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MERSEN FUSE CC 7,5 GRC 120 TTF 0050 B220824
Engineered for demanding DC protection, this 50A, 750VDC Protistor® fuse delivers rapid response to overloads and short circuits, ensuring reliable safeguarding of high-value components in industrial and renewable energy applications.
£269.72
Why Choose the Mersen B220824 High-Speed Fuse?
The Mersen B220824 (D120GC75V50TF) is a high-performance Protistor® square body semiconductor fuse designed to provide fast and dependable protection for power semiconductors, converters and DC electrical systems. Engineered for demanding industrial applications, this high-speed fuse offers outstanding fault current limitation while helping safeguard sensitive semiconductor devices from short-circuit damage.
Part of the proven Mersen Protistor® Size 120 gR 750 V DC series, the B220824 is ideal for railway traction equipment, auxiliary power circuits, battery energy storage systems and industrial power conversion applications. Its square body construction, low power dissipation and high interrupting capability provide reliable long-term performance in critical installations.
With a 50 A current rating, 750 V DC IEC voltage rating and gR operating class, the B220824 delivers full-range semiconductor protection. An integrated striker indicator simplifies maintenance by providing clear fuse status indication when replacement is required.
Key Advantages
- High-speed semiconductor protection fuse for DC power applications.
- 50 A current rating for power electronic equipment.
- 750 V DC IEC voltage rating for demanding industrial systems.
- gR full-range protection for semiconductor devices.
- Integrated striker indicator for easy maintenance.
- Low I²t performance helps minimise damage during fault conditions.
Key Features
- Mersen Protistor® Size 120 series.
- Square body high-speed fuse.
- 50 A rated current.
- 750 V DC IEC rated voltage.
- gR operating class.
- Flush end connections with metric threads.
- Integrated striker indication.
- Designed for railway and industrial DC power systems.
Reliable Protection for DC Power Electronics
High-speed semiconductor fuses are specifically designed to protect sensitive electronic devices from high fault currents. Their rapid operation and low let-through energy help minimise equipment damage, reduce downtime and improve the reliability of industrial power systems.
The Mersen Protistor® range is widely specified for protecting converters, inverters, rectifiers, battery systems and railway equipment where dependable semiconductor protection is essential for continuous operation.
Typical Applications
- Railway traction systems.
- Auxiliary DC power circuits.
- Industrial power converters.
- Battery energy storage systems.
- Variable speed drives and inverters.
- Semiconductor protection in industrial automation.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | gR | |
| Voltage | 750 V | |
| Item number | B220824 | |
| Catalogue No | D120GC75V50TF | |
| Description | Square Body High-Speed Fuse Protistor® Size 120 gR 750VDC IEC 50A With Striker Flush ends metric threads | |
| EAN/UPC Code | 3605340247152 | |
| Rated voltage DC IEC | 750 V | |
| Ampere Rating | 50 A | |
| RoHS Compliant | Yes | |
| AC or DC | DC | |
| Speed/Characteristic | gR | |
| Fuse Size | 120 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 8.5 kA²s | |
| Melting I2t | 0.665 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 | 40 mm | |
| Product Length | 127 mm | |
| Product Height | 45 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 0.65 kg | |
| Sell Pack Width | 110 mm | |
| Sell Pack Length | 210 mm | |
| Sell Pack Height | 70 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.65 kg | |
| Power Dissipation at Rated Current Value | 8.1 W | |
| HS Code | 85361050 |
Frequently Asked Questions
What is the Mersen B220824 used for?
The B220824 is designed to protect semiconductor devices in DC power systems, converters, inverters and railway electrical equipment.
What is the current rating of this fuse?
This fuse has a 50 A current rating.
What voltage is the fuse rated for?
The Mersen B220824 is rated for 750 V DC operation.
What does the gR classification mean?
The gR operating class provides full-range protection for semiconductor devices against overloads and short circuits.
Does this fuse include a blown fuse indicator?
Yes. The B220824 includes an integrated striker indicator to simplify maintenance and fuse replacement.
Trusted by Power Electronics Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted throughout industry for delivering reliable protection of sensitive power electronic equipment, helping maximise equipment uptime and minimise damage during electrical faults.
