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MERSEN FUSE 250V 5SF 12,5A 5X20 MI5SF25V12,5
Mersen W233446 MI5SF25V12,5 fast-acting glass cartridge fuse with a 12.5 A current rating, 250 V AC voltage rating and standard 5 x 20 mm dimensions.
Why Choose the Mersen W233446 5SF Fast-Acting Miniature Fuse?
The Mersen W233446, catalogue reference MI5SF25V12,5, is a compact 5 × 20 mm fast-acting glass cartridge fuse designed to protect electrical equipment and industrial circuits against excessive current. Its quick-response operating characteristic allows it to interrupt abnormal current rapidly, helping reduce the risk of damage to wiring and connected components.
As part of the Mersen 5SF IEC miniature fuse series, the W233446 is intended for electrical distribution circuits and general industrial equipment. Its standard cylindrical dimensions make it compatible with suitable 5 × 20 mm fuse holders, allowing straightforward installation and replacement during maintenance.
The fuse has a rated current of 12.5 A and a rated voltage of 250 V AC. Its transparent glass body supports visual inspection of the fuse element, while nickel-plated brass contact caps provide reliable electrical contact within an appropriately rated fuse holder.
Key Advantages
- Compact 5 × 20 mm miniature cartridge fuse.
- Fast-acting characteristic provides rapid overcurrent protection.
- 12.5 A rated current for electrical and industrial circuits.
- 250 V AC rated voltage for low-voltage equipment.
- Glass body allows convenient visual inspection of the fuse element.
- Standard cylindrical format simplifies installation and replacement.
- Suitable for electrical distribution and general equipment protection.
Key Features
- Mersen 5SF IEC miniature fuse series.
- MI5SF25V12,5 catalogue reference.
- 5 × 20 mm cylindrical fuse dimensions.
- 12.5 A nominal current rating.
- 250 V AC rated voltage.
- Fast-acting fuse characteristic.
- Low-breaking-capacity miniature fuse construction.
- Glass body without extinguishing agent.
- Nickel-plated brass contact caps.
- Manufactured in accordance with IEC 60127-2 Sheet 2.
Rapid Protection for Electrical Equipment
Fast-acting fuses are designed to disconnect a circuit quickly when the current rises beyond an acceptable level. They are commonly used in applications that do not experience prolonged start-up currents and where rapid isolation is required to protect wiring, control components and electrical equipment.
The Mersen W233446 provides replaceable overcurrent protection in a compact glass cartridge format. When correctly selected and installed in a suitably rated fuse holder, it helps protect electrical circuits against sustained overloads and fault currents.
Typical Applications
- Electrical distribution circuits.
- Industrial control panels and machinery.
- Power supplies and electrical equipment.
- Heating and ventilation controls.
- Lighting and auxiliary circuits.
- Test and measurement equipment.
- OEM electrical assemblies.
- General low-voltage circuit protection.
Technical Specifications
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| Current | 12.5 A | |
|---|---|---|
| Voltage | 250 V | |
| Device Type | Fuse link | |
| Fuse Type | Miniature | |
| Fuse Size | 5x20 mm | |
| Fuse Class | Fast acting | |
| Manufacturer | Mersen | |
| Series | 5SF IEC Miniature Fuses | |
| Item number | W233446 | |
| Catalogue number | MI5SF25V12,5 | |
| Product type | Fast-acting miniature cartridge fuse | |
| Fuse size | 5 × 20 mm | |
| Rated current | 12.5 A | |
| Rated voltage | 250 V AC | |
| Operating characteristic | Fast-acting | |
| Breaking capacity | 10 × rated current | |
| Body material | Glass | |
| Construction | Without extinguishing agent | |
| Contact cap material | Nickel-plated brass | |
| Overall length | 20 mm | |
| Body diameter | 5 mm | |
| Approximate weight | 1.2 g maximum | |
| Applicable standard | IEC 60127-2 Sheet 2 | |
| RoHS compliant | Yes | |
| GTIN / EAN | 3605340296228 |
Frequently Asked Questions
What is the Mersen W233446 used for?
The Mersen W233446 is used to protect electrical equipment and industrial circuits against excessive current and short-circuit faults.
What is the current rating of the Mersen W233446?
The fuse has a nominal current rating of 12.5 A.
Is the W233446 fast-acting or time-delay?
The W233446 is a fast-acting fuse, designed to interrupt abnormal current quickly rather than withstand extended inrush currents.
What fuse holder is required for the W233446?
The fuse should be installed in a compatible 5 × 20 mm fuse holder with suitable current, voltage and fault-interruption ratings.
Can the fuse element be visually inspected?
Yes. The W233446 has a transparent glass body that allows the internal fuse element to be visually inspected, although electrical testing may still be required to confirm continuity.
Trusted Circuit Protection from Mersen
Mersen miniature fuses are widely used by electrical engineers, equipment manufacturers and panel builders to provide dependable overcurrent protection for electrical distribution circuits and industrial equipment.
