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MERSEN FUSE 11 URD 73 D11 A 0800 11URD73D11A0800
High-speed fuse with aR characteristic rated at 800A for AC applications up to 1100VAC IEC and 1200VAC UL, featuring a striker indication system and DIN 110 blade terminals.
£179.02
Why Choose the Mersen J300572 Protistor® High-Speed Semiconductor Fuse?
The Mersen J300572 is a premium Protistor® Size 73 aR square body high-speed semiconductor fuse engineered to provide exceptional protection for modern power electronic equipment. Designed specifically for safeguarding sensitive semiconductor devices, it delivers ultra-fast fault interruption and outstanding current limiting to protect IGBTs, thyristors, diodes and rectifiers from damaging short-circuit currents.
Manufactured by Mersen, this fuse forms part of the internationally recognised Protistor® semiconductor protection range. Its advanced construction incorporates silver-plated contact surfaces, solidified sand technology for controlled arc performance and an integrated striker for remote fuse indication, ensuring dependable operation in demanding industrial environments.
Rated at 800 A with a 1100 V AC IEC / 1200 V AC UL voltage rating, the J300572 is ideally suited to industrial drives, converters, inverters, UPS systems, renewable energy installations and other high-power semiconductor applications requiring reliable circuit protection.
Key Advantages
- Ultra-fast aR semiconductor fuse for sensitive power electronics.
- 800 A current rating for high-power industrial equipment.
- 1100 V AC IEC / 1200 V AC UL voltage rating.
- Excellent current-limiting characteristics minimise fault energy.
- Integrated striker for remote indication and monitoring.
- Designed to maximise semiconductor reliability and equipment uptime.
Key Features
- Mersen Protistor® Size 73 aR semiconductor fuse.
- 800 A rated current.
- 1100 V AC (IEC) / 1200 V AC (UL) rated voltage.
- Square body construction with DIN 110 blade connections.
- Integrated striker indicator.
- Silver-plated contact surfaces.
- Solidified sand construction for controlled arc characteristics.
- Designed for protection of IGBTs, SCRs, diodes and rectifiers.
Reliable Protection for Industrial Power Electronics
High-speed semiconductor fuses are specifically engineered to interrupt severe fault currents before excessive thermal or electrical energy can damage valuable semiconductor devices. Their low let-through energy helps improve equipment reliability while reducing maintenance costs and unplanned downtime.
The Mersen Protistor® Size 73 range is trusted worldwide by OEMs, panel builders and industrial engineers for demanding power conversion applications where dependable semiconductor protection is essential.
Typical Applications
- Variable frequency drives.
- Industrial motor control systems.
- 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 | 1100 V | |
| Item number | J300572 | |
| Catalogue No | PC73UD11C800D1A | |
| Description | Square Body High-Speed Fuse Protistor® Size 73 aR 1100VAC IEC 1200VAC UL 800A With Striker DIN 110 Blades | |
| EAN/UPC Code | 3605340330489 | |
| Rated voltage AC UL | 1200 V | |
| Rated voltage AC IEC | 1100 V | |
| Ampere Rating | 800 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 73 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 1230 kA²s | |
| Melting I2t | 190 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 150 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | DIN 110 Blades | |
| Product Width | 73 mm | |
| Product Length | 133.4 mm | |
| Product Height | 78.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 3.36 kg | |
| Sell Pack Width | 150 mm | |
| Sell Pack Length | 250 mm | |
| Sell Pack Height | 90 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 1.12 kg | |
| Power Dissipation at Rated Current Value | 148 W | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen J300572 used for?
The J300572 is designed to protect power semiconductor devices such as IGBTs, thyristors and rectifiers from damaging short-circuit currents.
What is the current rating of this fuse?
The fuse has a rated current of 800 A for high-power industrial applications.
What voltage is the J300572 designed for?
It is rated for 1100 V AC (IEC) and 1200 V AC (UL) systems.
What does the aR fuse characteristic mean?
The aR operating characteristic provides ultra-fast short-circuit protection specifically for semiconductor devices without providing overload protection.
Where is this fuse commonly installed?
It is typically installed in industrial drives, converters, UPS systems, renewable energy equipment and other high-power semiconductor applications.
Trusted by Industrial Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted worldwide for delivering dependable, ultra-fast protection for industrial power electronics, helping maximise equipment availability and protect valuable semiconductor devices.
