TE Connectivity M4/8.SFD 1SNA115663R2300 is a grey ENTRELEC SNA fused DIN rail terminal block with screw termination, a 6.3 A 400 V IEC rating and support for 5 × 20 mm and 5 × 25 mm cartridge fuses.
£12.13
The TE Connectivity M4/8.SFD 1SNA115663R2300 is a grey fused DIN rail terminal block designed to combine secure conductor termination with convenient circuit protection in industrial control panels, machinery and automation systems. Part of the established TE Connectivity ENTRELEC SNA series, it provides a compact and serviceable solution for protected electrical and control circuits.
This terminal block uses a reliable screw connection and incorporates a lever-operated fuse disconnect arrangement. It accepts commonly used 5 × 20 mm and 5 × 25 mm fuses, allowing circuit protection to be integrated directly into the terminal strip while enabling straightforward fuse inspection and replacement.
Rated at 6.3 A and 400 V IEC, the 1SNA115663R2300 supports conductor sizes from 0.5–6 mm² and 12–22 AWG. Its compact 8 mm terminal width, polyamide insulation and UL 94 V-0 flammability classification make it well suited to professional industrial panel building and machine wiring applications.
Fused terminal blocks allow overcurrent protection to be incorporated directly into a DIN rail terminal assembly. The TE Connectivity M4/8.SFD provides an organised method of protecting individual circuits while maintaining easy access to the fuse during commissioning, fault finding and routine maintenance.
Its screw-clamp connections provide secure conductor retention, while the lever-operated fuse disconnect makes circuit isolation practical without disturbing adjacent wiring. This combination makes the 1SNA115663R2300 particularly useful in control cabinets where reliable circuit protection and compact panel layouts are required.
| Manufacturer | TE Connectivity |
|---|---|
| Series | ENTRELEC SNA |
| Model | M4/8.SFD |
| Part number | 1SNA115663R2300 |
| Product type | Fused DIN rail terminal block |
| Colour | Grey |
| Terminal function | Fuse disconnect |
| Number of positions | 2 |
| Number of levels | 1 |
| Termination method | Screw |
| Disconnect type | Fuse / lever |
| Nominal conductor cross-section | 4 mm² |
| Conductor range | 0.5–6 mm² |
| Wire size | 12–22 AWG |
| IEC rated current | 6.3 A |
| IEC rated voltage | 400 V |
| UL rated voltage | 600 V |
| Fuse sizes | 5 × 20 mm / 5 × 25 mm |
| Terminal width | 8 mm |
| Wire stripping length | 9.5 mm |
| Insulation material | Polyamide |
| Flammability rating | UL 94 V-0 |
It is a fused DIN rail terminal block used to connect conductors while providing integrated fuse protection for industrial control, automation and machine wiring circuits.
The terminal block is rated at 6.3 A and 400 V under IEC specifications, with a UL voltage rating of 600 V.
The terminal accepts 5 × 20 mm and 5 × 25 mm fuses, making it suitable for commonly used cartridge fuse formats.
The 1SNA115663R2300 accepts conductors from approximately 0.5–6 mm², equivalent to a wire range of 12–22 AWG.
The terminal has a compact width of 8 mm, helping maximise available DIN rail space in densely populated electrical panels.
TE Connectivity ENTRELEC SNA fused terminal blocks provide dependable screw-clamp wiring, integrated fuse protection and compact DIN rail installation for professional industrial control and automation systems.
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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...