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MERSEN FUSE 6,9 URD 33 D11 A 0700 6,9URD33D11A0700
High-speed Protistor® fuse with 700A rating, aR characteristic, integrated striker for remote indication, and DIN 110 blades for secure mounting. Suitable for semiconductor protection in industrial applications.
£121.97
Why Choose the Mersen W300261 High-Speed Semiconductor Fuse?
The Mersen W300261 is a specialist high-speed semiconductor fuse intended to protect sensitive power electronic components against damaging short-circuit currents. Designed for industrial electrical systems, it provides rapid fault interruption and effective current limitation to help protect valuable semiconductor devices and associated equipment.
Power semiconductor components can be damaged by excessive thermal and electrical energy within a fraction of a second. The Mersen W300261 is designed to respond rapidly under fault conditions, reducing peak current and limiting the energy transferred to components such as diodes, thyristors, rectifiers, IGBTs and power conversion modules.
The W300261 is suitable for maintenance, repair and OEM replacement requirements involving industrial drives, converters, inverters and power supplies. Before installation, the complete product reference, current rating, voltage rating, utilisation category, breaking capacity and mounting configuration should be verified against the original fuse marking or the applicable Mersen technical documentation.
Key Advantages
- High-speed fuse designed for semiconductor protection.
- Rapid short-circuit interruption helps protect sensitive power components.
- Current-limiting performance reduces damaging let-through energy.
- Supports dependable operation of industrial power conversion equipment.
- Suitable for planned maintenance, repairs and OEM replacement applications.
- Manufactured by Mersen, a specialist in industrial electrical protection.
Key Features
- Mersen high-speed semiconductor fuse.
- Manufacturer reference W300261.
- Designed for rapid short-circuit fault interruption.
- Supports coordinated protection of power semiconductor devices.
- Helps limit thermal and electrical stress during fault conditions.
- Suitable for drives, converters, rectifiers and industrial power supplies.
- Compatible with the correctly rated fuse holder or mounting assembly.
- Intended for professional industrial installation and replacement.
Reliable Protection for Industrial Power Electronics
High-speed semiconductor fuses are engineered to interrupt fault currents before excessive heat and electrical stress can permanently damage power electronic components. Effective current limitation can also help reduce secondary damage to connected busbars, cables, contactors and control equipment.
The Mersen W300261 should be selected as part of a properly coordinated electrical protection system. Circuit voltage, continuous operating current, prospective short-circuit current, ambient temperature, mounting conditions and the energy withstand capability of the protected semiconductor devices must all be considered.
Typical Applications
- Variable frequency drives and motor control systems.
- 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 | W300261 | |
| Catalogue No | PC33UD69V700D1A | |
| Description | Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 700A With Striker DIN 110 Blades | |
| EAN/UPC Code | 3605340325959 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 700 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 33 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 330 kA²s | |
| Melting I2t | 57 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Design Details | Standard Terminal | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | DIN 110 Blades | |
| Product Width | 73 mm | |
| Product Length | 134.6 mm | |
| Product Height | 78.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 2.622 kg | |
| Sell Pack Width | 140 mm | |
| Sell Pack Length | 240 mm | |
| Sell Pack Height | 90 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.874 kg | |
| Power Dissipation at Rated Current Value | 125 W | |
| HS Code | 85361090 |
Frequently Asked Questions
What is the Mersen W300261 used for?
The Mersen W300261 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 W300261?
It may be used in appropriately rated variable frequency drives, converters, inverters, rectifiers, industrial power supplies and other systems containing sensitive semiconductor components.
Can the W300261 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 the correct electrical rating be verified?
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 W300261?
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 high-speed fuses are used in industrial power electronic systems where rapid fault interruption, effective current limitation and dependable semiconductor protection are essential.
