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MERSEN FUSE CC 4,5 GRB 72 EF 0550 D72GB45V550EF
High-speed fuse offering fast, reliable protection for demanding DC circuits, rated at 450V DC (IEC) and 500V DC (UL) with a robust 550A breaking capacity. Features striker indication and bolted mounting.
£319.36
Why Choose the Mersen Q302694 Protistor® High-Speed Fuse?
The Mersen Q302694 (D72GB45V550EF) is a premium Protistor® square body high-speed semiconductor fuse engineered to provide rapid fault protection for sensitive power electronic equipment. Designed for demanding DC applications, it protects semiconductors including IGBTs, thyristors, GTOs and power diodes against damaging short-circuit currents, helping maximise system reliability and minimise costly downtime.
Part of the proven Protistor® Size 72 gR series, the Q302694 features low let-through energy (I²t), high interrupting capability and silver fuse elements embedded in solidified sand for exceptional arc control. The fuse incorporates open slot blade terminals with an integrated striker, allowing easy installation and remote indication when operated.
With a 550 A current rating, 450 V DC (IEC) and 500 V DC (UL) voltage ratings, the Q302694 is ideally suited to industrial drives, battery energy storage systems, renewable energy converters, UPS equipment and other high-power semiconductor applications.
Key Advantages
- High-speed gR semiconductor protection fuse.
- 550 A current rating.
- 450 V DC IEC / 500 V DC UL rated voltage.
- Protects IGBTs, thyristors, GTOs and power diodes.
- Low I²t minimises damage during fault conditions.
- Integrated striker for remote fuse indication.
- Open slot blade terminals simplify installation.
Key Features
- Mersen Protistor® Size 72 gR series.
- Manufacturer part number: Q302694.
- Catalogue number: D72GB45V550EF.
- 550 A rated current.
- 450 V DC IEC / 500 V DC UL.
- Square body high-speed semiconductor fuse.
- Open slot blade connections.
- Integrated striker indicator.
Reliable Protection for Modern Power Electronics
High-speed semiconductor fuses are specifically designed to protect expensive electronic power devices against destructive fault currents. Their extremely fast operation limits thermal and electrical stress, helping improve equipment reliability, reduce repair costs and extend the service life of critical power conversion equipment.
Mersen Protistor® semiconductor fuses are widely specified for industrial automation, renewable energy systems, battery storage installations, UPS equipment and power converters where dependable semiconductor protection is essential.
Typical Applications
- Industrial DC drives.
- Power converters and rectifiers.
- Battery energy storage systems.
- Renewable energy installations.
- UPS and critical power systems.
- Industrial automation equipment.
- Protection of IGBTs, GTOs and thyristors.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | gR | |
| Voltage | 500 V | |
| Item number | Q302694 | |
| Catalogue No | D72GB45V550EF | |
| Description | Square Body High-Speed Fuse Protistor® Size 72 gR 450VDC IEC 500VDC UL 550A With Striker Open Slot Blades | |
| EAN/UPC Code | 3605340355321 | |
| Rated voltage DC UL | 500 V | |
| Rated voltage DC IEC | 450 V | |
| Ampere Rating | 550 A | |
| RoHS Compliant | Yes | |
| AC or DC | DC | |
| Speed/Characteristic | gR | |
| Fuse Size | 72 | |
| Mounting | Bolted | |
| Melting I2t | 84050 A²s | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | Open Slot Blades | |
| Product Width | 59 mm | |
| Product Length | 133.4 mm | |
| Product Height | 63 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 2.274 kg | |
| Sell Pack Width | 157 mm | |
| Sell Pack Length | 202 mm | |
| Sell Pack Height | 80 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.758 kg | |
| Power Dissipation at Rated Current Value | 72 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen Q302694 used for?
The Mersen Q302694 is a high-speed semiconductor fuse designed to protect sensitive power electronic devices such as IGBTs, thyristors, GTOs and power diodes from damaging short-circuit currents.
What is the current rating of this fuse?
The fuse has a 550 A rated current.
What voltage is the Q302694 rated for?
The fuse is rated for 450 V DC (IEC) and 500 V DC (UL).
Does this fuse include a striker?
Yes. The Q302694 incorporates an integrated striker that can be used for remote fuse indication or operation of an auxiliary microswitch.
Where is the Q302694 commonly installed?
It is commonly installed in industrial drives, renewable energy equipment, battery storage systems, UPS installations and other semiconductor-based power conversion equipment.
Trusted for Semiconductor Protection
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, panel builders and industrial engineers for delivering rapid fault protection, low energy let-through and dependable long-term performance.
