Diode Data Sheet
– Provides maximum ratings, electrical characteristics, mechanical data, graphs of parameters, etc. for electrical device in use.
– Several parameters are seen in a data sheet for diodes:
Maximum ratings
i) VRRM: (Peak repetitive reverse voltage).
– Maximum reverse peak voltage that can be applied repetitively across the diode.
ii) VR: (DC blocking voltage)
– Maximum reverse dc voltage that can be applied across the diode.
iii) VRSM: (Nonrepetitive peak reverse voltage)
– Maximum reverse peak value of nonrepetitive voltage that can be applied across diode.
iv) IO: (Average rectified forward current)
– Maximum average value of a 60Hz rectified forward current.
v) IFSM: (Nonrepetitive peak surge current)
– Maximum peak value of nonrepetitive (one cycle) forward surge current.
– A graph for different temperatures is generally available.
vi) TA:
– Ambient temperature.
vii) TJ:
– Operating junction temperature range.
viii) Tstg:
– Storage junction temperature range.
Electrical Characteristics
i) vF: Instantaneous voltage across the forward-biased diode when forward current is 1 A at 25oC. Shown generally shown by a graph.
ii) VF(avg): Maximum forward voltage drop averaged over a full cycle.
iii) IR: Maximum current when diode is reverse-biased.
iv) IR(avg): Maximum reverse current averaged over one cycle (when reverse-biased with an ac voltage).
