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MERSEN FUSE CC 7,5 GRC 121 TTF 0200 CC7BODKC3GRC121TTC200M
High-speed 200A, 750VDC fuse with striker indication and flush end silver-plated brass terminals, designed for DC semiconductor protection and industrial applications.
£390.61
Why Choose the Mersen N085250 High-Speed Semiconductor Fuse?
The Mersen N085250 (D121GC75V200TF) is a Protistor® Size 121 square body high-speed semiconductor fuse designed to provide exceptional protection for power semiconductor devices used in railway traction systems, industrial DC converters, battery energy storage systems and renewable energy installations. Engineered specifically for demanding DC applications, it rapidly interrupts fault currents to minimise damage to valuable power electronic components while maximising system reliability.
Rated at 200 A with a 750 V DC (IEC) voltage rating, the N085250 features a gR operating characteristic, providing full-range protection against both overloads and short circuits. It incorporates flush-end metric threaded terminals together with an integrated striker indicator for secure installation and simplified maintenance.
As part of the proven Mersen Protistor® semiconductor protection range, the N085250 has been developed for modern high-performance DC equipment operating at elevated temperatures, offering low I²t characteristics, reduced power losses and long service life in demanding industrial environments.
Key Advantages
- High-speed gR semiconductor protection for overload and short-circuit conditions.
- 200 A current rating with 750 V DC IEC operation.
- 100 kA DC breaking capacity for dependable fault interruption.
- Low I²t characteristics help minimise damage to semiconductor devices.
- Integrated striker indicator enables rapid fuse status identification.
- Designed for railway, industrial DC, renewable energy and battery storage applications.
Key Features
- Mersen Protistor® Size 121 semiconductor fuse.
- Manufacturer reference: N085250.
- Catalogue number: D121GC75V200TF.
- Square body ceramic construction.
- Flush-end metric threaded terminals.
- Integrated striker indication.
- Bolted installation.
- RoHS compliant.
Designed for High-Performance DC Power Systems
High-speed semiconductor fuses are specifically engineered to protect IGBTs, diodes, thyristors and other sensitive power electronic devices by limiting fault energy before damaging levels are reached. Their rapid current-limiting performance helps improve equipment reliability, reduce repair costs and minimise operational downtime.
The Protistor® Size 121 series is widely used in railway auxiliary systems, industrial power converters, renewable energy installations and battery energy storage systems where dependable semiconductor protection is essential.
Typical Applications
- Railway traction and auxiliary power systems.
- Industrial DC converters and inverters.
- Battery energy storage systems (BESS).
- Renewable energy power conversion equipment.
- Protection of IGBTs, thyristors and diodes.
- High-power semiconductor installations.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | gR | |
| Voltage | 750 V | |
| Item number | N085250 | |
| Catalogue No | D121GC75V200TF | |
| Description | Square Body High-Speed Fuse Protistor® Size 121 gR 750VDC IEC 200A With Striker Flush ends metric threads | |
| EAN/UPC Code | 3605340067729 | |
| Rated voltage DC IEC | 750 V | |
| Ampere Rating | 200 A | |
| RoHS Compliant | Yes | |
| AC or DC | DC | |
| Speed/Characteristic | gR | |
| Fuse Size | 121 | |
| Mounting | Bolted | |
| Melting I2t | 11.85 kA²s | |
| Max. Rated Breaking Capacity DC | 100 kA | |
| Design Details | gRC | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Brass | |
| Connection/Terminal Type | Flush ends | |
| Product Width | 51 mm | |
| Product Length | 131 mm | |
| Product Height | 55 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 0.88 kg | |
| Sell Pack Width | 110 mm | |
| Sell Pack Length | 200 mm | |
| Sell Pack Height | 60 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.88 kg | |
| Power Dissipation at Rated Current Value | 37.5 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen N085250 used for?
The Mersen N085250 protects semiconductor devices used in railway equipment, industrial converters, renewable energy systems and battery energy storage installations.
What are the electrical ratings?
The fuse is rated at 200 A, 750 V DC (IEC) and provides a 100 kA DC breaking capacity.
What does the gR operating characteristic mean?
The gR characteristic provides full-range semiconductor protection against both overload and short-circuit conditions.
Does this fuse include a blown-fuse indicator?
Yes. The N085250 incorporates an integrated striker mechanism that provides clear indication after fuse operation.
Which applications is this fuse suitable for?
It is suitable for railway systems, industrial DC converters, renewable energy installations, battery storage systems and other high-power semiconductor protection applications.
Trusted Protection for Critical Power Electronics
Mersen Protistor® semiconductor fuses are trusted worldwide to deliver rapid, dependable protection for power electronic equipment operating in transportation, industrial automation, renewable energy and energy storage applications.
