MMU 0102, MMA 0204, MMB 0207 - Precision
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Precision Thin Film MELF Resistors
MMU 0102, MMA 0204 and MMB 0207 precision thin film
MELF resistors are the perfect choice for most fields of
modern professional electronics where reliability and
stability is of major concern. The typical applications in the
fields of automotive, telecommunication, and medical
equipment reflect the outstanding level of proven reliability.
FEATURES
• Approved according to EN 140401-803
• AEC-Q200 qualified
• Advanced metal film technology
• Superior stability: class 0.05
• Intrinsic sulfur resistance
• Material categorization:
for definitions of compliance please see
www.vishay.com/doc?99912
APPLICATIONS
• Automotive
• Telecommunication
• Industrial
• Medical equipment
Note
(1) Please refer to APPLICATION INFORMATION below
APPLICATION INFORMATION
When the resistor dissipates power, a temperature rise above the ambient temperature occurs, dependent on the thermal
resistance of the assembled resistor together with the printed circuit board. The rated dissipation applies only if the permitted
film temperature is not exceeded.
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.
TECHNICAL SPECIFICATIONS
DESCRIPTION MMU 0102 MMA 0204 MMB 0207
DIN size 0102 0204 0207
Metric size code RC2211M RC3715M RC6123M
Resistance range 22 to 332 k10 to 511 k15 to 1 M
Resistance tolerance ±0.5 %; ± 0.25 %; ± 0.1 % ± 0.25 %; ± 0.1 %
Temperature coefficient ± 25 ppm/K; ± 15 ppm/K
Rated dissipation, P70 (1) 0.2 W 0.25 W 0.4 W
Operating voltage, Umax. ACRMS/DC 150 V 200 V 350 V
Permissible film temperature,
F max. (1) 125 °C
Operating temperature range (1) -55 °C to 125 °C
Permissible voltage against ambient (insulation):
1 min, Uins 200 V 300 V 500 V
Failure rate: FITobserved 0.1 x 10-9/h
MMU 0102, MMA 0204, MMB 0207 - Precision
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Note
• The presented operation modes do not refer to different types of resistors, but actually show examples of different loads, that lead to
different film temperatures and different achievable load-life stability (drift) of the resistance value. A suitable low thermal resistance of the
circuit board assembly must be safeguarded in order to maintain the film temperature of the resistors within the specified limits. Please
consider the application note “Thermal Management in Surface-Mounted Resistor Applications” (www.vishay.com/doc?28844) for
information on the general nature of thermal resistance
Note
(1) Approval to EN 140401-803, “Version A”, is not available for TCR ± 15 ppm/K; ± 0.5 %
MAXIMUM RESISTANCE CHANGE AT RATED DISSIPATION
OPERATION MODE PRECISION STANDARD
Rated dissipation, P70
MMU 0102 0.06 W 0.2 W
MMA 0204 0.07 W 0.25 W
MMB 0207 0.11 W 0.4 W
Operating temperature range -10 °C to 85 °C -55 °C to 125 °C
Permissible film temperature,
F max. 85 °C 125 °C
Max. resistance change at P70 for
resistance range, |R/R| after:
MMU 0102 22 to 332 k22 to 332 k
MMA 0204 10 to 511 k10 to 511 k
MMB 0207 15 to 1 M15 to 1 M
1000 h 0.05 % 0.1 %
8000 h 0.1 % 0.2 %
225 000 h 0.3 % 0.6 %
TEMPERATURE COEFFICIENT AND RESISTANCE RANGE
TYPE/SIZE TCR TOLERANCE RESISTANCE E-SERIES
MMU 0102
± 25 ppm/K
± 0.25 % 47 to 332 k
E24, E192
± 0.1 % 100 to 221 k
± 15 ppm/K (1)
± 0.5 % 22 to 100 k
± 0.25 % 47 to 100 k
± 0.1 % 100 to 100 k
MMA 0204
± 25 ppm/K
± 0.25 % 20 to 511 k
E24, E192
± 0.1 % 20 to 511 k
± 15 ppm/K (1)
± 0.5 % 10 to 332 k
± 0.25 % 20 to 332 k
± 0.1 % 20 to 332 k
MMB 0207
± 25 ppm/K
± 0.25 % 15 to 1 M
E24, E192± 0.1 % 20 to 1 M
± 15 ppm/K ± 0.1 % 20 to 1 M
MMU 0102, MMA 0204, MMB 0207 - Precision
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Notes
• Products can be ordered using either the PART NUMBER or the PRODUCT DESCRIPTION
• Approval to EN 140401-803, “Version A”, is not available for ± 15 ppm/K, ± 0.5 %
PACKAGING
TYPE/SIZE CODE QUANTITY PACKAGING STYLE WIDTH PITCH PACKAGING
DIMENSIONS
MMU 0102
B1 1000 Antistatic blister tape acc.
