Mersen Z1006203 UltraSafe US221MI single-pole modular fuse holder for 22 x 58 mm cylindrical fuse links, featuring a 125 A rating, visual indicator, microswitch and IP20 protection.
£56.51
The Mersen Z1006203, catalogue reference US221MI, is a robust single-pole modular fuse holder designed for 22 × 58 mm cylindrical fuse links. Part of the Mersen UltraSafe™ US22 range, it provides secure fuse installation, dependable circuit protection and safer maintenance within industrial control panels, switchboards and power distribution systems.
This model includes both a visual fuse-status indicator and a microswitch, allowing local inspection and remote indication of fuse operation. The finger-safe construction provides an IP20 degree of protection, including during fuse replacement, helping reduce accidental contact with live electrical components.
With a maximum current rating of 125 A, UL voltage ratings of up to 800 V AC and 1000 V DC, and a short-circuit current rating of 100 kA, the Z1006203 is suitable for demanding AC and DC applications. Its compact DIN rail-mounted design enables straightforward integration into industrial machinery, renewable energy equipment and electrical distribution assemblies.
Cylindrical fuse holders provide a secure electrical and mechanical connection between fuse links and the protected circuit. When excessive current or a short circuit occurs, the installed fuse link interrupts the electrical supply to help protect cables, machinery and connected equipment from damage.
The Mersen Z1006203 combines a visual indicator with an integrated microswitch, allowing maintenance teams to inspect fuse status locally or transmit a signal to a PLC, alarm or monitoring system. This can reduce fault-finding time and improve maintenance efficiency across complex industrial installations.
| Phase | Single Phase |
|---|---|
| Manufacturer | Mersen |
| Series | UltraSafe™ US22 |
| Item number | Z1006203 |
| Catalogue number | US221MI |
| Product type | Modular cylindrical fuse holder |
| Fuse size | 22 × 58 mm |
| Number of poles | 1-pole |
| Ampere 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 |
| AC or DC | AC / DC |
| Short-circuit current rating | 100 kA |
| Rated insulation voltage | 750 V |
| Rated impulse withstand voltage | 8 kV |
| Protection rating | IP20 |
| Indication system | Visual indicator and microswitch |
| Wiring range | 1/0 AWG to 14 AWG |
| Terminal material | Tin-plated copper |
| Terminal type | Clip / pressure plate |
| Fuse installation method | Clip-in |
| Terminal torque | 4 N m |
| Housing material | Polyamide |
| Mounting type | DIN rail mounting to EN 60715 |
| Dimensions (H × W × D) | 127.5 × 35 × 76.5 mm |
| Product weight | approx. 0.217 kg |
| EAN / UPC | 0782001311254 |
| RoHS compliant | Yes |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
The Mersen Z1006203 is used to hold a 22 × 58 mm cylindrical fuse link within industrial AC or DC electrical protection circuits.
The fuse holder has a maximum fuse and ampere rating of 125 A.
Yes. The US221MI includes a visual indicator and an integrated microswitch for local and remote fuse-status indication.
It is rated up to 800 V AC and 1000 V DC under UL requirements, with IEC ratings of 690 V AC and 690 V DC.
The fuse holder is designed for mounting onto a standard EN 60715 DIN rail inside an electrical enclosure, control cabinet or switchboard.
Mersen UltraSafe™ modular fuse holders are trusted by electrical engineers, panel builders and equipment manufacturers for dependable fuse protection, safer maintenance and effective circuit-status monitoring 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...