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MERSEN FUSE CC12 SRG 72 QF 200 CC12BODKCV35RG72Q200M
High-speed Protistor® fuse engineered for reliable protection of DC circuits up to 1200V with 200A rating, featuring aR characteristic, integrated striker, and L bracket terminals.
£468.40
Why Choose the Mersen L079429 High-Speed Semiconductor Fuse?
The Mersen L079429 (D72SG120V200QF) is a Protistor® Size 72 square body high-speed semiconductor fuse designed to provide exceptional protection for power semiconductors, railway traction equipment, battery energy storage systems and high-power DC circuits. Engineered specifically for demanding DC applications, it delivers rapid fault interruption while minimising damage to sensitive electronic components.
Rated at 200 A and 1200 V DC (IEC), the fuse features an aR operating characteristic for semiconductor short-circuit protection, an integrated striker indicator for remote status indication and robust silver-plated copper L-bracket terminals for secure bolted installation. Its low I²t characteristics and low power losses help maximise equipment protection and operational reliability.
As part of the Mersen Protistor® semiconductor protection range, the L079429 is optimised for modern power conversion equipment operating at elevated temperatures, offering outstanding current limitation and long service life in demanding industrial environments.
Key Advantages
- High-speed aR semiconductor protection for DC power electronics.
- 200 A current rating and 1200 V DC IEC voltage rating.
- Extremely low I²t to minimise semiconductor damage.
- 100 kA DC breaking capacity for high fault-current interruption.
- Integrated striker indicator for simplified maintenance.
- Silver-plated copper L-bracket terminals provide secure electrical connections.
Key Features
- Mersen Protistor® Size 72 semiconductor fuse.
- Manufacturer reference: L079429.
- Catalogue number: D72SG120V200QF.
- Square body ceramic fuse construction.
- Bolted mounting arrangement.
- Integrated striker indication system.
- High-speed DC semiconductor protection.
- RoHS compliant.
Reliable Protection for High-Power DC Systems
High-speed semiconductor fuses are specifically engineered to protect sensitive power electronic devices including IGBTs, diodes, thyristors and converters. Their extremely fast fault-clearing performance limits the energy passing into protected devices, reducing repair costs and improving overall system reliability.
The Mersen Protistor® range is widely used in railway traction, renewable energy installations, battery storage systems, industrial converters and EV charging infrastructure where dependable semiconductor protection is essential.
Typical Applications
- Railway traction systems.
- Battery energy storage systems (BESS).
- Industrial DC converters.
- Renewable energy power conversion.
- Electric vehicle charging infrastructure.
- Protection of high-power semiconductor devices.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1200 V | |
| Item number | L079429 | |
| Catalogue No | D72SG120V200QF | |
| Description | Square Body High-Speed Fuse Protistor® Size 72 aR 1200VDC IEC 200A With Striker L Brackets | |
| EAN/UPC Code | 3605340033953 | |
| Rated voltage DC IEC | 1200 V | |
| Ampere Rating | 200 A | |
| RoHS Compliant | Yes | |
| AC or DC | DC | |
| Speed/Characteristic | aR | |
| Fuse Size | 72 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 21 kA²s | |
| Max. Rated Breaking Capacity DC | 100 kA | |
| Design Details | SRG | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | L Brackets | |
| Product Width | 60 mm | |
| Product Length | 163 mm | |
| Product Height | 76.5 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 1.15 kg | |
| Sell Pack Width | 130 mm | |
| Sell Pack Length | 200 mm | |
| Sell Pack Height | 95 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 1.15 kg | |
| Power Dissipation at Rated Current Value | 88 W | |
| HS Code | 85351000 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen L079429 used for?
The Mersen L079429 is a high-speed semiconductor fuse designed to protect power electronic equipment, railway systems, industrial converters and other high-power DC applications.
What are the electrical ratings?
The fuse is rated at 200 A with a 1200 V DC (IEC) voltage rating and a 100 kA DC breaking capacity.
What does the aR operating characteristic mean?
The aR characteristic provides short-circuit protection for semiconductor devices while overload protection is provided elsewhere within the electrical system.
Does the fuse include a blown-fuse indicator?
Yes. The L079429 incorporates an integrated striker indicator for fast identification after fuse operation.
Which applications is this fuse suitable for?
It is suitable for railway traction equipment, battery storage, renewable energy converters, industrial DC systems, EV charging infrastructure and other semiconductor protection applications.
Trusted by High-Power System Designers Worldwide
Mersen Protistor® semiconductor fuses are trusted worldwide to provide fast, dependable protection for critical power electronics used in industrial automation, transportation, renewable energy and energy storage applications.
