CMB02070X6802GB200 [VISHAY]

RES SMD 68K OHM 2% 1W 0207;
CMB02070X6802GB200
型号: CMB02070X6802GB200
厂家: VISHAY    VISHAY
描述:

RES SMD 68K OHM 2% 1W 0207

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中文:  中文翻译
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CMB 0207  
Vishay Beyschlag  
www.vishay.com  
High Pulse Load Carbon Film MELF Resistors  
FEATURES  
• Approved to the safety requirements of  
REG.-Nr. B583  
IEC 60065, 14.2.a (= VDE 0860, 14.1.a)  
VDE-REG.-Nr. B583  
• AEC-Q200 qualified  
• Special carbon film technology  
• Up to 3 kW single pulse capability  
• ESD capability: 16 kV, human body model  
• Sulfur resistance verified according to  
ASTM B 809  
• Surge voltage capability up to 10 kV 1.2/50 μs pulse  
• Material categorization: for definitions of compliance  
please see www.vishay.com/doc?99912  
CMB 0207 carbon film MELF resistors with advanced pulse  
load capability are the perfect choice for the protection of  
circuitry with signal and mains input lines from surge pulses.  
The resistors are also suitable for circuits exposed to high  
levels of electromagnetic interference or electro-static  
discharge. The applications are in all fields of automotive,  
telecommunication, industrial and medical equipment.  
APPLICATIONS  
• Automotive  
• Telecommunication  
• Industrial  
• Medical equipment  
TECHNICAL SPECIFICATIONS  
DESCRIPTION  
CMB 0207  
0207  
DIN size  
Metric size code  
RC6123M  
Resistance range  
2.2 to 1.5 M  
5 ꢀ; 2 ꢀ; 1 ꢀ  
see TCR graph  
1.0 W  
Resistance tolerance  
Temperature coefficient  
(1)  
Rated dissipation, P70  
Operating voltage, Umax. ACRMS/DC  
500 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  
750 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: 11-Feb-16  
Document Number: 28755  
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  
CMB 0207  
Vishay Beyschlag  
www.vishay.com  
MAXIMUM RESISTANCE CHANGE AT RATED DISSIPATION  
OPERATIONE MODE  
STANDARD  
0.4 W  
POWER  
1.0 W (1)  
Rated dissipation, P70  
CMB 0207  
Operating temperature range  
Permissible film temperature, F max.  
-55 °C to 125 °C  
125 °C  
-55 °C to 155 °C  
155 °C  
CMB 0207  
1000 h  
2.2 to 10 k  
0.5 ꢀ  
2.2 to 10 k  
1 ꢀ  
Max. resistance change at P70  
for resistance range, |R/R| after:  
8000 h  
1 ꢀ  
2 ꢀ  
Note  
(1)  
Specified power rating requires dedicated heat sink pads.  
TEMPERATURE COEFFICIENT AND RESISTANCE RANGE  
TYPE / SIZE  
TCR  
TOLERANCE  
RESISTANCE  
2.2 to 15   
16 to 1.5 M  
16 to 1 M  
E-SERIES  
E24  
5 ꢀ  
CMB 0207  
see TCR graph  
2 ꢀ  
E24  
1 ꢀ  
E24; E96  
PACKAGING  
PACKAGING  
DIMENSIONS  
TYPE / SIZE  
CODE  
QUANTITY  
PACKAGING STYLE  
WIDTH  
PITCH  
Antistatic blister tape  
acc. IEC 60286-3 Type 2a  
on reel  
B2  
B7  
2000  
7000  
Ø 180 mm / 7"  
Ø 330 mm / 13"  
CMB 0207  
12 mm  
4 mm  
PART NUMBER AND PRODUCT DESCRIPTION  
Part Number: CMB02070X4701GB200  
C
M
B
0
2
0
7
0
X
4
7
0
1
G
B
2
0
0
TYPE / SIZE  
VERSION  
TCR  
VALUE  
3 digit value  
TOLERANCE  
PACKAGING  
CMB0207  
0 = neutral  
X = no indication  
J = 5 ꢀ  
G = 2 ꢀ  
F = 1 ꢀ  
B2  
B7  
1 digit multiplier  
Multiplier  
8 = *10-2  
9 = *10-1  
0 = *100  
1 = *101  
2 = *102  
3 = *103  
4 = *104  
Product Description: CMB 0207 2 % B2 4K7  
CMB  
0207  
2 %  
B2  
4K7  
TYPE  
SIZE  
TOLERANCE  
PACKAGING  
RESISTANCE VALUE  
CMB  
0207  
5 %  
2 %  
1 %  
B2  
B7  
100R = 100   
4K7 = 4.7 k  
Note  
Products can be ordered using either the PART NUMBER or the PRODUCT DESCRIPTION.  
