SIBA 6.3x32mm T6.3A 500VAC Slow-Blow Ceramic Fuse

The SIBA is a slow-blow ceramic low-voltage fuse, intended for protecting electrical and electronic circuits requiring a 6.3x32mm miniature fuse with time-delay behaviour.

With 6.3A rated current and 500VAC rated voltage, this fuse is suitable for applications where inrush current or short transient peaks may occur, while still providing reliable protection against sustained overcurrent conditions.

The slow-blow / time-delay characteristic allows short transient overloads to be tolerated, helping prevent nuisance blowing in equipment with higher startup demand, such as power supplies, transformers, small motors, industrial equipment, audio equipment, power electronics and circuits with input capacitors.

The ceramic body, 1.5kA breaking capacity and internal extinguishing agent help provide improved safety in fault conditions when used within its specified limits. The nickel-plated brass contacts ensure good electrical connection in compatible fuse holders.

It is suitable for replacement, maintenance and repair of equipment using 6.3x32mm slow-blow ceramic fuses, always respecting the original value specified by the equipment manufacturer.

Main features

Slow-blow ceramic fuse
Manufacturer / brand: SIBA
Fuse type: low voltage
Fuse characteristic: time-delay / slow-blow
Rated current: T6.3A
Rated voltage: 500VAC
Format: miniature cylindrical
Fuse size: 6.3x32mm
Breaking capacity: 1.5kA
Breaking characteristic: 10In max. 300ms
Maximum voltage drop: 110mV
I²t energy: 215A²s
Contact material: brass
Contact plating: nickel-plated
Listed property: extinguishing agent
Main application: overcurrent protection
Suitable for fuse holders compatible with 6.3x32mm fuses
Suitable for maintenance, repair and protection of compatible circuits

Recommended applications

Power supplies
Electronic equipment
Low-voltage electrical equipment
Circuits with moderate inrush current
Compatible transformers and auxiliary circuits
Audio equipment
Industrial and bench equipment
Power input protection
Repair of equipment using 6.3x32mm fuses
Replacement of equivalent T6.3A / 500VAC slow-blow fuses
Applications requiring a ceramic fuse with high breaking capacity

Important note

Before replacement, always confirm the rated current, rated voltage, physical size, fuse type, operating characteristic, breaking capacity and specification indicated on the original equipment.

This fuse is a slow-blow / time-delay T6.3A type. It should not be replaced with a fast-acting fuse, a different current value or a fuse with lower voltage/breaking capacity without technical confirmation, as this may compromise equipment protection or cause damage.

Always work with the equipment disconnected from electrical power. In mains-powered equipment or devices with internal capacitors, ensure safe discharge and absence of voltage before replacing the fuse. If the fuse blows again, the cause of the fault should be investigated before replacing it again.