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MERSEN FUSE CC 7,5 GRC 122 TTF 0315 D122GC75V315TF
High-speed gR characteristic fuse designed for semiconductor protection in DC applications up to 750V and 315A, featuring a striker indication system and flush end silver-plated brass terminals.
£379.57
Why Choose the Mersen M085249 High-Speed Semiconductor Fuse?
The Mersen M085249 (D122GC75V315TF) is a Protistor® Size 122 square body high-speed semiconductor fuse designed to deliver exceptional protection for power semiconductors, railway traction equipment and high-power DC applications. Engineered for demanding environments, it rapidly clears fault currents while minimising damage to sensitive semiconductor devices, improving system reliability and reducing downtime.
Rated at 315 A with a 750 V DC (IEC) voltage rating, this fuse features a gR operating characteristic, providing both overload and short-circuit protection for semiconductor devices. Its square body design incorporates flush metric threaded terminals and an integrated striker indicator for easy status monitoring and maintenance.
As part of the Mersen Protistor® DC semiconductor protection range, the M085249 is specifically developed for modern railway auxiliary circuits, industrial converters, battery energy storage systems and renewable energy installations operating under demanding DC conditions.
Key Advantages
- High-speed gR semiconductor protection for overload and short-circuit conditions.
- 315 A current rating with 750 V DC IEC operation.
- 100 kA DC breaking capacity for dependable fault interruption.
- Low I²t characteristics help minimise semiconductor damage.
- Integrated striker indicator for rapid fuse status identification.
- Designed for railway, industrial DC power conversion and energy storage applications.
Key Features
- Mersen Protistor® Size 122 semiconductor fuse.
- Manufacturer reference: M085249.
- Catalogue number: D122GC75V315TF.
- Square body ceramic fuse construction.
- Flush metric threaded terminals.
- Integrated striker indication.
- High-speed DC semiconductor protection.
- RoHS compliant.
Reliable Protection for High-Power DC Systems
High-speed semiconductor fuses are specifically designed to protect sensitive power electronic devices including IGBTs, diodes, thyristors and converters. Their extremely rapid fault-clearing performance limits the energy reaching protected components, helping reduce repair costs, improve equipment reliability and minimise operational downtime.
The Mersen Protistor® range is widely used in railway traction systems, battery energy storage installations, renewable energy equipment and industrial DC converters where dependable semiconductor protection is essential for continuous operation.
Typical Applications
- Railway traction and auxiliary power systems.
- Battery energy storage systems (BESS).
- Industrial DC converters.
- Renewable energy power conversion equipment.
- Electric vehicle charging infrastructure.
- Protection of high-power semiconductor devices.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | gR | |
| Voltage | 750 V | |
| Item number | M085249 | |
| Catalogue No | D122GC75V315TF | |
| Description | Square Body High-Speed Fuse Protistor® Size 122 gR 750VDC IEC 315A With Striker Flush ends metric threads | |
| EAN/UPC Code | 3605340067712 | |
| Rated voltage DC IEC | 750 V | |
| Ampere Rating | 315 A | |
| RoHS Compliant | Yes | |
| AC or DC | DC | |
| Speed/Characteristic | gR | |
| Fuse Size | 122 | |
| Mounting | Bolted | |
| Melting I2t | 30.06 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 | 59 mm | |
| Product Length | 131 mm | |
| Product Height | 63 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 1.43 kg | |
| Sell Pack Width | 130 mm | |
| Sell Pack Length | 200 mm | |
| Sell Pack Height | 90 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 1.43 kg | |
| Power Dissipation at Rated Current Value | 58 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen M085249 used for?
The Mersen M085249 is designed to protect semiconductor devices in railway systems, industrial converters, battery energy storage systems and other demanding high-power DC applications.
What are the electrical ratings of the M085249?
This fuse is rated at 315 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 protection for semiconductor devices, offering both overload and short-circuit protection.
Does this fuse include a blown-fuse indicator?
Yes. The M085249 incorporates an integrated striker mechanism that provides clear indication after fuse operation.
Which applications is this fuse suitable for?
It is suitable for railway traction equipment, industrial converters, renewable energy systems, battery storage installations and other high-power semiconductor protection applications.
Trusted by High-Power System Designers Worldwide
Mersen Protistor® semiconductor fuses are trusted worldwide to provide rapid, dependable protection for critical power electronics used in transportation, renewable energy, industrial automation and energy storage applications.
