Models # 303139 and 303140 - Molded Surface Mount Space and Military
Grade Resistors SMRxDZ with Screen/Test Flow in Compliance with
EEE-INST-002, (Tables 2A and 3A, Film/Foil, Level 1) and MIL-PRF-55182
303139, 303140
Vishay Foil Resistors
Document Number: 63165 For any questions, contact: foil@vishaypg.com www.foilresistors.com
Revision: 27-Jul-10 1
INTRODUCTION
The 303139, 303140 are ultra high precision molded surface
mountable resistors offering all the elements of precision;
including low TCR, tight tolerance, long term stability, low
noise, low thermal EMF, and non-measurable voltage
coefficient. One of the important parameters influencing
stability is the temperature coefficient of resistance (TCR).
Although the TCR of foil resistors is considered extremely
low, this characteristic has been further refined over the
years. These resistors utilize ultra high precision Bulk Metal®
Z-Foil.
The Z-Foil technology provides a significant reduction of
the resistive element’s sensitivity to ambient temperature
variations (TCR) and to self heating when power is applied
(power coefficient).
Voltage division with tight tracking < 2 ppm/°C can be
achieved with 2 randomly selected units even with a large
ratio between the two values.
Our application engineering department is available to
advise and make recommendations.
FEATURES
•Temperature coefficient of resistance (TCR):
± 0.2 ppm°C typical (- 55 °C to + 125 °C, + 25 °C ref.)
•Tolerance: to ± 0.02 %
•Power coefficient of resistance (PCR)
“ΔR due to self heating”: 5 ppm at rated power
•Flexible terminations ensure minimal stress transference
from the PCB due to a difference in thermal coefficient of
expansions (TCE)
•Electrostatic discharge (ESD) up to 25 000 V
•Load life stability: ± 0.005 % (70 °C, 2000 h at rated power)
•Resistance range: 5 Ω to 40 kΩ
•Vishay Foil resistors are not restricted to standard values;
specific “as requested” values can be supplied at no extra
cost or delivery (e.g. 1K2345 vs. 1K)
•Maximum power: to 600 mW at 70 °C
•Non-inductive, non-capacitive design
•Current noise: - 40 dB
•Voltage coefficient: < 0.1 ppm/V
•Non-inductive: < 0.08 µH typical
•Non hot spot design
•Terminal finish: tin/lead alloy
•Matched sets with TCR tracking are available upon
request
•For oriented performances please contact us
•
For prototype units, append a “U” to the model number
(example: 303139U). These units pass all tests per table 3
(page 4) with no destructive qualification testing required
(table 4, page 4). For more information, please contact
foil@vishaypg.com
TABLE 1 - TOLERANCE AND TCR VS.
RESISTANCE VALUE
(- 55 °C to + 125 °C, + 25 °C ref.)
VALUE ABSOLUTE
TOLERANCE
TYPICAL TCR AND
MAX. SPREAD
(ppm/°C)
250 Ω to 40 kΩ± 0.02 % ± 0.2 ± 1.8
50 Ω to < 250 Ω± 0.05 % ± 0.2 ± 1.8
20 Ω to < 50 Ω± 0.1 % ± 0.2 ± 2.8
10 Ω to < 20 Ω± 0.2 % ± 0.2 ± 4.8
5 Ω to < 10 Ω± 0.5 % ± 0.2 ± 6.8
FIGURE 1 - POWER DERATING CURVE
200
175
150
125
100
75
50
25
0
- 75 - 25 + 25 + 75 + 125 + 175
Ambient Temperature (°C)
Rated Power (%)
- 55 °C + 70 °C
303139, 303140
Vishay Foil Resistors
www.foilresistors.com For any questions, contact: foil@vishaypg.com Document Number: 63165
2Revision: 27-Jul-10
Note
(1) As shown + 0.01 Ω to allow for measurement error at low values
TABLE 2 - PERFORMANCE SPECIFICATIONS
TEST CONDITIONS MAXIMUM LIMIT (1)
303139 303140 303139 303140
Resistance Range 5 Ω to 14 kΩ5 Ω to 40 kΩ
Power Rating
5 Ω to 10 kΩ
0.250 W at 70 °C
0.125 W at 125 °C
10 kΩ to 14 kΩ
0.160 W at 70 °C
0.08 W at 125 °C
5 Ω to 30 kΩ
0.6 W at 70 °C
0.3 W at 125 °C
30 kΩ to 40 kΩ
0.4 W at 70 °C
0.2 W at 125 °C
See figure 1
Maximum Working Voltage 47 V 127 V
Maximum Operating
Temperature + 175 °C (see figure 1)
Working Temperature Range - 55 °C to + 125 °C (MIL range)
Thermal Shock - 65 °C to + 150 °C; 25 cycles
0.02 % for values higher
than 100 Ω
