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MERSEN FUSE 6,9 GRB 73 TTF 0400 PC73GB69V400TF
High-speed fuse with striker indication, rated 400A at 690VAC, designed for semiconductor protection with flush ends and metric threads.
£163.68
Why Choose the Mersen X301343 Protistor® High-Speed Fuse?
The Mersen X301343 is a Protistor® Size 73 gR square body high-speed semiconductor fuse engineered to provide full-range protection for sensitive power semiconductor devices. Rated at 400 A and 690 V AC (IEC), it is designed to protect rectifiers, inverters, converters, motor drives and other industrial power electronic equipment against overloads and short-circuit faults.
Constructed using pure silver die-cut fuse elements embedded in solidified sand, the X301343 delivers exceptionally low I²t values, excellent arc suppression and high interrupting performance. Silver-plated contact surfaces, non-magnetic hardware and an integrated striker indicator provide reliable operation while simplifying maintenance and remote status indication.
The fuse features flush-end metric threaded terminals for secure bolted installation and forms part of Mersen's internationally recognised Protistor® semiconductor protection range, trusted across industrial automation, renewable energy, UPS systems and power conversion applications.
Key Advantages
- Full-range gR semiconductor protection.
- 400 A current rating.
- 690 V AC IEC voltage rating.
- 150 kA breaking capacity.
- Integrated striker indicator for fault indication.
- Silver-plated flush-end metric threaded terminals for dependable electrical connections.
Key Features
- Mersen Protistor® Size 73 series.
- Catalogue number PC73GB69V400TF.
- 400 A rated current.
- 690 V AC IEC rated voltage.
- gR full-range semiconductor protection.
- Square body bolted construction.
- Flush-end metric threaded terminals.
- Integrated striker indication system.
- Ceramic insulated body with silver-plated brass terminals.
Reliable Semiconductor Protection
Protistor® gR semiconductor fuses provide both overload and short-circuit protection for power semiconductor devices. Their ultra-fast operation minimises thermal stress on expensive components while helping maximise equipment reliability and reduce downtime.
The Mersen Protistor® range is widely specified for industrial drives, renewable energy systems, UPS equipment, converters, rectifiers and other high-power electronic installations where dependable semiconductor protection is essential.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters.
- Rectifier systems.
- UPS installations.
- Renewable energy inverters.
- Industrial automation equipment.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | gR | |
| Voltage | 690 V | |
| Item number | X301343 | |
| Catalogue No | PC73GB69V400TF | |
| Description | Square Body High-Speed Fuse Protistor® Size 73 gR 690VAC IEC 400A With Striker Flush ends metric threads | |
| EAN/UPC Code | 3605340340037 | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 400 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | gR | |
| Fuse Size | 73 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 160 kA²s | |
| Melting I2t | 26.5 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 150 kA | |
| Design Details | Standard Terminal | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Brass | |
| Connection/Terminal Type | Flush ends | |
| Product Width | 73 mm | |
| Product Length | 74 mm | |
| Product Height | 78.5 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 1.22 kg | |
| Sell Pack Width | 110 mm | |
| Sell Pack Length | 130 mm | |
| Sell Pack Height | 80 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 1.22 kg | |
| Power Dissipation at Rated Current Value | 71 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen X301343 used for?
The X301343 is designed to provide full-range protection for semiconductor devices including diodes, thyristors and IGBTs used in industrial power conversion equipment.
What is the current rating of the X301343?
The fuse has a rated current of 400 A.
What voltage is the Mersen X301343 rated for?
The X301343 is rated for 690 V AC (IEC).
Does the fuse include a blown fuse indicator?
Yes. The fuse incorporates an integrated striker indicator for local or remote fault indication using a compatible microswitch.
Where is the X301343 typically installed?
It is commonly installed in industrial drives, converters, UPS systems, renewable energy equipment and other power electronic applications requiring semiconductor protection.
Trusted Protection for Industrial Power Electronics
Mersen Protistor® semiconductor fuses are trusted worldwide for their rapid fault interruption, low energy let-through and dependable protection of critical industrial power electronic systems.
