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MERSEN FUSE 30A J 1P ULTRASAFE US3J1
Mersen US3J1 UltraSafe single-pole Class J fuse holder rated 30 A and 600 V AC/DC with IP20 finger-safe protection and DIN rail mounting.
£26.42
Why Choose the Mersen US3J1 UltraSafe™ Class J Fuse Holder?
The Mersen US3J1 is a premium single-pole UltraSafe™ Class J fuse holder engineered for reliable overcurrent protection in industrial power distribution systems. Designed for use with 30 A Class J fuses or compatible 22 × 58 mm IEC cylindrical fuse links, it delivers outstanding electrical performance whilst providing enhanced safety for panel builders, OEMs and maintenance engineers.
Part of the proven Mersen UltraSafe™ US3J series, the US3J1 features an IP20 finger-safe design, durable polyamide housing and a convenient DIN rail mounting system. The holder also includes a latch that remains open during fuse replacement, simplifying maintenance and improving operator safety.
Rated for 30 A with 600 V AC and 600 V DC operation, the US3J1 is ideal for protecting motors, transformers, lighting circuits, heating equipment, control circuits and general industrial loads. This standard version is supplied without a blown-fuse indicator.
Key Advantages
- Single-pole UltraSafe™ Class J fuse holder.
- Accepts 30 A Class J fuses or compatible 22 × 58 mm IEC fuse links.
- 600 V AC / 600 V DC rated operation.
- IP20 finger-safe protection improves operator safety.
- DIN rail mounting with re-positionable latch.
- Suitable for demanding industrial power distribution applications.
Key Features
- Mersen UltraSafe™ US3J series.
- Single-pole Class J fuse holder.
- 30 A maximum current rating.
- 600 V AC UL rated voltage.
- 600 V DC UL rated voltage.
- Compatible with AJT, A4J and HSJ Class J fuses.
- Compatible with 22 × 58 mm IEC cylindrical fuse links.
- 200 kA SCCR.
- Pressure-plate terminals.
- IP20 finger-safe construction with DIN rail mounting.
Reliable Protection for Industrial Power Systems
The Mersen US3J1 provides dependable protection for Class J fuse applications whilst simplifying installation and maintenance. Its finger-safe construction helps reduce the risk of accidental contact with live components, and the hinged design allows quick fuse replacement without removing the holder from the DIN rail.
Designed for industrial control panels, power distribution equipment and OEM machinery, the US3J1 delivers reliable circuit protection for motors, transformers, lighting systems and general industrial loads whilst maintaining compliance with recognised international standards.
Typical Applications
- Industrial control panels.
- Motor protection circuits.
- Power distribution systems.
- Transformers.
- Heating and lighting circuits.
- OEM machinery and automation equipment.
Technical Specifications
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| Fuse Indication | None | |
|---|---|---|
| Current | 30 A | |
| Phase | Single Phase | |
| Device Type | Fuse base / holder | |
| Fuse Type | UL class | |
| Fuse Size | 22x58 mm | |
| Voltage | 600 V | |
| Manufacturer | Mersen | |
| Series | UltraSafe™ US3J | |
| Model | US3J1 | |
| Product type | Class J fuse holder | |
| Configuration | 1 pole | |
| Fuse class | Class J | |
| Compatible IEC fuse size | 22 × 58 mm | |
| Rated current | 30 A | |
| Rated voltage AC | 600 V UL | |
| Rated voltage DC | 600 V UL | |
| Frequency | 50 / 60 Hz | |
| Short-circuit current rating | 200 kA | |
| Protection rating | IP20 | |
| Mounting type | 35 mm DIN rail | |
| Terminal type | Pressure plate | |
| Housing material | Polyamide | |
| Indicator | No | |
| EAN / UPC | 0782001307714 | |
| HS Code | 85369095 | |
| Country of Manufacture | China |
Frequently Asked Questions
What is the Mersen US3J1 used for?
The US3J1 is a single-pole UltraSafe™ fuse holder designed for protecting industrial electrical circuits using 30 A Class J fuses.
Which fuse types are compatible with the US3J1?
It is designed for Class J AJT, A4J and HSJ fuses and is also compatible with 22 × 58 mm IEC cylindrical fuse links.
What are the voltage and current ratings?
The US3J1 is rated for 30 A with operating voltages up to 600 V AC and 600 V DC.
Does the US3J1 include a blown-fuse indicator?
No. The standard US3J1 does not include a blown-fuse indicator. The indicator version is the US3J1I.
How is the US3J1 installed?
The fuse holder is designed for 35 mm DIN rail mounting and uses pressure-plate terminals for secure electrical connections.
Trusted by Industrial Engineers Worldwide
Mersen UltraSafe™ Class J fuse holders are trusted by OEMs, panel builders and industrial engineers for dependable overcurrent protection, finger-safe operation and long-term reliability in demanding electrical installations.
