High-speed aR fuse with integrated striker indication, rated 280A, 1200VAC IEC, 1300VAC UL, featuring DIN 110 blade terminals and ceramic body for industrial semiconductor protection.
£124.33
The Mersen J300710 is a premium Protistor® Size 70 aR square body high-speed semiconductor fuse designed to provide advanced protection for modern power conversion equipment. Specifically engineered for safeguarding sensitive semiconductor devices, it delivers ultra-fast fault interruption and excellent current limiting to protect IGBTs, thyristors, GTOs, rectifiers and power diodes against damaging short-circuit currents.
Part of Mersen's globally trusted Protistor® semiconductor fuse range, the J300710 features pure silver fuse elements embedded in solidified sand, silver-plated contact surfaces and an integrated striker for remote indication. This robust construction provides dependable performance in demanding industrial environments while helping reduce maintenance costs and unplanned downtime.
With a 280 A rated current and a 1200 V AC IEC / 1300 V AC UL voltage rating, the J300710 is ideal for industrial drives, converters, inverters, UPS systems, renewable energy installations and other high-power semiconductor applications requiring reliable circuit protection.
High-speed semiconductor fuses are specifically engineered to interrupt fault currents before excessive thermal or electrical energy reaches sensitive semiconductor devices. Their low let-through energy helps improve equipment reliability while reducing maintenance costs and minimising unplanned downtime.
The Mersen Protistor® Size 70 range is trusted worldwide by OEMs, panel builders and industrial engineers for demanding power conversion applications where dependable semiconductor protection is essential.
| Current | 11 A |
|---|---|
| Item number | J300710 |
| Catalogue No | PC70UD12C280D1A |
| Description | Square Body High-Speed Fuse Protistor® Size 70 aR 1200VAC IEC 1300VAC UL 280A With Striker DIN 110 Blades |
| EAN/UPC Code | 3605340332520 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1200 V |
| Ampere Rating | 280 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 70 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 106000 A²s |
| Melting I2t | 14200 A²s |
| AC Max I.R./Breaking Capacity | I1: 150 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Copper |
| Connection/Terminal Type | DIN 110 Blades |
| Product Width | 39.8 mm |
| Product Length | 133.4 mm |
| Product Height | 49.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 1.0899 kg |
| Sell Pack Width | 130 mm |
| Sell Pack Length | 140 mm |
| Sell Pack Height | 50 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.3633 kg |
| Power Dissipation at Rated Current Value | 64 W |
| HS Code | 85351000 |
The J300710 is designed to protect power semiconductor devices such as IGBTs, thyristors, GTOs, rectifiers and diodes from damaging short-circuit currents.
The fuse has a rated current of 280 A for industrial semiconductor protection applications.
It is rated for 1200 V AC (IEC) and 1300 V AC (UL) systems.
The aR operating characteristic provides ultra-fast short-circuit protection specifically for semiconductor devices without overload protection.
It is commonly installed in industrial drives, converters, UPS systems, renewable energy equipment and other high-power power conversion applications.
Mersen Protistor® semiconductor fuses are trusted worldwide for delivering dependable, ultra-fast protection for industrial power electronics, helping maximise equipment availability and protect valuable semiconductor devices.
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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...