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MERSEN FUSE 12,5 URD 72 PA 0450 C300842
High-speed fuse delivering reliable short-circuit protection for power semiconductors with 450A rating, 1250VAC IEC and 1300VAC UL voltage ratings, featuring plain blade terminals and integrated striker indication.
£144.58
Why Choose the Mersen C300842 High-Speed Semiconductor Fuse?
The Mersen C300842 is an industrial high-speed semiconductor fuse designed to protect sensitive power electronic components against damaging short-circuit currents. It is intended for equipment containing semiconductor devices such as IGBTs, thyristors, SCRs, rectifier diodes and power modules.
High-speed fuses operate more rapidly than conventional general-purpose fuses, helping limit the thermal and electrical energy transferred to protected components during a fault. This specialised current-limiting performance can reduce secondary equipment damage, improve system reliability and minimise costly downtime in industrial power-conversion and motor-control installations.
The Mersen C300842 fuse is suitable for maintenance, repair and replacement applications where its electrical ratings, utilisation category, dimensions and terminal arrangement match the original component. The rated current, voltage, breaking capacity and mounting configuration should be verified from the fuse markings or official Mersen technical documentation before installation.
Key Advantages
- High-speed semiconductor protection for industrial power electronics.
- Rapid fault interruption helps minimise damage to sensitive components.
- Low let-through energy supports effective short-circuit protection.
- Current-limiting performance can reduce thermal and electrical stress.
- Suitable for power-conversion, motor-control and automation equipment.
- Manufactured by Mersen, a recognised electrical-protection specialist.
Key Features
- Mersen C300842 industrial fuse.
- High-speed operating characteristic for semiconductor applications.
- Designed to limit damaging short-circuit current and fault energy.
- Suitable for protecting IGBTs, SCRs, thyristors and rectifier diodes.
- Industrial construction for installation within electrical equipment.
- Compatible with an appropriately rated fuse holder or mounting assembly.
- Suitable for original-equipment maintenance and replacement applications.
- Engineered for dependable protection of power electronic systems.
Reliable Protection for Industrial Power Electronics
Power semiconductor devices can be damaged by fault currents before conventional circuit-protection products have time to operate. High-speed fuses such as the Mersen C300842 are designed to interrupt these currents rapidly, reducing the amount of damaging energy that reaches sensitive electronic components.
Correct fuse selection is essential for safe and reliable operation. Any replacement fuse should match the required current rating, voltage rating, utilisation category, breaking capacity, dimensions and terminal arrangement specified by the equipment manufacturer.
Typical Applications
- Variable frequency drives and industrial motor controllers.
- Power converters and inverter systems.
- Rectifier and thyristor assemblies.
- Uninterruptible power supply equipment.
- Industrial automation and control systems.
- Renewable-energy power-conversion equipment.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1250 V | |
| Item number | C300842 | |
| Catalogue No | PC72UD13C450PA | |
| Description | Square Body High-Speed Fuse Protistor® Size 72 aR 1250VAC IEC 1300VAC UL 450A With Striker Plain Blades | |
| EAN/UPC Code | 3605340334371 | |
| Rated voltage AC UL | 1300 V | |
| Rated voltage AC IEC | 1250 V | |
| Ampere Rating | 450 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 72 | |
| Mounting | Clip | |
| Clearing I2t At Rated Voltage | 360 kA²s | |
| Melting I2t | 44.2 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 | Plain Blades | |
| Product Width | 59 mm | |
| Product Length | 149.4 mm | |
| Product Height | 63 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 2.3298 kg | |
| Sell Pack Width | 160 mm | |
| Sell Pack Length | 202 mm | |
| Sell Pack Height | 80 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.7766 kg | |
| Power Dissipation at Rated Current Value | 89 W | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen C300842 used for?
The Mersen C300842 is used to provide high-speed short-circuit protection for semiconductor devices and industrial power electronic equipment.
Which components can the C300842 protect?
It is intended for applications involving sensitive components such as IGBTs, thyristors, SCRs, rectifier diodes and semiconductor power modules.
Can the C300842 replace a general-purpose fuse?
It should only be installed where its electrical ratings, operating characteristic, dimensions and terminal configuration match the equipment requirements. A general-purpose fuse may not provide sufficiently rapid semiconductor protection.
How can I confirm the current and voltage ratings?
Check the markings printed on the original fuse and compare them with the equipment documentation or an official Mersen technical datasheet before ordering a replacement.
Where is this fuse typically installed?
It is typically installed within industrial drives, converters, rectifiers, power supplies, control cabinets and other equipment containing semiconductor power devices.
Trusted Industrial Electrical Protection
Mersen high-speed fuses are specified by equipment manufacturers, panel builders and maintenance engineers to protect critical semiconductor components in demanding industrial power electronic systems.
