Mersen W331173 US223M2 UltraSafe three-pole modular fuse holder for 22 x 58 mm fuse-links, rated up to 125 A, 800 V AC and 1000 V DC, with two microswitches and IP20 protection.
£103.66
The Mersen W331173, also identified by catalogue number US223M2, is a robust three-pole modular fuse holder designed for dependable circuit protection in industrial electrical distribution, machinery and power conversion systems. As part of the Mersen UltraSafe™ US22 series, it accepts cylindrical 22 × 58 mm fuse-links and provides a finger-safe design with an IP20 protection rating.
This fuse holder is suitable for both AC and DC applications, with voltage ratings of up to 800 V AC under UL and 1000 V DC under UL. It supports fuse ratings up to 125 A and provides a short-circuit current rating of 100 kA, making it suitable for demanding installations where reliable overcurrent protection is essential.
The W331173 incorporates two microswitches for remote fuse-status indication and monitoring. Its pressure-plate connection system, durable polyamide housing and DIN rail mounting arrangement simplify installation within electrical control panels, switchboards and industrial enclosures.
Modular fuse holders provide a secure mounting and connection point for replaceable fuse-links within electrical distribution and control systems. When excessive current or a short circuit occurs, the installed fuse-link interrupts the circuit to help protect cables, machinery and connected electrical equipment.
The Mersen W331173 combines high voltage and current ratings with a finger-safe enclosure and remote microswitch signalling. The two microswitches can be incorporated into monitoring or control circuits to provide remote indication of fuse-holder status, supporting faster fault identification and reduced equipment downtime.
| Phase | Three Phase |
|---|---|
| Manufacturer | Mersen |
| Series | UltraSafe™ US22 |
| Item number | W331173 |
| Catalogue number | US223M2 |
| Product type | Modular cylindrical fuse holder |
| Number of poles | 3 |
| Fuse size | 22 × 58 mm |
| Maximum fuse rating | 125 A |
| Rated voltage AC, UL | 800 V AC |
| Rated voltage DC, UL | 1000 V DC |
| Rated voltage AC, IEC | 690 V AC |
| Rated voltage DC, IEC | 690 V DC |
| Frequency | 50–60 Hz |
| Short-circuit current rating | 100 kA |
| Rated insulation voltage | 750 V |
| Rated impulse withstand voltage | 8 kV |
| Indication system | Yes |
| Indication type | Two microswitches |
| Protection rating | IP20 |
| Terminal material | Tin-plated copper |
| Terminal type | Clip / pressure plate |
| Wiring range | 1/0 to 14 AWG |
| Torque rating | 35.403 lb-in |
| Housing material | Polyamide |
| Mounting type | DIN rail mounting to EN 60715 |
| Product dimensions (H × W × D) | approx. 127.5 × 105 × 76.5 mm |
| Product weight | approx. 0.67 kg |
| EAN / UPC | 0782001311414 |
| RoHS compliant | Yes |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
The Mersen W331173 is used to hold and connect three 22 × 58 mm cylindrical fuse-links for overcurrent and short-circuit protection in industrial AC and DC electrical systems.
This fuse holder is designed for standard 22 × 58 mm cylindrical fuse-links with ratings up to 125 A.
The W331173 is a three-pole fuse holder, allowing three protected conductors or phases to be installed within one modular unit.
The fuse holder includes two microswitches that can provide remote fuse-status indication to a control system, alarm circuit or monitoring device.
The fuse holder is rated up to 800 V AC and 1000 V DC under UL specifications, with IEC ratings of up to 690 V AC and 690 V DC.
The W331173 is designed for installation on a standard DIN rail in accordance with EN 60715, making it suitable for control panels and electrical enclosures.
Mersen UltraSafe™ fuse holders are used by electrical engineers, machine builders and panel manufacturers to provide reliable fuse protection, safer maintenance and effective circuit monitoring in demanding industrial 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...