Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE CC 7,5 GRD 122 TTF 0450 CC7BODKCAGRD122TTC450M
High-speed gR characteristic fuse rated at 450A and 750VDC with ceramic body, striker indication, and flush end silver-plated brass terminals for industrial DC applications.
£445.50
Why Choose the Mersen R220953 High-Speed Semiconductor Fuse?
The Mersen R220953 is a high-performance Protistor® square body high-speed semiconductor fuse engineered to provide exceptional protection for power semiconductor devices in demanding DC applications. Designed as part of the trusted Mersen Protistor® Size 122 gR 750 VDC series, it delivers rapid fault interruption to help minimise damage to sensitive components and improve system reliability.
Developed for modern power conversion systems, railway applications and industrial DC equipment, the R220953 combines fast-acting protection with low power losses and high breaking capacity. Its robust square body construction with flush metric threaded terminals and integrated striker makes installation straightforward while ensuring dependable operation in harsh industrial environments.
Rated at 450 A with a 750 V DC IEC voltage rating, the Mersen R220953 is ideal for protecting semiconductor devices including IGBTs, thyristors, diodes and DC power electronics where rapid fault clearance is essential.
Key Advantages
- High-speed semiconductor protection fuse for critical DC applications.
- 450 A current rating for demanding industrial power systems.
- 750 V DC IEC voltage rating for modern power electronics.
- Ultra-fast operation helps minimise damage to expensive semiconductor devices.
- Integrated striker mechanism for fuse operation indication.
- High breaking capacity for reliable fault protection.
Key Features
- Mersen Protistor® Size 122 gR series.
- 450 A rated current.
- 750 V DC IEC rated voltage.
- 100 kA DC breaking capacity.
- Square body design with flush metric threaded terminals.
- Integrated striker for fuse status indication.
- Low I²t for superior semiconductor protection.
- Designed for railway, industrial and power conversion equipment.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are specifically designed to protect sensitive power electronic components from damaging short circuits. Their extremely fast response limits fault energy, helping reduce equipment damage and minimise system downtime.
The Mersen Protistor® range is trusted worldwide across railway traction systems, industrial drives, UPS equipment, renewable energy installations and power conversion systems where dependable semiconductor protection is essential.
Typical Applications
- Semiconductor power converters.
- Railway traction and auxiliary power systems.
- Industrial DC drives.
- UPS and battery energy storage systems.
- Renewable energy inverters.
- Protection of IGBTs, thyristors and power semiconductor modules.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | gR | |
| Voltage | 750 V | |
| Item number | R220953 | |
| Catalogue No | D122GD75V450TF | |
| Description | Square Body High-Speed Fuse Protistor® Size 122 gR 750VDC IEC 450A With Striker Flush ends metric threads | |
| EAN/UPC Code | 3605340248371 | |
| Rated voltage DC IEC | 750 V | |
| Ampere Rating | 450 A | |
| RoHS Compliant | Yes | |
| AC or DC | DC | |
| Speed/Characteristic | gR | |
| Fuse Size | 122 | |
| Mounting | Bolted | |
| Melting I2t | 63.5 A²s | |
| Max. Rated Breaking Capacity DC | 100 kA | |
| Design Details | gRD | |
| 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 | 90 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen R220953 used for?
The R220953 is a high-speed semiconductor fuse designed to protect power electronic devices such as IGBTs, thyristors and diodes in DC power systems.
What is the current rating of this fuse?
The fuse has a 450 A rated current.
What voltage is the Mersen R220953 designed for?
It is rated for 750 V DC (IEC) applications.
Does the fuse include a striker?
Yes, the R220953 features an integrated striker to provide fuse operation indication.
Where is this fuse commonly installed?
It is commonly used in railway systems, industrial drives, renewable energy equipment, UPS systems and other high-power semiconductor applications.
Trusted for Critical Power Protection
Mersen Protistor® semiconductor fuses are relied upon by engineers worldwide to provide fast, dependable protection for power electronics in industrial, railway and energy applications.
