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MERSEN FUSE 12,5 URD 273 TTF 1100 12,5URD273TTF1100
High-speed Protistor® fuse delivering reliable short-circuit protection up to 1100A at 1250VAC with striker indication and flush metric thread ends.
£337.54
Why Choose the Mersen J300733 High-Speed Semiconductor Fuse?
The Mersen J300733 is an industrial high-speed semiconductor fuse developed to protect sensitive power electronic components from damaging short-circuit currents. Its rapid operating characteristics help interrupt severe electrical faults before excessive thermal and electrical energy can reach valuable semiconductor devices.
Designed for demanding power conversion applications, the J300733 can help protect components such as IGBTs, thyristors, rectifiers and power diodes. Its current-limiting performance reduces fault let-through energy, helping minimise secondary equipment damage, lower maintenance requirements and improve system availability.
The Mersen J300733 is suitable for use in compatible industrial drives, converters, inverters, uninterruptible power supplies and specialist power control equipment. Before installation, its current rating, voltage rating, operating class, dimensions and connection arrangement should be checked against the original fuse and equipment manufacturer’s specification.
Key Advantages
- Rapid short-circuit protection for semiconductor devices.
- Current-limiting operation helps reduce damaging fault energy.
- Supports the protection of valuable power electronic components.
- Suitable for demanding industrial power conversion equipment.
- Helps reduce equipment downtime and maintenance costs.
- Manufactured by established circuit protection specialist Mersen.
Key Features
- Mersen high-speed semiconductor fuse technology.
- Designed for rapid operation under short-circuit conditions.
- Suitable for protecting IGBTs, thyristors, rectifiers and power diodes.
- Current-limiting construction helps restrict fault let-through energy.
- Industrial-grade design for demanding electrical environments.
- Suitable for OEM equipment and maintenance replacement applications.
- Designed for use with a compatible fuse holder or mounting system.
- Manufacturer reference clearly identified as J300733.
Dependable Protection for Industrial Power Electronics
High-speed semiconductor fuses are designed to respond more rapidly than conventional general-purpose fuses. During a short-circuit fault, they limit the electrical and thermal energy transferred to vulnerable semiconductor components, helping prevent extensive damage to power modules and associated equipment.
Correct fuse selection is essential for safe and reliable protection. The current rating, voltage rating, operating class, breaking capacity, dimensions and terminal arrangement of the Mersen J300733 must correspond with the requirements of the protected circuit and the original equipment manufacturer.
Typical Applications
- Variable speed and variable frequency drives.
- Industrial motor control systems.
- Power converters and rectifier assemblies.
- Industrial inverter systems.
- Uninterruptible power supplies.
- 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 Size | 2x73 mm | |
| Fuse Class | aR | |
| Voltage | 1250 V | |
| Item number | J300733 | |
| Catalogue No | PC273UD13C11CTF | |
| Description | Square Body High-Speed Fuse Protistor® 2x73 aR 1250VAC IEC 1100A With Striker Flush ends metric threads | |
| EAN/UPC Code | 3605340332780 | |
| Rated voltage AC IEC | 1250 V | |
| Ampere Rating | 1100 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 2x73 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 1860 kA²s | |
| Melting I2t | 228 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 100 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Brass | |
| Connection/Terminal Type | Flush ends | |
| Product Width | 167 mm | |
| Product Length | 91 mm | |
| Product Height | 78.5 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 2.53 kg | |
| Sell Pack Width | 90 mm | |
| Sell Pack Length | 205 mm | |
| Sell Pack Height | 95 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 2.53 kg | |
| Power Dissipation at Rated Current Value | 244 W | |
| HS Code | 85351000 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen J300733 used for?
The Mersen J300733 is intended to provide high-speed short-circuit protection for semiconductor devices installed in compatible industrial power electronic equipment.
Which components can the J300733 help protect?
It may be used in suitable circuits 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 severe fault currents rapidly and limits the energy reaching sensitive semiconductor components, helping reduce the risk of extensive equipment damage.
Where can the Mersen J300733 be installed?
It may be used in compatible industrial drives, converters, inverters, UPS systems, power supplies and other power conversion equipment.
Can the J300733 replace another semiconductor fuse?
It should only be used as a replacement when its current rating, voltage rating, utilisation category, breaking capacity, physical dimensions and mounting arrangement match the original equipment requirements.
Trusted by Industrial Engineers Worldwide
Mersen high-speed semiconductor fuses are used in industrial power electronic systems where rapid fault interruption, effective current limitation and dependable component protection are essential.
