|Photograph courtesy of Draper.co.uk|
Used to protect electronic circuits, normally required to meet regulations for many types of device.
A fuse contains a metal element that will conduct normal currents for operation of the device below the maximum stated current for the fuse.
If current exceeds this rating for a given time the fusible element will heat up and melt, breaking the circuit.
- time lag
- Normal operating current
- Application voltage (AC or DC)
- Ambient temperature
- Overload current and length in time
- Transient operating currents: Start-up or Inrush Currents, Transients or operating modes where currents may be higher than normal operation
- Physical size limitations
- Agency Approvals or Design Standards
- mounting type
- form factor
- ease of removal
- axial leads
- visual indication
- R.F.I. shielding
The interval between a specified overcurrent to the final circuit interruption at rated maximum voltage. It is equal to the sum of the melting time plus the arcing time.
Dual Element Fuse
A fuse having responsive elements of two different fusing characteristics in a single series of fuse.
A vented fuse or fuse unit in which the expulsion effect of gases produced by the arc and the lining of the fuse holder, either alone or aided by a spring, extinguishes the arc.
Single Element Fuse
A fuse having a current responsive element comprising one or more parts with a single fusing characteristic.
- Draper.co.uk Quality Tools Since 1919