Why Choose the Mersen R079894 High-Speed Cylindrical Fuse?
The Mersen R079894 is a high-performance Protistor® cylindrical semiconductor fuse-link developed specifically for the protection of sensitive equipment in high-voltage DC circuits. Rated at 1 A and 1500 V DC, it provides extremely fast, full-range protection for auxiliary circuits, control systems, measuring equipment and monitoring devices.
Part of the Mersen 20 × 127 mm gR range, the R079894 features a gRB design classification and excellent current-limiting characteristics. Its rapid response helps reduce the thermal and electrical energy passed through to semiconductor components during overload and short-circuit conditions.
With a maximum breaking capacity of 30 kA DC, a durable ceramic body and cylindrical ferrule terminals, the Mersen R079894 is suitable for demanding industrial automation, renewable energy, power conversion and high-voltage DC applications.
Key Advantages
- Fast-acting gR full-range semiconductor protection.
- 1 A rated current for sensitive control and auxiliary circuits.
- 1500 V DC voltage rating for high-voltage DC installations.
- 30 kA DC breaking capacity for reliable fault interruption.
- Low let-through energy helps protect sensitive semiconductor devices.
- Excellent current-limiting and cycling performance.
- Compact 20 × 127 mm cylindrical construction.
- Suitable for industrial, renewable energy and power electronics systems.
Key Features
- Mersen Protistor® high-speed cylindrical fuse-link.
- 1 A rated current.
- 1500 V DC rated operating voltage.
- gR operating characteristic.
- gRB design classification.
- 30 kA maximum DC breaking capacity.
- 20 × 127 mm cylindrical fuse format.
- Fast-acting, full-range overcurrent protection.
- Designed for clip mounting in a compatible fuse holder.
- No integrated blown-fuse indicator.
- RoHS-compliant construction.
Reliable Protection for Sensitive DC Circuits
High-speed gR fuse-links are designed to interrupt overload and short-circuit currents before damaging levels of thermal energy can reach semiconductor devices and other sensitive components. Their extremely fast operation helps improve equipment reliability while reducing the risk of expensive repairs and prolonged system downtime.
The Mersen R079894 is specially developed for DC applications and is particularly suitable for low-current auxiliary, control, measuring and monitoring circuits. Its standard cylindrical dimensions allow straightforward installation in a compatible 20 × 127 mm fuse holder.
Typical Applications
- Industrial auxiliary circuits.
- Control and monitoring equipment.
- Measuring devices and instrumentation.
- Semiconductor protection circuits.
- Industrial power converters.
- Photovoltaic power systems.
- Battery energy storage equipment.
- High-voltage DC distribution systems.
