DIGIT 1 - D DOORVANINAGAR (Common to All the Series)

15 DIGIT CODING SYSTEM

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

D X X X X X X X X X X X X X X

DIGIT 1 - D DOORVANINAGAR (Common to all the Series)

DIGIT 2 and 3 - COMPONENT’S NAME AS FOLLOWS

A1 -TRANSISTORS

A2 -DIODE

A3 -INTEGRATED CIRCUIT

A4 -CRYSTALS

A5 -VALVES & TUBES

A6 -MAGNETIC MATERIAL

C1 -CAPACITOR

C2 -RESISTOR

C3 -COIL FORMER

C4 -CONNECTOR

C5 -FUSE/PROTECTOR

C6 -RELAYS

C7 -SWITCHES

C8 -KNOB

C9 -TERMINAL

D1 -METERS

D2 -LAMPS

D3 -SPEAKERS

D4 -M/W COMPONENTS

D5 -CHOKES

D6 -MTG. ACCESSORIES

D7 -HOLDERS

D8 -MICROPHONES

D9 -MISC. COMPONENTS

DIGIT No. 4 and 5

SUB CLASSIFICATION OF THE DEVICE

Ex: TYPE OF CONSTRUCTION AND MATERIAL USED.

DIGIT No. 6,7,8,9,10 and 11

VALUE OF THE DEVICE OR RUNNING SERIAL NUMBER.

DIGIT No. 12 and 13

WATTAGE, WORKING VOLTAGE, PACKAGE, PIN CONFIGURATION, TYPE OF COUPLING, TERMINATION STYLE, CHANGE OVER METHOD AND LENTH OF WIRE etc.

DIGIT No. 14 and 15

TOLERANCE, TEMPERATURE, FREQUENCY, CLAMPING TYPE, DEFENCE OR NON-DEFENCE .

NOTE: AT ANY POINT OF TIME ‘NS’ DENOTES ‘ NO SIGNIFICANCE’.

TRANSISTORS

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

D A 1 X X X X X X X X X X X X

DIGIT 1 - D DOORVANINAGAR (Common to all the Series)

DIGIT 2 and 3 - A1 TRANSISTOR

DIGIT 4TH & 5TH

A1 -Germanium PNP

A2 -Germanium NPN

A3 -Germanium PNP matched pair

A4 -Germanium NPN matched pair

B1 -Silicon PNP

B2 -Silicon NPN

B3 -Silicon PNP matched pair

B4 -Silicon NPN matched pair

C1 -FET – ‘N’ Channel Type

C2 -MOS FET

C 3 -Gallium Arsenide & FET / HEMT

D1 -Uni Junction Type

E1 -Silicon NPN Photo Transistor

DIGIT 6th to 11th

Sl. No. from 000001 to 999999

DIGIT 12th and 13th (Package code)

(For Sl. No.157 onwards)

B2 - To – 1

B3 - To – 5

B4 - To – 18

B5 - To – 39

B6 - To – 72

B7 - To – 46

C1 - To – 3

C2 - To – 66

C3 - To – 39 Epoxy

C4 - To – 106 Epoxy

D1 - To – 92

D2 - To – 220

D3 - To – 126

D4 - To – 60

D5 - Special package list

D6 - To – 218

E1 - To - 18 Epoxy

F4 - SOT 23

S1 -

F5 - SO-8

DIGIT 14th & 15 th

D1 - Defence

D2 - General purpose

NOTE: AT ANY POINT OF TIME ‘NS’ DENOTES ‘ NO SIGNIFICANCE’

D I O D E

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

D A 2 X X X X X X X X X X X X

DIGIT 1 - D DOORVANINAGAR (Common to all the Series)

DIGIT 2 and 3 - A2 DIODES

DIGIT 4th & 5th

A1 -Germanium Signal

A2 -Germanium Rectifier

A3 -Germanium Switching

A4 -Germanium Bride

A5 -Germanium M/W

A6 -germanium SCR

A7 -Germanium Varacter

A8 -Germanium Limiter

B1 -Silicon Signal

B2 -Silicon Rectifier

B3 -Silicon Switching

B4 -Silicon Bridge

B5 -Silicon M/W

B6 -Silicon SCR

B7 -Silicon Varacter

B8 -Silicon Limiter

B9 -Silicon Schottky Rectifier

(dual diode)

C1 -Selenium Halfwave Aircooled

C2 -Selenium Centre Tap

C3 -Selenium Half Bridge

C4 -Selenium Full Bridge

C5 -Selenium Voltage doubler

C6 -Selenium Incomplete Bridge

E1 -Light Emitting

G1 -Zener 0.1W

G2 -Zener 0.2W

G3 -Zener 0.25W to .5 W

G4 -Zener 1.0W

G5 -Zener 3.0W

G6 -Zener 5.0W

G7 -Zener 10W

G8 -Zener 10W Defence

G9 -Zener 20W

J -Zener 1.0W Defence

DIGIT 6th to 11th

1) Sl .No.from 000001 to 999999.

