Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE A 070 URD 32 LI 0500 A070URD32LI0500
High-speed fuse delivering dependable circuit protection for industrial and power electronics applications with 690VAC IEC and 700VAC UL ratings at 500A, featuring striker indication and slotted blade terminals.
£95.99
Why Choose the Mersen L300206 Protistor® High-Speed Fuse?
The Mersen L300206, catalogue number A070UD32LI500, is a high-performance Protistor® square body semiconductor fuse designed to protect sensitive power electronic equipment against damaging short-circuit currents. Its ultra-fast aR operating characteristic makes it suitable for safeguarding IGBTs, thyristors, diodes and other semiconductor devices.
Part of the Mersen Protistor® Size 32 range, the L300206 combines low let-through energy with a high interrupting capacity. The fuse uses precision die-cut elements embedded in solidified sand to control arcing, reduce I²t and provide rapid fault clearance in demanding industrial power conversion applications.
With a 500 A current rating, 690 V AC IEC rating and 700 V AC UL rating, the L300206 is suitable for industrial drives, converters, UPS equipment and renewable energy systems. Its long slotted blade terminals and integrated striker provide secure bolted installation and clear fuse-operation indication.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 500 A current rating for industrial power electronics.
- 690 V AC IEC and 700 V AC UL voltage ratings.
- Very low I²t helps reduce damage to sensitive semiconductors.
- High interrupting capacity for demanding fault conditions.
- Integrated striker indicator supports fault monitoring.
Key Features
- Mersen Protistor® Size 32 series.
- Catalogue number: A070UD32LI500.
- 500 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR ultra-fast fuse characteristic.
- Long slotted blade terminal configuration.
- Silver-plated contact surfaces.
- Non-magnetic installation hardware.
- Integrated low-voltage striker indicator.
- Square ceramic body with bolted mounting.
Ultra-Fast Protection for Power Electronics
Semiconductor devices can be damaged by fault currents that rise too quickly for conventional industrial fuses to interrupt safely. The Mersen L300206 is engineered to operate rapidly and limit the thermal and electrical energy reaching protected components during a short circuit.
Its low I²t performance and current-limiting operation help protect expensive power conversion equipment while reducing the risk of extensive secondary damage. The robust ceramic square body, solidified sand filling and silver-plated contacts provide dependable performance in industrial environments with frequent load cycling.
Typical Applications
- Variable speed and variable frequency drives.
- Industrial rectifiers and power converters.
- IGBT, thyristor and diode protection.
- Uninterruptible power supply systems.
- Renewable energy inverters.
- Battery chargers and energy storage systems.
- Industrial heating and power control equipment.
- Machine automation and power electronic assemblies.
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 | L300206 | |
| Catalogue No | A070UD32LI500 | |
| Description | Square Body High-Speed Fuse Protistor® Size 32 aR 690VAC IEC 700VAC UL 500A With Striker Slotted Blades long | |
| EAN/UPC Code | 3605340324907 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 500 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 32 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 160 kA²s | |
| Melting I2t | 28 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 | 90 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen L300206 used for?
The L300206 is an ultra-fast square body fuse designed to protect IGBTs, thyristors, diodes and other semiconductor devices used in industrial power electronics.
What is the current rating of the Mersen L300206?
The Mersen L300206 has a rated current of 500 A.
What voltage is the L300206 rated for?
The fuse is rated for 690 V AC under IEC specifications and 700 V AC under UL specifications.
What does the aR fuse classification mean?
The aR classification identifies a partial-range fuse designed for short-circuit protection of semiconductor devices. It provides extremely fast operation and low energy let-through.
What does the integrated striker do?
The striker provides a mechanical indication when the fuse has operated and may be paired with a compatible microswitch for remote fault signalling.
Trusted Protection for Critical Power Electronics
Mersen Protistor® high-speed fuses are trusted by electrical engineers, machine builders and power electronics manufacturers to deliver rapid fault interruption, low energy let-through and dependable semiconductor protection.
