Why Choose the Mersen X099472 Semiconductor Miniature Fuse?
The Mersen X099472, catalogue number MI6SA25V20P, is a compact and reliable semiconductor miniature fuse designed to protect sensitive electronic components, control apparatus and electrical circuits against damaging overcurrents. It forms part of Mersen’s 6.3 × 32 mm SA miniature fuse range for applications where short-duration current surges may occur during normal operation.
Its medium time-lag SA characteristic allows the fuse to tolerate temporary inrush and transient currents while still providing dependable protection against sustained overloads and short circuits. This operating behaviour makes the X099472 suitable for electronic power supplies, semiconductor equipment, control systems and other installations that require a balance between surge tolerance and effective circuit protection.
Rated at 20 A and 250 V AC, the Mersen X099472 uses a robust ceramic cartridge body with a very high breaking capacity. An integrated striker provides an indication when the fuse has operated, while its ferrule terminals and clip-mounted design allow straightforward installation in compatible 6.3 × 32 mm fuse holders.
Key Advantages
- Medium time-lag SA fuse characteristic accommodates temporary inrush currents.
- 20 A rated current for electronic and industrial control equipment.
- 250 V AC rated voltage for compatible low-voltage circuits.
- Very high breaking capacity supports reliable fault-current interruption.
- Integrated striker indication system helps identify an operated fuse.
- Compact 6.3 × 32 mm ceramic cartridge construction.
Key Features
- Mersen X099472 semiconductor miniature fuse.
- Catalogue number MI6SA25V20P.
- 20 A rated current.
- 250 V AC IEC rated voltage.
- Medium time-lag SA operating characteristic.
- Designed to withstand short-term surge and inrush currents.
- 720 A²s clearing I²t at rated voltage.
- Integrated striker-type trip indication.
- Ceramic cartridge body with ferrule terminals.
- Clip-mounted 6.3 × 32 mm format.
Reliable Protection with Inrush Current Tolerance
Electrical and electronic equipment can experience temporary current peaks during start-up, capacitor charging or switching operations. A medium time-lag fuse such as the Mersen X099472 is designed to withstand these expected short-term surges while operating when an excessive current continues for long enough to endanger the circuit.
The fuse’s ceramic construction and high breaking capacity support reliable operation during fault conditions. Its integrated striker can also assist maintenance teams with fault identification, making the X099472 suitable for control panels, power conversion equipment and electronic systems where efficient servicing is important.
Typical Applications
- Semiconductor devices and electronic control circuits.
- Industrial measuring and control apparatus.
- Electronic power supplies and converters.
- Automation panels and machinery controls.
- Equipment with temporary inrush or transient currents.
- Fuse monitoring systems using striker indication.
