic functions, helping panel builders create organised and serviceable industrial control and automation systems.
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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...