2) For Zener Diode, indicator

Ex: 430001 for 4.3 V

470001 for 4.7 V

120002 for 12 V

DIGIT 12th & 13th

A1 -SOD-23 (Philips & Siemens)

A2 -SOD-52 “ “

A3 -DO-27A (Meltron)

A4 -DO-15 (Punjab Semiconductor)

A5 -DO-85 (BEL)

A6 -DO-5 (Jedec)

A7 -TO-39 (Jedec)

A8 -TO-3 (Jedec)

A9 -TO-46 (HP)

B1 -DO-35

B3 -DO-4 Metal Case)

B4 -DO-41 Epoxy

B5 -DO-H/S Glass Envelope

B7 -DO-34 Hermetic Glass package

C1 -3m LED Long Leads

D2 -(TO-39 for SCR)

D3 -DO-13

D4 -TO-5

D5 -TO-220

D6 -SOD-123

(Small out line device)

D7 -PLCC

D8 -SO-8

D9 -DO-214AA(SMB)

E1 -DO-214AC(SMA)

E2 -DO-214AB(SMD)

E3 -KBPM

E4 -KBL

E5 -DO-201

E6 -TO-247

F3 & F4 -SOT23

For Zeners

A6 5% tolerance

A7 10% tolerance

A8 20% tolerance

S1 SMD

DIGIT 14th & 15th

D1 Defence

D2 Non-defence

B1 Temp.Compensated

A6 MLL-34

NOTE: AT ANY POINT OF TIME ‘NS’ DENOTES ‘ NO SIGNIFICANCE’

INTEGRATED CIRCUITS

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

D A 3 X X X X X X X X X X X X

DIGIT 1 - D DOORVANINAGAR (Common to all the Series)

DIGIT 2 and 3 - A3 INTEGRATED CIRCUITS

DIGIT 4 & 5th

A1- Monolithic Digital TTL Logic

A2- Monolithic Digital ECL Logic

B1- Monolithic MOS Digital Logic

B2- Monolithic C MOS Digital Logic

B3- Monolithic Bi polar C MOS

C1- Monolithic Linear Logic

D1- Mixed signal device, Anolog/Digital

E1- Hybrid Logic Thick film

E2- Hybrid Logic Thin film

E3- Hybrid Micro ckt. assembly

F1- Opto Electronics Building

Blocks

G1- Medium Scale Integration

System

(M S I )

H1- Large Scale Integrated Systems

DIGITS 6 & 7 (function & Description)

