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MERSEN FUSE A 070 URD 31 LI 0315 A070URD31LI0315
High-speed fuse with aR characteristic designed for semiconductor protection, rated at 315A with 690VAC IEC and 700VAC UL voltage ratings. Features long slotted blades with striker indication and ceramic body.
£82.61
Why Choose the Mersen X300699 Protistor® High-Speed Fuse?
The Mersen X300699 is a specialist high-speed semiconductor protection fuse designed for the rapid interruption of short-circuit currents in industrial power electronic equipment. Products within the Mersen Protistor® range are engineered to protect sensitive semiconductor components such as IGBTs, thyristors, rectifier diodes and power converters.
Its ultra-fast operating behaviour helps restrict peak fault current and energy let-through before excessive thermal or electrical stress can damage valuable semiconductor devices. This makes the Mersen X300699 suitable for installations where dependable fault protection, reduced equipment downtime and long-term operational reliability are essential.
The exact electrical rating and mechanical configuration of the Mersen X300699 could not be confirmed from publicly indexed manufacturer information. The fuse should therefore be selected and installed only after its current rating, voltage rating, utilisation category, terminal arrangement and dimensions have been checked against the original Mersen product label or technical documentation.
Key Advantages
- High-speed protection for sensitive semiconductor components.
- Helps minimise damaging fault-current energy let-through.
- Designed for demanding industrial power electronic systems.
- Supports improved equipment reliability and reduced downtime.
- Suitable for replacement and maintenance applications requiring Mersen SKU X300699.
- Manufactured as part of Mersen's established semiconductor protection portfolio.
Key Features
- Mersen Protistor® semiconductor fuse technology.
- Ultra-fast response to high short-circuit currents.
- Designed to protect IGBTs, thyristors and power diodes.
- Low energy let-through characteristics.
- Industrial-grade construction.
- Suitable for power conversion and motor-control equipment.
- Replacement product identified by manufacturer SKU X300699.
- Electrical and dimensional compatibility must be verified before installation.
Reliable Semiconductor Protection
Semiconductor devices can be damaged by fault currents in a fraction of the operating time of a conventional industrial fuse. High-speed semiconductor fuses are therefore engineered with rapid melting and low energy let-through characteristics, helping to isolate faults before excessive thermal energy reaches the protected components.
Correct fuse selection must consider the circuit voltage, operating current, semiconductor withstand capability, prospective short-circuit current, cooling conditions and expected load cycle. The Mersen X300699 should only be used where its verified technical ratings match the requirements of the equipment manufacturer.
Typical Applications
- Variable frequency drives and motor-control systems.
- Industrial power converters and rectifiers.
- Uninterruptible power supply systems.
- Renewable energy converters and inverters.
- Battery energy storage power electronics.
- Industrial automation and semiconductor switching equipment.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | X300699 | |
| Catalogue No | A070UD31LI315 | |
| Description | Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 315A With Striker Slotted Blades long | |
| EAN/UPC Code | 3605340332414 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 315 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 31 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 44000 A²s | |
| Melting I2t | 7500 A²s | |
| 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 | 51 mm | |
| Product Length | 148.6 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.2519 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 | 0.4173 kg | |
| Power Dissipation at Rated Current Value | 65 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen X300699 used for?
The Mersen X300699 is intended for high-speed protection of sensitive semiconductor devices used in industrial power conversion and control equipment.
What components can the X300699 protect?
Depending on the equipment design, it may be used to protect IGBTs, thyristors, rectifier diodes and other power semiconductor modules.
What is the current rating of the Mersen X300699?
The current rating could not be confirmed from publicly indexed manufacturer information. It should be checked against the fuse label, original equipment documentation or an official Mersen datasheet before purchase.
Can the X300699 be replaced with another semiconductor fuse?
A replacement should match the verified current rating, voltage rating, utilisation category, breaking capacity, time-current performance, dimensions and terminal configuration. Matching physical size alone is not sufficient.
Where is the Mersen X300699 typically installed?
High-speed Mersen fuses are commonly installed in drives, converters, rectifiers, UPS equipment, renewable energy systems and other industrial power electronic assemblies.
Trusted Protection for Industrial Power Electronics
Mersen Protistor® high-speed fuses are designed to help safeguard critical semiconductor equipment through rapid fault interruption and controlled energy let-through. Always confirm the complete X300699 rating and configuration before installation.
