Mersen G331160 US221M UltraSafe single-pole fuse holder with microswitch for 22 x 58 mm cylindrical fuse-links, rated at 125 A, 800 V AC UL and 1000 V DC UL.
£38.38
The Mersen G331160, catalogue reference US221M, is a durable single-pole modular fuse holder with microswitch indication, designed for use with 22 × 58 mm cylindrical fuse-links. Part of the Mersen UltraSafe US22 series, it combines dependable overcurrent protection with remote status signalling for industrial power distribution, machinery and automation systems.
The integrated microswitch allows the fuse-holder status to be communicated to an external PLC, alarm circuit or monitoring system. This supports faster fault identification and can help reduce downtime in continuously operated machinery, power conversion equipment and automated production systems.
With a rated current of 125 A, UL voltage ratings of 800 V AC and 1000 V DC, and IEC ratings of 690 V AC or 690 V DC, the G331160 is suitable for demanding industrial applications. Its IP20 finger-safe construction, pressure-plate connection and DIN rail mounting format support safe, efficient panel installation.
The Mersen G331160 securely accommodates a 22 × 58 mm cylindrical fuse-link used to protect electrical circuits against overloads and short circuits. When fitted with a correctly selected fuse-link, it helps prevent damaging fault currents from affecting cables, semiconductor devices, machinery and connected electrical equipment.
Its integrated microswitch enables remote indication through a PLC, alarm or supervisory system, helping maintenance teams locate affected circuits more quickly. This combination of high-voltage capability, finger-safe construction and remote monitoring makes the US221M particularly suitable for modern industrial and energy-conversion systems.
| Phase | Single Phase |
|---|---|
| Manufacturer | Mersen |
| Series | UltraSafe US22 |
| Item number | G331160 |
| Catalogue number | US221M |
| Product type | Modular cylindrical fuse holder |
| Fuse size | 22 × 58 mm |
| Number of poles | 1 |
| Indication system | Yes |
| Indication type | Microswitch |
| Current rating | 125 A |
| 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 |
| Rated insulation voltage | 750 V |
| Rated impulse withstand voltage | 8 kV |
| Short-circuit current rating | 100 kA |
| Conventional free-air thermal current | 125 A |
| Protection rating | IP20 |
| Wiring range | 14 AWG to 1/0 AWG |
| Terminal material | Tin-plated copper |
| Connection type | Pressure plate |
| Fuse installation method | Clip-in |
| Terminal torque | 4 N·m |
| Housing material | Polyamide |
| Mounting type | DIN rail according to EN 60715 |
| Dimensions (H × W × D) | 127.5 × 35 × 76.5 mm |
| Product weight | approximately 0.153 kg |
| RoHS compliant | Yes |
| EAN / UPC | 0782001311247 |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
The Mersen G331160 holds a 22 × 58 mm cylindrical fuse-link and provides microswitch-based remote status indication for industrial AC or DC circuits.
The US221M is designed for standard 22 × 58 mm cylindrical fuse-links with a maximum rating of 125 A.
The microswitch provides an electrical status signal that can be connected to an alarm, PLC input or monitoring system for remote indication.
It is rated up to 800 V AC and 1000 V DC under UL specifications, and up to 690 V AC or 690 V DC under IEC specifications.
The fuse holder mounts onto a standard DIN rail according to EN 60715 and uses a pressure-plate terminal connection inside a suitable electrical enclosure.
Mersen UltraSafe fuse holders are trusted by panel builders, automation engineers and equipment manufacturers for dependable high-voltage circuit protection, finger-safe maintenance and effective remote status monitoring.
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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...