TE Connectivity 1SNA115657R2500 M4/8.SF is an 8 mm grey screw-clamp fuse terminal block rated at 6.3 A and 630 V IEC for protected industrial signal and automation circuits.
£4.35
The TE Connectivity 1SNA115657R2500, also identified as M4/8.SF, is a compact screw-clamp fuse terminal block from the ENTRELEC SNA range. Designed for industrial signal circuits, control panels and automation equipment, it combines secure conductor termination with an accessible fuse function for convenient circuit protection and maintenance.
The M4/8.SF provides two connection positions on a single level and uses proven screw-terminal technology for dependable electrical connections. Its lever-type disconnect arrangement provides convenient access to the fuse circuit, helping simplify inspection, troubleshooting and servicing without compromising the organisation of the terminal assembly.
With an IEC rating of 6.3 A at 630 V, an 8 mm width and support for conductors up to 4 mm² nominal / 12 AWG, the 1SNA115657R2500 is well suited to compact industrial control cabinets. It mounts on G32, TH 35-7.5 or TH 35-15 DIN rails and features a robust grey polyamide 6.6 housing.
Fuse terminal blocks combine conductor termination and overcurrent protection within a modular DIN rail assembly. This allows individual circuits to be protected at the terminal level while keeping fuse access convenient for inspection, replacement and electrical troubleshooting.
The M4/8.SF is specifically configured for signal applications and combines its fuse function with robust screw-clamp termination. Its compact construction, broad DIN rail compatibility and industrial temperature range make it suitable for dependable integration into machinery and automation control systems.
| Manufacturer | TE Connectivity / ENTRELEC |
|---|---|
| Series | ENTRELEC SNA |
| Model | M4/8.SF |
| Manufacturer part number | 1SNA115657R2500 |
| Product type | Screw-clamp fuse terminal block |
| Block function | Fuse |
| Circuit application | Signal |
| 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 | 630 V |
| UL rated current | 15 A |
| CSA rated current | 10 A |
| CSA rated voltage | 250 V |
| Maximum UL / CSA main-circuit operating voltage | 600 V |
| IEC impulse withstand voltage | 8000 V |
| Nominal conductor size | 4 mm² / 12 AWG |
| Rigid stranded conductor capacity | 0.5–6 mm² |
| Flexible conductor capacity | 0.5–4 mm² |
| Wire stripping length | 9.5 mm |
| Tightening torque | 0.5 Nm |
| 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 |
| Operating temperature | -55 to +110 °C |
| DIN rail mounting | G32 / TH 35-7.5 / TH 35-15 |
The 1SNA115657R2500 is an M4/8.SF screw-clamp fuse terminal block from the ENTRELEC SNA range, designed for protected signal wiring in industrial control and automation systems.
The M4/8.SF has an IEC rated current of 6.3 A and an IEC rated voltage of 630 V.
The terminal has a nominal conductor size of 4 mm² / 12 AWG, with specified capacity up to 6 mm² for rigid stranded conductors and 4 mm² for flexible conductors.
The TE Connectivity M4/8.SF has an IP20 protection rating and uses a polyamide 6.6 housing with a UL 94V-0 flammability rating.
The terminal block can be mounted on G32, TH 35-7.5 and TH 35-15 DIN rails, providing flexibility for industrial panel construction.
TE Connectivity’s ENTRELEC SNA terminal block range combines robust industrial connection technology with specialised functions such as fuse protection, helping panel builders create organised, serviceable and dependable control and automation wiring 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...