Symbols and terminologies commonly used in electronic technology

CJ ...... Junction capacitance Capacitance
Eta v ...... Rectification efficiency rectification Efficiency
I (AV )...... Average forward rectified current forward average rectification current
Ibo ...... Breakover current transition current
Id ...... Stand-off reverse leakage current off-state REVERSE LEAKAGE CURRENT
If ...... DC forward current forward DC Current
IFM ...... Maximum DC forward current maximum forward DC Current
IFSM ...... Peak forward surge current positive peak Surge Current
Ifrm ...... Repetitive Peak forward current positive repetition peak current
Ih ...... Holding current maintenance current
Io ...... Mean forward current forward average current
Ippm ...... Maximum peak impulse current maximum pulse peak current
IRR ...... Reverse recovery current reverse recovery current
IR ...... Reverse Leakage Current REVERSE LEAKAGE CURRENT
Rem ...... Maximum reverse leakage current maximum REVERSE LEAKAGE CURRENT
Irrm ...... Repetitive Peak Reverse Current repeat peak reverse current
Irsm ...... Maximum non-repetitive reverse peak current maximum reverse non-repetitive peak current
Itrm ...... Repetitive Peak on-state current repeated peak on-state current
ITSM ...... Non repetitive surge peak on-state current non-repetitive peak surge on-state current
It ...... Test current test current
I2t ...... Rating for fusing the square pair of forward Surge Current
Irrm ...... Peak repetitive reverse current reverse repetition peak current
Iz ...... Zener current
Izm ...... Maximum Zener current maximum Zener current
PM (AV )...... Maximum steady state power dissipation maximum steady-state power consumption
Pppm ...... Peak pulse power dissipation peak Pulse Power Consumption
Ptot ...... Total power dissipation Total Power Consumption
Qrr ...... Recovered charge resume charge
R θ Ja ...... Thermal Resistance (Junction to ambient) Thermal Resistance (end to environment)
R θ JC ...... Thermal Resistance (Junction to case) Thermal Resistance (end to shell)
R θ JL ...... Thermal Resistance (Junction to lead) Thermal Resistance (end to lead)
Ta ...... Ambient temperature ambient temperature
TC ...... Case temperature Shell Temperature
TD ...... Time Duration duration
TF ...... Fall time drop time
TFR ...... Forward Recovery time forward recovery time
TJ ...... Junction Temperature
TL ...... Lead Temperature
Tr ...... Rise Time increase time
TRR ...... Reverse recovery time reverse recovery time
TP ...... Pulse Duration
Tstg ...... Storage Temperature
TT ...... Temperature of the terminals (SMD) lead end temperature (SMD)
V (BR )...... Reverse breakdown voltage
VBO ...... Breakover voltage turning Voltage
VC ...... Clamping voltage
VDC, VR ...... DC reverse voltage reverse DC voltage
VF ...... Forward Voltage
VFM ...... Maximum forward voltage maximum Forward Voltage
VFR ...... Forward Recovery Voltage positive recovery voltage
Viso ...... Isolation voltage insulation voltage
VO ...... Output voltage output voltage
VRM ...... Maximum recurrent peak reverse voltage maximum repetition peak reverse voltage
VRMS ...... RMS input voltage root mean square input voltage
Vrrm ...... Peak repetitive reverse voltage reverse repetition Peak Voltage
Vrsm ...... Maximum non-repetitive peak reverse voltage maximum reverse non-repetitive peak voltage
Vtm ...... Peak on-state voltage peak on-state voltage
Vwm ...... Working stand-off voltage off-state operating voltage
VZ ...... Zener voltage Zener Voltage
ZZ ...... Dynamic Zener impedance dynamic Zener Impedance
Signature + VBO signature-signature VBO signature ︱...... Breakover voltage symmetry of turning Voltage
︱ ± △V then ︱...... Dynamic breakover voltage bounce voltage (negative resistance)
Alpha V (BR )...... Maximum reverse voltage temperature coefficient maximum reverse voltage Temperature Coefficient
α VZ ...... Temperature Coefficient of Zener voltage Temperature Coefficient of Zener Voltage
Duty Cycle (ratio of pulse duration of full cycle) null factor (full cycle made of pulse ratio duration)