High-speed semiconductor protection fuse rated at 250A with 1250VAC IEC and 1300VAC UL ratings, featuring a ceramic body, plain blades, and integrated striker for remote indication.
£171.80
The Mersen B301163 is a Protistor® Size 71 square body high-speed semiconductor fuse engineered to provide superior protection for modern power conversion equipment. Designed specifically for semiconductor applications, it safeguards sensitive devices including IGBTs, thyristors, diodes and rectifiers against damaging short-circuit currents. This model corresponds to Catalogue Number PC71UD13C250PA and features an ultra-fast aR operating characteristic.
Constructed using precision die-cut fuse elements embedded in solidified silica sand, the B301163 delivers low let-through energy (I²t) and high interrupting performance. Silver-plated contact surfaces and non-magnetic hardware ensure long service life and dependable electrical performance, while the integrated striker indicator allows remote fuse indication when used with a compatible microswitch.
Rated at 250 A with a 1250 V AC IEC / 1300 V AC UL voltage rating, the Mersen B301163 is ideally suited for industrial drives, converters, UPS systems, renewable energy installations and other high-power semiconductor applications requiring reliable protection.
The Mersen B301163 has been engineered to interrupt high fault currents before excessive thermal or electrical stress can damage expensive semiconductor devices. Its low-energy let-through characteristics help maximise equipment reliability, reduce maintenance costs and minimise costly production downtime.
Protistor® semiconductor fuses are widely specified by equipment manufacturers around the world thanks to their high interrupting capacity, dependable performance and compliance with international standards for semiconductor protection.
| Item number | B301163 |
|---|---|
| Catalogue No | PC71UD13C250PA |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1250VAC IEC 1300VAC UL 250A With Striker Plain Blades |
| EAN/UPC Code | 3605340337600 |
| 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 | 71 |
| Mounting | Clip |
| Clearing I2t At Rated Voltage | 72 kA²s |
| Melting I2t | 8.9 kA²s |
| AC Max I.R./Breaking Capacity | I1: 126 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Copper |
| Connection/Terminal Type | Plain Blades |
| Product Width | 51 mm |
| Product Length | 149.4 mm |
| Product Height | 56.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 1.68 kg |
| Sell Pack Width | 140 mm |
| Sell Pack Length | 170 mm |
| Sell Pack Height | 70 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.56 kg |
| Power Dissipation at Rated Current Value | 61 W |
| HS Code | 85351000 |
The Mersen B301163 protects semiconductor devices such as IGBTs, thyristors, rectifiers and power diodes against damaging short-circuit currents.
The fuse is rated at 1250 V AC (IEC) and 1300 V AC (UL).
The Mersen B301163 has a rated current of 250 A.
Yes. The fuse includes an integrated striker indicator for optional remote indication using a compatible microswitch.
It is commonly installed in industrial drives, converters, UPS systems, renewable energy equipment and other high-power semiconductor applications.
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, electrical engineers and maintenance professionals to provide dependable protection for high-value power electronic equipment.
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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...