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MERSEN FUSE A 070 URD 31 TTI 0315 A070URD31TTI0315
High-speed aR characteristic fuse designed for semiconductor protection in industrial applications up to 690VAC IEC and 700VAC UL at 315A with striker indication and flush ends UNC threads.
£73.50
Why Choose the Mersen C300474 A070UD31TTI315 High-Speed Fuse?
The Mersen C300474 A070UD31TTI315 is a Protistor® Size 31 aR square body high-speed semiconductor fuse designed to provide ultra-fast protection for modern power electronic equipment. It is engineered to protect sensitive semiconductor devices including IGBTs, thyristors, diodes and rectifiers against damaging short-circuit currents while maintaining excellent current-limiting performance.
Constructed using precision die-cut fuse elements embedded in solidified silica sand, the fuse delivers low let-through energy, high interrupting capacity and dependable long-term performance. Silver-plated contact surfaces and non-magnetic hardware enhance reliability, while the integrated striker indicator enables convenient fuse status monitoring.
With a 315 A current rating, 690 V AC (IEC) and 700 V AC (UL) voltage ratings, the C300474 is suitable for industrial drives, UPS systems, converters, renewable energy equipment and other demanding semiconductor protection applications.
Key Advantages
- Ultra-fast aR semiconductor protection.
- 315 A current rating.
- 690 V AC IEC / 700 V AC UL voltage ratings.
- 200 kA interrupting capacity.
- Integrated striker indicator.
- Flush ends with UNC threaded terminals for secure bolted installation.
Key Features
- Mersen Protistor® Size 31 aR series.
- Catalogue number: A070UD31TTI315.
- Square body ceramic construction.
- Current-limiting design.
- Silver-plated contacts.
- Low I²t characteristics.
- RoHS compliant.
- Designed for semiconductor protection.
Engineered for Semiconductor Protection
Protistor® semiconductor fuses are specifically developed to interrupt fault currents before sensitive power semiconductor devices are damaged. Their ultra-fast operation reduces let-through energy, improves equipment reliability and helps minimise costly downtime in demanding industrial applications.
Typical Applications
- Variable frequency drives.
- Industrial inverters.
- UPS systems.
- Motor drives.
- Renewable energy converters.
- Industrial automation equipment.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | C300474 | |
| Catalogue No | A070UD31TTI315 | |
| Description | Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 315A With Striker Flush ends UNC threads | |
| EAN/UPC Code | 3605340329032 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 315 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 31 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 44000 A²s | |
| Melting I2t | 7500 A²s | |
| 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 | 51 mm | |
| Product Length | 50.6 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.155 kg | |
| Sell Pack Width | 85 mm | |
| Sell Pack Length | 168 mm | |
| Sell Pack Height | 65 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.385 kg | |
| Power Dissipation at Rated Current Value | 65 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen C300474 used for?
It provides ultra-fast protection for semiconductor devices including IGBTs, thyristors and power diodes in industrial power conversion equipment.
What is the current rating?
The Mersen C300474 is rated at 315 A.
What voltage is this fuse designed for?
It is rated at 690 V AC (IEC) and 700 V AC (UL).
Does it include a striker indicator?
Yes. The fuse incorporates an integrated striker indicator for local or remote status indication.
Which applications is it suitable for?
Typical applications include industrial drives, UPS systems, converters, renewable energy equipment and other semiconductor-based power electronics.
Trusted Semiconductor Protection Worldwide
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs and industrial engineers to protect critical power electronic systems.