IEC 60286-3, Type 2a 8 mm 4 mm Ø 180 mm/7"
B3 = BL 3000
B0 10 000 Ø 330 mm/13"
M8 8000 Bulk case acc.
IEC 60286-6 -- -
MMA 0204
B1 1000
Antistatic blister tape acc.
IEC 60286-3, Type 2a 8 mm 4 mm Ø 180 mm/7"
B3 = BL 3000
B0 10 000 Ø 330 mm/13"
M3 3000 Bulk case acc.
IEC 60286-6 -- -
MMB 0207
B1 1000 Antistatic blister tape acc.
IEC 60286-3, Type 2a 12 mm 4 mm Ø 180 mm/7"
B2 2000
B7 7000 Ø 330 mm/13"
PART NUMBER AND PRODUCT DESCRIPTION
Part Number: MMA02040D5620BB300
TYPE/SIZE VERSION TCR RESISTANCE TOLERANCE PACKAGING
MMU0102
MMA0204
MMB0207
0 =
EN 140401-803,
“Version A”
E = ± 15 ppm/K
D = ± 25 ppm/K
3 digit value
1 digit multiplier
Multiplier
9 = *10-1
0 = *100
1 = *101
2 = *102
3 = *103
4 = *104
B = ± 0.1 %
C = ± 0.25 %
D = ± 0.5 %
B1
B3
B0
B2
B7
M3
M8
Product Description: MMA 0204-25 0.1 % BL 562R
MMA 0204 -25 0.1 % BL 562R
TYPE SIZE TCR TOLERANCE PACKAGING RESISTANCE
MMU
MMA
MMB
0102
0204
0207
± 15 ppm/K
± 25 ppm/K
± 0.1 %
± 0.25 %
± 0.5 %
BL
B0
B1
B2
B7
M3
M8
562R = 562
MA02040D5M20BB3006
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DESCRIPTION
Production is strictly controlled and follows an extensive set
of instructions established for reproducibility. A
homogeneous film of metal alloy is deposited on a high
grade ceramic body (Al2O3) and conditioned to achieve the
desired temperature coefficient. Nickel plated steel
termination caps are firmly pressed on the metallised 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 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. Five color
code rings designate the resistance value and tolerance in
accordance with IEC 60062 (1).
The result of the determined production is verified by an
extensive testing procedure performed on 100 % of the
individual resistors. This includes full screening for the
elimination of products with a potential risk of early life
failures according to EN 140401-803, 2.1.2.2. Only
accepted products are laid directly into the blister tape in
accordance with IEC 60286-3, Type 2a (1) or bulk case in
accordance with IEC 60286-6 (1).
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). 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 processes, if applied, shall be qualified by
appropriate means to ensure the long term stability of the
whole system.
The resistors are completely lead (Pb)-free, the pure matte
tin plating provides compatibility with lead (Pb)-free and
lead containing soldering processes. Solderability is
specified for 2 years after production or requalification,
however, excellent solderability is proven after extended
storage in excess of 10 years. The permitted storage time is
20 years. The immunity of the plating against tin whisker
growth has been proven under extensive testing.
MATERIALS
Vishay acknowledges the following systems for the
regulation of hazardous substances:
• 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
of substances with very high concern (SVHC) (4) for its
supply chain
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)
• 2011/65/EU Restriction of the Use of Hazardous
Substances Directive (RoHS) with amendment
2015/863/EU
• 2012/19/EU Waste Electrical and Electronic Equipment
Directive (WEEE)
Vishay pursues the elimination of conflict minerals from its
supply chain, see the Conflict Minerals Policy at
www.vishay.com/doc?49037.
