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MERSEN FUSE A 070 URD 32 LI 0450 A070URD32LI0450
High-speed aR characteristic fuse with ceramic square body, rated 450A at 690VAC IEC and 700VAC UL, featuring striker indication and slotted blade terminals for industrial semiconductor protection.
£92.32
Why Choose the Mersen K300205 Protistor® High-Speed Fuse?
The Mersen K300205 is an industrial high-speed semiconductor fuse from the established Mersen Protistor® range. It is intended to provide rapid fault protection for sensitive power electronic components, including diodes, thyristors and IGBT modules used within demanding power-conversion equipment.
High-speed fuses operate more rapidly than conventional industrial fuses, limiting peak fault current and the amount of damaging energy passed to connected semiconductor devices. This can help reduce thermal stress, prevent extensive equipment damage and minimise costly production downtime following a short-circuit fault.
The K300205 is suitable for consideration in variable-speed drives, industrial converters, rectifiers, uninterruptible power supplies and similar power electronic systems. As publicly accessible technical data for this exact reference could not be reliably verified, its current rating, voltage rating, operating class, terminal configuration and dimensions must be confirmed against the product label or official Mersen documentation before purchase or installation.
Key Advantages
- High-speed protection for sensitive semiconductor devices.
- Rapid fault interruption helps limit damaging let-through energy.
- Suitable for industrial power-conversion and motor-control equipment.
- Helps reduce thermal and electrical stress on connected components.
- Robust industrial construction for demanding operating environments.
- Can help minimise equipment damage and unplanned downtime.
Key Features
- Mersen manufacturer reference K300205.
- Part of the Mersen high-speed semiconductor fuse portfolio.
- Designed for power electronic protection.
- Fast response to high short-circuit currents.
- Low energy let-through characteristics.
- Suitable for coordination with semiconductor modules.
- Industrial fuse construction for secure installation.
- Intended for use in correctly rated fuse mounting arrangements.
Reliable Protection for Industrial Power Electronics
Semiconductor components can be permanently damaged by fault energy before standard circuit-protection devices have time to operate. A correctly selected high-speed fuse interrupts the fault rapidly and limits the peak current and I²t energy experienced by the protected component.
Fuse selection must account for the equipment operating voltage, continuous and cyclic current, prospective short-circuit current, ambient temperature, cooling conditions, terminal arrangement and the withstand characteristics of the semiconductor module. A fuse should never be replaced solely on the basis of physical appearance.
Typical Applications
- Variable-speed and variable-frequency drives.
- Industrial AC and DC converters.
- IGBT inverter systems.
- Thyristor and diode rectifiers.
- Uninterruptible power supplies.
- Renewable energy conversion equipment.
- Motor control systems.
- Industrial automation 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 | K300205 | |
| Catalogue No | A070UD32LI450 | |
| Description | Square Body High-Speed Fuse Protistor® Size 32 aR 690VAC IEC 700VAC UL 450A With Striker Slotted Blades long | |
| EAN/UPC Code | 3605340324884 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 450 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 32 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 130 kA²s | |
| Melting I2t | 22 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 | 59 mm | |
| Product Length | 153 mm | |
| Product Height | 65 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.7199 kg | |
| Sell Pack Width | 160 mm | |
| Sell Pack Length | 195 mm | |
| Sell Pack Height | 72 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.5733 kg | |
| Power Dissipation at Rated Current Value | 80 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen K300205 used for?
The Mersen K300205 is intended for high-speed fault protection within industrial power electronic systems containing sensitive semiconductor components.
Which components can a high-speed fuse protect?
A correctly selected high-speed fuse can protect components such as IGBT modules, thyristors and power diodes against damaging short-circuit energy.
What is the current rating of the Mersen K300205?
The current rating for this exact reference could not be reliably verified from publicly accessible documentation. Check the fuse label or official Mersen datasheet before specifying a replacement.
Can the K300205 replace another fuse with the same dimensions?
Not necessarily. The current rating, voltage rating, operating class, breaking capacity, I²t values and terminal configuration must all match the equipment requirements.
How should the correct replacement fuse be selected?
Compare the complete manufacturer reference and all electrical and mechanical specifications with the original fuse and the equipment manufacturer's protection requirements.
Trusted Protection for Industrial Power Systems
Mersen high-speed fuses are used in industrial power electronic systems where rapid fault interruption and effective semiconductor coordination are essential.
