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MERSEN FUSE 250V 5ST 5A 5.20 MI5ST25V5
Mersen Z090550 MI5ST25V5 time-delay glass miniature cartridge fuse rated at 5 A and 250 V AC, supplied in a standard 5 x 20 mm format for industrial circuit protection.
Why Choose the Mersen Z090550 MI5ST25V5 Miniature Fuse?
The Mersen Z090550 MI5ST25V5 is a dependable time-delay miniature cartridge fuse designed to protect electrical distribution circuits, industrial controls and electronic equipment against sustained overloads and short circuits. As part of the Mersen 5ST IEC miniature fuse series, it can tolerate brief current surges while maintaining reliable overcurrent protection.
The fuse uses a standard 5 × 20 mm glass cartridge format, allowing installation in compatible fuse holders and fuse clips. Its transparent body also enables maintenance engineers to inspect the fuse element visually when diagnosing electrical faults or carrying out routine servicing.
With a rated current of 5 A and a rated voltage of 250 V AC, the Z090550 is suitable for circuits with temporary start-up currents, including power supplies, transformers, motors and industrial control equipment. Its time-delay characteristic helps prevent unnecessary fuse operation during normal inrush conditions.
Key Advantages
- Time-delay operation withstands temporary start-up and inrush currents.
- 5 A current rating for industrial and electronic circuits.
- 250 V AC voltage rating for low-voltage equipment protection.
- Standard 5 × 20 mm miniature cartridge format.
- Transparent glass body supports convenient visual inspection.
- Reliable Mersen construction for industrial and OEM applications.
Key Features
- Mersen MI5ST25V5 miniature cartridge fuse.
- 5 A rated current.
- 250 V AC rated voltage.
- Time-delay fuse characteristic.
- Standard 5 × 20 mm dimensions.
- Glass cartridge body with metal end caps.
- Suitable for circuits with temporary current surges.
- Designed for electrical distribution and industrial equipment protection.
Time-Delay Protection for Electrical Equipment
Time-delay fuses are designed to tolerate short-duration current surges that occur when equipment such as motors, transformers and power supplies is energised. This helps avoid nuisance fuse operation while maintaining protection against prolonged overloads and short circuits.
The Mersen Z090550 combines a time-delay operating characteristic with standard miniature dimensions, making it suitable for replacement and original-equipment applications. The fuse rating, voltage and operating characteristic should always be checked against the equipment manufacturer's specification before installation.
Typical Applications
- Industrial control panels.
- Power supplies and power conversion equipment.
- Transformers and inductive loads.
- Motor control and automation circuits.
- Instrumentation and monitoring equipment.
- OEM electrical and electronic assemblies.
Technical Specifications
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| Current | 5 A | |
|---|---|---|
| Voltage | 250 V | |
| Device Type | Fuse link | |
| Fuse Type | Miniature | |
| Fuse Size | 5x20 mm | |
| Fuse Class | Time delay | |
| Manufacturer | Mersen | |
| Series | 5ST IEC Miniature Fuses | |
| Model | MI5ST25V5 | |
| Part number | Z090550 | |
| Product type | Miniature cartridge fuse | |
| Fuse characteristic | Time delay | |
| Rated current | 5 A | |
| Rated voltage | 250 V AC | |
| Fuse size | 5 × 20 mm | |
| Body material | Glass | |
| Terminal type | Cylindrical metal end caps | |
| Mounting | Compatible fuse holder or fuse clip | |
| Application | Electrical distribution and industrial circuit protection |
Frequently Asked Questions
What is the Mersen Z090550 used for?
The Mersen Z090550 provides time-delay overcurrent protection for electrical distribution circuits, industrial controls and equipment that may produce temporary start-up currents.
What is the current rating of the Z090550?
The fuse has a rated current of 5 A.
What voltage is this fuse rated for?
The Mersen Z090550 is rated for circuits operating at up to 250 V AC.
What size is the Mersen Z090550 fuse?
It uses the standard 5 × 20 mm miniature cartridge fuse format.
What does the time-delay characteristic mean?
The time-delay characteristic allows the fuse to withstand brief inrush currents while still interrupting sustained overloads and short circuits.
Trusted by Electrical Professionals Worldwide
Mersen miniature fuses are widely used by panel builders, maintenance engineers and OEM manufacturers to provide dependable circuit protection across industrial and commercial electrical systems.
