High-speed fuse providing reliable semiconductor protection up to 700A and 700VAC with striker indication and slotted blade terminals.
£205.92
The Mersen E300706, catalogue number A070UD31LI700, is a premium square body high-speed semiconductor fuse engineered to provide ultra-fast protection for today's power electronic equipment. As part of the trusted Mersen Protistor® Size 31 series, this fuse is specifically designed to protect IGBTs, thyristors, diodes and other semiconductor devices against damaging short circuits and fault currents. Featuring long slotted blade terminals with an integrated striker indicator, it delivers reliable performance in demanding industrial environments.
Manufactured using precision die-cut fuse elements embedded in solidified silica sand, together with silver-plated contact surfaces and non-magnetic hardware, the E300706 provides exceptionally low let-through energy (I²t) and excellent current-limiting performance. This advanced construction helps minimise damage to expensive semiconductor devices while improving system reliability and reducing costly downtime.
With a 700 A current rating, 690 V AC IEC rating and 700 V AC UL rating, the Mersen E300706 is ideally suited for variable frequency drives, UPS systems, renewable energy inverters, industrial power converters, rectifiers and automation equipment requiring dependable semiconductor protection.
High-speed semiconductor fuses are engineered to interrupt fault currents before sensitive power semiconductors can be damaged. The Mersen Protistor® Size 31 range delivers extremely fast fault interruption with low I²t values, making it ideal for protecting variable speed drives, renewable energy systems, UPS equipment and industrial power converters while improving reliability and reducing maintenance costs.
The E300706 is widely used in industrial motor drives, renewable energy inverter systems, battery energy storage systems (BESS), UPS installations, rectifiers and automation equipment where dependable semiconductor protection is essential.
| Item number | E300706 |
|---|---|
| Catalogue No | A070UD31LI700 |
| Description | Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 700A With Striker Slotted Blades long |
| EAN/UPC Code | 3605340332483 |
| Rated voltage AC UL | 700 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 700 A |
| RoHS Compliant | Yes |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 31 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 540000 A²s |
| Melting I2t | 95000 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 | 95 W |
| HS Code | 85361090 |
| Country of Manufacture | France |
The E300706 provides ultra-fast protection for semiconductor devices including IGBTs, thyristors and diodes used in industrial power conversion equipment.
The Mersen E300706 has a 700 A rated current.
It is rated for 690 V AC (IEC) and 700 V AC (UL) applications.
The fuse features long slotted blade terminals with an integrated striker indicator for secure installation and convenient remote monitoring.
It is commonly installed in industrial drives, renewable energy systems, UPS installations, converters and other high-performance power electronic equipment.
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, panel builders and industrial engineers to deliver dependable protection for critical power electronic equipment operating in demanding industrial environments.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...