CMA02040X5600GB300 [VISHAY]

RES SMD 560 OHM 2% 0.4W 0204;
CMA02040X5600GB300
型号: CMA02040X5600GB300
厂家: VISHAY    VISHAY
描述:

RES SMD 560 OHM 2% 0.4W 0204

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中文:  中文翻译
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CMA 0204  
Vishay Beyschlag  
www.vishay.com  
High Pulse Load Carbon Film MINI-MELF Resistors  
FEATURES  
• Special carbon film technology  
• Surge voltage capability up to 4 kV 1.2/50 μs  
pulse  
• ESD capability: 6 kV, human body model  
• AEC-Q200 qualified  
• Intrinsic sulfur resistance  
• Material categorization:  
for definitions of compliance please see  
www.vishay.com/doc?99912  
CMA 0204 carbon film MELF resistors with advanced pulse  
APPLICATIONS  
• Automotive  
load capability are the perfect choice for the protection of  
circuitry with signal or mains input lines from surge pulses.  
The resistors are also suitable for circuits exposed to high  
levels of electromagnetic interference or electrostatic  
discharge. The applications are in all fields of automotive,  
telecommunication, industrial, and medical equipment.  
• Telecommunication  
• Industrial  
• Medical equipment  
TECHNICAL SPECIFICATIONS  
DESCRIPTION  
CMA 0204  
0204  
DIN size  
Metric size code  
Resistance range  
Resistance tolerance  
Temperature coefficient  
RC3715M  
10 to 100 k  
2 ꢀ  
see TCR graph  
0.4 W  
(1)  
Rated dissipation, P70  
Operating voltage, Umax. ACRMS/DC  
200 V  
(1)  
Permissible film temperature, F max.  
155 °C  
Operating temperature range (1)  
Permissible voltage against ambient (insulation):  
1 min; Uins  
-55 °C to 155 °C  
300 V  
Failure rate: FITobserved  
0.1 x 10-9/h  
Note  
(1)  
Please refer to APPLICATION INFORMATION below  
APPLICATION INFORMATION  
The power dissipation on the resistor generates a temperature rise against the local ambient, depending on the heat flow  
support of the printed-circuit board (thermal resistance). The rated dissipation applies only if the permitted film temperature is  
not exceeded. Furthermore, a high level of ambient temperature or of power dissipation may raise the temperature of the solder  
joint, hence special solder alloys or board materials may be required to maintain the reliability of the assembly.  
These resistors do not feature a limited lifetime when operated within the permissible limits. However, resistance value drift  
increasing over operating time may result in exceeding a limit acceptable to the specific application, thereby establishing a  
functional lifetime. At the maximum permissible film temperature of 155 °C the useful lifetime is specified for 8000 h. The  
designer may estimate the performance of the particular resistor application or set certain load and temperature limits in order  
to maintain a desired stability.  
Revision: 27-Mar-17  
Document Number: 28717  
1
For technical questions, contact: melf@vishay.com  
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT  
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000  
CMA 0204  
Vishay Beyschlag  
www.vishay.com  
MAXIMUM RESISTANCE CHANGE AT RATED DISSIPATION  
OPERATION MODE  
STANDARD  
0.25 W  
POWER  
0.4 W  
Rated dissipation, P70  
CMA 0204  
Operating temperature range  
Permissible film temperature, F max.  