APPROVALS
The resistors are approved within the IECQ-CECC Quality
Assessment System for Electronic Components to the detail
specification 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.
Conformity is attested by the use of the CECC logo ( ) as
the mark of conformity on the package label.
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 resistors are qualified according to AEC-Q200.
RELATED PRODUCTS
For thin film products with a wider resistance, see the
datasheet:
• “Professional MELF Resistors”
(www.vishay.com/doc?28713)
For products with tighter precision specification, see the
datasheet
• “Ultra Precision MELF Resistors”
(www.vishay.com/doc?28715)
Resistors are available with established reliability in
accordance with EN 140 401-803 Version E. Please refer to
datasheet
• “MELF Resistors with Established Reliability”
(www.vishay.com/doc?28707)
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
(3) The Global Automotive Declarable Substance List (GADSL) is maintained by the American Chemistry Council and available at www.gadsl.org
(4) The SVHC list is maintained by the European Chemical Agency (ECHA) and available at http://echa.europa.eu/candidate-list-table
MMU 0102, MMA 0204, MMB 0207 - Precision
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FUNCTIONAL PERFORMANCE
C
100 150- 50 50
W
70
Power Dissipation P
Ambient Temperature ϑamb
Derating - Precision Operation Mode
0
MMA 0204
MMB 0207
MMU 0102
0.4
0
0.1
0.2
0.3
C
100 150- 50 50
W
70
Power Dissipation P
Ambient Temperature ϑamb
Derating - Standard Operation Mode
0
0.4
0
0.1
0.2
0.3
MMA 0204
MMB 0207
MMU 0102
MMB 0207
MMU 0102
MMA 0204
Pulse Load
P
W
Single Pulse
Maximum pulse load, single pulse; applicable if P 0 and n ≤ 1000 and U ≤ U
max.
;
for permissible resistance change ± (0.5 % R + 0.01 Ω)
Pulse Duration ti
1000
100
10
1
0.1
10 s1 s100 ms
10 ms
1 ms100 µs10 µs1 µs
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FUNCTIONAL PERFORMANCE
W
MMB 0207
MMU 0102
MMA 0204
Pulse Load
P
Continuous Pulse
Pulse Duration ti
1000
100
10
1
0.1
10 s1 s100 ms
10 ms
1 ms100 µs10 µs1 µs
Maximum pulse load, continuous pulse; applicable if P ≤ P (ϑ
amb
) and U ≤ U
max.
;
for permissible resistance change ± (0.5 % R + 0.01 Ω)
V
1000
Pulse Duration ti
Pulse Voltage
Maximum pulse voltage, single and continuous pulses; applicable if P ≤ Pmax.;
for permissible resistance change ± (0.5 % R + 0.01 Ω)
Pulse Voltage
U
max.
100
10 s1 s100 ms
10 ms
1 ms100 µs1 µs 10 µs
MMB 0207
MMU 0102
MMA 0204
100 V
1 kV
10 V
10 kV
Pulse Voltage
U
100 Ω1 kΩ 10 kΩ 100 kΩ1 MΩ
10 Ω10 MΩ
alue
R
Resistance V
1.2/50 Pulse
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)
MMB 0207
MMU 0102
MMA 0204
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FUNCTIONAL PERFORMANCE
100 Ω1 kΩ10 kΩ
100 V
100 kΩ 1 MΩ
1 kV
10 V
10 kV
10 Ω10 MΩ
Resistance Value R
10/700 Pulse
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)
Pulse Voltage U
MMB 0207
MMU 0102
MMA 0204
Current Noise Voltage Ratio
0.01
100 Ω
0.1
1
µV/V
Resistance Value R
Current Noise Voltage Ratio
In accordance with IEC 60195
1 kΩ10 kΩ100 kΩ1 MΩ10 MΩ
MMB 0207
MMU 0102
MMA 0204
MMU 0102, MMA 0204, MMB 0207 - Precision
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TESTS AND REQUIREMENTS
All tests are carried out in accordance with the following
specifications:
EN 60115-1, generic specification
EN 60115-8 (successor of EN 140400), sectional
specification
EN 140401-803, detail specification
IEC 60068-2-xx, test methods
The components are approved under the IECQ-CECC
quality assessment system for electronic components.
