The UltraSafe™ Fuse Holder for 27×60 mm UL fuses supports up to 800VAC or 800VDC with a visual indicator for blown fuse detection and IP20 finger-safe design.
£146.75
The Mersen B223515, catalogue number US27IRING, is a single-pole UltraSafe™ modular fuse holder designed for cylindrical 27 × 60 mm fuse links. Rated for operation at up to 800 V AC and 800 V DC, it provides a robust and finger-safe solution for industrial power distribution, semiconductor protection and power-conversion installations.
Part of the Mersen Modulostar® CMS27 and UltraSafe™ US27 range, the B223515 features an integrated visual fuse-operation indicator, allowing maintenance personnel to identify an operated fuse quickly. Its ring-lug terminal arrangement supports secure cable termination, while the IP20 construction helps protect operators against accidental contact with live parts, including during fuse replacement.
The US27IRING has a conventional free-air thermal current rating of 140 A and accommodates fuse links with a maximum power dissipation of 11 W. DIN rail mounting in accordance with EN 60715 makes it suitable for installation in industrial control panels, drives, converters, UPS systems and renewable-energy equipment.
The Mersen B223515 is designed to provide IP20 finger-safe protection during normal operation and fuse replacement. Its enclosed modular construction helps reduce the risk of accidental contact with energised components, improving safety for operators and maintenance personnel working within industrial electrical panels.
The fuse holder can be mounted directly onto a standard DIN rail and incorporated into modular protection assemblies. Its durable housing is engineered to withstand demanding industrial environments while providing dependable retention and electrical contact for compatible 27 × 60 mm fuse links.
The US27IRING incorporates a visual indication system that identifies when a compatible fuse has operated. This allows maintenance personnel to locate a faulted circuit quickly without testing every fuse individually, helping to reduce diagnostic time and equipment downtime.
The visual indicator is particularly useful in control panels and power-conversion systems containing multiple protected circuits. Compatible microswitch accessories may also be used within the wider UltraSafe™ range where remote electrical indication is required.
| Phase | Single Phase |
|---|---|
| Item number | B223515 |
| Catalogue No | US27IRING |
| Description | Fuse Holder UltraSafe™ 800VAC 800VDC UL Fuse size 27x60 1-pole Visual Indicator Ring lug IP20 |
| EAN/UPC Code | 3605340261851 |
| Rated voltage AC UL | 800 V |
| Rated voltage DC UL | 800 V |
| Rated voltage AC IEC | 800 V |
| Rated voltage DC IEC | 800 V |
| Ampere Rating | 140 A |
| RoHS Compliant | Yes |
| AC or DC | AC/DC |
| Fuse Size | 27x60 |
| Design Details | single pole |
| Indication System | Yes |
| Indication System Type | Visual Indicator |
| Number of Poles | 1-pole |
| Torque Rating | 3.5 Nm |
| Rated Impulse Withstand Voltage | 8 kV |
| Rated Insulation Voltage | 800 V |
| Max Power dissipation of Fuse Links Pn | 11 W |
| Installation Mounting | DIN rail acc. EN 60715 |
| Product Width | 39.9 mm |
| Product Length | 93.5 mm |
| Product Height | 302 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 0.909 kg |
| Sell Pack Width | 169.9 mm |
| Sell Pack Length | 220 mm |
| Sell Pack Height | 110 mm |
| Product group | Fuse Holders |
| Conventional Free Air thermal Current With Fuse-Links Ith | 140 A |
| Product Weight | 0.303 kg |
The B223515 is a single-pole Mersen UltraSafe™ modular fuse holder. Its catalogue number is US27IRING, and it is designed for 27 × 60 mm cylindrical fuse links.
The Mersen US27IRING is rated for operation at up to 800 V AC and 800 V DC under both IEC and UL ratings.
Yes. The fuse holder includes an integrated visual indicator that helps identify when a compatible fuse link has operated.
The B223515 uses ring-lug terminal connections, providing a secure cable termination suitable for demanding industrial installations.
Yes. The US27IRING is designed for DIN rail mounting in accordance with EN 60715.
The fuse holder has a conventional free-air thermal current rating of 140 A when used with suitable fuse links.
Yes. The fuse holder provides IP20 finger-safe protection, including during the fuse-changing process when installed and used correctly.
Mersen Modulostar® and UltraSafe™ fuse holders are specified by panel builders, OEMs and industrial engineers for safe, compact and dependable cylindrical fuse 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...