Mersen J331162 UltraSafe US221NM modular fuse holder for 22 × 58 mm cylindrical fuse-links with 1 pole plus neutral configuration, auxiliary microswitch, 125 A rating and IP20 finger-safe protection.
£53.89
The Mersen J331162, catalogue number US221NM, is a premium 1-pole plus neutral modular fuse holder designed for industrial power distribution, machinery and electrical control systems. Part of the advanced Mersen UltraSafe™ US22 range, it accommodates standard 22 × 58 mm cylindrical fuse-links and incorporates an auxiliary microswitch for dependable remote fuse-status indication.
The UltraSafe™ design provides IP20 finger-safe protection, including during fuse replacement, while pressure-plate terminals ensure secure electrical connections. Manufactured from robust thermoplastic materials, the US221NM offers long-term reliability in demanding industrial environments and is easily installed on a standard DIN rail.
Rated at 125 A, with 800 V AC and 1000 V DC UL ratings, together with 690 V AC/DC IEC ratings, the J331162 is ideal for motor control, power conversion, industrial automation and renewable energy applications where remote fuse monitoring is required.
The Mersen J331162 securely accommodates a 22 × 58 mm cylindrical fuse-link while providing an integrated neutral conductor and auxiliary microswitch. When the associated fuse operates, the microswitch can transmit a signal to PLCs, SCADA systems or alarm circuits, helping maintenance personnel identify faults quickly and minimise equipment downtime.
Its combination of high AC and DC voltage capability, compact modular construction and finger-safe design makes the US221NM suitable for demanding industrial applications where dependable overcurrent protection and remote diagnostics are essential.
| Phase | Single Phase |
|---|---|
| Manufacturer | Mersen |
| Series | UltraSafe™ US22 |
| Catalogue number | US221NM |
| Manufacturer part number | J331162 |
| Product type | Modular cylindrical fuse holder |
| Fuse size | 22 × 58 mm |
| Configuration | 1 Pole + Neutral (1P+N) |
| Rated current | 125 A |
| Rated voltage AC (UL) | 800 V |
| Rated voltage DC (UL) | 1000 V |
| Rated voltage AC/DC (IEC) | 690 V |
| Frequency | 50 / 60 Hz |
| Short-circuit current rating | 200 kA |
| Auxiliary contacts | Integrated microswitch |
| Connection type | Pressure plate terminals |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Housing material | Polyamide |
| Product weight | Approximately 0.47 kg |
| EAN | 0782001311223 |
| RoHS compliant | Yes |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
The J331162 accepts standard 22 × 58 mm cylindrical fuse-links.
The auxiliary microswitch provides remote fuse-status indication for PLCs, alarm systems and industrial monitoring equipment.
The fuse holder is rated at 125 A, up to 800 V AC and 1000 V DC under UL ratings, with IEC ratings up to 690 V AC/DC.
Yes. The UltraSafe™ design provides IP20 finger-safe protection, including during fuse replacement.
The fuse holder mounts directly onto a standard DIN rail inside electrical control panels, switchboards and industrial machinery.
Mersen UltraSafe™ fuse holders are trusted worldwide by panel builders, OEM manufacturers and industrial engineers for dependable circuit protection, remote fuse monitoring and long-term reliability in demanding electrical installations.
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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...