Mersen X331174 US223N UltraSafe 3-Pole + Neutral modular fuse holder for 22 x 58 mm cylindrical fuse-links, rated 125 A, 800 V AC UL and 1000 V DC UL with IP20 finger-safe protection.
£96.31
The Mersen X331174, catalogue number US223N, is a premium 3-Pole + Neutral modular fuse holder from the UltraSafe™ US22 series. Designed for industrial power distribution, machinery and semiconductor protection, it accepts standard 22 × 58 mm cylindrical fuse-links while providing dependable overcurrent protection in demanding electrical installations.
The US223N combines three fused phase poles with an integrated neutral conductor in a compact DIN rail-mounted assembly. Its finger-safe IP20 enclosure remains protected during fuse replacement, helping improve operator safety and simplify maintenance. The holder is also compatible with optional microswitch accessories for remote fuse status indication when required.
Rated for up to 125 A, with voltage ratings of 800 V AC UL, 1000 V DC UL and 690 V AC/DC IEC, the X331174 is ideal for industrial control panels, power conversion equipment, switchboards, renewable energy systems and heavy-duty automation installations.
The UltraSafe™ US22 range provides secure housing for cylindrical fuse-links while maintaining finger-safe protection throughout installation and maintenance. The 3-Pole + Neutral configuration enables three-phase circuits to be protected while providing a dedicated neutral conductor within the same modular assembly.
The X331174 is particularly suited to industrial machinery, renewable energy systems, UPS installations, power conversion equipment and heavy-duty switchboards where dependable high-current fuse protection is essential. Optional microswitch accessories can be added to provide remote fuse monitoring where required.
| Phase | Three Phase |
|---|---|
| Manufacturer | Mersen |
| Series | UltraSafe™ US22 |
| Item number | X331174 |
| Catalogue number | US223N |
| Product type | Modular cylindrical fuse holder |
| Configuration | 3-Pole + Neutral |
| Fuse size | 22 × 58 mm |
| Maximum fuse rating | 125 A |
| Rated voltage AC (UL) | 800 V |
| Rated voltage DC (UL) | 1000 V |
| Rated voltage AC (IEC) | 690 V |
| Rated voltage DC (IEC) | 690 V |
| Frequency | 50 / 60 Hz |
| Short-circuit current rating | 100 kA |
| Protection rating | IP20 |
| Terminal type | Pressure plate |
| Terminal material | Tin-plated copper |
| Wiring range | 1/0 to #14 AWG |
| Tightening torque | 35.4 lb-in (4 Nm approx.) |
| Rated insulation voltage | 750 V |
| Rated impulse withstand voltage | 8 kV |
| Housing material | Polyamide |
| Mounting type | DIN rail mounting to EN 60715 |
| Dimensions (H × W × D) | approx. 127.5 × 140 × 76.5 mm |
| Weight | approx. 0.91 kg |
| EAN / UPC | 0782001311346 |
| RoHS compliant | Yes |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
The X331174 is a 3-Pole + Neutral modular fuse holder designed to house 22 × 58 mm cylindrical fuse-links for industrial overcurrent protection.
The fuse holder accepts standard 22 × 58 mm cylindrical fuse-links.
The US223N supports fuse-links rated up to 125 A.
Yes. The UltraSafe US22 range supports optional microswitch accessories to provide remote fuse status indication where required.
The fuse holder mounts directly onto a standard DIN rail using pressure plate terminals for secure electrical connections.
Mersen UltraSafe™ fuse holders are trusted by panel builders, OEM manufacturers and industrial engineers for dependable circuit protection, finger-safe operation and long-term reliability in demanding electrical installations.
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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...