Table 5-1. Reference Designations, Abbreviations and Multipliers
REFERENCE DESIGNATIONS
A
Assembly F Fuse
RT Thermistor
AT
Attenuator, Isolator,
FL Filter
S
Switch
Limiter, Termination
HY
Circulator T
Transformer
B
Fan, Motor
J Electrical Connector TB
Terminal Board
BT Battery
(Stationary Portion), TC
Thermocouple
C Capacitor Jack
TP Test Point
CP
Coupler
K
Relay
U
Integrated Circuit,
CR
Diode, Diode
L
Coil, Inductor
Microcircuit
Thyristor, Step
M
Meter
V
Electron Tube
Recovery Diode, MP Miscellaneous
VR
Breakdown Diode
Varactor
Mechanical Part
(Zener),
DC Directional Coupler
P
Electrical Connector
Voltage Regulator
DL
Delay Line
(Movable Portion), W
Cable, Wire, Jumper
DS
Annunciator, Lamp, Plug
X
Socket
Light Emitting
Q
Silicon Controlled Y
Crystal Unit
Diode (LED), Rectifier (SCR), (Piezoelectric,
Signaling Device Transistor,
Quartz)
(Visible) Triode Thyristor Z Tuned Cavity,
E
Miscellaneous Electrical Part R
Resistor
Tuned Circuit
A
4 Across Flats, Acrylic,
Air (Dry Method),
Ampere
4DJ
Adjust, Adjustment
4NSI American National
Standards Institute
(formerly
USASI-ASA)
4SSY
Assembly
4WG
American Wire Gage
B
3CD
Binary Coded
Decimal
3D
Board, Bundle
3E-CU
Beryllium Copper
3NC
Type of Connector
3RG
Bearing, Boring
3RS
Brass
ABBREVIATIONS
BSC
Basic
CNDCT Conducting,
BTN Button
Conductive,
Conductivity,
C
Conductor
CONT Contact,
C Capacitance, Continuous,
Capacitor, Control,
Center Tapped,
Controller
Cermet, Cold, CONV Converter
Compression CPRSN Compression
CCP Carbon Composition CUP-PT Cup Point
Plastic cw Clockwise,
CD
Cadmium, Card, Continuous Wave
Cord
CER Ceramic
CHAM Chamfer
CHAR Character,
D
Characteristic,
Charcoal
D
Deep, Depletion,
CMOS Complementary
Depth, Diameter,
Metal Oxide Direct Current
Semiconductor DA Darlington
Replaceable Parts 5-3
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