Why Choose the Mersen R218676 5 x 20 mm Medium Time-Lag Miniature Fuse?
The Mersen R218676 is a dependable 5 x 20 mm medium time-lag miniature fuse designed to protect electrical equipment against sustained overloads and short-circuit currents. Part of the established Mersen 5SM IEC miniature fuse series, it combines a compact cylindrical format with a controlled time-delay characteristic for reliable industrial circuit protection.
Its medium time-lag operation allows the fuse to tolerate brief inrush currents produced by transformers, power supplies, motors and capacitive loads during normal start-up. This helps reduce unnecessary fuse operation while ensuring that prolonged excessive current is safely interrupted.
With a rated current of 6.3 A, a rated voltage of 250 V AC and a breaking capacity of 300 A AC, the Mersen R218676 is suitable for electrical distribution circuits, industrial control equipment, instrumentation and OEM machinery. Its standard 5 x 20 mm construction enables straightforward installation in a compatible fuse holder or clip.
Key Advantages
- Medium time-lag characteristic withstands temporary inrush currents.
- 6.3 A current rating for dependable equipment protection.
- 250 V AC rated voltage for industrial electrical circuits.
- 300 A AC breaking capacity for effective fault interruption.
- Compact 5 x 20 mm cylindrical fuse format.
- Helps minimise nuisance fuse operation during equipment start-up.
Key Features
- Mersen 5SM IEC miniature fuse series.
- 6.3 A rated current.
- 250 V AC rated voltage.
- Medium time-lag operating characteristic.
- 73.1 A²s melting I²t.
- 300 A AC breaking capacity.
- Glass body with internal extinguishing agent.
- RoHS-compliant construction.
Reliable Protection for Circuits with Start-Up Current
Medium time-lag miniature fuses are designed to tolerate brief current surges that occur during the normal start-up of transformers, motors, power supplies and other inductive or capacitive equipment. These temporary peaks do not necessarily indicate a fault and could cause nuisance operation if a quick-acting fuse were used.
The Mersen R218676 provides a controlled delay during acceptable short-duration surges while disconnecting the circuit when excessive current persists. This balance helps protect wiring and connected components while supporting reliable equipment operation and reducing unnecessary maintenance.
Typical Applications
- Industrial control panels.
- Electrical distribution circuits.
- Electronic power supplies.
- Automation equipment.
- Control transformers.
- Instrumentation systems.
- OEM machinery.
- Industrial electrical equipment.
