Transtronics Part Numbering System


All Transtronics part numbers start with a one to three characters long prefix to indicate the class of part. The numbers/letters after the prefix will have different meanings depending on the class of part.

The part numbers have the following conventions: A number/letter enclosed in brackets [] are required variables. Numbers/letters enclosed in braces {} are optional.

Part Numbers

AB- Anti-static Bag AB-[W]X[H]" AB-3X4.5"

W width in inches 3
H height in inches 4 1/2
"=inch mm= millimeter

Prefix and part numbers

ADH Adhesive

AE- Axial Electrolytic AE-[C]/[VJ{-s) AE-100/25-.25

C capacitance in uF l00uF
V: minimum voltage rating 25 V
S spacing in Inches .25" spacing


Gel = Gell cell

BX- Boxes and enclosures BX-[M]-[P3 BX-Bopla-E450

M = Manufacture name BOPLA
P = Manufactures part number E450

CC- Ceramic SM Multilayer Capacitor CC104X7R9

CC= Cermic Capacitor
X7R = dielectric codes
9 = 50V (5 = 6.3V, 6 =10V, 7=16V,8=25V,0=100V)

CD- Ceramic Disk cap CD-[CCM](/\fl(T3{%){5} CD-102/200Z5UM.3

C= capacitance in pF ~ 1000
M= multiplier ~2
V= voltage default is 50 ~ 200V
T= dielectric codes~ Z5U
%= TOLERANCE COde ~ 20%
S= Spacing in inches

CF- Carbon film resistor Thru hole CF[W]-[O] CF25-3K3

W= Wattage in 100th of watts 250 MW or 1/4W
0= value of ohms 3.3K ohms

CM- Ceramic Monolithic thru hole CM-[CCM]C/V){T)(%)(s) CM-1O4Z5UM.1

C= capacitance in pF ~ 100,000
M= multiplier ~ 4

CON- connectors CCN-[N][T][5]{m} CON-37SDRT-F-IDC

N= Number of pins 37
T= type subD right angle
S= Sex female
M = Misc Insulation displacement

CP- Ceramic Plate Capacitor CP[CCM]{/V}{T}{-s} CP-104Z5M-.2

C = capacitance in pF 10 - 100,000pf
M= multiplier
V= voltage default is 50 200V
S= Spacing in inches Default : .2" .2" spacing

CT- Capacitor Tantalum Surface mount CT[C/V]{p] CT10/10A

V = Voltage rating 10 Volts
P = EIA package code EIA A

D- diode D-[N} D-1N4148

N= manufactures part number 1N4148

DT- bip Tantalum DT-[C]/[V]{-s} DT-100/25-.25

C= capacitance in uF 100uf
V= voltage rating 25 V
S= spacing in inches .250 spacing

FU- Fuses FU-[A][S][V] FU-6AGC125

A= Amperage 6 amps
S= Style AGC
V= Voltage 125 Volts

H- Headers H-[R][S]{C} H-SIM5MM

R= number and type of rows single row
S= Sex Male
C= Centers if not .10 5mm

HW- Hardware HW(T){D}{L){M} HW#4-40x1/2PP HW-M3X14PP

Type= M= metric #=number number Metric
D=diameter 4-40 3mm
L= length ½” 14mm
M= misc Pan Philip Pan phili

L- Inductor L-[V]/[A] L-187/4

V= Value in uH 187uh
A= saturation current 4A



N= industry number T1-3/4
C= color RED
H= horizontal vert is default Horizontal

MF- Metal film Resistor MF[P]{T}{C}-[V] MF25C1206T100-3K3

C= case code C1206 12 x 6 mils
M3216 .32 x .16mm
T = tempco in ppm T100
P= Power 250 MW or 1/4W
V= value in ohms 3.3K ohms

MO Metal Oxide Resistor M0{C}[P]-[V] MOS100-3K3

C= Case style Small case
P= Power 1000 MW or 1W
V= value in ohms 3.3K ohms

MOV- Metal oxide varistor MOV-[N] MOV-13OLA2OA

N: Industry number 13OLA2OA

NE- Neon lamps NE-[N] NE-61230

N= industry number

NTC- Negative temperature coefficient thermistor NTC-[N] NTC-ERT-JZET202J

N = part number ERT-JZET202J

Q Transistor Q-[N] Q-2N2222

N= Industry Number 2N2222

PCB- printed circuit board PCB-[N)[V} CB-BDR3-1

N= Name of board BDR
V= Version number 3-1

PK- Packaging Material


PF- Poly film capacitor PF-[C]{/VXT}f-s} PF-2/200J-.2
C= capacitance in uF 10-l00,000pf 200p
V= voltage default is 50 200V
T=tolerance J=5%
Spacing in inches Default : .1" .2" spacing