-55 °C to 125 °C  
125 °C  
-55 °C to 155 °C  
155 °C  
CMA 0204  
1000 h  
10 to 100 k  
1 ꢀ  
10 to 100 k  
2 ꢀ  
Max. resistance change at P70 for resistance range,  
|R/R| after:  
8000 h  
2 ꢀ  
4 ꢀ  
TEMPERATURE COEFFICIENT AND RESISTANCE RANGE  
TYPE / SIZE  
TCR  
TOLERANCE  
RESISTANCE  
E-SERIES  
CMA 0204  
see TCR graph  
2 ꢀ  
10 to 100 k  
E24  
PACKAGING  
PACKAGING  
DIMENSIONS  
TYPE / SIZE  
CODE  
QUANTITY  
PACKAGING STYLE  
WIDTH  
8 mm  
PITCH  
B3 = BL  
B0  
3000  
Ø 180 mm / 7"  
Ø 330 mm / 13"  
Antistatic blister tape  
acc. IEC 60286-3 Type 2a  
CMA 0204  
4 mm  
10 000  
PART NUMBER AND PRODUCT DESCRIPTION  
Part Number: CMA02040X4701GB300  
C
M
A
0
2
0
4
0
X
4
7
0
1
G
B
3
0
0
TYPE / SIZE  
VERSION  
TCR  
X = no indication  
RESISTANCE  
TOLERANCE  
PACKAGING  
CMA0204  
0 = neutral  
3 digit value  
1 digit multiplier  
Multiplier  
9 = *10-1  
G = 2 ꢀ  
B3  
B0  
0 = *100  
1 = *101  
2 = *102  
3 = *103  
Product Description: CMA 0204 2 % BL 4K7  
CMA  
0204  
2 %  
BL  
4K7  
TYPE  
SIZE  
TOLERANCE  
PACKAGING  
RESISTANCE  
CMA  
0204  
2 %  
BL  
B0  
100R = 100   
4K7 = 4.7 k  
Note  
Products can be ordered using either the PART NUMBER or the PRODUCT DESCRIPTION  
Revision: 27-Mar-17  
Document Number: 28717  
2
For technical questions, contact: melf@vishay.com  
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT  
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000  
CMA 0204  
Vishay Beyschlag  
www.vishay.com  
DESCRIPTION  
MATERIALS  
Vishay acknowledges the following systems for the  
regulation of hazardous substances:  
Production of the CMA 0204 specialty MELF resistors with  
advanced pulse load capability is strictly controlled and  
follows an extensive set of instructions established for  
reproducibility. A homogeneous and dense carbon film is  
deposited on a high grade ceramic body (85 ꢀ Al2O3).  
Nickel plated steel termination caps are firmly pressed on  
the coated rods. A special laser is used to achieve the target  
value by smoothly cutting a helical groove in the resistive  
layer without damaging the ceramics. The resistors are  
covered by protective coating designed for electrical,  
mechanical and climatic protection.The terminations receive  
a final pure matte tin on nickel plating. Four color code rings  
designate the resistance value and tolerance in accordance  
• IEC 62474, Material Declaration for Products of and for the  
Electrotechnical Industry, with the list of declarable  
substances given therein (2)  
• The Global Automotive Declarable Substance List  
(GADSL) (3)  
• The REACH regulation (1907/2006/EC) and the related list  
(4)  
of substances with very high concern (SVHC)  
supply chain  
for its  
The products do not contain any of the banned substances  
as per IEC 62474, GADSL, or the SVHC list, see  
www.vishay.com/how/leadfree.  
Hence the products fully comply with the following  
directives:  
with IEC 60062 (1)  
.
• 2000/53/EC End-of-Life Vehicle Directive (ELV) and  
Annex II (ELV II)  
The result of the determined production is verified by an  
extensive testing procedure performed on 100 ꢀ of the  
individual resistors. Only accepted products are laid directly  
into the blister tape in accordance with IEC 60286-3,  
• 2011/65/EU Restriction of the Use of Hazardous  
Substances  
Directive  
(RoHS)  
with  
amendment  
2015/863/EU  
Type 2a (1)  
.
• 2012/19/EU Waste Electrical and Electronic Equipment  
Directive (WEEE)  
ASSEMBLY  
Vishay pursues the elimination of conflict minerals from its  
supply chain, see the Conflict Minerals Policy at  
www.vishay.com/doc?49037.  
The resistors are suitable for processing on automatic SMD  
assembly systems. They are suitable for automatic  
soldering using wave, reflow or vapor phase as shown in  
IEC 61760-1 (1). Solderability is specified for 2 years after  
APPROVALS  
production  
or  
requalification,  
however,  
excellent  
Where applicable the resistors are tested in accordance with  
EN 140 401-803 which refers to EN 60115-1, EN 60115-8  
and the variety of environmental test procedures of the  
IEC 60068 (1) series.  
solderability is proven after extended storage in excess of  
10 years. The permitted storage time is 20 years.  
