Why Choose the Mersen D223517 UltraSafe Fuse Holder?
The Mersen D223517, also identified by catalogue number US273IRING, is a robust three-pole UltraSafe™ modular fuse holder designed for 27 × 60 mm cylindrical fuse links. Part of the Mersen Modulostar® CMS27 / UltraSafe™ US27 range, it provides reliable overcurrent protection support for demanding industrial power conversion, automation and electrical distribution systems.
Designed for circuits operating at up to 800 V AC or DC, the D223517 combines a finger-safe IP20 construction with a visual blown-fuse indicator. Its modular format helps simplify fuse replacement and routine maintenance while reducing the risk of accidental contact with live components.
The three-pole configuration is suitable for three-phase electrical systems, while the ring-lug terminal arrangement provides a secure electrical connection in industrial installations. DIN rail compatibility makes the fuse holder straightforward to integrate into control panels, switchboards, inverter systems and power distribution assemblies.
Key Advantages
- Three-pole UltraSafe™ fuse holder for three-phase circuits.
- Suitable for 27 × 60 mm cylindrical fuse links.
- Rated for systems up to 800 V AC and 800 V DC.
- Finger-safe IP20 protection supports safer handling and maintenance.
- Integrated visual blown-fuse indicator.
- Ring-lug terminals provide secure industrial connections.
- DIN rail mounting supports efficient control-panel installation.
- Durable flame-retardant construction for demanding environments.
Key Features
- Mersen Modulostar® CMS27 / UltraSafe™ US27 series.
- Three-pole fuse-holder design.
- 140 A conventional free-air thermal current rating.
- 800 V AC/DC rated voltage.
- 8 kV rated impulse withstand voltage.
- IP20 degree of protection.
- Visual fuse-status indication.
- Ring-lug terminal connection.
- DIN rail mounting in accordance with EN 60715.
- Suitable for semiconductor protection applications.
Reliable Protection for High-Power Electrical Circuits
The Mersen D223517 securely houses compatible 27 × 60 mm fuse links used to protect electrical equipment against damaging overcurrent and short-circuit conditions. Its 800 V AC/DC rating makes it particularly well suited to industrial power conversion and semiconductor protection systems.
The finger-safe modular design helps improve operator protection during fuse inspection and replacement. An integrated visual indicator allows maintenance personnel to identify an operated fuse more quickly, helping reduce fault-finding time and equipment downtime.
Typical Applications
- Industrial inverter and converter systems.
- Uninterruptible power supply equipment.
- Variable-speed motor drives.
- Semiconductor protection circuits.
- Three-phase industrial control panels.
- Power distribution and switchgear assemblies.
- Renewable energy conversion equipment.
- Automation and machine-control systems.