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.
The testing also covers most of the requirements specified
by EIA/ECA-703 and JIS-C-5201-1.
The tests are carried out under standard atmospheric
conditions in accordance with IEC 60068-1, 4.3, whereupon
the following values are applied:
Temperature: 15 °C to 35 °C
Relative humidity: 25 % to 75 %
Air pressure: 86 kPa to 106 kPa (860 mbar to 1060 mbar)
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
EN
60115-1
CLAUSE
IEC
60068-2 (1)
TEST
METHOD
TEST PROCEDURE REQUIREMENTS
PERMISSIBLE CHANGE (R)
Stability for product types:
STABILITY
CLASS 0.05
OR BETTER
STABILITY
CLASS 0.1
OR BETTER
STABILITY
CLASS 0.25
OR BETTER
MMU 0102 100 to 100 k43 to 147 k22 to 332 k
MMA 0204 100 to 100 k43 to 221 k10 to 511 k
MMB 0207 100 to 270 k43 to 510 k15 to 1 M
4.5 - Resistance - ± 0.5 % R; ±0.25 % R; ± 0.1 % R
4.8 - Temperature
coefficient
At (20/-55/20) °C and
(20/125/20) °C ± 25 ppm/K, ± 15 ppm/K
4.25.1 -
Endurance
at 70 °C:
Precision
operation mode
U = or U = Umax.;
whichever is the less severe;
1.5 h on; 0.5 h off;
70 °C; 1000 h ± (0.05 % R + 5 m)
70 °C; 8000 h ±(0.1 % R + 5 m)
Endurance
at 70 °C:
Standard
operation mode
U = or U = Umax.;
whichever is the less severe;
1.5 h on; 0.5 h off;
70 °C; 1000 h ±(0.1 % R + 5 m)
70 °C; 8000 h ± (0.2 % R + 5 m)
4.25.3
Endurance at
upper category
temperature
85 °C; 1000 h ±(0.02 % R + 5 m) ± (0.05 % R + 5 m)±(0.1 % R + 5 m)
125 °C; 1000 h ± (0.05 % R + 5 m)±(0.1 % R + 5 m)±(0.15 % R + 5 m)
4.24 78 (Cab) Damp heat,
steady state
(40 ± 2) °C; 56 days;
(93 ± 3) % RH ±(0.05 % R + 5 m)±(0.1 % R + 5 m)
4.37 67 (Cy)
Damp heat,
steady state,
accelerated
(85 ± 2)C;
(85 ± 5) % RH;
U = 0.3 x
100 V and
U = 0.3 x Umax.;
(the smaller value is valid)
1000 h
± (0.15 % R + 5 m)±(0.25 % R + 5 m)
P70 x R
P70 x R
P70 x R
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- 1 (Ab) Cold -55 °C; 2 h ±(0.02 % R + 5 m)
4.19 14 (Na) Rapid change
of temperature
30 min at LCT;
30 min at UCT;
LCT = -10 °C;
UCT = 85 °C
1000 cycles ± (0.1 % R + 5 m) ± (0.1 % R + 5 m)-
LCT = -55 °C;
UCT = 125 °C
1000 cycles - - ± (0.2 % R + 5 m)
4.13 -
Short time
overload:
Precision
operation mode U = 2.5 x or
U = 2 × Umax.;
whichever is the less severe;
5 s
±(0.01 % R + 5 m) ± (0.02 % R + 5 m) ± (0.03 % R + 5 m)
Short time
overload:
Standard
operation mode
± (0.05 % R + 5 m)
4.27 -
Single pulse high
voltage overload:
Standard
operation mode
Severity no. 4:
U = 10 x or
U = 2 × Umax.;
whichever is the less severe;
10 pulses 10 μs/700 μs
± (0.25 % R + 5 m)
4.39 -
Periodic electric
overload:
Standard
operation mode
U = or
U = 2 x Umax.;
whichever is the less severe;
0.1 s on; 2.5 s off;
1000 cycles
±(0.5 % R + 5 m)
4.22 6 (Fc) Vibration
Endurance by sweeping;
10 Hz to 2000 Hz;
no resonance; amplitude
1.5 mm or 200 m/s2; 7.5 h
±(0.01 % R + 5 m)±(0.02 % R + 5 m) ± (0.03 % R + 5 m)
4.38 -
