Mersen T331171 US223M UltraSafe three-pole modular fuse holder for 22 x 58 mm cylindrical fuse links, rated 125 A with an integrated microswitch, IP20 protection and DIN rail mounting.
£93.56
The Mersen T331171, catalogue reference US223M, is a high-performance three-pole modular fuse holder designed for safe and dependable protection of industrial electrical circuits. Part of the proven Mersen UltraSafe™ US22 series, it accommodates standard 22 × 58 mm cylindrical fuse links and combines high current capacity with a compact DIN rail mounted design.
The US223M includes an integrated microswitch indication system, allowing fuse status to be monitored remotely through PLC inputs, alarms and industrial control equipment. This functionality helps maintenance teams identify fuse operation quickly, reduce fault-finding time and minimise disruption to critical machinery and production systems.
Rated for 125 A, with voltage ratings of 800 V AC UL, 1000 V DC UL and 690 V AC/DC IEC, the Mersen T331171 is suitable for demanding AC and DC installations. Its IP20 finger-safe polyamide housing, pressure-plate connections and robust clip-in fuse mechanism provide reliable performance in industrial control panels, switchboards and automation equipment.
The Mersen T331171 securely houses three 22 × 58 mm cylindrical fuse links and provides dependable overcurrent protection for industrial AC and DC circuits. Its high short-circuit rating and durable polyamide housing make it suitable for critical power and automation systems where reliable operation is essential.
The integrated microswitch allows fuse status to be communicated to external monitoring equipment, enabling rapid fault notification and improved maintenance planning. Combined with its finger-safe construction and straightforward clip-in fuse installation, the US223M helps improve safety, system availability and maintenance efficiency.
| Phase | Three Phase |
|---|---|
| Manufacturer | Mersen |
| Series | UltraSafe™ US22 |
| Item number | T331171 |
| Catalogue number | US223M |
| Product type | Modular cylindrical fuse holder |
| Fuse size | 22 × 58 mm |
| Number of poles | 3 |
| Rated current | 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 |
| Rated insulation voltage | 750 V |
| Rated impulse withstand voltage | 8 kV |
| Short-circuit current rating | 100 kA |
| Frequency | 50 / 60 Hz |
| Indication system | Integrated microswitch |
| Wiring range | 1/0 to 14 AWG |
| Terminal material | Tin-plated copper |
| Terminal type | Pressure plate / clip |
| Fuse installation | Clip-in |
| Terminal torque | 4 N·m |
| Housing material | Polyamide |
| Protection rating | IP20 |
| Mounting type | DIN rail to EN 60715 |
| Dimensions (W × L × H) | 105 × 76.5 × 127.5 mm |
| Product weight | Approx. 0.67 kg |
| EAN / UPC | 0782001311407 |
| RoHS compliant | Yes |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
The Mersen T331171 is a three-pole modular fuse holder used to install and protect 22 × 58 mm cylindrical fuse links in industrial AC and DC electrical systems.
The Mersen catalogue reference for item number T331171 is US223M.
Yes. It includes an integrated microswitch that can signal fuse status to PLCs, alarms and other monitoring equipment.
The fuse holder is rated for 125 A, 800 V AC UL, 1000 V DC UL and 690 V AC/DC IEC.
It is designed for DIN rail mounting to EN 60715 and uses pressure-plate connections with a clip-in fuse installation method.
Mersen UltraSafe™ fuse holders are widely specified by OEMs, panel builders and electrical engineers for dependable cylindrical fuse protection, finger-safe maintenance and effective remote fuse-status monitoring.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...