High-speed aR characteristic fuse designed for semiconductor protection with 500A rating, 690VAC IEC and 700VAC UL rated voltage, featuring integrated striker and DIN 110 blade terminals.
£156.99
The Mersen N300024, catalogue number PC31UD69V500D1A, is a premium square body high-speed semiconductor protection fuse engineered to provide exceptional protection for power electronic equipment. As part of the trusted Mersen Protistor® Size 31 series, this ultra-fast aR fuse is specifically designed to safeguard sensitive semiconductor devices including diodes, thyristors, IGBTs and power converters.
Designed for demanding industrial applications, the N300024 combines rapid fault interruption with high breaking capacity to minimise damage caused by short circuits. Its silver-plated contacts, solidified sand construction and precision-manufactured fuse elements provide dependable performance, while the integrated striker enables remote indication and enhanced maintenance capabilities.
With a 500 A current rating and a 690 V AC IEC / 700 V AC UL voltage rating, the Mersen N300024 is ideal for protecting variable speed drives, UPS systems, DC drives, renewable energy equipment and industrial power conversion systems. The DIN 110 blade terminals allow straightforward installation into compatible fuse bases and switchgear assemblies.
Semiconductor protection fuses are engineered to clear high fault currents before sensitive electronic components are damaged. Their ultra-fast response significantly reduces thermal and mechanical stress, helping maximise equipment reliability and minimise costly downtime.
The Mersen Protistor® range has become a preferred choice for industrial engineers and OEM manufacturers requiring dependable protection for modern power conversion equipment operating in demanding electrical environments.
| Current | 11 A |
|---|---|
| Item number | N300024 |
| Catalogue No | PC31UD69V500D1A |
| Description | Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 500A With Striker DIN 110 Blades |
| EAN/UPC Code | 3605340322484 |
| 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 | 31 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 215000 A²s |
| Melting I2t | 37000 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 | DIN 110 Blades |
| Product Width | 51 mm |
| Product Length | 134.6 mm |
| Product Height | 56.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 1.2429 kg |
| Sell Pack Width | 142 mm |
| Sell Pack Length | 166 mm |
| Sell Pack Height | 62 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.4143 kg |
| Power Dissipation at Rated Current Value | 72 W |
| HS Code | 85361090 |
| Country of Manufacture | France |
The Mersen N300024 is designed to protect semiconductor devices such as IGBTs, SCRs, thyristors and diodes against high fault currents in industrial power electronic equipment.
The fuse has a 500 A continuous current rating.
It is rated for 690 V AC (IEC) and 700 V AC (UL).
The aR classification indicates an ultra-fast semiconductor protection fuse intended to provide short-circuit protection for sensitive electronic components.
Yes. The N300024 features an integrated striker that provides fuse operation indication and can be used with compatible microswitch accessories.
Mersen Protistor® high-speed semiconductor fuses are trusted worldwide by OEMs, machine builders and industrial engineers for protecting critical power electronic equipment with fast, reliable fault interruption.
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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...