Electrostatic
discharge
(Human Body
Model) (2)
IEC 61340-3-1 (1);
3 pos. + 3 neg. discharges
MMU 0102: 1.5 kV
MMA 0204: 2 kV
MMB 0207: 4 kV
±(0.5 % R + 50 m)
4.17 58 (Td) Solderability
Solder bath method;
SnPb40; non-activated flux;
(215 ± 3) °C; (3 ± 0.3) s
Good tinning ( 95 % covered); no visible damage
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
TEST PROCEDURES AND REQUIREMENTS
EN
60115-1
CLAUSE
IEC
60068-2 (1)
TEST
METHOD
TEST PROCEDURE REQUIREMENTS
PERMISSIBLE CHANGE (R)
Stability for product types:
STABILITY
CLASS 0.05
OR BETTER
STABILITY
CLASS 0.1
OR BETTER
STABILITY
CLASS 0.25
OR BETTER
MMU 0102 100 to 100 k43 to 147 k22 to 332 k
MMA 0204 100 to 100 k43 to 221 k10 to 511 k
MMB 0207 100 to 270 k43 to 510 k15 to 1 M
P70 x R
P70 x R
15 x P70 x R
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Notes
(1) The quoted IEC standards are also released as EN standards with the same number and identical contents
(2) The pulse load stability of professional MELF resistors applies for precision resistors also. However, severe pulse loads are likely to
jeopardize precision stability requirements
(3) Special requirements apply to MICRO-MELF, MMU 0102:
• R < 100 ± (0.25 % R + 10 m)
• 100 R 221 k ± 0.1 % R
• 221 k < R: ± 0.25 % R
4.18 58 (Td) Resistance to
soldering heat
Solder bath method;
(260 ± 5) °C; (10 ± 1) s ±(0.05 % R + 10 m)
Reflow method 2
(IR/forced gas convection);
(260 ± 5) °C; (10 ± 1) s
±(0.01 % R + 5 m)±(0.025 % R + 5 m)
4.29 45 (XA)
Component
solvent
resistance
Isopropyl alcohol; 50 °C;
method 2 No visible damage
4.30 45 (XA)
Solvent
resistance of
marking
Isopropyl alcohol; 50 °C;
method 1, toothbrush Marking legible; no visible damage
4.32 21 (Ue3) Shear (adhesion) 45 N No visible damage
4.33 21 (Ue1)Substrate
bending Depth 2 mm, 3 times No visible damage, no open circuit in bent position
± (0.02 % R + 10 m) (3)
±
(0.05 % R + 10 m
)
(3)
4.7 - Voltage proof URMS = Uins; 60 s No flashover or breakdown
4.35 - Flammability IEC 60695-11-5 (1),
needle flame test; 10 s No burning after 30 s
TEST PROCEDURES AND REQUIREMENTS
EN
60115-1
CLAUSE
IEC
60068-2 (1)
TEST
METHOD
TEST PROCEDURE REQUIREMENTS
PERMISSIBLE CHANGE (R)
Stability for product types:
STABILITY
CLASS 0.05
OR BETTER
STABILITY
CLASS 0.1
OR BETTER
STABILITY
CLASS 0.25
OR BETTER
MMU 0102 100 to 100 k43 to 147 k22 to 332 k
MMA 0204 100 to 100 k43 to 221 k10 to 511 k
MMB 0207 100 to 270 k43 to 510 k15 to 1 M
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DIMENSIONS
Note
• Color code marking is applied according to IEC 60062 (1) in five bands (E96 or E192 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 band between the 4th and 5th full band indicates the temperature coefficient (yellow = TC25,
orange = TC15)
PATTERN STYLES FOR MELF RESISTORS
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
DIMENSIONS AND MASS
TYPE/SIZE L
(mm)
D
(mm)
L1 min.
