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MERSEN FUSE 12,5 URD 73 D11 A 0350 12,5URD73D11A0350
High-speed Protistor® fuse providing fast and reliable circuit protection at 350A with advanced aR characteristic and integrated striker for remote indication.
£148.27
Why Choose the Mersen B300565 High-Speed Semiconductor Fuse?
The Mersen B300565 is a premium square body high-speed semiconductor fuse engineered to provide maximum protection for sensitive power electronic equipment. Part of the renowned Mersen Protistor® Size 73 series, this fuse is specifically designed to protect semiconductors including IGBTs, thyristors, diodes and rectifiers used in industrial power conversion applications.
Designed for demanding industrial environments, the B300565 delivers ultra-fast fault interruption to minimise damage caused by short circuits while reducing costly downtime. Its robust square body construction, silver-plated contact surfaces and integrated striker indicator ensure dependable performance throughout its service life.
With a rated current of 350 A and a 1250 V AC IEC / 1300 V AC UL voltage rating, the Mersen B300565 is ideal for protecting variable frequency drives, UPS systems, industrial converters, renewable energy equipment and other high-performance semiconductor applications.
Key Advantages
- High-speed aR semiconductor protection fuse for critical power electronics.
- 350 A current rating for demanding industrial applications.
- 1250 V AC IEC / 1300 V AC UL voltage capability.
- Ultra-fast operation protects IGBTs, thyristors, diodes and rectifiers.
- Integrated striker indicator for remote fuse indication.
- Silver-plated contacts provide excellent conductivity and long operational life.
Key Features
- Mersen Protistor® Size 73 series.
- Catalogue Number: PC73UD13C350D1A.
- 350 A rated current.
- 1250 V AC IEC / 1300 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- Square body Size 73 construction.
- DIN 110 blade terminals.
- Integrated striker indicator for status monitoring.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are specifically designed to interrupt fault currents before they can damage expensive power electronic components. Their low let-through energy helps extend equipment life while reducing maintenance costs and improving overall system reliability.
The Mersen Protistor® Size 73 range has been developed for modern industrial power conversion systems, offering dependable protection for drives, converters, UPS equipment and renewable energy installations where semiconductor protection is critical.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and inverters.
- UPS and backup power systems.
- Renewable energy equipment.
- Industrial semiconductor protection.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1250 V | |
| Item number | B300565 | |
| Catalogue No | PC73UD13C350D1A | |
| Description | Square Body High-Speed Fuse Protistor® Size 73 aR 1250VAC IEC 1300VAC UL 350A With Striker DIN 110 Blades | |
| EAN/UPC Code | 3605340330342 | |
| Rated voltage AC UL | 1300 V | |
| Rated voltage AC IEC | 1250 V | |
| Ampere Rating | 350 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 73 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 140 kA²s | |
| Melting I2t | 17 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 126 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 | 86 W | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen B300565 used for?
The B300565 protects semiconductor devices including IGBTs, thyristors, rectifiers and diodes from damaging short-circuit currents.
What is the current rating of this fuse?
This fuse has a 350 A rated current.
What voltage is the B300565 rated for?
It is rated for 1250 V AC (IEC) and 1300 V AC (UL).
What does the aR operating characteristic mean?
The aR characteristic provides ultra-fast protection specifically for semiconductor devices by limiting fault energy during short-circuit conditions.
Where is this fuse typically installed?
The fuse is commonly installed in industrial drives, power converters, UPS systems, renewable energy equipment and other semiconductor-based power electronics.
Trusted by Power Electronics Engineers Worldwide
Mersen Protistor® high-speed semiconductor fuses are trusted worldwide to provide reliable protection for valuable power electronic equipment in industrial automation, energy and power conversion applications.
