How To Guide 4Windows

Electronic Component Symbols and Abbreviation


A Ampere (AC rms or DC) a Ampere (peak) A/D Analog to digital AC Alternating current
AC/DC Alternating current or direct current
ADC Analog-to-digital converter AF Audio frequency Ah Ampere hour
AM Amplitude modulation
AM/FM Amplitude modulation or Frequency modulation
AWG American wire gauge
B Transistor Base electrode
B Magnetizing Flux density
BCD Binary coded decimal
BJT Bipolar junction transistor BV Breakdown voltage
BVCEO Breakdown voltage, collector-to-emitter junction reverse biased (base open)
BVCES Breakdown voltage, collector-to-emitter junction reverse biased (base shorted)
BVCOB Breakdown voltage, collector-to-base junction reverse biased (emitter open)
BW Bandwidth
c Centi (10 -2 )
C Capacitance or capacitor
C Transistor collector electrode
C (Q) Coulomb
CB Common base configuration
CC Common collector
CE Common emitter
CL Load capacitance
C O Output Capacitance
d Deci (10 -1 )
D/A Digital to analog
DC Direct current
DIP Dual in-line package
E Transistor emitter electrode
EHF Extremely high frequency
EHV Extra high voltage
ELF Extremely low frequency
EMF Electromotive force
EMI Electromagnetic interference
f Frequency
f ab Common base small-signal cutoff frequency
f ae Common emitter small-signal utoff frequency
FET Field effect transistor
FF Flip Flop
FM FM Frequency modulation
f osc Maximum frequency of oscillation
f r Frequency at resonance
G Conductance
G Giga (10 9 )
g m Small-signal transconductance
g M , g FE Static or DC transconductance
G M , G FE Large-signal transconductance
H Henry
H Magnetic field intensity, Magnetizing flux
h hecto (10 2 )
HF High frequency
h fb Common base small signal forward current transfer-ratio
h fe Common emitter small-signal forward current transfer-ratio (base input)
h FE Common emitter DC forward current transfer-ratio, current gain (IC/IB)
h rb Common base small signal reverse transfer voltage ratio (emitter input)
h rc Common collector small signal reverse transfer voltage ratio (base input)
h re Common emitter small signal reverse transfer voltage ratio (base input)
Hz Hertz
I Current
i Instantaneous current
I/O Input/output
I B Base current
IC Integrated circuit
I C Collector current
I CBO , I CO Collector cutoff current (emitter open)
I CEO Collector cutoff current (base open)
I CER Collector cutoff current (specified resistance base-emitter)
I E Emitter current
I EBO Emitter cutoff current (collector open)
I eff Effective current
I F Forward current (DC)
i Fr Forward recovery current (specified instantaneous value)
I O Output current (DC)
IR Infrared
I R Reverse current (DC)
i R Reverse current (peak)
i Rr Reverse recovery current (specified instantaneous value)
I S Secondary current
i surge Surge current
Z Zener current
ZK Zener knee current
I ZM Zener maximum current
ZT Zener test current
JFET Junction field effect transistor
K Coefficient of coupling
k kilo (10 3 )
kHz Kilohertz
kWh Kilowatt-hour
L Coil, inductance
LC Inductance-capacitance
LCD Liquid crystal display
LCR Inductance-capacitance-resistance
LDR Light-dependent resistor
LED Light emitting diode
LF Low frequency
L M Mutual inductance
LNA Low noise amplifier
LSI Large scale integration
m Milli (10 -3 )
M Mega (10 6 )
M Mutual conductance
MCU Microcontroller
MF Medium frequency
MHz Megahertz
MI Mutual inductance
mmf Magnetomotive force
MOS Metal oxide semiconductor
MOSFET Metal oxide semiconductor field effect transistor
MPU Microprocessor unit
N Number of turns of inductor/transformer
n Nano (10 -9 )
NC Normally closed
NC No connection
NO Normally open
NPN Negative-positive-negative
OP AMP Operational amplifier
p Pico (10 -12 )
P Power
p Instantaneous power
PAL Programmable Array Logic
PAM Pulse amplitude modulation
P ap Apparent power
P av Average power
PCB Printed circuit board
PCM Pulse-code modulation
P d Power dissipation of device (average)
PDM Pulse-duration modulation
PIV Peak inverse voltage
PLD Programmable Logic Device
PLL Phase locked loop
PM Phase modulation
PNP Positive-negative-positive
POT Potentiometer
P-P Peak to peak
PPM Pulse-position modulation
PRF Pulse repetition frequency
PRT Pulse repetition time
PWM Pulse width modulation
Q Charge, also quality
q Instantaneoush

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