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MERSEN FUSE 400V SA 0,125 A 5.20 MI5SA40V0,125
Mersen T078930 MI5SA40V0.125 semiconductor miniature fuse rated at 0.125 A and 400 V AC, with a medium time-lag characteristic, 5 x 20 mm size and clip mounting.
£5.54
Why Choose the Mersen T078930 MI5SA40V0.125 Semiconductor Miniature Fuse?
The Mersen T078930 (MI5SA40V0.125) is a compact 5 × 20 mm semiconductor miniature fuse designed to protect sensitive electronic components from damaging overcurrents. Part of the Mersen SA 400 V fuse range, it combines dependable fault interruption with a medium time-lag characteristic suitable for circuits that may experience brief current surges during normal operation.
With a rated current of 0.125 A and an IEC rated voltage of 400 V AC, the T078930 provides precise protection for low-current electronic and industrial control circuits. Its medium time-lag response allows short-duration inrush currents to pass while disconnecting sustained overloads and short-circuit faults.
The fuse has a compact clip-mounted format and a minimum breaking capacity of 10 kA. This makes it suitable for industrial electronics, instrumentation, automation equipment and semiconductor-based systems where reliable protection and space-efficient installation are important.
Key Advantages
- Compact semiconductor miniature fuse for sensitive electronic circuits.
- 0.125 A current rating for precise low-current protection.
- 400 V AC IEC voltage rating.
- Medium time-lag characteristic tolerates brief current surges.
- 10 kA minimum breaking capacity for dependable fault interruption.
- Compact 5 × 20 mm format for space-limited equipment.
Key Features
- Mersen MI5SA40V0.125 miniature fuse.
- Manufacturer item number: T078930.
- 0.125 A rated current.
- 400 V AC rated voltage.
- Medium time-lag SA operating characteristic.
- 5 × 20 mm miniature fuse size.
- Clip mounting for compatible fuse holders.
- Designed for semiconductor and sensitive electronic protection.
- Minimum breaking capacity of 10 kA.
- RoHS compliant.
Reliable Protection for Sensitive Electronic Components
Semiconductor miniature fuses are designed to interrupt potentially damaging fault currents before sensitive components are exposed to excessive thermal or electrical stress. The medium time-lag characteristic of the Mersen T078930 also helps prevent unnecessary fuse operation when a circuit experiences a short and acceptable inrush current.
Its compact dimensions, high breaking capacity and low current rating make this fuse particularly suitable for control circuits, measuring equipment, power electronics and industrial systems requiring accurate overcurrent protection.
Typical Applications
- Semiconductor protection circuits.
- Industrial automation equipment.
- Electronic control systems.
- Instrumentation and measuring equipment.
- Low-current power supply circuits.
- Industrial and OEM electronic assemblies.
Technical Specifications
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| Current | 0.125 A | |
|---|---|---|
| Voltage | 400 V | |
| Device Type | Fuse link | |
| Fuse Type | Miniature, Semiconductor | |
| Fuse Size | 5x20 mm | |
| Fuse Class | Time delay | |
| Manufacturer | Mersen | |
| Series | Semiconductor Miniature Fuses Size 5 × 20 SA 400 V | |
| Model | MI5SA40V0.125 | |
| Item number | T078930 | |
| Product type | Semiconductor miniature fuse | |
| Rated current | 0.125 A | |
| Rated voltage | 400 V AC IEC | |
| Current type | AC | |
| Operating characteristic | Medium time-lag (SA) | |
| Fuse size | 5 × 20 mm | |
| Mounting type | Clip mounting | |
| Minimum breaking capacity | 10 kA | |
| Total clearing I²t at rated voltage | 0.00123 A²s | |
| Pre-arcing I²t | 0.002 A²s | |
| EAN / UPC | 3605340032932 | |
| RoHS compliant | Yes |
Frequently Asked Questions
What is the Mersen T078930 used for?
The Mersen T078930 is used to protect sensitive semiconductor devices and electronic circuits from sustained overloads and short-circuit currents.
What is the current rating of the Mersen T078930?
The fuse has a rated current of 0.125 A.
What voltage is the T078930 rated for?
The Mersen T078930 has an IEC rated voltage of 400 V AC.
What does the SA operating characteristic mean?
SA identifies the fuse as having a medium time-lag characteristic, allowing brief current surges while providing protection against sustained overcurrents.
How is the Mersen T078930 installed?
The 5 × 20 mm fuse is designed for clip mounting within a compatible fuse holder or electronic assembly.
Trusted by Electrical and Electronics Engineers Worldwide
Mersen semiconductor miniature fuses are used by equipment manufacturers, automation engineers and electronics professionals to provide dependable overcurrent protection for sensitive industrial and electronic systems.