0.03 % for values between
5 Ω to 100 Ω
Short Time Overload 6.25 x rated power (at + 125 °C); 5 s,
not to exceed 70.5 V for 303139, 190 V for 303140 ± 0.01 % (100 ppm)
Low Temperature Operation - 65 °C, 24 h (no load): 45 min at rated power ± 0.01 % (100 ppm)
Dielectric Withstanding
Voltage Atmospheric pressure; AC 200 V; 1 min ± 0.01 % (100 ppm)
Insulation Resistance (MΩ)DC 100 V; 1 min over 10 000 MΩ
Resistance to
Soldering Heat (%) 260 °C; 10 s ± 0.03 %
Moisture Resistance + 65 °C to - 10 °C; 90 % to 98 % RH; rated power; 240 h ± 0.02 % (200 ppm)
Shock 100 G; sawtooth; axes Y, Z; 10 shocks per each axis ± 0.01 % (100 ppm)
Vibration, High Frequency 10 Hz ~ 2000 Hz ~ 10 Hz; 20 G; axes Y, Z; 4 h in each axis ± 0.01 % (100 ppm)
Load Life Stability (2000 h) 125 °C, rated power ± 0.05 % (500 ppm)
High Temperature Exposure 175 °C; no load 2000 h ± 0.1 % (1000 ppm)
Weight 0.1143 g 0.244 g
Packaging Bulk (loose) or tape and reel, per EIA-481-1
303139, 303140
Vishay Foil Resistors
Document Number: 63165 For any questions, contact: foil@vishaypg.com www.foilresistors.com
Revision: 27-Jul-10 3
Notes
• For more details, see table 1
• The TCR values for < 80 Ω are influenced by the termination
composition and the result in deviation from this curve
FIGURE 2 - DIMENSIONS in inches (millimeters)
MODEL L W H P TW TH (minimum)
303139 0.236 ± 0.012
(5.99 ± 0.30)
0.126 ± 0.012
(3.20 ± 0.30)
0.098 ± 0.012
(2.49 ± 0.30)
0.051 ± 0.012
(1.30 ± 0.30)
0.087 ± 0.004
(2.21 ± 0.10)
0.039
(0.99)
303140 0.287 ± 0.012
(7.29 ± 0.30)
0.170 ± 0.012
(4.32 ± 0.30)
0.110 ± 0.012
(2.79 ± 0.30)
0.051 ± 0.012
(1.30 ± 0.30)
0.095 ± 0.004
(2.41 ± 0.10)
0.039
(0.99)
TH Minimum
Side View
Stand Off
W
Bottom View
L
PP
End View
H
TW
Top View
100R0T
(DATE CODE)
V
z
TOLERANCE
Z-FOIL
INDICATOR
VALUE (5 DIGITS)
FIGURE 3 - RECOMMENDED MOUNTING PAD GEOMETRIES in inches (millimeters)
MODEL METHOD A
MIN.
B
REF
C
REF
D
± 0.04 (± 1.02)
E
REF
303139 Reflow 0.110
(2.79)
0.106
(2.69)
0.124
(3.15)
0.337
(8.55)
0.050
(1.27)
303140 Reflow 0.118
(3.00)
0.106
(2.69)
0.175
(4.45)
0.388
(9.86)
0.050
(1.27)
Per IPC-SM-782 Rev A
E
A
CB
D
Reflow Solder Pads
FIGURE 4 - TRIMMING TO VALUES
(Conceptual Illustration)
Note: Foil shown in black, etched spaces in white
Mutual
Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
Current Path
Before Trimming
Interloop
Capacitance
Reduction
in Series
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing Resistance
Current Path
After Trimming
FIGURE 5 - TYPICAL RESISTANCE/
TEMPERATURE CURVE (Z-FOIL)
+ 500
+ 200
+ 100
0
- 100
- 200
- 300
- 500
- 55 - 25 + 25 + 60 + 75 + 100 + 125
Ambient Temperature (°C)
ΔR
R
(ppm)
0
0.05 ppm/°C
- 0.1 ppm/°C 0.1 ppm/°C
0.14 ppm/°C
0.2 ppm/°C
- 0.16 ppm/°C
- 400
+ 300
+ 400
TCR Chord Slopes for Different Temperature Ranges
303139, 303140
Vishay Foil Resistors
www.foilresistors.com For any questions, contact: foil@vishaypg.com Document Number: 63165
4Revision: 27-Jul-10
NOTES
•For prototype units, append a “U” to the model number (example: 303139U). These units have all of the table 2A 100 % tests
performed, with no destructive qualification testing required.
•Measurement error allowed for ΔR limits: 0.01 Ω.
TABLE 3 - EEE-INST-002 (TABLE 2A FILM/FOIL, LEVEL 1) 100 % TESTS/INSPECTIONS
Pre-cap Visual Inspection Performed in production flow on welded chip on strip
RC Record In tolerance
Thermal Shock 25 x (- 65 °C to + 150 °C)
Short Time Overload 6.25 x rated power (at + 125 °C), 5 s, not to exceed 70.5 V for 303139, 190 V for 303140
RC Record In tolerance, ΔR = 0.02 % for values higher than 100 Ω, ΔR = 0.03 % for values between 5 Ω to 100 Ω
Power Conditioning Rated power, 100 h, + 125 °C
Component Linearity Test
RC Record In tolerance ΔR ≤ 200 ppm for R > 100 Ω, ΔR ≤ 500 ppm for R ≤ 100 Ω
Final Inspection PDA 3 % on ΔR > 0.05 % only
Visual Inspection Materials, design, marking, etc.
