Common symbols and terminology in electronic technology--application techniques

Cj...... Junction capacitance Junction Capacitor
Ηv ... Rectification Efficiency rectification Efficiency
I (AV) ... Average Forward Rectified current forward average rectified currents
IBO ... Breakover Current transition Currents
Id...... Stand-off Reverse Leakage Current off-state reverse leakage currents
IF ... DC Forward current forward DC currents
Ifm...... Maximum DC Forward Current Max forward DC currents
IFSM ... Peak Forward surge current forward surge peak currents
Ifrm ... Repetitive Peak Forward Current forward repetitive peak currents
Ih...... Holding Current Maintenance currents
Io...... Mean Forward current forward average currents
IPPM ... Maximum Peak Impulse Current maximum pulse peak currents
Irr...... Reverse Recovery Current Reverse recovery
IR ... Reverse leakage current Reverse leakage currents
Irm...... Maximum Reverse leakage Current maximum reverse leakage currents
Irrm ... Repetitive Peak Reverse Current repetitive peak reverse currents
Irsm ... Maximum non-repetitive Reverse Peak Current maximum reverse non-repetitive peak currents
Itrm ... Repetitive Peak on-state Current repetitive peak state currents
ITSM ... Non repetitive surge Peak on-state current non-repetitive surge peak open state currents
IT ... Test current
I2T ... Rating for fusing the square current of the forward surge current
Irrm ... Peak repetitive Reverse current reverse repetitive peak currents
IZ ... Zener Current Zener
Izm ... Maximum Zener Current Maximum Zener currents
PM (AV) ... Maximum steady state power dissipation maximum steady consumption
pppm ... Peak Pulse power dissipation peak impulse consumption
Ptot ... Total power dissipation
Qrr ... Recovered Charge recovery charge
Rθja ... Thermal resistance (Junction to ambient) resistance (junction to environment)
RΘJC ... Thermal resistance (Junction to case) resistance (knot to casing)
Rθjl ... Thermal resistance (Junction to leads) resistance (knot to leader)
Ta...... Ambient temperature ambient temperature
Tc...... Case Temperature Tube Shell temperature
Td...... Time Duration Duration
Tf...... Fall Time Down
TFR ... Forward Recovery Time Forward recovery
Tj...... Junction Temperature Junction Temperature
Tl...... Lead Temperature Inlet temperature
Tr...... Rise Time Up
TRR ... Reverse Recovery Time Reverse recovery
Tp...... Pulse Duration Pulse Duration
Tstg ... Storage Temperature Storage Temperature
Tt...... Temperature (SMD) of the temperature of the terminals (SMD) leader End
V (BR) ... Reverse breakdown voltage Reverse Breakdown voltage
Vbo ... Breakover Voltage Transition Voltage
Vc...... Clamping-Voltage clamp voltage
VDC, VR ... DC Reverse voltage Reverse DC voltage
Vf...... Forward Voltage forward Voltage
VFM ... Maximum Forward voltage Maximum forward voltage
VFR ... Forward Recovery voltage Forward recovery voltage
Viso ... Isolation voltage Insulation voltage
VO ... Output voltage of voltage
Vrm...... Maximum recurrent Peak Reverse voltage maximum repetitive peak reverse voltage
Vrms ... RMS input voltage root-mean-square voltage
Vrrm ... Peak repetitive Reverse voltage reverse repeat peak voltage
Vrsm ... Maximum non-repetitive Peak Reverse voltage maximum reverse repeat peak voltage
VTM ... Peak on-state Voltage Peak open Voltage
VWM ... Working Stand-off voltage State operating voltage
VZ ... Zener Voltage Zener Voltage
Zz...... Dynamic Zener Impedance dynamical Zener impedance
︱+vbo︱-︱vbo︱ ... Symmetry of Breakover voltage symmetry transition voltage
︱± V︱ ... Dynamic breakover voltage Spring back voltage (negative resistance)
Αv (BR) ... Maximum Reverse voltage temperature coefficient maximum reverse voltage temperature coefficient
Αvz ... Temperature coefficient of temperature coefficient of Zener voltage zener voltage
duty cycle  (ratio of pulse duration of full cycle)   duty factor (sustained by pulse ratio) Complete cycle of   time)