Why Choose the MERSEN FUSE 2 URD 33 TTF 2000 PC33UD20V2000TF?
£330.47
The Mersen B301209 is a premium Protistor® square body high-speed semiconductor fuse engineered to provide rapid short-circuit protection for sensitive power electronic equipment. Designed specifically for semiconductor applications, it protects IGBTs, thyristors, power diodes, rectifiers and other solid-state devices from damaging fault currents, helping maximise system reliability and minimise costly downtime. Mersen Protistor® fuses are renowned for their ultra-fast response, low let-through energy and high interrupting capacity.
Manufactured using precision silver fuse elements embedded in solidified silica sand, the B301209 delivers dependable fault interruption while limiting thermal and electrical stress on valuable semiconductor components. Silver-plated contacts and non-magnetic hardware ensure excellent conductivity, corrosion resistance and long service life in demanding industrial environments.
The Mersen B301209 is suitable for industrial motor drives, power converters, UPS systems, renewable energy installations, battery energy storage systems and other high-performance power conversion equipment where reliable semiconductor protection is essential.
Semiconductor devices can fail within milliseconds when exposed to excessive fault current. The Mersen B301209 has been developed to interrupt these faults rapidly, reducing thermal stress and limiting energy let-through before damage can occur. This helps extend equipment life while reducing maintenance costs and production downtime.
Protistor® semiconductor fuses are widely specified by OEMs, panel builders and maintenance engineers for industrial power conversion equipment thanks to their proven reliability, consistent performance and compliance with international semiconductor protection standards.
| Manufacturer | Mersen |
|---|---|
| Series | Protistor® |
| Model | B301209 |
| Product type | Square body high-speed semiconductor fuse |
| Protection class | aR semiconductor protection |
| Application | Semiconductor short-circuit protection |
| Protected devices | IGBTs, thyristors, power diodes and rectifiers |
| Construction | Square body fuse |
| Interrupting capability | High breaking capacity |
| Contact material | Silver-plated terminals |
| Installation | Equipment-specific fuse mounting |
| Brand | Mersen |
The Mersen B301209 is designed to protect semiconductor devices such as IGBTs, thyristors, rectifiers and power diodes against damaging short-circuit currents.
It is a Protistor® square body high-speed semiconductor fuse with an ultra-fast aR operating characteristic.
It is suitable for industrial drives, converters, UPS systems, renewable energy equipment, battery storage systems and other semiconductor-based power conversion applications.
High-speed semiconductor fuses interrupt fault currents much faster than conventional industrial fuses, helping minimise damage to sensitive power electronic components.
The B301209 is manufactured by Mersen, one of the world's leading manufacturers of electrical protection solutions.
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, electrical engineers and maintenance professionals to provide dependable protection for high-value power electronic equipment operating in demanding industrial 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...