The resistors are completely lead (Pb)-free, the pure matte  
tin plating provides compatibility with lead (Pb)-free  
soldering processes. The immunity of the plating against tin  
whisker growth has been proven under extensive testing.  
Vishay  
Beyschlag  
has  
achieved  
Approval  
of  
Manufacturer” in accordance with IECQ 03-1. The release  
certificate for “Technology Approval Schedule” in  
accordance with CECC 240001 based on IECQ 03-3-1 is  
granted for the Vishay Beyschlag manufacturing process.  
The encapsulation is resistant to all cleaning solvents  
commonly used in the electronics industry, including  
alcohols, esters and aqueous solutions. The suitability of  
conformal coatings, potting compounds and their  
The resistors are qualified according to AEC-Q200.  
processes, if applied, shall be qualified by appropriate  
means to ensure the long-term stability of the whole system.  
RELATED PRODUCTS  
• “Professional Thin Film MELF Resistors”  
(www.vishay.com/doc?28713)  
• “Precision Thin Film MELF Resistors”  
(www.vishay.com/doc?28714)  
• “High Pulse Load Carbon Film MELF Resistors of case  
size 0207” (www.vishay.com/doc?28755)  
Notes  
(1)  
The quoted IEC standards are also released as EN standards with the same number and identical contents  
(2)  
The IEC 62474 list of declarable substances is maintained in a dedicated database, which is available at http://std.iec.ch/iec62474  
The Global Automotive Declarable Substance List (GADSL) is maintained by the American Chemistry Council and available at www.gadsl.org  
The SVHC list is maintained by the European Chemical Agency (ECHA) and available at http://echa.europa.eu/candidate-list-table  
(3)  
(4)  
Revision: 27-Mar-17  
Document Number: 28717  
3
For technical questions, contact: melf@vishay.com  
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT  
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000  
CMA 0204  
Vishay Beyschlag  
www.vishay.com  
FUNCTIONAL PERFORMANCE  
0.5  
W
CMA 0204  
0
-50  
0
50  
70  
100  
°C  
150  
ϑ
Ambient Temperature  
amb  
Derating - Standard Operation  
CMA 0204  
0.5  
W
0
-50  
0
50  
70  
100  
°C  
150  
ϑ
Ambient Temperature  
amb  
Derating - Power Operation  
1000  
P
CMA 0204  
100  
W
10  
1
0.1  
10 ms  
1 µs  
10 µs  
100 µs  
1 ms  
100 ms  
1 s  
10 s  
Pulse Duration ti  
Maximum pulse load, single pulse; applicable if P 0 and n 1000 and U 2 kV;  
for permissible resistance change ꢀ0.5 ꢁ R + 0.05 Ω)  
Single Pulse  
Revision: 27-Mar-17  
Document Number: 28717  
4
For technical questions, contact: melf@vishay.com  
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT  
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000  
CMA 0204  
Vishay Beyschlag  
www.vishay.com  
FUNCTIONAL PERFORMANCE  
1000  
P
CMA 0204  
100  
W
10  
1
0.1  
10 ms  
1 µs  
10 µs  
100 µs  
1 ms  
100 ms  
1 s  
10 s  
Pulse Duration ti  
Maximum pulse load, continuous pulse; applicable if P P ϑamb) and U 2 kV;  
for permissible resistance change ꢀ0.5 ꢁ R + 0.05 Ω)  
Continuous Pulse  
1 kV  
100 V  
CMA 0204  
10 V  
10 Ω  
100 Ω  
1 kΩ  
10 kΩ  
100 kΩ  
1 MΩ  
Resistance Value R  
Pulse load rating in accordance with IEC 60115-1, 4.27; 1,2 μs/50 μs; 5 pulses at 12 s intervals;  
for permissible resistance change (0.5 ꢀ R + 0.05 Ω)  
1.2/50 Pulse  
CMA 0204  
1 kV  
100 V  
10 V  
10 Ω  
100 Ω  
1 kΩ  
10 kΩ  
100 kΩ  
1 MΩ  
Resistance Value R  
Pulse load rating in accordance with IEC 60115-1, 4.27; 10 µs/700 µs;  
