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MERSEN FUSE A 110 URD 71 LLI 0630 A110URD71LLI0630
High-speed aR fuse designed for semiconductor protection with striker indication and bolted mounting, rated 630A at 1000VAC IEC and 1100VAC UL.
£115.06
Why Choose the Mersen P300669 Protistor® High-Speed Fuse?
The Mersen P300669 is a specialist high-speed semiconductor protection fuse developed for use in demanding industrial power-electronic equipment. As part of Mersen’s established Protistor® range, it is intended to help protect sensitive semiconductor components against damaging short-circuit and overcurrent conditions.
High-speed semiconductor fuses are designed to operate rapidly and limit the thermal and electrical energy transferred to connected equipment during a fault. This makes the P300669 suitable for compatible systems incorporating valuable components such as diodes, thyristors, rectifiers, GTOs and insulated-gate bipolar transistors.
The Mersen P300669 manufacturer reference allows maintenance engineers, panel builders, OEMs and purchasing teams to identify the required replacement component accurately. The fuse’s full current rating, voltage rating, utilisation category, breaking capacity, I²t performance, dimensions and terminal configuration should be checked against the existing component or current Mersen technical documentation before installation.
Key Advantages
- High-speed protection for sensitive semiconductor devices.
- Rapid fault interruption helps reduce damage to power electronics.
- Low let-through energy supports effective equipment protection.
- Suitable for demanding industrial power-conversion applications.
- Genuine Mersen component identified by part number P300669.
- Suitable for maintenance, replacement and OEM production requirements.
Key Features
- Mersen Protistor® semiconductor fuse technology.
- Manufacturer part number P300669.
- High-speed operating characteristic for semiconductor protection.
- Designed to restrict fault-current duration and let-through energy.
- Suitable for compatible diode, thyristor, rectifier, GTO and IGBT circuits.
- Robust construction for professional industrial environments.
- Compatible with the appropriate equipment-specific mounting arrangement.
- Suitable for replacement, maintenance and original equipment applications.
Reliable Protection for Power Electronics
Power-semiconductor devices can suffer permanent damage within milliseconds when exposed to excessive fault current. Dedicated high-speed fuses are therefore used to interrupt faults rapidly and restrict the energy reaching sensitive electronic components.
The Mersen P300669 is intended to provide dependable protection within compatible motor-control and power-conversion equipment. Correct fuse selection is essential, so the required current rating, voltage rating, breaking capacity, utilisation category, I²t values, dimensions and terminal arrangement must be verified before ordering or installation.
Typical Applications
- Variable speed and variable frequency drives.
- Industrial rectifiers and power converters.
- Uninterruptible power supply systems.
- Motor drives and soft-start equipment.
- Industrial inverters and battery-charging systems.
- Automation and power distribution equipment.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1000 V | |
| Item number | P300669 | |
| Catalogue No | A110UD71LLI630 | |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1000VAC IEC 1100VAC UL 630A With Striker Slotted Blades long | |
| EAN/UPC Code | 3605340331882 | |
| Rated voltage AC UL | 1100 V | |
| Rated voltage AC IEC | 1000 V | |
| Ampere Rating | 630 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 71 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 725 kA²s | |
| Melting I2t | 126 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 167 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | Slotted Blades | |
| Product Width | 51 mm | |
| Product Length | 157.4 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.62 kg | |
| Sell Pack Width | 155 mm | |
| Sell Pack Length | 165 mm | |
| Sell Pack Height | 60 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.54 kg | |
| Power Dissipation at Rated Current Value | 120 W |
Frequently Asked Questions
What is the Mersen P300669 used for?
The P300669 is a high-speed fuse intended to protect compatible semiconductor devices and industrial power-electronic equipment against damaging short-circuit and overcurrent conditions.
Which components can the P300669 protect?
High-speed semiconductor fuses are commonly used to protect diodes, thyristors, rectifiers, GTOs and IGBTs within industrial power-conversion equipment.
Is the P300669 suitable for variable speed drives?
It may be suitable for compatible variable speed drives when its complete electrical ratings, operating characteristics, dimensions and terminal configuration match the equipment manufacturer’s requirements.
How should P300669 compatibility be confirmed?
Compare the complete part number, current rating, voltage rating, breaking capacity, utilisation category, I²t values, dimensions and terminal arrangement with the existing fuse and current Mersen documentation.
Who should install the Mersen P300669?
The fuse should be selected and installed by a suitably qualified electrical engineer or technician in accordance with applicable safety requirements and equipment manufacturer instructions.
Trusted by Power Electronics Professionals Worldwide
Mersen Protistor® fuses are specified by electrical engineers, OEM manufacturers and industrial maintenance teams for dependable high-speed protection of valuable power-electronic equipment.
