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MERSEN FUSE 12 URD 70 D11 A 0315 12URD70D11A0315
High-speed aR characteristic fuse rated 315A, 1200VAC IEC, 1300VAC UL with integrated striker indication and DIN 110 blade terminals for semiconductor protection.
£79.24
Why Choose the Mersen C300543 High-Speed Semiconductor Fuse?
The Mersen C300543 is an industrial high-speed semiconductor fuse designed to protect sensitive power electronic equipment against damaging short-circuit currents. Developed by Mersen for demanding electrical protection applications, it provides rapid fault interruption for semiconductor components such as IGBTs, thyristors, rectifier diodes and power modules.
The C300543 combines fast operating performance with robust industrial construction, helping limit the thermal and electrical energy transferred to protected components during a fault. This reduces the risk of extensive equipment damage and supports improved reliability in power conversion, motor control and industrial automation systems.
Its compact square-body format makes the Mersen C300543 fuse suitable for installation in compatible fuse holders, busbar assemblies and electrical control equipment. The exact voltage, current, terminal configuration and dimensional requirements should be confirmed against the original Mersen documentation or the markings on the fuse before installation.
Key Advantages
- High-speed semiconductor protection for industrial power electronics.
- Rapid fault interruption helps reduce damage to sensitive components.
- Low let-through energy supports effective short-circuit protection.
- Robust construction for demanding industrial environments.
- Suitable for power conversion, motor control and automation equipment.
- Manufactured by Mersen, a recognised specialist in electrical protection.
Key Features
- Mersen C300543 industrial fuse.
- High-speed operating characteristic for semiconductor devices.
- Designed to limit damaging fault current and energy.
- Suitable for protecting IGBTs, SCRs, diodes and rectifier assemblies.
- Industrial square-body construction.
- Compatible with appropriately rated fuse mounting systems.
- Designed for dependable operation in power electronic equipment.
- Suitable for replacement and maintenance applications.
Reliable Protection for Power Electronic Equipment
Semiconductor components can be damaged by fault currents before conventional circuit protection devices have time to operate. High-speed fuses such as the Mersen C300543 are engineered to interrupt these currents rapidly, limiting the amount of energy that reaches sensitive electronic components.
This type of fuse is commonly used as part of a coordinated protection system within industrial drives, rectifiers, inverters and power supplies. Correct fuse selection is essential, and the replacement device should match the required current rating, voltage rating, operating class, dimensions and terminal arrangement of the original component.
Typical Applications
- Variable frequency drives and motor controllers.
- Industrial inverters and power converters.
- Rectifier and thyristor assemblies.
- Uninterruptible power supply systems.
- Industrial automation and control equipment.
- Renewable energy conversion systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1200 V | |
| Item number | C300543 | |
| Catalogue No | PC70UD12C315D1A | |
| Description | Square Body High-Speed Fuse Protistor® Size 70 aR 1200VAC IEC 1300VAC UL 315A With Striker DIN 110 Blades | |
| EAN/UPC Code | 3605340330014 | |
| Rated voltage AC UL | 1300 V | |
| Rated voltage AC IEC | 1200 V | |
| Ampere Rating | 315 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 70 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 149000 A²s | |
| Melting I2t | 20000 A²s | |
| 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 | 39.8 mm | |
| Product Length | 133.4 mm | |
| Product Height | 49.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.0899 kg | |
| Sell Pack Width | 130 mm | |
| Sell Pack Length | 140 mm | |
| Sell Pack Height | 50 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.3633 kg | |
| Power Dissipation at Rated Current Value | 72 W | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen C300543 used for?
The Mersen C300543 is used to provide high-speed short-circuit protection for semiconductor devices and power electronic equipment.
Which components can the C300543 protect?
It is intended for the protection of sensitive components such as IGBTs, thyristors, rectifier diodes and semiconductor power modules.
Can the C300543 replace a standard industrial fuse?
It should only be used where its electrical ratings, operating characteristic, physical dimensions and terminal configuration match the requirements of the equipment. A standard general-purpose fuse may not provide sufficiently fast semiconductor protection.
How should I confirm the correct current and voltage ratings?
Check the markings on the existing fuse and compare them with the original equipment documentation or an official Mersen technical datasheet before ordering or installing a replacement.
Where is this fuse typically installed?
The fuse is typically installed inside industrial drives, power converters, rectifier equipment, control cabinets or other electrical systems containing semiconductor power devices.
Trusted Industrial Electrical Protection
Mersen high-speed fuses are used by equipment manufacturers, panel builders and maintenance engineers to protect critical semiconductor components and support reliable operation in demanding power electronic systems.