01 Gate s

02 Flip – Flop

03 Counters/Timers

04 Shift Registers

05 Memories

06 Decoder/Demultiplexer

07 Data Selector/Multiplexer

08 Adders

09 Multi Vibrators

10 Parity generator

11 Operational Amplifiers/IF/RF AMP

12 Dual OP AMP

13 Comparators & Sense Amplifiers

14 Voltage Regulators

15 HF Amplifiers

16 GP/Audio Amplifiers

17 Balanced Modulators

18 Channel Amplifiers

19 Communication circuits

20 Timers

21 Phase Locked Loop

22 Hybrid Attenuator Pads

24 Digital to ECL Oscillator

25 Detector

26 MECL to MTTL Translator/ECL to TTL

27 Line receivers

28 Line receiver/Schmitt triggers

29 Line Drivers/Receivers

30 Analog Switch

31 OPTO Electronics

32 Power Amplifiers

33 Arithmetic Elements

34 Code converters

35 Interface Elements

36 Drivers

37 Buffer/Drivers

38 Expanders

39 Buffers

40 Resistor Net work/Area Network

41 En coders

42 Character Generator

43 Switch/Bilateral

44 Latches/Registers

45 Multiplexers

46 Opto Isolator/opto couplers

47 Transformers

48 Special functions

49 Multiplexer/Demultiplexer

50 Microprocessors

51 Inverters

52 Trans receiver

53 Modulator/Demodulator

54 Diode/Transistor Array

55 Dialer

56 Filter

57 Micro computer

58 Delay elements

59 Oscillators

60 Computer peripheral

61 Codec Coder/Decoder

62 Delay line

63 Alarm clocks

64 Tone ringers (DTMF)

65 Video amplifier

66 Programmable logic Array (Ceramic Array)

67 Dual amplifiers (Sensi Amplifier)

68 Signal processor (DSP)

69 PCM Repeater

70 Communication ICs

71 ASIC

72 Radio receivers

73 Digital Switching elements

74 MMI (Monolithic) M/WIC)

75 Circuit preventive element

76 Controller

77 Voltage monitoring

78 DTMF Receiver

80 Transient Voltage Suppressor

8 to 11th Digit

Serial No.

0001

0002 etc

DIGITS 12th & 13th

A1 14 pin Dual in line Plastic package (DIP)

A2 14 pin Dual in line Ceramic pkg. (DIC)

A3 24 pin DIP

A4 24 pin DIC

A5 40 pin DIP

A6 40 pin DIC

A7 28 pin DIP

A8 28 pin DIC

B1 16 pin DIP

B2 16 pin DIC

B3 18 Pin DIP

B4 Special package

B5 20 pin DIP

B6 20 pin DIC

B7 22 Pin DIP

B9 22 Pin DIC

C1 TO 3 package

C2 TO 99

C3 TO 100

C4 TO 39

C5 TO 5 (12 Leads)

C6 TO 46 (3 Leads & Latches)

C7 To 220

C8 To 92

C9 TO 202 Plastic

D1 8 pin DIP

D2 8 Pin DIC

D3 6 pin DIP

D4 48 pin DIC

D5 68 pin DIC

D6 5 Pin Plastic DD (Q Package)

D8 PLCC (Plastic leaded chip)

D9 CLCC (Ceramic)

E1 4 pin DIP

E2 6 pin DIP

G1 32 pin DIP

G2 32 pin DIC

G3 30 pin DIP

G4 30 pin DIP

F2 SIL Hybrid Circuit pag

F3 DIL Hybrid circuit

F4 48 pin DIP

F6 Plastic pin GRID ARAY (PGD)

F7 Ceramic pin GRID ARAY (PGD)

F8 Plastic quad flat pkg.

F9 Ceramic quad flat pkg.

S1 SMD Pkg.

S2 Special Package

DIGITS 14TH & 15TH

C1 Plastic commercial grade (0 –70 C )

C3 Screening (for plastic pkg.) (- 40 to 85 C)

D1 Defence

D2 Non-Defence

D3 Screening for Defence

N1 Ceramic commercial grade (0ºC– 70ºC)

N3 Screening (for Ceramic pkg.) ( -55ºC to + 125ºC )

T1 0oC to 70 o C

T2 -40 o C to 85 o C

T3 -55oC to 125oC

T4 -25ºC to 70oC

T5 0ºC to 85ºC (equivalent to 0ºC ambient to115ºC case)

T6 -10ºC to 70ºC

T7 -40ºC to 150ºC

T8 -40ºC to 100ºC

CRYSTAL

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

D A 4 X X X X X X X X X X X X

DIGIT 1 - D DOORVANINAGAR (Common to all the Series)

DIGITS 2 and 3 A4 - CRYSTAL

DIGITS 4 and 5 B1 - CRYSTAL NON OVEN CONTROLLED

DIGITS 6 to 11 - SERIAL NUMBER

DIGITS 12 and 13

Denotes PPM at given temperature. Refer drawing

A1 10

A2 20

A3 30

A4 40

A5 50

A6 100

A7 200

A8 300

DIGITS 14 and 15 - For frequency, refer the drawing.

ELECTRONIC TUBES & VALUES

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

D A 5 X X X X X X X X X X X X

DIGIT 1 - D DOORVANINAGAR (Common to all the Series)

DIGITS 2 and 3 A5 - ELECTRONIC TUBES & VALUES

DIGITS 4th & 5th

A1 M/w Oscillator & Amplifiers

A2 UHF Oscillator tubes

6th to 11th digits Serial Numbers 000001 to 999999

12th & 13th Digits No Significance

14th & 15th Digits

D1 – Defence

D2 – Non-Defence

MAGNETIC CORE MATERIALS

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

D A 6 X X X X X X X X X X X X

DIGIT 1 - D DOORVANINAGAR (Common to all the Series)

DIGITS 2 and 3 A6 - MAGNETIC CORE MATERIALS

DIGITS 4th & 5th (Sizes in mm)

A1 14 x 8

A2 18 x 11

A3 22 x 13

A4 26 x 16

A5 30 x 19

A6 36 x 22

A7 11 x 7

A8 42 x 29

6 to 11 Digits

For gapped cores, AL value (Inductance in nano-Henrys)

For ungapped cores, AL value / me value / OL value

For details, drawing DA6-A1 to DA6-A8 may be referred.

