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MERSEN FUSE A 070 URD 30 LI 0450 A070URD30LI0450
High-speed aR characteristic fuse with long slotted blades and striker indication for semiconductor protection, rated 450A, 690VAC IEC, 700VAC UL.
£130.15
Why Choose the Mersen K300527 Protistor® High-Speed Fuse?
The Mersen K300527 (A070UD30LI450) is a premium square body high-speed semiconductor fuse from the trusted Protistor® Size 30 series. Featuring an ultra-fast aR operating characteristic, it has been specifically engineered to protect sensitive semiconductor devices including IGBTs, thyristors, diodes and MOSFETs used in demanding industrial power conversion applications.
Manufactured using Mersen's advanced Protistor® technology, the K300527 provides rapid fault interruption with exceptionally low let-through energy, helping minimise damage to expensive semiconductor components during short-circuit conditions. Its ceramic square body, silver-plated contacts and solidified quartz sand construction deliver excellent electrical performance, high interrupting capacity and dependable long-term reliability.
Rated at 450 A with a 690 V AC IEC / 700 V AC UL voltage rating, this fuse features long slotted blade terminals with an integrated striker indicator, making it ideal for variable speed drives, UPS systems, industrial converters, rectifiers and renewable energy installations.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 450 A current rating for demanding industrial applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Protects IGBTs, thyristors, diodes and MOSFET devices.
- 200 kA breaking capacity for dependable fault interruption.
- Integrated striker indicator for remote fuse monitoring.
Key Features
- Mersen Protistor® Size 30 series.
- Catalogue number A070UD30LI450.
- 450 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- Long slotted blade terminals.
- Integrated striker indicator.
- Silver-plated contact surfaces.
- Ceramic body with solidified quartz sand arc-quenching technology.
- Low I²t for optimum semiconductor protection.
Reliable Semiconductor Protection for Industrial Power Systems
High-speed semiconductor fuses are specifically engineered to interrupt fault currents before expensive power electronic components can be damaged. Their ultra-fast operation and low let-through energy improve equipment reliability while reducing maintenance costs and unplanned downtime. Mersen's Protistor® range is widely specified by OEMs for industrial drives, converters, UPS systems and renewable energy equipment.
Typical Applications
- Variable speed drives.
- Industrial power converters.
- IGBT inverter protection.
- Thyristor and diode rectifiers.
- UPS systems.
- Renewable energy inverters.
- Motor control centres.
- Industrial automation equipment.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | K300527 | |
| Catalogue No | A070UD30LI450 | |
| Description | Square Body High-Speed Fuse Protistor® Size 30 aR 690VAC IEC 700VAC UL 450A With Striker Slotted Blades long | |
| EAN/UPC Code | 3605340329797 | |
| 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 | 30 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 165 kA²s | |
| Melting I2t | 26 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 | 88 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen K300527 used for?
It provides ultra-fast protection for semiconductor devices including IGBTs, thyristors, MOSFETs and power diodes used in industrial power conversion equipment.
What is the current rating of this fuse?
The Mersen K300527 has a 450 A current rating.
What voltage is this fuse designed for?
The fuse is rated for 690 V AC (IEC) and 700 V AC (UL).
Does this fuse include an indicator?
Yes. It incorporates an integrated striker indicator that can operate a compatible microswitch for remote fuse status indication.
What applications is this fuse suitable for?
It is ideal for protecting semiconductors in industrial drives, converters, UPS systems, renewable energy installations and other high-power electronic equipment.
Trusted by Industrial Power Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs and industrial engineers for delivering reliable protection, high interrupting capacity and dependable performance in demanding power electronic applications.
