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MERSEN FUSE 5SM 6,3A MITTELTR. MI5SM25V6,3
Mersen R218676 MI5SM25V6.3 medium time-lag 5 x 20 mm IEC miniature fuse rated at 6.3 A and 250 V AC with a 300 A breaking capacity.
£0.4125
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.
Technical Specifications
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| Current | 6.3 A | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | Miniature | |
| Fuse Size | 5x20 mm | |
| Fuse Class | Time delay | |
| Voltage | 250 V | |
| Manufacturer | Mersen | |
| Series | 5SM IEC Miniature Fuses | |
| Model | R218676 | |
| Catalogue number | MI5SM25V6.3 | |
| Product type | Medium time-lag miniature fuse | |
| Fuse size | 5 x 20 mm | |
| Rated current | 6.3 A | |
| Rated voltage | 250 V AC | |
| Operating characteristic | Medium time-lag | |
| Breaking capacity | 300 A AC | |
| Melting I²t | 73.1 A²s | |
| Power dissipation at rated current | 1.06 W | |
| Maximum voltage drop | 0.12 V | |
| Body material | Glass | |
| Extinguishing agent | Yes | |
| Product diameter | 5.1 mm | |
| Product length | 20 mm | |
| Mounting type | Clip mounting | |
| Applicable standard | IEC 60127-2 Sheet 2 | |
| Product weight | approx. 1.2 g | |
| RoHS compliant | Yes | |
| EAN | 4086500014880 | |
| HS Code | 85361010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the Mersen R218676 used for?
The Mersen R218676 provides medium time-lag overcurrent and short-circuit protection for industrial electrical equipment, distribution circuits and electronic systems.
What is the current rating of this fuse?
The R218676 has a rated current of 6.3 A.
What voltage is the Mersen R218676 rated for?
This miniature fuse is rated for operation at up to 250 V AC.
Is the R218676 a time-lag fuse?
Yes. It has a medium time-lag characteristic that allows it to tolerate temporary inrush currents while protecting against sustained overloads and short circuits.
Which fuse holder is required?
The R218676 should be installed in a compatible fuse holder or clip designed for standard 5 x 20 mm cylindrical fuses.
Trusted by Electrical Professionals Worldwide
Mersen miniature fuses are widely used by panel builders, equipment manufacturers and maintenance engineers to provide reliable, standards-compliant circuit protection across industrial and electrical distribution applications.
