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MERSEN FUSE A 070 URD 31 TTI 0800 A070URD31TTI0800
High-speed Protistor® fuse with 800A rating, ceramic square body, flush ends with UNC threads, integrated striker for remote indication, suitable for IEC 690VAC and UL 700VAC systems.
£121.97
Why Choose the Mersen L300482 Protistor® High-Speed Fuse?
The Mersen L300482, catalogue number A070UD31TTI800, is a Protistor® Size 31 square body high-speed semiconductor fuse designed to provide advanced protection for sensitive power electronic equipment. Its ultra-fast aR operating characteristic delivers reliable short-circuit protection for IGBTs, thyristors, diodes and other semiconductor devices used in industrial power conversion systems.
Designed for demanding industrial applications, the L300482 combines low let-through energy with a high interrupting capacity to minimise damage during fault conditions. It features flush ends with UNC threaded connections and an integrated striker indicator for optional remote fuse monitoring.
Rated at 800 A with 690 V AC (IEC) and 700 V AC (UL) voltage ratings, the Mersen L300482 is suitable for industrial drives, converters, UPS equipment, renewable energy systems and other high-performance power electronic applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 800 A current rating for demanding industrial applications.
- 690 V AC IEC / 700 V AC UL voltage capability.
- Protects IGBTs, thyristors, diodes and other semiconductor devices.
- Integrated striker indicator for remote monitoring.
- Low I²t design helps minimise semiconductor damage.
Key Features
- Mersen Protistor® Size 31 series.
- Catalogue number: A070UD31TTI800.
- 800 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- Flush ends with UNC threaded terminals.
- Silver-plated contact surfaces.
- Integrated low-voltage striker indication.
- Square body bolted construction.
High-Speed Protection for Power Electronics
Protistor® semiconductor fuses are engineered to interrupt high fault currents before sensitive power electronic devices are damaged. Their low energy let-through characteristics help maximise equipment availability while reducing repair costs in industrial power conversion systems.
The robust square body construction, silver-plated contacts and precision fuse elements ensure dependable long-term performance across industrial automation, renewable energy and power conversion applications.
Typical Applications
- Variable speed motor drives.
- Industrial power converters.
- IGBT and thyristor protection.
- UPS and backup power systems.
- Renewable energy inverters.
- Industrial automation and power electronic equipment.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | L300482 | |
| Catalogue No | A070UD31TTI800 | |
| Description | Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 800A With Striker Flush ends UNC threads | |
| EAN/UPC Code | 3605340329117 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 800 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 31 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 880000 A²s | |
| Melting I2t | 140000 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 | 105 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen L300482 used for?
The L300482 is a high-speed semiconductor protection fuse designed to protect IGBTs, thyristors, diodes and other sensitive power electronic devices from short-circuit faults.
What is the current rating of the Mersen L300482?
The Mersen L300482 has a rated current of 800 A.
What voltage is the fuse rated for?
The fuse is rated for 690 V AC (IEC) and 700 V AC (UL).
What type of terminals does the L300482 use?
The L300482 features flush ends with UNC threaded terminals for secure bolted installation.
What does the integrated striker do?
The built-in striker provides mechanical indication when the fuse operates and can be used with a compatible microswitch for remote monitoring.
Trusted Protection for Critical Power Electronics
Mersen Protistor® semiconductor fuses are trusted worldwide by machine builders, electrical engineers and power electronics manufacturers to deliver rapid fault protection, dependable performance and long-term equipment reliability.