10 pulses at 1 minute intervals; for permissible resistance change (0.5 ꢀ R + 0.05 Ω)  
10/700 Pulse  
Revision: 27-Mar-17  
Document Number: 28717  
5
For technical questions, contact: melf@vishay.com  
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT  
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000  
CMA 0204  
Vishay Beyschlag  
www.vishay.com  
FUNCTIONAL PERFORMANCE  
CMA 0204  
- 100  
ppm/K  
- 200  
- 300  
- 400  
- 500  
10 Ω  
100 Ω  
1 kΩ  
10 kΩ  
100 kΩ  
1 MΩ  
10 MΩ  
Resistance Value R  
Temperature coefficient of resistance  
Temperature Coefficient (TCR) (Typical Curve)  
CMA 0204  
1
µV/V  
0.1  
0.01  
100 Ω  
1 kΩ  
10 kΩ  
100 kΩ  
1 MΩ  
Resistance Value R  
In accordance with IEC 60 195  
Current Noise Voltage Ratio  
Revision: 27-Mar-17  
Document Number: 28717  
6
For technical questions, contact: melf@vishay.com  
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT  
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000  
CMA 0204  
Vishay Beyschlag  
www.vishay.com  
TESTS AND REQUIREMENTS  
All tests are carried out in accordance with the following  
specifications:  
The testing also covers most of the requirements specified  
by EIA/ECA-703 and JIS-C-5201-1.  
EN 60115-1, generic specification  
The tests are carried out under standard atmospheric  
conditions in accordance with IEC 60068-1, 4.3, whereupon  
the following values are applied:  
EN 60115-8 (successor of EN 140400), sectional  
specification  
EN 140401-803, detail specification  
IEC 60068-2-xx, test methods  
Temperature: 15 °C to 35 °C  
Relative humidity: 25 ꢀ to 75 ꢀ  
Air pressure: 86 kPa to 106 kPa (860 mbar to 1060 mbar).  
The parameters stated in the Test Procedures and  
Requirements table are based on the required tests and  
permitted limits of EN 140401-803. The table presents only  
the most important tests, for the full test schedule refer to  
the documents listed above. However, some additional  
tests and a number of improvements against those  
minimum requirements have been included.  
A climatic category LCT / UCT / 56 is applied, defined by the  
lower category temperature (LCT), the upper category  
temperature (UCT), and the duration of exposure in the  
damp heat, steady state test (56 days).  
The components are mounted for testing on printed circuit  
boards in accordance with EN 60115-8, 2.4.2, unless  
otherwise specified.  
TEST PROCEDURES AND REQUIREMENTS  
IEC  
EN  
60115-1  
CLAUSE  
60068-2 (1)  
REQUIREMENTS  
PROCEDURE  
TEST  
TEST  
METHOD  
PERMISSIBLE CHANGE (R)  
Stability for product types:  
CMA 0204  
10 to 100 k  
2 ꢀ R  
4.5  
4.8  
-
-
Resistance  
-
At (20 / -55 / 20) °C  
and (20 / 125 / 20) °C  
Temperature coefficient  
see Temperature Coefficient graph  
U = P70 x R Umax.  
;
whichever is the less severe;  
Endurance at 70 °C:  
standard operation mode  
1.5 h on; 0.5 h off;  
-
-
70 °C; 1000 h  
(1 ꢀ R + 0.05)  
(2 ꢀ R + 0.05)  
70 C; 8000 h  
4.25.1  
U = P70 x R Umax.  
whichever is the less severe;  
1.5 h on; 0.5 h off;  
;
Endurance at 70 C:  
power operation mode  
70 °C; 1000 h  
70 C; 8000 h  
(2 ꢀ R + 0.05)  
(4 ꢀ R + 0.05)  
(2 ꢀ R + 0.05)  
(4 ꢀ R + 0.05)  
(1 ꢀ R + 0.1 )  
125 °C; 1000 h  
Endurance at upper category  
temperature  
4.25.3  
4.24  
-
155 °C; 1000 h  
78 (Cab)  
Damp heat, steady state  
(40 2C; 56 days; (93 3) ꢀ RH  
(85 2) °C  
(85 5) ꢀ RH  
Damp heat,  
steady state,  
accelerated  
U = 0.3 x P70 x R 100 V  
4.37  
67 (Cy)  
(2 ꢀ R + 0.1 )  
and U = 0.3 x Umax.  
