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MERSEN FUSE A 070 URD 30 LI 0350 A070URD30LI0350
High-speed aR characteristic fuse designed for semiconductor protection with integrated striker and slotted blade terminals, rated 350A at 690VAC IEC and 700VAC UL.
£122.01
Why Choose the Mersen W300146 Protistor® Fuse?
The Mersen W300146 is a specialist high-speed semiconductor fuse intended for the protection of sensitive power electronic components and industrial electrical equipment. As part of Mersen’s established Protistor® fuse range, it is designed to interrupt damaging fault currents rapidly and limit the electrical energy reaching semiconductor devices.
High-speed fuses are essential in applications where conventional industrial fuses may not operate quickly enough to protect diodes, thyristors, rectifiers, IGBTs and other power semiconductor components. The Mersen W300146 supports reliable short-circuit protection in appropriately rated drives, converters, inverters and industrial power supplies.
Its industrial construction makes the W300146 suitable for maintenance, repair and OEM replacement applications. Because electrical ratings and connection formats can vary between Mersen semiconductor fuse variants, the complete part number, voltage rating, current rating, fuse class and mounting dimensions should be checked against the original fuse marking or equipment documentation before installation.
Key Advantages
- High-speed fuse designed for semiconductor protection.
- Rapid fault interruption helps protect sensitive power components.
- Current-limiting performance reduces damaging let-through energy.
- Supports reliable operation of industrial drives and power converters.
- Suitable for OEM replacement and electrical maintenance applications.
- Manufactured by Mersen, a specialist in industrial electrical protection.
Key Features
- Mersen Protistor® semiconductor fuse range.
- Manufacturer reference W300146.
- High-speed short-circuit protection characteristic.
- Designed for coordinated protection of power semiconductor devices.
- Helps limit thermal and electrical stress during fault conditions.
- Suitable for industrial power conversion equipment.
- Compatible with an appropriately rated fuse mounting arrangement.
- Intended for professional industrial installation and replacement.
Reliable Protection for Industrial Power Electronics
Power semiconductor devices can be damaged by excessive fault energy in a fraction of a second. High-speed semiconductor fuses are engineered to respond rapidly, limiting peak current and reducing the amount of thermal energy transferred to valuable electronic components.
The Mersen W300146 should be selected as part of a coordinated protection system that considers circuit voltage, continuous operating current, prospective short-circuit current, ambient temperature and the energy withstand capability of the protected components. Installation and replacement should be completed by a suitably qualified electrical professional.
Typical Applications
- Variable frequency drives and motor control equipment.
- Industrial power converters.
- Rectifier and inverter assemblies.
- Uninterruptible power supply systems.
- Industrial automation machinery.
- Semiconductor switching circuits.
- Power distribution and control panels.
- OEM power electronic equipment.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | W300146 | |
| Catalogue No | A070UD30LI350 | |
| Description | Square Body High-Speed Fuse Protistor® Size 30 aR 690VAC IEC 700VAC UL 350A With Striker Slotted Blades long | |
| EAN/UPC Code | 3605340323917 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 350 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 30 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 86 kA²s | |
| Melting I2t | 15.5 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | Slotted Blades | |
| Product Width | 40 mm | |
| Product Length | 148.6 mm | |
| Product Height | 48 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 0.9639 kg | |
| Sell Pack Width | 133 mm | |
| Sell Pack Length | 157 mm | |
| Sell Pack Height | 54 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.3213 kg | |
| Power Dissipation at Rated Current Value | 60 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen W300146 used for?
The Mersen W300146 is used to provide high-speed short-circuit protection for semiconductor devices installed in industrial power electronic equipment.
What types of equipment can use the W300146?
It may be used in appropriately rated variable speed drives, converters, inverters, rectifiers, industrial power supplies and other systems containing sensitive semiconductor components.
Can the W300146 be replaced with a standard industrial fuse?
A standard fuse should not be used as a substitute unless its voltage, current, breaking capacity, mounting format and semiconductor protection performance have been verified as equivalent.
How should I verify the electrical rating?
Check the current, voltage, utilisation category and breaking-capacity markings on the original fuse, then compare them with the equipment manual or applicable Mersen technical documentation.
Who should install the Mersen W300146?
The fuse should be selected and installed by a qualified electrical professional familiar with high-speed semiconductor protection and the relevant industrial equipment.
Trusted Semiconductor Protection from Mersen
Mersen Protistor® fuses are used in industrial power electronic systems where fast fault interruption, effective current limitation and dependable semiconductor protection are essential.
