Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE 11 URD 71 TT F 0550 11URD71TTF0550
High-speed aR characteristic fuse for semiconductor protection rated at 550A, 1100VAC IEC and 1200VAC UL with integrated striker and flush end terminals.
£109.69
Why Choose the Mersen G300524 Protistor® High-Speed Fuse?
The Mersen G300524 is a genuine Protistor® Size 71 aR high-speed semiconductor fuse engineered to provide advanced protection for today's high-power electronic equipment. Designed for demanding industrial applications, this square body fuse delivers ultra-fast fault interruption to protect sensitive semiconductor devices including IGBTs, thyristors and diodes from damaging short-circuit conditions.
With a 550 A current rating and 1100 V AC (IEC) / 1200 V AC (UL) voltage ratings, the G300524 is ideally suited to high-voltage power converters, industrial drives, renewable energy systems, UPS installations and other demanding power conversion equipment. Its ultra-fast aR operating characteristic helps minimise let-through energy, reducing equipment damage while improving overall system reliability.
Supplied under manufacturer part number G300524 and catalogue number PC71UD11C550TF, this fuse features flush-end metric threaded terminals with an integrated striker indication system for straightforward monitoring and maintenance. Silver-plated contact surfaces and robust construction make it suitable for continuous operation in demanding industrial environments.
Key Advantages
- Genuine Mersen Protistor® high-speed semiconductor fuse.
- 550 A current rating for demanding industrial applications.
- 1100 V AC IEC / 1200 V AC UL rated operation.
- Ultra-fast aR characteristic for semiconductor protection.
- Flush-end metric threaded terminals with integrated striker indication.
- High 200 kA breaking capacity for dependable fault interruption.
Key Features
- Mersen Protistor® Size 71 series.
- Model G300524.
- Catalogue number PC71UD11C550TF.
- 550 A rated current.
- 1100 V AC IEC / 1200 V AC UL.
- Square body fuse with flush-end metric threaded terminals.
- Integrated striker indication.
- Silver-plated contacts for dependable long-term performance.
Reliable Protection for High-Voltage Power Electronics
High-speed semiconductor fuses are specifically engineered to protect sensitive electronic power devices requiring extremely rapid fault interruption. Their low let-through energy helps safeguard expensive semiconductor assemblies while maintaining reliable system operation and reducing maintenance costs.
The Mersen Protistor® Size 71 range provides maximum flexibility for equipment designers and is widely specified for renewable energy converters, industrial automation, high-power drives, UPS systems and other high-voltage power conversion applications.
Typical Applications
- High-voltage variable frequency drives (VFDs).
- Industrial inverters.
- Renewable energy power converters.
- UPS systems.
- Power conversion equipment.
- Semiconductor protection in industrial automation.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1100 V | |
| Item number | G300524 | |
| Catalogue No | PC71UD11C550TF | |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1100VAC IEC 1200VAC UL 550A With Striker Flush ends metric threads | |
| EAN/UPC Code | 3605340329766 | |
| Rated voltage AC UL | 1200 V | |
| Rated voltage AC IEC | 1100 V | |
| Ampere Rating | 550 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 71 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 548 kA²s | |
| Melting I2t | 84 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 150 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 | 74 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.545 kg | |
| Sell Pack Width | 90 mm | |
| Sell Pack Length | 170 mm | |
| Sell Pack Height | 70 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.515 kg | |
| Power Dissipation at Rated Current Value | 98 W | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen G300524 used for?
The Mersen G300524 is a high-speed semiconductor fuse designed to protect power electronic equipment against short-circuit and overcurrent faults.
What is the current rating of this fuse?
The fuse has a 550 A current rating.
What voltage is the G300524 rated for?
It is rated for 1100 V AC (IEC) and 1200 V AC (UL).
What type of terminals does this fuse use?
The fuse features flush-end metric threaded terminals with an integrated striker indication system.
Where is this fuse commonly installed?
It is commonly installed in high-voltage drives, renewable energy converters, UPS systems and industrial power conversion equipment.
Trusted by Industrial Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted by OEMs, panel builders and maintenance engineers worldwide for reliable protection of critical power electronic equipment in demanding industrial environments.