;
(the smaller value is valid)  
1000 h  
4.23  
Climatic sequence:  
dry heat  
4.23.2  
4.23.3  
4.23.4  
4.23.5  
4.23.6  
4.23.7  
2 (Bb)  
30 (Db)  
1 (Ab)  
13 (M)  
30 (Db)  
-
UCT; 16 h  
55 C; 24 h; 90 ꢀ RH; 1 cycle  
LCT; 2 h  
damp heat, cyclic  
cold  
low air pressure  
damp heat, cyclic  
DC load  
8.5 kPa; 2 h; (25 10) C  
55 C; 24 h; 90 ꢀ RH; 5 cycles  
U = P70 x R Umax.; 1 min  
LCT = -55 C; UCT = 155 °C  
-55 C; 2 h  
(1 ꢀ R + 0.1 )  
-
1 (Aa)  
Cold  
(0.5 ꢀ R + 0.1)  
Revision: 27-Mar-17  
Document Number: 28717  
7
For technical questions, contact: melf@vishay.com  
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT  
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000  
CMA 0204  
Vishay Beyschlag  
www.vishay.com  
TEST PROCEDURES AND REQUIREMENTS  
IEC  
EN  
60115-1  
CLAUSE  
60068-2 (1)  
REQUIREMENTS  
PERMISSIBLE CHANGE (R)  
TEST  
PROCEDURE  
TEST  
METHOD  
Stability for product types:  
CMA 0204  
10 to 100 k  
30 min at LCT;  
30 min at UCT;  
LCT = -55 °C; UCT = 125 °C  
4.19  
4.13  
14 (Na)  
Rapid change of temperature  
5 cycles  
(0.5 ꢀ R + 0.1 )  
(1.5 ꢀ R + 0.1 )  
1000 cycles  
U = 2.5 x P70 x R 2 x Umax.  
whichever is the less severe;  
5 s  
;
;
Short time overload;  
standard operation mode  
(0.25 ꢀ R + 0.1 )  
(0.5 ꢀ R + 0.1 )  
-
U = 2.5 x P70 x R 2 x Umax.  
whichever is the less severe;  
5 s  
Short time overload;  
power operation mode  
Endurance by sweeping;  
10 Hz to 2000 Hz;  
no resonance;  
4.22  
4.38  
6 (Fc)  
Vibration  
(0.25 ꢀ R + 0.1)  
(0.5 ꢀ R + 0.05 )  
amplitude 1.5 mm or  
200 m/s2; 7.5 h  
IEC 61340-3-1 (1)  
3 pos. + 3 neg.  
;
Electrostatic discharge  
(human body model)  
-
(equivalent to MIL-STD-883,  
method 3015)  
CMA 0204: 6 kV  
Solder bath method;  
SnPb40;  
Good tinning (95 ꢀ covered);  
non-activated flux;  
(215 3) °C; (3 0.3) s  
no visible damage  
4.17  
58 (Td)  
Solderability  
Solder bath method;  
SnAg3Cu0.5 or  
Good tinning (95 ꢀ covered);  
SnAg3.5; non-activated flux;  
(235 3) °C; (2 0.2) s  
no visible damage  
Solder bath method;  
(260 5) C; (10 1) s  
(0.5 ꢀ R + 0.1 )  
4.18  
58 (Td)  
Resistance to soldering heat  
Reflow method 2  
(IR / forced gas convection);  
(260 5) °C; (10 1) s  
(0.25 ꢀ R + 0.1 )  
4.29  
4.30  
4.32  
45 (XA)  
45 (XA)  
21 (Ue3)  
Component solvent resistance  
Solvent resistance of marking  
Shear (adhesion)  
Isopropyl alcohol; 50 °C; method 2  
No visible damage  
Isopropyl alcohol; 50 C; method 1,  
Marking legible;  
no visible damage  
toothbrush  
45 N  
No visible damage  
No visible damage;  
no open circuit in bent position  
(0.25 ꢀ R + 0.1)  
4.33  
4.7  
21 (Ue1)  
Substrate bending  
Voltage proof  
Depth 2 mm, 3 times  
-
-
URMS = Uins; 60 s  
No flashover or breakdown  
IEC 60695-11-5 (1)  
needle flame test;  
10 s  
,
4.35  
Flammability  
No burning after 30 s  
Note  
(1)  
The quoted IEC standards are also released as EN standards with the same number and identical contents  
Revision: 27-Mar-17  
Document Number: 28717  
8
For technical questions, contact: melf@vishay.com  
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT  
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000  
CMA 0204  
Vishay Beyschlag  
www.vishay.com  
DIMENSIONS  
L
K
L1  
D
D1  
DIMENSIONS AND MASS  
L
D
(mm)  
L1 min.  
