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MERSEN FUSE 6,9 URD 31 D08 A 0315 6,9URD31D08A0315
High-speed aR fuse rated 315A for AC applications up to 690VAC IEC and 700VAC UL with built-in striker indication and DIN 80 blade terminals.
£75.61
Why Choose the Mersen A300012 Protistor® High-Speed Fuse?
The Mersen A300012 (PC31UD69V315A) is a premium Protistor® square body high-speed semiconductor fuse designed to provide ultra-fast short-circuit protection for sensitive power electronic equipment. Featuring an aR operating characteristic, it is specifically engineered to protect semiconductor devices including IGBTs, thyristors, SCRs and diodes used in modern industrial power conversion systems.
Manufactured by Mersen, this fuse combines high interrupting capacity, low let-through energy and robust construction to minimise equipment damage during fault conditions. Silver-plated contacts, solidified sand technology and an integrated striker indicator ensure dependable performance in demanding industrial environments.
Rated at 315 A with a 690 V AC IEC / 700 V AC UL voltage rating, the A300012 is ideally suited for variable speed drives, UPS systems, power converters, renewable energy equipment and industrial automation installations requiring reliable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 315 A current rating for high-power industrial applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- High 200 kA breaking capacity for dependable fault protection.
- Integrated striker indicator for easy status monitoring.
- Silver-plated DIN 80 blade contacts for reliable electrical performance.
Key Features
- Mersen Protistor® Size 31 semiconductor fuse.
- Catalogue number: PC31UD69V315A.
- Item number: A300012.
- 315 A rated current.
- 690 V AC IEC / 700 V AC UL.
- aR operating characteristic.
- DIN 80 bolted blade terminals.
- Integrated striker indicator.
Reliable Semiconductor Protection
High-speed semiconductor fuses are engineered to interrupt fault currents before excessive energy reaches sensitive electronic components. Their ultra-fast operating characteristics help protect expensive power semiconductors, reduce repair costs and maximise equipment availability.
The Mersen Protistor® range is trusted worldwide for protecting industrial power converters, motor drives, UPS installations and renewable energy systems where high-performance semiconductor protection is critical.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and rectifiers.
- UPS systems.
- Renewable energy inverters.
- Industrial automation and power distribution equipment.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | D / D0 (Neozed/Diazed), Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | A300012 | |
| Catalogue No | PC31UD69V315A | |
| Description | Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 315A With Striker DIN 80 Blades | |
| EAN/UPC Code | 3605340322361 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 315 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 31 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 44000 A²s | |
| Melting I2t | 7500 A²s | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | DIN 80 Blades | |
| Product Width | 51 mm | |
| Product Length | 110 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.1598 kg | |
| Sell Pack Width | 143 mm | |
| Sell Pack Length | 167 mm | |
| Sell Pack Height | 64 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.3866 kg | |
| Power Dissipation at Rated Current Value | 65 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen A300012 used for?
It provides ultra-fast short-circuit protection for semiconductor devices such as IGBTs, thyristors, SCRs and diodes used in industrial power electronic equipment.
What is the current rating of the A300012?
The fuse has a 315 A current rating.
What voltage is this fuse designed for?
The A300012 is rated for 690 V AC (IEC) and 700 V AC (UL).
What does the aR fuse characteristic mean?
An aR fuse provides ultra-fast short-circuit protection specifically for semiconductor devices and should be used alongside suitable overload protection.
Where is the A300012 commonly installed?
It is commonly installed in motor drives, UPS systems, industrial converters, renewable energy equipment and other power electronic applications.
Trusted by Industrial Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted globally to protect critical power electronic equipment, helping maximise reliability while reducing maintenance costs and unplanned downtime.
