Why Choose the MERSEN FUSE 6,9 URT 217/125 BS217UT69V125?
£114.02
The Mersen H235987 is a premium high speed semiconductor fuse designed to provide rapid protection for sensitive power electronic equipment operating in demanding industrial environments. Manufactured as part of the renowned Mersen Protistor® range, this fuse delivers exceptional fault current limitation to protect semiconductors including thyristors, IGBTs, diodes and rectifiers from catastrophic short circuits.
Engineered for high reliability and consistent performance, the H235987 helps minimise equipment damage, reduce costly downtime and extend the service life of valuable industrial assets. Its compact blade-type construction enables quick installation into compatible fuse bases and switchgear assemblies used throughout automation and power conversion systems.
Featuring a 125 A current rating and a 690 V AC voltage rating, the H235987 is an excellent choice for protecting variable frequency drives, UPS systems, industrial converters, motor control equipment and renewable energy installations requiring fast acting semiconductor protection.
High speed semiconductor fuses are specifically developed to interrupt fault currents before permanent damage can occur to sensitive electronic components. Their rapid response protects valuable equipment while helping maintain production uptime and reducing maintenance costs.
The Mersen Protistor® family is trusted worldwide in industrial automation, renewable energy, motor control and power conversion applications where dependable semiconductor protection is essential.
| Manufacturer | Mersen |
|---|---|
| Series | Protistor® |
| Model | H235987 |
| Product type | High speed semiconductor fuse |
| Current rating | 125 A |
| Rated voltage | 690 V AC |
| Fuse class | High speed semiconductor protection |
| Body style | Blade fuse |
| Mounting type | Fuse holder mounting |
| Frequency | 50 / 60 Hz |
| High breaking capacity | Yes |
| Application | Semiconductor and power electronics protection |
The H235987 is designed to protect semiconductor devices such as IGBTs, diodes and thyristors from damaging short circuit faults.
The fuse has a 125 A current rating.
The Mersen H235987 is designed for use on systems up to 690 V AC.
It is typically installed in industrial drives, converters, UPS systems, motor control equipment and other power electronic applications.
Semiconductor fuses operate extremely quickly to minimise damage to expensive electronic components during high fault current conditions.
Mersen Protistor® semiconductor fuses are relied upon by engineers worldwide for delivering rapid fault protection, high reliability and dependable performance in demanding industrial power electronic systems.
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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...