PT- potentiometer PT-{D][O3[S]LV](t) PT-1X4V1-100RT1O

D= Diameter of size in tenths .1X.4"
Q= orientation H=horz or V=vert vertical
S= lead spacing .100
T= Number of turns default= 1 10

PTC- Positive temperature coefficient thermistor PTC-[N] NTC-PRT-JZET202J

N = part number PRT-JZET202J

PW- Power wire wound resistor PW[W]-[V] PW5-2R
W= Wattage 5 watts
V= Value 2 ohms

SE- Surface mount electrolytics SE-[C]/[V]-[S] SE-105/35-4.3x4.3

C= capacitance in uF luF
V= minimum voltage rating 35 V
S= land pattern in mm 4.3X4.3

ST- Surface mount Tantulum SE-[C]/[V] SE-105/35

C= capacitance in uF luF
V= minimum voltage rating 35 V

RE- Radial[[Component_Lead_Terminology| [sic]] Electrolytics RE-[C]/[V]{-s} RE-100/25-.6

C= capacitance in uF lOOuF
V= minimum voltage rating 25 V
S= spacing in inches .6" SPACING

RL- Relay RL-LN]

N Industry number

RM- Radial Mica capacitor RM-[CCM](/V)(T)~-5} RM-102J-.3

C= capacitance in pF 10 - 1000pf
M= multiplier 2
V= voltage default is 50 50V
T= Tolerance code J
5= Spacing in inches Default = .2" .3" spacing

SIR- Resistor sip SIR{W}[W]}[N][P][V]G{T} SIR100W10P9B4K7G2

W= Milliwatt per element 100mW
N= Number of pins 10 pins
E= Number of resistors 9 resistors
V= Value 4.7K ohms
C= configuration-(B)USSED or (I) Isolated Bussed
T= Tolerance G2 is 2%

SOC- Sockets SOC-[T][N]{M} SOC-DIP40M

T= Type DIP or SIP DIP
N= number of pins 40 pins
M= Contact type Machine contact



SW- Switch SW-[T][A]@[V][P]-[N] SW-SPDTM10@12D34872

T= TYPE SPDT Momentary
A= Amperage rating 10A
V= voltage of amp rating 12
P= A for AC D for DC DC
N = Manufactures part # 34872

TF- Thick film Resistor TF[P]{T}-[V] TF25T100-3K3

P= Power 250 MW or 1/4W
T= tempco in ppm T100
V= value in ohms 3.3K ohms

U- Integrated Circuit U-[N] U-LM374

N= Industry number 374

W- wire W-[G][U]-[C][T] W-18UL1015-BLK-B

G= gauge 18
U= UL number UL1015
C= Color Black
T= type S = solid B= bondcoat Bondcoat (AKA top-coat)

XF- Transformer XF-[N] XF-ST-6-16

N = manus number ST-6-16

XT- Crystal XT[N]-[F] XT-1-4M0

N= case code 1
F= Frequency 4Mhz

Cad nomenclature for standard decal types

Default is mils

S is a standard 60 mil pad
R shows a Round part (with only one dimension)
P shows that the part is polarized and needs to be placed with a symbol to insure correct orientation.
D Is for a Diode outline.

Cad notes

NPN transistors have a schematic decal that can be numbered in more than one way. Thus there have to be NPN-EBC and NPN-BCE. And the pin s are numbered left to right 1-2-3.

A further problem is that standard decals such as SOT-23 may well have more than one numbering system. Thus the need to set a standard that looking at the top of the part, with the writing upside-up, pin one is on the lower left hand corner and they count counter clockwise as all chips should. Thus you will see some SOT23s that don’t follow this convention, and are number clockwise. These need to be designated as SOT-132. A 5-pin version (SOT23-5) would normally be SOT23-5-12345.

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This information may have errors; It is not permissible to be read by anyone who has ever met a lawyer.
Use is confined to Engineers with more than 370 course hours of electronic engineering for theoretical studies.
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