Revision: 11-Feb-16  
Document Number: 28755  
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  
CMB 0207  
Vishay Beyschlag  
www.vishay.com  
DESCRIPTION  
MATERIALS  
Vishay acknowledges the following systems for the  
regulation of hazardous substances:  
Production of the CMB 0207 specialty MELF resistor 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 (Al2O3). Nickel plated steel termination caps are firmly  
pressed on the coated rods. Products with a resistance of  
15 or lower are made without trimming, whereas a special  
laser is used to achieve a target value of 16 or above  
by smoothly cutting a helical groove in the resistive layer  
without damaging the ceramics. The resistor elements are  
covered by a protective coating designed for electrical,  
mechanical and climatic protection. The terminations  
receive a final pure matte tin on nickel plating. Four or five  
color code rings designate the resistance value and  
• 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:  
• 2000/53/EC End-of-Life Vehicle Directive (ELV) and  
Annex II (ELV II)  
tolerance in accordance with IEC 60062 (1)  
.
• 2011/65/EU Restriction of the Use of Hazardous  
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,  
Substances  
Directive  
(RoHS)  
with  
amendment  
2015/863/EU  
• 2012/19/EU Waste Electrical and Electronic Equipment  
Directive (WEEE)  
Type 2a (1)  
.
Vishay pursues the elimination of conflict minerals from its  
supply chain, see the Conflict Minerals Policy at  
www.vishay.com/doc?49037.  
ASSEMBLY  
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  
Where applicable the resistors are tested in accordance with  
EN 140401-803 which refers to EN 60115-1, EN 60115-8  
and the variety of environmental test procedures of the  
IEC 60068 (1) series.  
production  
or  
requalification,  
however,  
excellent  
solderability is proven after extended storage in excess of  
10 years. The permitted storage time is 20 years.  
Vishay  
Beyschlag  
has  
achieved  
Approval  
of  
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.  
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  
The resistors are qualified according to AEC-Q200.  
alcohols, esters and aqueous solutions. The suitability of  
conformal coatings, potting compounds and their  
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 MINI-MELF Resistors of  
case size 0204” (www.vishay.com/doc?28717)  
Notes  
(1)  
The quoted IEC standards are also released as EN standards with the same number and identical contents.  
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.  
(2)  
(3)  
(4)  
The SVHC list is maintained by the European Chemical Agency (ECHA) and available at http://echa.europa.eu/candidate-list-table.  
Revision: 11-Feb-16  
Document Number: 28755  
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  
CMB 0207  
Vishay Beyschlag  
www.vishay.com  
FUNCTIONAL PERFORMANCE  
0.5  
W
0
-50  
0
50  
70  
100  
C
150  
Ambient Temperature  
ϑamb  
Derating - Standard Operation  
1
W
0.5  
0
-50  
0
50  
70  
100  
C
150  
Note  
(1) Specified power rating requires dedicated heat sink pads  
ϑamb  
Ambient Temperature  
Derating - Power Operation  
10 000  
W
1000  
1K0  
100  
<
1K0  
10  
1
0.1  
1 µs  
10 µs  
100 µs  
1 ms  
10 ms  
100 ms  
1 s  
10 s  
Pulse Duration ti  
̅
Maximum pulse load, single pulse; applicable if P 0 and n 1000 and Û 4 kV;  
for permissible resistance change equivalent to 8000 h operation in power operation mode.  
Single Pulse  
Revision: 11-Feb-16  
Document Number: 28755  
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  
CMB 0207  
Vishay Beyschlag  
www.vishay.com  
10 000  
W
1K0  
<
1K0  
1000  
100  
10  
1
0.1  
1 µs  
10 µs  
100 µs  
1 ms  
10 ms  
100 ms  
1 s  
10 s  
Pulse Duration ti  
̅
Maximum pulse load, continuous pulses; applicable if P P (ϑamb) and Û 4 kV;  
for permissible resistance change equivalent to 8000 h operation in power operation mode.  
Continuous Pulse  
10K  
V
1K  
100  
10  
CMB 0207  
Ω
1
10  
100  
1K  
10K  
100K  
1M  
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)  
Resistance Value R  
1.2/50 Pulse  
10K  
V
1K  
100  
10  
CMB 0207  
Ω
1
10  
100  
1K  
10K  
100K  
1M  
Pulse load rating in accordance with IEC 60115-1, 4.27; 10 µs/700 µs; 10 pulses  
at 1 min intervals; for permissible resistance change 0.5 % (0.5 ꢀ R + 0.05 Ω)  
Resistance Value R  
10/700 Pulse  
Revision: 11-Feb-16  
Document Number: 28755  
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  
CMB 0207  
Vishay Beyschlag  
www.vishay.com  
0
-100  
-200  
-300  
CMB 0207  
-400  
ppm/K  
-500  
1
Ω
10  
100  
1K  
10K  
100K  
1M  
Resistance Value R  
Temperature Coefficent (TCR) (typical curve)  
1
µV/V  
0.1  
CMB 0207  
0.01  
Ω
100  
1K  
10K  
100K  
1M  
Resistance Value  
R
In accordance with IEC 60195  
Current Noise Voltage Ratio  
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: 45 ꢀ 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.  
