High-speed Protistor® fuse with 630A rating, integrated striker for remote indication, suitable for industrial power electronics protection.
£191.76
The Mersen N300553, catalogue number PC71UD10C630D1A, is a Protistor® Size 71 square body high-speed semiconductor protection fuse designed to provide exceptional short-circuit protection for modern power electronic equipment. Featuring an ultra-fast aR operating characteristic, it is specifically engineered to protect IGBTs, thyristors, diodes and other semiconductor devices used in demanding industrial power conversion applications.
Rated at 630 A, with a 1000 V AC IEC and 1100 V AC UL voltage rating, the N300553 delivers excellent current limitation and low let-through energy (I²t), helping minimise damage during fault conditions while maximising equipment reliability. The fuse incorporates die-cut silver fuse elements embedded in solidified sand for outstanding arc control and interrupting performance.
Designed with DIN 110 blade terminals and an integrated striker indicator, the Mersen N300553 is ideal for variable frequency drives, industrial converters, UPS systems, renewable energy installations and other high-power semiconductor applications requiring dependable circuit protection.
Protistor® high-speed semiconductor fuses are designed to interrupt high fault currents before excessive thermal energy can damage expensive semiconductor devices. Their low let-through energy, high interrupting capacity and precision-engineered construction help maximise equipment reliability while reducing maintenance costs and unplanned downtime.
The Mersen N300553 is widely specified by OEMs, machine builders and maintenance engineers protecting industrial drives, renewable energy converters, UPS systems and other high-power electronic equipment.
| Current | 11 A |
|---|---|
| Item number | N300553 |
| Catalogue No | PC71UD10C630D1A |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1000VAC IEC 1100VAC UL 630A With Striker DIN 110 Blades |
| EAN/UPC Code | 3605340330113 |
| Rated voltage AC UL | 1100 V |
| Rated voltage AC IEC | 1000 V |
| Ampere Rating | 630 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 71 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 725 kA²s |
| Melting I2t | 125 kA²s |
| AC Max I.R./Breaking Capacity | I1: 167 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 | 133.4 mm |
| Product Height | 56.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 1.56 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 | 0.52 kg |
| Power Dissipation at Rated Current Value | 120 W |
| HS Code | 85361090 |
The Mersen N300553 is designed to protect IGBTs, thyristors, SCRs, diodes and other semiconductor devices against damaging short-circuit faults.
The Mersen N300553 has a continuous current rating of 630 A.
It is rated for 1000 V AC (IEC) and 1100 V AC (UL).
Yes. The fuse incorporates an integrated striker indicator for remote fuse status indication using compatible accessories.
The aR characteristic identifies an ultra-fast semiconductor protection fuse designed specifically to provide short-circuit protection for sensitive semiconductor devices.
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, machine builders and maintenance engineers for delivering reliable, high-speed protection of critical industrial power electronic equipment.
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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...