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MERSEN FUSE A 070 URD 30 TTI 0125 A070URD30TTI0125
High-speed Protistor® fuse with rapid fault clearance up to 125A at 690VAC (IEC) and 700VAC (UL). Features flush mount striker ends and UNC threads for reliable installation and indication.
£51.18
Why Choose the Mersen G300708 Protistor® High-Speed Fuse?
The Mersen G300708 (A070UD30TTI125) is a premium square body high-speed semiconductor fuse designed to provide exceptional protection for modern power electronic equipment. Part of the trusted Mersen Protistor® Size 30 aR series, it is engineered to safeguard sensitive semiconductor devices including IGBTs, MOSFETs, thyristors and diodes against damaging short-circuit currents.
Its ultra-fast aR operating characteristic rapidly interrupts fault currents, limiting thermal and electrical stress on valuable semiconductor components. Manufactured using die-cut fuse elements embedded in solidified sand with silver-plated contact surfaces, the fuse delivers low let-through energy, high breaking capacity and dependable long-term performance in demanding industrial environments.
With a 125 A current rating, 690 V AC IEC / 700 V AC UL voltage rating and an integrated striker indicator, the G300708 is ideally suited for variable frequency drives, UPS systems, industrial inverters, converters and renewable energy applications requiring reliable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 125 A current rating for industrial power electronic equipment.
- 690 V AC IEC and 700 V AC UL voltage ratings.
- Protects IGBTs, MOSFETs, thyristors and diodes.
- Integrated striker indicator for fuse status indication.
- High breaking capacity with low let-through energy for maximum semiconductor protection.
Key Features
- Mersen Protistor® Size 30 aR series.
- Catalogue number: A070UD30TTI125.
- 125 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- Square body fuse with flush ends and UNC threaded terminals.
- Integrated striker indication system.
- Silver-plated brass terminals for excellent electrical conductivity.
- Designed specifically for semiconductor short-circuit protection.
Reliable Protection for Industrial Power Electronics
High-speed semiconductor fuses are designed to interrupt fault currents before excessive energy reaches sensitive electronic components. Their rapid operation significantly reduces thermal stress, helping extend the service life of semiconductor devices while reducing maintenance costs and equipment downtime.
The Protistor® range is widely used throughout industrial automation, renewable energy and power conversion industries where reliable protection of expensive semiconductor assemblies is essential for maintaining operational continuity.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and inverters.
- UPS and backup power systems.
- Renewable energy equipment.
- Protection of IGBT, MOSFET, SCR and diode modules.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | G300708 | |
| Catalogue No | A070UD30TTI125 | |
| Description | Square Body High-Speed Fuse Protistor® Size 30 aR 690VAC IEC 700VAC UL 125A With Striker Flush ends UNC threads | |
| EAN/UPC Code | 3605340332506 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 125 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 30 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 4.9 kA²s | |
| Melting I2t | 0.85 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Brass | |
| Connection/Terminal Type | Flush ends | |
| Product Width | 40 mm | |
| Product Length | 50.6 mm | |
| Product Height | 48 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 0.765 kg | |
| Sell Pack Width | 80 mm | |
| Sell Pack Length | 135 mm | |
| Sell Pack Height | 55 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.255 kg | |
| Power Dissipation at Rated Current Value | 30 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen G300708 used for?
The G300708 is a high-speed semiconductor fuse designed to protect sensitive power electronic devices such as IGBTs, MOSFETs, thyristors and rectifiers against damaging short-circuit currents.
What is the current rating of this fuse?
This fuse has a 125 A rated current.
What voltage is the fuse rated for?
The fuse is rated for 690 V AC (IEC) and 700 V AC (UL).
What does the integrated striker indicator do?
The integrated striker provides a mechanical indication when the fuse has operated and can be used with compatible microswitch accessories for remote monitoring.
Where is this fuse commonly installed?
It is commonly installed in industrial drives, UPS systems, power converters, renewable energy installations and other semiconductor protection applications.
Trusted for Semiconductor Protection Worldwide
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs and industrial engineers for delivering rapid fault interruption, dependable protection and long service life in demanding power electronic applications.