(mm)  
D1  
(mm)  
K
(mm)  
MASS  
(mg)  
TYPE / SIZE  
(mm)  
CMA 0204  
Note  
3.6 + 0/- 0.2  
1.4 + 0/- 0.1  
1.8  
D + 0/- 0.15  
0.75 0.1  
19  
Color code marking is applied according to IEC 60062 (1) in four bands (E24 series). Each color band appears as a single solid line, voids are  
permissible if at least 2/3 of the band is visible from each radial angle of view. The last color band for tolerance is approximately 50 ꢀ wider  
than the other bands. An interrupted brown band between the 2nd and 3rd full band identifies the special carbon film  
PATTERN STYLES FOR MELF RESISTORS  
X
G
Y
Z
RECOMMENDED SOLDER PAD DIMENSIONS  
WAVE SOLDERING  
REFLOW SOLDERING  
TYPE / SIZE  
CMA 0204  
G
Y
X
Z
G
Y
X
Z
(mm)  
(mm)  
(mm)  
(mm)  
(mm)  
(mm)  
(mm)  
(mm)  
1.5  
1.5  
1.8  
4.5  
1.7  
1.2  
1.6  
4.1  
Notes  
The given solder pad dimensions reflect the considerations for board design and assembly as outlined e.g. in standards IEC 61188-5-x (1)  
,
or in publication IPC-7351  
(1)  
The quoted IEC standards are also released as EN standards with the same number and identical contents  
Revision: 27-Mar-17  
Document Number: 28717  
9
For technical questions, contact: melf@vishay.com  
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT  
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000  
CMA 0204  
Vishay Beyschlag  
www.vishay.com  
Last Digit of 12NC Indicating Resistance Decade  
HISTORICAL 12NC INFORMATION  
• The resistors had a 12-digit numeric code starting with  
2312  
RESISTANCE DECADE  
10 to 99.9  
LAST DIGIT  
9
1
2
3
4
• The subsequent 4 digits indicated the resistor type,  
specification and packaging; see the 12NC table  
100 to 999   
• The remaining 4 digits indicated the resistance value:  
- The first 3 digits indicated the resistance value  
1 kto 9.99 k  
10 kto 99.9 k  
100 kto 999 k  
- The last digit indicated the resistance decade in  
accordance with the 12NC Indicating Resistance  
Decade table  
Historical 12NC Example  
The 12NC of a CMA 0204 resistor, value 47 kwith 2 ꢀ  
tolerance, supplied in blister tape of 3000 units per reel was:  
2312 159 24703.  
HISTORICAL 12NC - Resistor Type and Packaging  
CODE 2312 ... .....  
BLISTER TAPE ON REEL  
B0  
DESCRIPTION  
BL  
TYPE  
TOL.  
3000 UNITS  
10 000 UNITS  
CMA 0204  
2 ꢀ  
159 2....  
149 2....  
Revision: 27-Mar-17  
Document Number: 28717  
10  
For technical questions, contact: melf@vishay.com  
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT  
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000  
Legal Disclaimer Notice  
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Vishay  
Disclaimer  
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE  
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“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other  
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© 2021 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED  
Revision: 09-Jul-2021  
Document Number: 91000  
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