DIGITS 12 & 13th (Material Grades)

A1 10 MHz (Filter)

A2 1 MHz (Filter)

A3 100 KHz (Filter)

A4 40 MHz (Filter)

A5 N 30 Transformer

A6 H 5 Transformer

A8 Power applications

DIGITS 14th & 15th

(Tolerance & Adjustments)

A3 AL + 5% without adjustment

A4 (AL + 3%) + Adjuster (5%)

A5 AL + 3% without adjustment

A6 (AL + 3%) + Adjuster (10%)

A7 AL + 10% without Adjustment

A8 AL + 10% without adjustment

A9 AL + 25%

B1 +30% -20%, OL

B3 AL + 5% without central hole

B7 +40 –30%, OL

B9 + 40 – 0%, OL

D1 AL + 30%

P1 AL + 3% with adjustment *

P2 AL + 5% without adjustment *

P3 AL + 10% without adjustment *

P9 AL MIN. OL *

* Special codes

Z1 Minimum

CAPACITORS

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

D C 1 X X X X X X X X X X X X

DIGIT 1 - D DOORVANINAGAR (Common to all the Series)

DIGIT 2 and 3 - C1 CAPACITORS

DIGITS 4th & 5th

A1 Polystrene, Open Heat Sealed Buried foil Axial Lead type

A2 Polstyrene Protected Type with RadialLeads.

A3 Polystrene film Axial lead type

A4 Polystrene film Square type

A5 Polystrene film Rectangular type

A6 Polystrene film Epoxy moulded

A7 Polypropelene film Box radial type

A9 Steroflex Box type

B1 Electrolytic Alluminium High Reliability Axial Leads.

B2 Electrolytic Alluminium Axial Leads General purpose.

B4 ELECTROLYTIC ALLUMINIUM CAN TYPE (Tolerance –10% + 50%).

B6 Electrolytic Alluminium High Reliability Long Life grade Axial leads.

B7 Electrolytic Alluminium High Reliability Radial leads.

B8 Electrolytic Wet Aluminium, High Gain Etched Foil, Radial Leads.

BA Electrolytic Alluminium high Fri,low imp.,high ripple current and long life

BC Electrolytic Wet Alluminium1000Hrs.life at 105 C.

C- Met. Polyester Capacitor

C1 Low voltage axial lead cap.(Defence grade as per JSS)up to 630 V.

C2 High voltage axial lead cap.up to 6 KV.

C3 High voltage axial lead cap. Low voltage Axial leads(Non-Defence as per IS Spec.)

C4 Rectangular box type radial lead cap.

C5 Square type radial lead cap.Rectangular box type radialleads with 5 m.m. pitch.

C6 Met. Polypropylene cap.(No Metalisation).

C7 Polyester radial lead cap.

D- Ceramic Capacitors

D1 Ceramic Capacitor TC (Temperature Compensated) Type

(for with leads and SMD)-Special Type-Small value upto 300 pf

D2 Ceramic Capacitor General purpose types.

E-Tantalum Capacitors

E1 High Temp. Axial leads cap. –55 to +125 C

E4 Low Temp. Axial leads cap.-40 to +85 C

E5 Radial lead Type –40 to +85 C

E6 Clamp Capacitors.

If 4 th and 5 th digit isE1,E2,E4,E5 , E6 and F1 than 12th and 13th digits will represent voltage.

F- Silver Mica Capacitors

F1 Epoxy coated radialleads.

DIGIT 6 to 11 - VALUE OF THE CAPACITOR

Code Capacitance value PF

100002 - 10 pf

100003 - 100 pf

100006 - 100,000 pf

Last Digit indicates Decimal point position

Note: Al.elec. cap. ,tant.elec.cap and met.polyester cap.in micro farad.

DIGIT 12 and 13 - Working voltage

A1 - 63V

A2 - 160V

A3 - 630V

A5 - 6.5V

A6 - 10V

A7 - 16V