Mersen H331161 UltraSafe US221N modular fuse holder for 22 × 58 mm cylindrical fuse-links, with one pole plus neutral, 125 A rating, 800 V AC and 1000 V DC UL ratings, DIN rail mounting and IP20 protection.
£48.65
The Mersen H331161, also identified by the catalogue number US221N, is a robust modular 22 × 58 mm cylindrical fuse holder designed for reliable overcurrent protection in industrial power distribution, machinery and electrical control systems. Part of the Mersen UltraSafe™ US22 range, it combines one protected pole with an integrated neutral conductor.
The H331161 features a durable polyamide housing and an IP20 finger-safe design, including during fuse replacement. Its pressure-plate connection system supports secure conductor termination, while the DIN rail mounting format enables straightforward installation inside switchboards, control panels and industrial enclosures.
Rated at 125 A, up to 800 V AC under UL ratings and 1000 V DC under UL ratings, the H331161 is suitable for demanding AC and DC applications. Under IEC ratings, it supports up to 690 V AC or DC and provides a short-circuit current rating of 100 kA.
The Mersen H331161 provides a secure mounting and connection point for 22 × 58 mm cylindrical fuse-links used to protect electrical equipment against overloads and short-circuit faults. Its high AC and DC voltage ratings make it suitable for industrial distribution systems, power conversion equipment and machinery operating at elevated voltages.
The integrated neutral conductor simplifies wiring in applications requiring a protected phase and neutral arrangement. Optional auxiliary microswitches may also be fitted to support remote fuse-status indication through alarms, PLCs or supervisory monitoring systems.
| Phase | Single Phase |
|---|---|
| Manufacturer | Mersen |
| Series | UltraSafe™ US22 |
| Catalogue number | US221N |
| Item number | H331161 |
| Product type | Modular cylindrical fuse holder |
| Fuse size | 22 × 58 mm |
| Configuration | 1 pole + neutral |
| Ampere 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 |
| Rated insulation voltage | 750 V |
| Rated impulse withstand voltage | 8 kV |
| Maximum fuse rating | 125 A |
| Wiring range | 1/0 to 14 AWG |
| Terminal material | Tin-plated copper |
| Connection type | Pressure plate |
| Fuse installation method | Clip-in |
| Terminal torque | 4 N·m |
| Protection rating | IP20 |
| Mounting type | DIN rail according to EN 60715 |
| Housing material | Polyamide |
| Dimensions (H × W × D) | 127.5 × 70 × 76.5 mm |
| Product weight | 0.45 kg |
| EAN / UPC | 0782001311209 |
| RoHS compliant | Yes |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
The H331161 is designed for standard 22 × 58 mm cylindrical fuse-links.
It provides one protected fuse pole together with an integrated neutral conductor, making it suitable for circuits requiring a phase and neutral connection.
The fuse holder is rated at 125 A, up to 800 V AC and 1000 V DC under UL ratings, and up to 690 V AC or DC under IEC ratings.
Yes. The H331161 provides IP20 finger-safe protection, including during normal fuse replacement.
The fuse holder mounts onto a standard DIN rail in accordance with EN 60715 inside an electrical control panel, switchboard or equipment enclosure.
Mersen UltraSafe™ fuse holders are widely specified by panel builders, machine manufacturers and electrical engineers for dependable circuit protection, finger-safe construction and reliable performance in demanding AC and DC 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...