High-speed aR fuse with 1800A rating, compliant with IEC and UL standards, featuring striker indication and slotted blade terminals for industrial semiconductor protection.
£392.10
The Mersen H301077 is a high performance Protistor® square body high-speed semiconductor fuse engineered to provide exceptional protection for power semiconductor devices used in industrial power conversion systems. Designed for rapid fault interruption, it helps protect sensitive components such as IGBTs, thyristors, diodes and rectifiers from damaging short-circuit currents.
As part of the trusted Mersen Protistor® Size 33 aR series, the H301077 delivers high interrupting performance and low let-through energy, making it ideal for demanding industrial applications including variable speed drives, UPS systems, converters and other power electronic equipment. The fuse incorporates a striker mechanism and long slotted blade terminals for straightforward installation into compatible fuse holders.
With a 1800 A current rating and 600 V AC IEC / 650 V AC UL voltage rating, the H301077 provides dependable semiconductor protection while helping minimise equipment damage and production downtime in critical industrial environments.
High-speed semiconductor fuses are specifically designed to interrupt extremely high fault currents before they can damage expensive power electronic devices. Their ultra-fast operation and low let-through energy make them an essential component in converters, inverters, soft starters and industrial drive systems.
The Mersen Protistor® range is trusted worldwide by OEMs and electrical engineers for protecting modern semiconductor equipment operating in demanding industrial environments.
| Item number | H301077 |
|---|---|
| Catalogue No | A065UD33LI1800 |
| Description | Square Body High-Speed Fuse Protistor® Size 33 aR 600VAC IEC 650VAC UL 1800A With Striker Slotted Blades long |
| EAN/UPC Code | 3605340336467 |
| Rated voltage AC UL | 650 V |
| Rated voltage AC IEC | 600 V |
| Ampere Rating | 1800 A |
| RoHS Compliant | Yes |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 33 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 3870 kA²s |
| Melting I2t | 720 kA²s |
| AC Max I.R./Breaking Capacity | I1: 200 kA |
| Design Details | Reinforced Terminal |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Copper |
| Connection/Terminal Type | Slotted Blades |
| Product Width | 73 mm |
| Product Length | 153 mm |
| Product Height | 78.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 2.6298 kg |
| Sell Pack Width | 160 mm |
| Sell Pack Length | 250 mm |
| Sell Pack Height | 90 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.8766 kg |
| Power Dissipation at Rated Current Value | 260 W |
| HS Code | 85361090 |
The H301077 is a high-speed semiconductor fuse designed to protect IGBTs, thyristors, diodes and other power electronic components from short-circuit faults.
The fuse has a 1800 A current rating for high power industrial applications.
It is rated at 600 V AC (IEC) and 650 V AC (UL).
The aR characteristic provides ultra-fast short-circuit protection for semiconductor devices and is intended specifically for protecting power electronics.
The H301077 is commonly installed in variable speed drives, converters, UPS systems, inverters and other industrial power conversion equipment.
Mersen Protistor® semiconductor fuses are trusted globally for delivering rapid fault protection, helping maximise equipment reliability and minimise downtime in industrial power conversion applications.
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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...