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MERSEN FUSE 6,9 GRB 71 D11A 0450 PC71GB69V450D1A
High-speed Protistor® fuse with gR characteristic, 690VAC, 450A rating, featuring striker indication and DIN 110 blade terminals in a ceramic square body.
£102.53
Why Choose the Mersen R301637 Protistor® High-Speed Fuse?
The Mersen R301637, catalogue number PC71GB69V450D1A, is a premium square body semiconductor protection fuse engineered to provide exceptionally fast fault interruption for modern power electronic equipment. As part of the renowned Mersen Protistor® Size 71 gR 690 VAC series, this fuse offers full-range protection against overloads and short circuits, making it ideal for demanding industrial applications.
Manufactured using pure silver fuse elements embedded in solidified silica sand, the R301637 delivers excellent current limiting performance with low let-through energy (I²t). Silver-plated contact surfaces, non-magnetic hardware and an integrated striker indicator ensure dependable operation while simplifying maintenance and system monitoring.
With a rated current of 450 A and a 690 V AC IEC voltage rating, the Mersen R301637 is ideally suited to protecting converters, variable speed drives, UPS systems and other critical semiconductor-based equipment operating in industrial environments.
Key Advantages
- High-speed gR semiconductor protection fuse for complete overload and short circuit protection.
- 450 A current rating for high-power industrial applications.
- 690 V AC IEC rated voltage suitable for demanding power systems.
- Integrated striker indicator for local or remote fuse status indication.
- DIN 110 blade terminals provide secure bolted installation.
- Low I²t characteristics help minimise damage to expensive semiconductor devices.
Key Features
- Mersen Protistor® Size 71 gR series.
- Catalogue number: PC71GB69V450D1A.
- 450 A rated current.
- 690 V AC IEC voltage rating.
- Full-range gR semiconductor protection.
- Integrated striker indication.
- Silver-plated DIN 110 blade terminals.
- Square body bolted fuse construction.
Reliable Protection for High-Power Electronics
High-speed semiconductor fuses are designed to interrupt fault currents before sensitive power electronic devices can be damaged. Their extremely fast operating characteristics reduce thermal stress, improve equipment reliability and help minimise costly downtime in industrial installations.
The Protistor® range is trusted throughout industry for protecting inverters, motor drives, UPS systems and renewable energy equipment where dependable semiconductor protection is essential for safe, continuous operation.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial power converters.
- UPS and backup power systems.
- Renewable energy inverters.
- Motor control equipment.
- Industrial automation systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | gR | |
| Voltage | 690 V | |
| Item number | R301637 | |
| Catalogue No | PC71GB69V450D1A | |
| Description | Square Body High-Speed Fuse Protistor® Size 71 gR 690VAC IEC 450A With Striker DIN 110 Blades | |
| EAN/UPC Code | 3605340344431 | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 450 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | gR | |
| Fuse Size | 71 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 360 kA²s | |
| Melting I2t | 61.7 kA²s | |
| 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 | 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 | 61 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen R301637 used for?
The R301637 protects semiconductor devices and power electronic equipment against overloads and short circuit faults.
What is the current rating of this fuse?
This fuse has a 450 A rated current.
What voltage is the R301637 designed for?
The fuse is designed for systems operating at 690 V AC IEC.
What type of terminals does this fuse use?
The Mersen R301637 features DIN 110 blade terminals for secure bolted installation.
Does this fuse include a blown fuse indicator?
Yes. The fuse incorporates an integrated striker indicator that can be used with compatible monitoring accessories.
Trusted by Industrial Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted worldwide for delivering rapid fault protection, outstanding current limiting performance and reliable protection of critical power electronic equipment.