Revision: 11-Feb-16  
Document Number: 28755  
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  
CMB 0207  
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:  
CMB 0207  
2.2 to 1.5 M  
4.5  
4.8  
-
-
Resistance  
-
5 ꢀ R; 2 R; 1 R  
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;  
;
Endurance at 70 C:  
power operation mode  
1.5 h on; 0.5 h off;  
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 (Ba)  
30 (Db)  
1 (Aa)  
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)  
30 min at LCT;  
30 min at UCT;  
LCT = -55 °C; UCT = 125 °C  
4.19  
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 )  
4.13  
4.22  
-
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;  
6 (Fc)  
Vibration  
(0.25 ꢀ R + 0.1)  
amplitude 1.5 mm or  
200 m/s2; 7.5 h  
Revision: 11-Feb-16  
Document Number: 28755  
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  
CMB 0207  
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:  
CMB 0207  
2.2 to 1.5 M  
IEC 61340-3-1 (1)  
3 pos. + 3 neg.  
(equivalent to MIL-STD-883,  
method 3015)  
;
Electrostatic discharge  
(human body model)  
4.40  
4.17  
4.18  
-
(0.5 ꢀ R + 0.05 )  
CMB 0207: 16 kV  
Solder bath method;  
SnPb40;  
non-activated flux;  
(215 3) °C; (3 0.3) s  
Good tinning (95 ꢀ covered);  
no visible damage  
58 (Td)  
Solderability  
Solder bath method;  
SnAg3Cu0.5 or  
SnAg3.5; non-activated flux;  
(235 3) °C; (2 0.2) s  
Good tinning (95 ꢀ covered);  
no visible damage  
Solder bath method;  
(260 5) C; (10 1) s  
(0.5 ꢀ R + 0.1 )  
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  
(0.5 ꢀ 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: 11-Feb-16  
Document Number: 28755  
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  
CMB 0207  
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)  
CMB 0207  
Note  
5.8 + 0/- 0.15  
2.2 + 0/- 0.2  
3.2  
D + 0/- 0.2  
1.1 0.1  
79  
Color code marking is applied according to IEC 60062 (1) in four bands (E24 series) or five bands (E96 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 indicates the special carbon  
film type.  
PATTERN STYLES FOR MELF RESISTORS  
X
G
Y
Z
RECOMMENDED SOLDER PAD DIMENSIONS  
WAVE SOLDERING  
REFLOW SOLDERING  
TYPE / SIZE  
G
(mm)  
Y
(mm)  
X
(mm)  
Z
(mm)  
G
(mm)  
Y
(mm)  
X
(mm)  
Z
(mm)  
CMB 0207  
2.8  
2.1  
2.6  
7.0  
3.2  
1.7  
2.4  
6.6  
Notes  
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. Specified power rating above 125 °C requires dedicated heat-sink pads, which to a great extend depend  
onboard materials and design. 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. They do not guarantee any supposed thermal properties, particularly as these are  
also strongly influenced by many other parameters.  
Still, the given solder pad dimensions will be found adequate for most general applications, e.g. those referring to “standard operation  
mode”. Please note however that applications for “power operation mode” require special considerations for the design of solder pads and  
adjacent conductor areas.  
(1)  
The quoted IEC standards are also released as EN standards with the same number and identical contents.  
Revision: 11-Feb-16  
Document Number: 28755  
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  
CMB 0207  
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  
1 to 9.99  
LAST DIGIT  
8
9
1
2
3
4
5
• The subsequent 4 digits indicated the resistor type,  
specification and packaging; see the 12NC table.  
10 to 99.9  
• The remaining 4 digits indicated the resistance value:  
- The first 3 digits indicated the resistance value.  
100 to 999   
1 kto 9.99 k  
10 kto 99.9 k  
100 kto 999 k  
1 Mto 9.99 M  
- The last digit indicated the resistance decade in  
accordance with the 12NC Indicating Resistance  
Decade table.  
Historical 12NC Example  
The 12NC of a CMB 0207 resistor, value 47 kwith 2 ꢀ  
tolerance, supplied in blister tape of 2000 units per reel was:  
2312 199 24703.  
HISTORICAL 12NC - Resistor Type and Packaging  
CODE 2312 ... .....  
DESCRIPTION  
BLISTER TAPE ON REEL  
TYPE  
TOL.  
5 ꢀ  
2 ꢀ  
1 ꢀ  
B2 2000 UNITS  
B7 7000 UNITS  
189 3....  
199 3....  
199 2....  
199 1....  
CMB 0207  
189 2....  
189 1....  
Revision: 11-Feb-16  
Document Number: 28755  
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  
www.vishay.com  
Vishay  
Disclaimer  
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE  
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.  
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively,  
“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other  
disclosure relating to any product.  
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or  
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all  
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,  
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular  
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Statements regarding the suitability of products for certain types of applications are based on Vishay's knowledge of typical  
requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements  
about the suitability of products for a particular application. It is the customer's responsibility to validate that a particular product  
with the properties described in the product specification is suitable for use in a particular application. Parameters provided in  
datasheets and / or specifications may vary in different applications and performance may vary over time. All operating  
parameters, including typical parameters, must be validated for each customer application by the customer's technical experts.  
Product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited  
to the warranty expressed therein.  
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or for that of subsequent links.  
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining  
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Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk. Please  
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© 2021 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED  
Revision: 09-Jul-2021  
Document Number: 91000  
1

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