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MERSEN FUSE 30A J 3P ULTRASAFE US3J3
Mersen US3J3 UltraSafe three-pole Class J fuse holder rated 30 A and 600 V AC/DC with IP20 finger-safe protection and DIN rail mounting.
£81.40
Why Choose the Mersen US3J3 UltraSafe™ Class J Fuse Holder?
The Mersen US3J3 is a premium three-pole UltraSafe™ Class J fuse holder engineered for dependable overcurrent protection in industrial power distribution systems. Designed to accommodate 30 A Class J fuses or compatible 22 × 58 mm IEC cylindrical fuse links, it combines compact DIN rail mounting with industry-leading finger-safe protection for industrial control panels, switchboards and OEM machinery.
Part of the proven Mersen UltraSafe™ US3J series, the US3J3 features a durable polyamide housing, pressure-plate terminals and a unique latch mechanism that remains open during fuse replacement, making maintenance safer and more efficient. Its compact three-pole construction simplifies panel assembly whilst maintaining excellent electrical performance.
Rated for 30 A with 600 V AC and 600 V DC operation, the US3J3 provides a 200 kA short-circuit current rating when used with approved Class J fuses. This standard version is supplied without blown-fuse indication, making it ideal for installations where visual indication is not required.
Key Advantages
- Compact three-pole Class J fuse holder for industrial installations.
- Compatible with 30 A Class J fuses.
- 600 V AC / 600 V DC rated operation.
- 200 kA short-circuit current rating.
- IP20 finger-safe construction improves operator safety.
- 35 mm DIN rail mounting for fast installation and maintenance.
Key Features
- Mersen UltraSafe™ US3J series.
- Three-pole fuse holder.
- 30 A maximum fuse 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.
- DIN rail mounting with lockable open position.
Reliable Protection for Three-Phase Industrial Power Systems
The Mersen US3J3 provides dependable overcurrent protection for three-phase electrical circuits using Class J fuses. Its compact three-pole design allows multiple protected circuits to be installed within a single assembly whilst maintaining safe finger-safe access during routine maintenance.
Designed for industrial control panels, power distribution equipment and OEM machinery, the US3J3 combines high interrupting capacity with durable construction and rapid DIN rail installation, providing long service life in demanding industrial environments.
Typical Applications
- Industrial control panels.
- Three-phase power distribution systems.
- Motor protection circuits.
- Heating and lighting circuits.
- OEM machinery.
- Industrial automation equipment.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | None | |
|---|---|---|
| Current | 30 A | |
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | Fuse base / holder | |
| Fuse Type | UL class | |
| Fuse Size | 22x58 mm | |
| Voltage | 600 V | |
| Manufacturer | Mersen | |
| Series | UltraSafe™ US3J | |
| Model | US3J3 | |
| Product type | Class J modular fuse holder | |
| Fuse class | Class J | |
| Number of poles | 3 | |
| Maximum fuse rating | 30 A | |
| Rated voltage AC | 600 V UL | |
| Rated voltage DC | 600 V UL | |
| Frequency | 50 / 60 Hz | |
| Short-circuit current rating | 200 kA | |
| Compatible fuse size | 22 × 58 mm IEC (non-UL application) | |
| Terminal type | Pressure plate | |
| Housing material | Polyamide | |
| Protection rating | IP20 finger-safe | |
| Mounting type | 35 mm DIN rail | |
| Indicator | No | |
| Product weight | Approx. 0.65 kg | |
| EAN / UPC | 0782001307738 | |
| HS Code | 85369095 | |
| Country of Manufacture | China |
Frequently Asked Questions
What is the Mersen US3J3 used for?
The US3J3 is a three-pole UltraSafe™ fuse holder designed for protecting industrial electrical circuits using 30 A Class J fuses.
Which fuses are compatible with the US3J3?
It is designed for Mersen AJT, A4J and HSJ Class J fuses and can also accept compatible 22 × 58 mm IEC cylindrical fuse links.
What are the voltage and current ratings?
The US3J3 is rated for 30 A with operating voltages up to 600 V AC and 600 V DC.
Does the US3J3 include blown-fuse indication?
No. The US3J3 is the standard version without a blown-fuse indicator. The indicator version is the US3J3I.
How is the US3J3 installed?
It is designed to snap onto a standard 35 mm DIN rail and uses pressure-plate terminals for secure electrical connections.
Trusted by Industrial Engineers Worldwide
Mersen UltraSafe™ Class J fuse holders are trusted worldwide by OEMs, panel builders and industrial engineers for dependable overcurrent protection, finger-safe operation and long-term reliability in demanding industrial electrical installations.
