The ESKA Feinsicherung 5x20 FST 20A is a glass-tube fuse designed for overcurrent protection in electronic and electrical circuits. It combines a compact 5×20 mm form factor with a fast-acting design to safeguard sensitive components.
0,8 A nominal current with a time-delay (slow-blow) characteristic prevents nuisance tripping under normal inrush conditions
Glass tube construction allows visual inspection of the fuse element for quick fault diagnosis
5×20 mm miniaturised format fits standard fuse holders in compact distribution boards and equipment
Pack of 10 pieces provides sufficient spares for maintenance and replacement cycles
What sets the ESKA 5x20 FST apart
The combination of a slow-blow characteristic with a low 0,8 A rating makes this fuse suitable for circuits where brief current surges are expected, such as capacitive loads or motor starters, without unnecessary interruptions.
Ideal for...
Electronics assembly, industrial control cabinets, and low-voltage distribution systems where precise overcurrent protection is required for components rated up to 0,8 A. Suitable for maintenance technicians and electrical engineers managing small-to-medium installations.
Application of ESKA Feinsicherung 5x20 FST 0.8A
Insert the fuse into a compatible 5×20 mm fuse holder in the circuit to be protected
Verify that the 0.8 A rating matches the downstream component specifications
Replace the fuse after a fault has been cleared and the root cause identified
Keep spare fuses on hand for routine maintenance and unplanned replacements
ESKA is a brand of Elektromaterial, a Swiss electrical wholesaler specialising in components for building and industrial electrical installations. ESKA fuses are designed for standardised 5×20 mm fuse holders and are widely used in distribution boards, control cabinets, and electronic equipment across the Swiss market.
It provides overcurrent protection for circuits with a nominal current of 0.8 A, commonly found in electronic equipment, distribution boards, and industrial control cabinets.
The time-delay (slow-blow) characteristic allows the fuse to tolerate brief current surges without blowing, making it suitable for circuits with capacitive or inductive inrush loads.
The fuse measures 5×20 mm and features a glass tube construction that allows visual inspection of the internal fuse element for quick fault identification.
The product is supplied as a pack of 10 individual glass-tube fuses in their original packaging.
The manufacturer provides a 24-month warranty against material and manufacturing defects.
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