(mm)
D1
(mm)
K
(mm)
MASS
(mg)
MMU 0102 2.2 + 0/- 0.1 1.1 + 0/- 0.1 1.2 D + 0/- 0.1 0.4 ± 0.05 8
MMA 0204 3.6 + 0/- 0.2 1.4 + 0/- 0.1 1.8 D + 0/- 0.15 0.75 ± 0.1 22
MMB 0207 5.8 + 0/- 0.15 2.2 + 0/- 0.2 3.2 D + 0/- 0.2 1.1 ± 0.1 80
RECOMMENDED SOLDER PAD DIMENSIONS
TYPE/SIZE
WAVE SOLDERING REFLOW SOLDERING
G
(mm)
Y
(mm)
X
(mm)
Z
(mm)
G
(mm)
Y
(mm)
X
(mm)
Z
(mm)
MMU 0102 0.7 1.2 1.5 3.1 1.1 0.8 1.3 2.7
MMA 0204 1.5 1.5 1.8 4.5 1.7 1.2 1.6 4.1
MMB 0207 2.8 2.1 2.6 7.0 3.2 1.7 2.4 6.6
L
1
K
D
1
D
L
GX
Y
Z
MMU 0102, MMA 0204, MMB 0207 - Precision
www.vishay.com Vishay Beyschlag
Revision: 16-Sep-16 12 Document Number: 28714
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
HISTORICAL 12NC INFORMATION
• The resistors had a 12-digit numeric code starting with
2312.
• The subsequent 4 digits indicated the resistor type,
specification and packaging; see the 12NC table.
• The remaining 4 digits indicated the resistance value:
- The first 3 digits indicated the resistance value.
- The last digit indicated the resistance decade in
accordance with the 12NC Indicating Resistance
Decade table.
Last Digit of 12NC Indicating Resistance Decade
Historical 12NC
The 12NC of a MMU 0102 resistor, value 47 k. and TCR 25
with ± 0.25 % tolerance, supplied in blister tape of 3000
units per reel is: 2312 166 64703.
RESISTANCE DECADE LAST DIGIT
10 to 99.9 9
100 to 999 1
1 k to 9.99 k2
10 k to 99.9 k3
100 k to 999 k4
1 M to 9.99 M5
HISTORICAL 12NC - Resistor type and packaging
DESCRIPTION 2312 ... .....
BLISTER TAPE ON REEL BULK CASE
TYPE TCR TOL.
B1
1000
UNITS
BL
3000
UNITS
B0
10 000
UNITS
M8
8000
UNITS
MMU 0102
± 25 ppm/K ± 0.25 % 171 6.... 166 6.... 176 6.... 061 6....
± 0.1 % 171 7.... 166 7.... 176 7.... 061 7....
± 15 ppm/K
± 0.5 % 172 5.... 167 5.... 177 5.... 062 5....
± 0.25 % 172 6.... 167 6.... 177 6.... 062 6....
± 0.1 % 172 7.... 167 7.... 177 7.... 062 7....
TYPE TCR TOL.
B1
1000
UNITS
BL
3000
UNITS
B0
10 000
UNITS
M3
3000
UNITS
MMA 0204
± 25 ppm/K ± 0.25 % 141 6.... 156 6.... 146 6.... 041 6....
± 0.1 % 141 7.... 156 7.... 146 7.... 041 7....
± 15 ppm/K
± 0.5 % 142 5.... 157 5.... 147 5.... 042 5....
± 0.25 % 142 6.... 157 6.... 147 6.... 042 6....
± 0.1 % 142 7.... 157 7.... 147 7.... 042 7....
TYPE TCR TOL.
B1
1000
UNITS
B2
2000
UNITS
B7
7000
UNITS
MMB 0207 ± 25 ppm/K ± 0.25 % 181 6.... 196 6.... 186 6....
± 0.1 % 181 7.... 196 7.... 186 7....
± 15 ppm/K ± 0.1 % 182 7.... 197 7.... 187 7....
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Revision: 08-Feb-17 1Document Number: 91000
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