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MERSEN FUSE A 070 URD 30 TTI 0250 A070URD30TTI0250
High-speed semiconductor protection fuse with aR characteristic, rated 250A, 690VAC IEC and 700VAC UL, featuring integrated striker indication and flush end UNC threads for bolted mounting.
£62.47
Why Choose the Mersen Q300578 Semiconductor Protection Fuse?
The Mersen Q300578 is an industrial high-speed semiconductor protection fuse designed to protect sensitive power electronic equipment against damaging short-circuit currents. Developed by Mersen for demanding electrical and automation applications, it is intended for use with semiconductor devices such as diodes, thyristors, rectifiers and insulated-gate bipolar transistors.
High-speed fuses operate more rapidly than conventional industrial fuses, helping to restrict peak fault current and reduce the thermal energy passed into connected equipment. This makes the Mersen Q300578 suitable for installations where reliable protection, reduced downtime and the safeguarding of valuable power electronics are essential.
Its robust industrial construction supports dependable operation in applications including variable speed drives, power converters, rectifier systems, uninterruptible power supplies and renewable energy equipment. Exact electrical ratings, connection details and dimensional data should be confirmed against the Mersen technical documentation supplied for the Q300578 before installation or replacement.
Key Advantages
- High-speed semiconductor protection fuse for industrial power electronics.
- Helps protect diodes, thyristors, rectifiers and IGBT-based equipment.
- Rapid fault interruption helps reduce damaging let-through energy.
- Suitable for demanding industrial automation and power conversion systems.
- Robust construction supports reliable long-term operation.
- Manufactured by Mersen, a specialist in electrical protection solutions.
Key Features
- Mersen semiconductor protection fuse.
- Manufacturer reference: Q300578.
- High-speed operating performance for power electronic circuits.
- Designed to limit fault-current stress on sensitive semiconductor components.
- Suitable for industrial drives, converters and rectifier equipment.
- Engineered for integration into electrical panels and power assemblies.
- Industrial-grade construction for demanding operating environments.
- Replacement selection should be based on the complete Mersen part reference.
Reliable Protection for Industrial Power Electronics
Semiconductor devices can be damaged by fault currents in a fraction of a second. High-speed fuses are engineered to interrupt these currents rapidly, helping to reduce peak current, thermal stress and the total energy transferred into sensitive electronic components.
The Mersen Q300578 is intended for power electronic installations where standard general-purpose fuses may not operate quickly enough to protect connected semiconductor devices. Correct fuse coordination is essential, and the replacement fuse must match the equipment manufacturer's specified current, voltage, breaking capacity and operating characteristic.
Typical Applications
- Variable speed drives and industrial motor control systems.
- Power converters and inverter assemblies.
- Rectifiers and controlled power supplies.
- Uninterruptible power supply systems.
- Renewable energy and battery power equipment.
- Industrial automation and semiconductor protection circuits.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | Q300578 | |
| Catalogue No | A070UD30TTI250 | |
| Description | Square Body High-Speed Fuse Protistor® Size 30 aR 690VAC IEC 700VAC UL 250A With Striker Flush ends UNC threads | |
| EAN/UPC Code | 3605340330588 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 250 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 30 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 32.4 kA²s | |
| Melting I2t | 5.8 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 | 48 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen Q300578 used for?
The Mersen Q300578 is used to protect sensitive semiconductor devices and industrial power electronic equipment against damaging short-circuit currents.
Which components can this fuse protect?
It is intended for the protection of semiconductor components such as diodes, thyristors, rectifiers and IGBTs.
Is the Q300578 a standard general-purpose fuse?
No. It is a high-speed semiconductor protection fuse designed to operate more rapidly than a conventional general-purpose industrial fuse.
How should I select a replacement for the Mersen Q300578?
The replacement should match the complete Q300578 reference together with the original current rating, voltage rating, breaking capacity, operating characteristic and connection type.
Where is this fuse typically installed?
It is typically installed in industrial drives, rectifiers, power converters, UPS equipment and other electrical assemblies containing sensitive power semiconductors.
Trusted Protection for Critical Electrical Equipment
Mersen high-speed semiconductor fuses are used throughout industrial power electronic systems to provide rapid fault interruption and dependable protection for valuable semiconductor components.
