Mersen Z331153 US141 UltraSafe single-pole modular fuse holder for 14 x 51 mm cylindrical fuse links, rated at 50 A with 800 V AC and 1000 V DC UL ratings, 100 kA SCCR and IP20 protection.
£14.80
The Mersen Z331153, catalogue reference US141, is a robust single-pole modular fuse holder designed for 14 × 51 mm cylindrical fuse links. Part of the proven Mersen UltraSafe™ US14 series, it provides secure fuse installation and reliable circuit protection for industrial control panels, switchboards, machinery and electrical distribution systems.
The UltraSafe™ design features finger-safe IP20 protection under IEC requirements, including during fuse replacement. This helps reduce the risk of accidental contact with live components while supporting safer inspection, maintenance and fuse changing by qualified electrical personnel.
Rated at up to 800 V AC and 1000 V DC under UL requirements, with a maximum current rating of 50 A and a short-circuit current rating of 100 kA, the Z331153 is suitable for demanding AC and DC protection applications. Its compact DIN rail-mounted construction makes it straightforward to integrate into modern electrical enclosures and industrial systems.
Cylindrical fuse holders provide a secure electrical and mechanical connection between replaceable fuse links and the protected circuit. When an overload or short circuit occurs, the correctly selected fuse link interrupts the supply to help protect cables, machinery and connected equipment from damage.
The Mersen UltraSafe™ US14 design combines a compact modular footprint with finger-safe construction and high electrical ratings. Compatible modules can also be field assembled into multi-pole arrangements, while optional auxiliary microswitches can be used where remote fuse-status indication is required.
| Phase | Single Phase |
|---|---|
| Manufacturer | Mersen |
| Series | UltraSafe™ US14 |
| Item number | Z331153 |
| Catalogue number | US141 |
| Product type | Modular cylindrical fuse holder |
| Fuse size | 14 × 51 mm |
| Number of poles | 1-pole |
| Ampere rating | 50 A |
| Maximum fuse rating | 50 A |
| Rated voltage AC, UL | 800 V AC |
| Rated voltage DC, UL | 1000 V DC |
| Rated voltage AC, IEC | 750 V AC |
| Rated voltage DC, IEC | 750 V DC |
| Frequency | 50 / 60 Hz |
| AC or DC | AC / DC |
| Short-circuit current rating | 100 kA |
| Rated insulation voltage | 690 V |
| Rated impulse withstand voltage | 8 kV |
| Protection rating | IP20 |
| Wiring range | #2 to #14 AWG |
| Terminal material | Tin-plated copper |
| Terminal type | Clip |
| Fuse installation method | Clip-in |
| Terminal torque | 3.5 N m |
| Housing material | Polyamide |
| Mounting type | DIN rail mounting to EN 60715 |
| Dimensions (H × W × D) | 110.8 × 26.5 × 76.5 mm |
| Product weight | approx. 0.143 kg |
| EAN / UPC | 0782001310882 |
| RoHS compliant | Yes |
| HS Code | 85361050 |
| Country of Manufacture | Tunisia |
The Mersen Z331153 is used to hold a 14 × 51 mm cylindrical fuse link within industrial AC or DC circuit-protection systems.
The fuse holder has a maximum fuse and ampere rating of 50 A.
It is rated up to 800 V AC and 1000 V DC under UL requirements, with IEC ratings of 750 V AC and 750 V DC.
No. The standard US141 does not include an integrated visual blown-fuse indicator, although compatible auxiliary microswitch accessories may be used where remote indication is required.
The fuse holder is designed for mounting onto a standard EN 60715 DIN rail inside an electrical enclosure, switchboard or control panel.
Mersen UltraSafe™ modular fuse holders are trusted by electrical engineers, panel builders and equipment manufacturers for dependable fuse protection, safer maintenance and reliable performance in demanding industrial systems.
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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...