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MERSEN FUSE 12,5 URD 73 TT F 0315 12,5URD73TTF0315
High-speed aR characteristic fuse designed for semiconductor protection in industrial power electronics applications, rated at 315A, 1250VAC IEC, 1300VAC UL, with integrated striker and bolted mounting.
£112.70
Why Choose the Mersen J300503 Protistor® High-Speed Semiconductor Fuse?
The Mersen J300503 is a high-speed semiconductor protection fuse designed to protect sensitive power electronic components against damaging short-circuit currents. As part of Mersen’s established Protistor® fuse range, it provides rapid fault interruption and effective current limitation for demanding industrial power conversion applications.
This specialist fuse helps protect components such as IGBTs, thyristors, rectifiers and power diodes by limiting the thermal and electrical energy released during a fault. Its fast operating characteristics can reduce equipment damage, improve system reliability and minimise costly production downtime.
The Mersen J300503 is suited to industrial drives, converters, inverters, uninterruptible power supplies and other equipment containing high-value semiconductor devices. Its robust construction supports dependable performance in control panels, power distribution assemblies and OEM electrical systems.
Key Advantages
- High-speed fuse protection for power semiconductor devices.
- Rapid fault clearing helps minimise damage to sensitive components.
- Current-limiting performance reduces let-through energy.
- Suitable for demanding industrial power conversion equipment.
- Robust construction supports reliable long-term operation.
- Manufactured by established electrical protection specialist Mersen.
Key Features
- Mersen Protistor® semiconductor fuse technology.
- High-speed operating characteristics for short-circuit protection.
- Designed for the protection of IGBTs, thyristors and power diodes.
- Low let-through energy helps protect valuable electrical equipment.
- Suitable for AC power conversion and motor control systems.
- Industrial-grade construction for demanding environments.
- Compatible with appropriate Mersen fuse holders and mounting systems.
- Suitable for OEM, replacement and maintenance applications.
Reliable Protection for Industrial Power Electronics
High-speed semiconductor fuses operate more rapidly than conventional general-purpose fuses. They are engineered to interrupt severe fault currents before excessive electrical or thermal energy reaches vulnerable semiconductor components.
The Mersen Protistor® range is widely specified for power electronic equipment where dependable short-circuit protection is essential. Correct fuse selection helps extend equipment service life, reduce maintenance requirements and improve the operational availability of industrial machinery.
Typical Applications
- Variable speed and variable frequency drives.
- Industrial motor control systems.
- Power converters and rectifier assemblies.
- Industrial inverters.
- Uninterruptible power supply systems.
- Battery energy storage equipment.
- Renewable energy power conversion systems.
- Industrial power supplies and automation equipment.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1250 V | |
| Item number | J300503 | |
| Catalogue No | PC73UD13C315TF | |
| Description | Square Body High-Speed Fuse Protistor® Size 73 aR 1250VAC IEC 1300VAC UL 315A With Striker Flush ends metric threads | |
| EAN/UPC Code | 3605340329421 | |
| Rated voltage AC UL | 1300 V | |
| Rated voltage AC IEC | 1250 V | |
| Ampere Rating | 315 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 73 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 95 kA²s | |
| Melting I2t | 12 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 126 kA | |
| 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 | 125 mm | |
| Sell Pack Height | 75 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 1.22 kg | |
| Power Dissipation at Rated Current Value | 84 W | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen J300503 used for?
The Mersen J300503 is used to provide high-speed short-circuit protection for semiconductor devices installed in industrial power electronic equipment.
Which components can the J300503 help protect?
It is designed for applications containing sensitive components such as IGBTs, thyristors, rectifiers and power diodes.
Why is a high-speed fuse required for semiconductor equipment?
A high-speed fuse interrupts fault currents rapidly and limits the energy reaching sensitive semiconductor components, helping reduce the risk of extensive equipment damage.
Where is the Mersen J300503 commonly installed?
It may be installed in drives, converters, inverters, UPS systems, industrial power supplies and other power conversion equipment.
Can the J300503 replace a general-purpose industrial fuse?
Semiconductor fuses have specialist operating characteristics and should only be used where their electrical ratings, dimensions and mounting arrangement match the equipment manufacturer’s requirements.
Trusted by Industrial Engineers Worldwide
Mersen Protistor® high-speed fuses are trusted in industrial power electronic systems where rapid fault interruption, effective current limitation and dependable semiconductor protection are essential.
