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MERSEN FUSE 12 URD 73 PA 0700 B301784
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.
£171.32
Why Choose the Mersen B301784 PC73UD12C700PA High-Speed Fuse?
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.
Key Advantages
- Ultra-fast aR semiconductor fuse for short-circuit protection.
- 700 A current rating for demanding industrial applications.
- 1200 V AC IEC / 1300 V AC UL voltage rating.
- High breaking capacity of 150 kA.
- Integrated striker indicator for fuse status monitoring.
- Silver-plated terminals provide excellent conductivity and durability.
Key Features
- Mersen Protistor® Size 73 aR series.
- 700 A rated current.
- 1200 V AC IEC / 1300 V AC UL.
- Square body fuse with plain blade terminals.
- Integrated striker indication system.
- Die-cut silver fuse elements with solidified silica sand.
- Designed specifically for semiconductor protection.
- Clip mounting configuration.
Reliable Protection for High-Power Electronics
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.
Typical Applications
- Variable frequency drives.
- Industrial power converters.
- UPS systems.
- Renewable energy inverters.
- Motor control centres.
- Industrial automation equipment.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1200 V | |
| 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 |
Frequently Asked Questions
What is the Mersen B301784 used for?
It provides ultra-fast short-circuit protection for semiconductor devices including IGBTs, thyristors, diodes and rectifiers used in industrial power electronics.
What is the current rating of this fuse?
The Mersen B301784 has a rated current of 700 A.
What voltage is this fuse designed for?
It is rated for 1200 V AC (IEC) and 1300 V AC (UL).
Does the fuse include a striker indicator?
Yes. It features an integrated striker indicator that can be used with a compatible microswitch for remote indication.
Where is this fuse commonly installed?
It is widely installed in industrial drives, converters, UPS systems, renewable energy equipment and other semiconductor-based power conversion systems.
Trusted for Semiconductor Protection Worldwide
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.
