High-speed fuse designed for semiconductor protection with 630A rating at 690VAC IEC and 700VAC UL, featuring striker indication and DIN 110 blades for bolted mounting.
£178.26
The Mersen Q300026 is a genuine Protistor® Size 31 square body high-speed semiconductor fuse engineered to provide exceptional protection for sensitive power electronic devices in demanding industrial applications. Identified by the catalogue number PC31UD69V630D1A, this ultra-fast aR characteristic fuse is specifically designed to protect semiconductors including IGBTs, thyristors and diodes against damaging short-circuit currents.
As part of the renowned Mersen Protistor® Size 31 series, the Q300026 combines rapid fault clearing, high breaking capacity and low let-through energy to maximise equipment reliability and minimise costly downtime. Its robust ceramic square body, silver-plated contacts and integrated striker indicator make it ideal for modern power conversion equipment and industrial automation systems.
With a 630 A current rating, 690 V AC IEC and 700 V AC UL voltage rating, the Mersen Q300026 is ideally suited to protecting variable speed drives, UPS systems, converters, inverters, motor drives and other semiconductor-based power equipment.
High-speed semiconductor fuses are specifically designed to protect sensitive power electronic components from destructive short-circuit currents before permanent damage occurs. Their exceptionally low let-through energy helps extend equipment life while reducing maintenance costs and unplanned downtime in industrial installations.
The Mersen Protistor® range is trusted worldwide for protecting variable frequency drives, UPS systems, rectifiers, converters, soft starters, renewable energy equipment and other semiconductor-based power electronics requiring fast and dependable circuit protection.
| Current | 11 A |
|---|---|
| Item number | Q300026 |
| Catalogue No | PC31UD69V630D1A |
| Description | Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 630A With Striker DIN 110 Blades |
| EAN/UPC Code | 3605340322507 |
| Rated voltage AC UL | 700 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 630 A |
| RoHS Compliant | Yes |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 31 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 430000 A²s |
| Melting I2t | 75000 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 | 85 W |
| HS Code | 85361090 |
| Country of Manufacture | France |
The Mersen Q300026 protects semiconductor devices such as IGBTs, thyristors and diodes from damaging short-circuit currents in industrial power conversion equipment.
The fuse has a 630 A rated current.
The Q300026 is rated for 690 V AC (IEC) and 700 V AC (UL).
The aR operating characteristic provides ultra-fast protection specifically for semiconductor devices against short-circuit faults.
Yes. The Q300026 includes an integrated striker indicator for simplified fuse monitoring and maintenance.
Mersen Protistor® semiconductor fuses are trusted by OEMs, panel builders and industrial engineers to provide dependable protection for modern power electronic equipment 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...