High-speed fuse delivering reliable short-circuit protection for power semiconductor devices, rated 700A, 1200VAC IEC, 1300VAC UL with striker indication and plain blade terminals.
£285.53
The Mersen B301784 PC73UD12C700PA is a premium square body high-speed semiconductor fuse designed to provide ultra-fast protection for sensitive power electronic equipment. Part of the renowned Mersen Protistor® Size 73 aR series, it delivers exceptional short-circuit protection for semiconductor devices including IGBTs, thyristors, diodes and rectifiers used in modern industrial power conversion systems.
Manufactured using die-cut silver fuse elements embedded in solidified silica sand, the fuse offers excellent current limiting performance, low let-through energy and a high breaking capacity. Silver-plated contact surfaces and non-magnetic hardware ensure dependable long-term operation in demanding industrial environments.
With a 700 A current rating, 1200 V AC IEC rating and 1300 V AC UL rating, the B301784 is ideally suited for high-power drives, converters, UPS systems, renewable energy equipment and industrial automation applications requiring reliable semiconductor protection.
High-speed semiconductor fuses are designed to interrupt fault currents before sensitive semiconductor devices can be damaged. Their exceptionally fast operating characteristics help reduce thermal stress, minimise downtime and protect valuable power conversion equipment.
The Protistor® Size 73 range is trusted by OEMs and industrial engineers for use in converters, inverters, drives and renewable energy installations where dependable fault protection is critical.
| Item number | B301784 |
|---|---|
| Catalogue No | PC73UD12C700PA |
| Description | Square Body High-Speed Fuse Protistor® Size 73 aR 1200VAC IEC 1300VAC UL 700A With Striker Plain Blades |
| EAN/UPC Code | 3605340346572 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1200 V |
| Ampere Rating | 700 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 73 |
| Mounting | Clip |
| Clearing I2t At Rated Voltage | 900 kA²s |
| Melting I2t | 110 kA²s |
| 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 | Plain Blades |
| Product Width | 73 mm |
| Product Length | 149.4 mm |
| Product Height | 78.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 3.48 kg |
| Sell Pack Width | 160 mm |
| Sell Pack Length | 245 mm |
| Sell Pack Height | 100 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 1.16 kg |
| Power Dissipation at Rated Current Value | 146 W |
| HS Code | 85351000 |
It provides ultra-fast short-circuit protection for semiconductor devices including IGBTs, thyristors, diodes and rectifiers used in industrial power electronics.
The Mersen B301784 has a rated current of 700 A.
It is rated for 1200 V AC (IEC) and 1300 V AC (UL).
Yes. It features an integrated striker indicator that can be used with a compatible microswitch for remote indication.
It is widely installed in industrial drives, converters, UPS systems, renewable energy equipment and other semiconductor-based power conversion systems.
Mersen Protistor® high-speed semiconductor fuses are trusted worldwide by OEMs, panel builders and industrial engineers to provide reliable protection for critical power electronic equipment.
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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...