Mechanical Inspection Physical dimensions sample size: 3 units. For a min. of one failure - 100 % inspection
TABLE 4 - EEE-INST-002 (TABLE 3A FILM/FOIL, LEVEL 1) DESTRUCTIVE TESTS
Group 2
Sample size: 3(0)
Solderability MIL-STD-202, method 208
Resistance to solvents MIL-STD-202, method 215
Group 3
Sample size: 10(0)
Thermal shock 25 x (- 65 °C to + 150 °C)
MIL-STD-202, method 107 ΔR = 0.02 % for values higher than 100 Ω
ΔR = 0.03 % for values between 5 Ω to 100 Ω
303139, 303140
Values TCR limits
100 Ω to 40 kΩ± 2 ppm/°C
20 Ω to < 100 Ω± 3 ppm/°C
10 Ω to < 20 Ω± 5 ppm/°C
5 Ω to < 10 Ω± 7 ppm/°C
TCR - mounted on FR4 Temperature range: - 55 °C/+ 25 °C/+ 125 °C
Low temperature storage - 65 °C no load dwell for 24 h ± 4 h
+ 25 °C ambient no load dwell for 2 h to 8 h
Low temperature operation
ΔR = 0.01 %
- 65 °C no load dwell for 1 h
rated power (at + 125 °C) for 45 min
+ 25 °C ambient no load dwell for 24 h ± 4 h
Short time overload
ΔR = 0.01 %
6.25 x rated power (at + 125 °C), not to exceed 70.5 V for 303139, 190 V for 303140
303139, 303140
Vishay Foil Resistors
Document Number: 63165 For any questions, contact: foil@vishaypg.com www.foilresistors.com
Revision: 27-Jul-10 5
Note
• The sample units of table 4 should be randomly selected from lots which successfully passed the table 3 tests
Group 4
Sample size: 9(0)
DWV ΔR = 0.01 %
MIL-STD-202, method 301 Atmospheric pressure, 200 VAC, 1 min
Insulation resistance 100 VDC
MIL-STD-202, method 302 IR ≥ 104 MΩ
Resistance to soldering
heat - mounted on FR4 ΔR = 0.03 %
MIL-STD-202, method 210
condition B 260 °C, 10 s
Moisture resistance ΔR = 0.02 %
MIL-STD-202, method 106
DWV, at 200 VAC, 1 min
atmospheric pressure ΔR = 0.01 %
Insulation resistance,
at 100 VDC IR ≥ 100 MΩ
Group 5
Sample size: 9(0) - mounted on FR4
Shock ΔR = 0.01 %
MIL-PRF-55182 and MIL-STD-202, method 213, condition I
10 shocks in each of two mutually perpendicular planes (Y, Z) 100 G, 6 ms, sawtooth
Vibration ΔR = 0.01 %
MIL-PRF-55182 and MIL-STD-202, method 204, condition D
10 Hz - 2000 Hz - 10 Hz, 20 G, planes Y, Z
In each of two mutually perpendicular planes (Y, Z), 20 G, 4 h in each plane
Group 6
Sample size: 12(0) - mounted on FR4
Life ΔR = 0.05 %
MIL-STD-202, method 108
1.5 h on, 0.5 h off, 125 °C, rated power (at + 125 °C), 2000 h
Group 8
Sample Size: 5(0) - not mounted
Voltage coefficient 5 ppm/V
MIL-PRF-55182 and
MIL-STD-202, method 309
Working voltage
Resistance range > 1 K
Group 9
Sample size: 5(0)
High temperature exposure ΔR = 0.1 %
+ 175 °C, 2000 h, no load
Group
10 Thermal outgassing Contact Vishay application engineering for review
TABLE 4 - EEE-INST-002 (TABLE 3A FILM/FOIL, LEVEL 1) DESTRUCTIVE TESTS
303139, 303140
Vishay Foil Resistors
www.foilresistors.com For any questions, contact: foil@vishaypg.com Document Number: 63165
6Revision: 27-Jul-10
PART NUMBER IDENTIFICATION
Model # 303139 303140
Base Model SMR1DZ SMR3DZ
Value Range (Space Applications) 5 Ω to 14 kΩ5 Ω to 40 kΩ
Part Number:
{Model} - {Value} - {Tolerance} - {Termination} - {Packaging}
Absolute Tolerance Code Termination Code Packaging Code
0.02 % QTin/lead BBulk L
0.05 % ATape and reel T
0.1 % B
0.2 % E
0.5 % D
Example: 303139 - 8K0225 - QBT
303139, 8.0225 kΩ, 0.02 %, tin/lead termination, tape and reel packaging
Vishay Precision Group
Document No.: 63999
Revision: 27-Apr-11
www.vishaypg.com
1
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