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MERSEN FUSE A 070 URD 31 TTI 0630 A070URD31TTI0630
High-speed fuse designed for semiconductor protection with a robust ceramic body, striker indication, and bolted mounting. Rated at 630A, 690VAC IEC, 700VAC UL with a breaking capacity of 200 kA.
£104.89
Why Choose the Mersen J300480 Protistor® High-Speed Semiconductor Fuse?
The Mersen J300480 is a high-performance Protistor® square body high-speed semiconductor fuse engineered to provide ultra-fast protection for modern power electronic equipment. Designed specifically for safeguarding semiconductors such as IGBTs, thyristors (SCRs), diodes and rectifiers, it delivers exceptional fault current limitation and rapid interruption to minimise equipment damage during short-circuit conditions.
As part of Mersen's globally recognised Protistor® Size 31 aR series, the J300480 combines high breaking capacity with low let-through energy, making it ideal for protecting expensive power conversion equipment. Its silver-plated contacts, robust square body construction and integrated striker provide dependable performance in demanding industrial applications.
Rated at 630 A with a 690 V AC (IEC) / 700 V AC (UL) voltage rating, the J300480 is widely used in variable speed drives, UPS systems, inverters, converters and renewable energy equipment where reliable semiconductor protection is essential.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 630 A current rating for demanding industrial applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Excellent current-limiting characteristics reduce semiconductor damage.
- Integrated striker for remote fuse indication.
- Reliable protection for modern power conversion equipment.
Key Features
- Mersen Protistor® Size 31 aR series.
- 630 A rated current.
- 690 V AC (IEC) / 700 V AC (UL) rated voltage.
- Square body fuse with flush ends and UNC threaded connections.
- Integrated striker indicator.
- Silver-plated contact surfaces.
- Solidified sand construction for controlled arc performance.
- Designed for protection of IGBTs, SCRs and semiconductor devices.
Reliable Protection for Industrial Power Electronics
High-speed semiconductor fuses are designed to clear fault currents before sensitive power electronic components suffer thermal or electrical damage. Their low let-through energy helps improve equipment reliability while reducing maintenance costs and downtime.
The Mersen Protistor® range has become a trusted choice for OEMs, panel builders and industrial maintenance engineers requiring dependable protection for power conversion systems and high-value semiconductor devices.
Typical Applications
- Variable speed drives (VSDs).
- Industrial motor drives.
- Power converters and inverters.
- UPS systems.
- Renewable energy installations.
- Battery energy storage systems.
- Industrial power supplies.
- Semiconductor protection circuits.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | J300480 | |
| Catalogue No | A070UD31TTI630 | |
| Description | Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 630A With Striker Flush ends UNC threads | |
| EAN/UPC Code | 3605340329094 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 630 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 31 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 430000 A²s | |
| Melting I2t | 75000 A²s | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Brass | |
| Connection/Terminal Type | Flush ends | |
| Product Width | 51 mm | |
| Product Length | 50.6 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.155 kg | |
| Sell Pack Width | 85 mm | |
| Sell Pack Length | 168 mm | |
| Sell Pack Height | 65 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.385 kg | |
| Power Dissipation at Rated Current Value | 75 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen J300480 used for?
The J300480 protects power semiconductor devices such as IGBTs, SCRs and diodes from damaging short-circuit currents.
What is the current rating of this fuse?
The fuse has a 630 A rated current for high-power industrial applications.
What voltage is the J300480 designed for?
It is rated for 690 V AC (IEC) and 700 V AC (UL) power systems.
What does the aR fuse characteristic mean?
The aR characteristic provides ultra-fast protection specifically for semiconductor devices against short-circuit faults.
Where is this fuse commonly installed?
It is typically installed in industrial drives, converters, UPS systems, renewable energy equipment and other power conversion applications.
Trusted by Industrial Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted worldwide for delivering reliable, ultra-fast protection for industrial power electronics, helping maximise equipment uptime and protect valuable semiconductor devices.
