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.
£240.96
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.
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.
| 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 |
The Mersen C300842 is used to provide high-speed short-circuit protection for semiconductor devices and industrial power electronic equipment.
It is intended for applications involving sensitive components such as IGBTs, thyristors, SCRs, rectifier diodes and semiconductor power modules.
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.
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.
It is typically installed within industrial drives, converters, rectifiers, power supplies, control cabinets and other equipment containing semiconductor power devices.
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.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...