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MERSEN FUSE CC12 SRG 272 QF 400 D272SG120V400QF
High-speed DC fuse designed for semiconductor protection with 1200V DC rating and 400A current capacity, featuring a striker indication system for remote trip signalling.
£958.06
Why Choose the Mersen S077963 High-Speed Semiconductor Fuse?
The Mersen S077963 is a premium Protistor® square body high-speed semiconductor fuse engineered to provide rapid fault protection for sensitive power semiconductor devices operating in demanding DC applications. As part of the advanced Mersen Protistor® Size 2×72 aR 1200 VDC series, it delivers exceptional protection for railway, industrial and power conversion systems where reliability is critical.
Designed specifically for modern DC equipment, the S077963 features an ultra-fast aR characteristic that limits fault energy reaching IGBTs, thyristors and diodes. Its robust square body construction, integrated striker and low I²t performance help maximise equipment protection while reducing downtime and maintenance costs.
With a rated current of 400 A and a 1200 V DC IEC voltage rating, the Mersen S077963 is ideally suited for railway traction systems, industrial drives, energy storage equipment, UPS systems and other high-power DC applications requiring dependable semiconductor protection.
Key Advantages
- High-speed semiconductor protection fuse for demanding DC applications.
- 400 A current rating for high-power equipment.
- 1200 V DC IEC rated voltage suitable for modern power electronics.
- Ultra-fast aR characteristic helps minimise semiconductor damage.
- Integrated striker mechanism for fuse status indication.
- High 100 kA DC breaking capacity for reliable fault interruption.
Key Features
- Mersen Protistor® Size 2×72 aR series.
- 400 A rated current.
- 1200 V DC IEC rated voltage.
- 100 kA DC breaking capacity.
- Square body construction with flush terminals.
- Integrated striker for blown fuse indication.
- Low I²t design for enhanced semiconductor protection.
- Suitable for railway and industrial power conversion systems.
Reliable Protection for High-Power DC Equipment
High-speed semiconductor fuses are designed to interrupt fault currents before expensive semiconductor devices can be damaged. Their extremely low let-through energy protects critical components while helping maintain system uptime and reducing repair costs.
The Mersen Protistor® range is widely specified for railway traction equipment, industrial power converters, battery energy storage systems and renewable energy installations where dependable DC protection is essential.
Typical Applications
- Railway traction and auxiliary systems.
- Industrial DC drives and converters.
- Battery energy storage systems.
- UPS and backup power equipment.
- Renewable energy power conversion systems.
- Protection of IGBTs, thyristors and semiconductor modules.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Voltage | 120 V | |
| Fuse Type | Semiconductor | |
| Fuse Size | 2x72 mm | |
| Fuse Class | aR | |
| Item number | S077963 | |
| Catalogue No | D272SG120V400QF | |
| Description | Square Body High-Speed Fuse Protistor® Size 2x72 aR 1200VDC IEC 400A With Striker | |
| EAN/UPC Code | 3605340026658 | |
| Rated voltage DC IEC | 1200 V | |
| Ampere Rating | 400 A | |
| RoHS Compliant | Yes | |
| AC or DC | DC | |
| Speed/Characteristic | aR | |
| Fuse Size | 2x72 | |
| Mounting | Bolted | |
| Melting I2t | 14.9 kA²s | |
| Max. Rated Breaking Capacity DC | 100 kA | |
| Design Details | SRG | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Copper | |
| Connection/Terminal Type | L Brackets | |
| Product Width | 60 mm | |
| Product Length | 163 mm | |
| Product Height | 162.7 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 2.4 kg | |
| Sell Pack Width | 170 mm | |
| Sell Pack Length | 200 mm | |
| Sell Pack Height | 90 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 2.4 kg | |
| Power Dissipation at Rated Current Value | 185 W | |
| HS Code | 85351000 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen S077963 used for?
The S077963 is a high-speed semiconductor fuse designed to protect power electronic devices such as IGBTs, thyristors and diodes in high-power DC systems.
What is the current rating of this fuse?
The fuse has a 400 A rated current.
What voltage is the Mersen S077963 designed for?
It is rated for 1200 V DC (IEC) applications.
Does this fuse include a striker?
Yes, the S077963 includes an integrated striker to provide visual indication when the fuse has operated.
Where is the Mersen S077963 commonly installed?
It is commonly installed in railway systems, industrial converters, renewable energy equipment, UPS systems and other high-power semiconductor applications.
Trusted for High-Power Semiconductor Protection
Mersen Protistor® semiconductor fuses are trusted worldwide by engineers to deliver rapid fault protection, dependable reliability and outstanding performance in demanding industrial and railway power applications.
