High-speed aR fuse designed for semiconductor protection with ratings of 125A, 1250VAC IEC, and 1300VAC UL. Features striker indication and flush ends with metric threads for bolted mounting.
£108.34
The Mersen Q300486 is a genuine Protistor® Size 70 square body high-speed semiconductor fuse designed to provide outstanding protection for modern power electronic equipment. Identified by the catalogue number PC70UD13C125TF, this ultra-fast aR characteristic fuse-link is engineered specifically to protect IGBTs, thyristors, diodes and other semiconductor devices against damaging short-circuit currents.
Part of the trusted Mersen Protistor® Size 70 range, the Q300486 combines rapid fault clearing, low let-through energy and high interrupting capacity to maximise equipment reliability whilst reducing costly downtime. The fuse features flush-end metric threaded terminals, an integrated striker indicator and silver-plated contact surfaces for dependable long-term operation.
With a 125 A current rating, 1250 V AC IEC and 1300 V AC UL voltage ratings, the Mersen Q300486 is ideally suited to protecting industrial drives, renewable energy converters, UPS systems, rectifiers, inverters and other demanding power conversion equipment.
The Protistor® Size 70 range has been developed specifically to provide state-of-the-art protection for high-value semiconductor devices. Pure silver fuse elements embedded in solidified sand deliver extremely low let-through energy and excellent arc control, helping minimise damage during short-circuit faults.
These fuses are widely used wherever high-power semiconductor devices require dependable protection, including renewable energy installations, industrial drives, UPS systems, converters and power supplies.
| Item number | Q300486 |
|---|---|
| Catalogue No | PC70UD13C125TF |
| Description | Square Body High-Speed Fuse Protistor® Size 70 aR 1250VAC IEC 1300VAC UL 125A With Striker Flush ends metric threads |
| EAN/UPC Code | 3605340329155 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 125 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 70 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 10500 A²s |
| Melting I2t | 1310 A²s |
| 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 | 39.8 mm |
| Product Length | 74 mm |
| Product Height | 49.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 1.017 kg |
| Sell Pack Width | 85 mm |
| Sell Pack Length | 133 mm |
| Sell Pack Height | 55 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.339 kg |
| Power Dissipation at Rated Current Value | 38 W |
| HS Code | 85351000 |
The Mersen Q300486 is a high-speed semiconductor fuse designed to protect IGBTs, thyristors, diodes and other power semiconductor devices against short-circuit faults.
The Mersen Q300486 has a rated current of 125 A.
The fuse is rated for 1250 V AC (IEC) and 1300 V AC (UL).
The Q300486 features flush-end metric threaded terminals together with an integrated striker indicator.
It is ideal for industrial drives, renewable energy systems, UPS equipment, converters, rectifiers and other high-power semiconductor applications.
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, machine builders and industrial engineers to protect critical power electronic equipment operating in demanding environments.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...