PC70UD13C250TF high-speed fuse engineered for reliable protection of power semiconductors in demanding industrial applications. Certified to IEC 60269-4 and UL standards, safely interrupts high fault currents up to 250A at 1250VAC (IEC) and 1300VAC (UL).
£125.91
The Mersen T300489 is a high-performance Protistor® square body semiconductor fuse engineered to provide ultra-fast protection for sensitive power electronic equipment. Designed for use in demanding industrial applications, this high-speed fuse safeguards semiconductor devices including IGBTs, thyristors, diodes and power converters against damaging short circuits and fault currents.
As part of the trusted Mersen Protistor® Size 70 series, the T300489 delivers exceptional current limiting performance, helping minimise energy let-through and reducing the risk of costly equipment damage. Manufactured using silver fuse elements embedded in high-grade silica sand, it provides reliable and repeatable protection in critical electrical installations.
With a 250 A current rating and a 1250 V AC IEC / 1300 V AC UL voltage rating, the T300489 is ideal for protecting modern power conversion equipment, variable speed drives, UPS systems, renewable energy equipment and industrial automation installations. Its square body design with flush metric threaded terminals and striker indicator allows secure installation and straightforward fuse monitoring.
High-speed semiconductor fuses are specifically designed to interrupt fault currents before they can damage expensive power electronic components. Their ultra-fast response significantly reduces thermal and mechanical stress, helping maximise equipment reliability while reducing maintenance costs.
The Mersen Protistor® range is widely trusted throughout industrial automation, renewable energy, transport and heavy industry, delivering dependable protection for today's advanced power conversion systems.
| Item number | T300489 |
|---|---|
| Catalogue No | PC70UD13C250TF |
| Description | Square Body High-Speed Fuse Protistor® Size 70 aR 1250VAC IEC 1300VAC UL 250A With Striker Flush ends metric threads |
| EAN/UPC Code | 3605340329186 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 250 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 70 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 77000 A²s |
| Melting I2t | 9580 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 | 58 W |
| HS Code | 85351000 |
The T300489 is an ultra-fast semiconductor fuse designed to protect IGBTs, thyristors, diodes and other sensitive power electronic components from short circuits.
The Mersen T300489 has a 250 A rated current.
It is rated for 1250 V AC according to IEC standards and 1300 V AC according to UL standards.
Yes. The fuse incorporates an integrated striker indicator to assist with fuse status monitoring and maintenance.
It is commonly installed in variable speed drives, power converters, renewable energy systems, UPS equipment and industrial automation applications requiring semiconductor protection.
Mersen Protistor® semiconductor fuses are trusted by engineers and OEM manufacturers worldwide for delivering exceptional protection of high-value power electronic equipment in demanding industrial environments.
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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...