303143, 303143L (Z-Foil)
Vishay Foil Resistors
Models 303143 and 303143L (Ultra High Precision Fixed
Resistor Z-Foil Z201), Screen/Test Flow as modified
from S-311-P813 Proposed by NASA
FEATURES
Temperature coefficient of resistance (TCR):
± 0.05 ppm/°C typical (0 °C to + 60 °C)
± 0.2 ppm/°C typical (- 55 °C to + 125 °C, + 25 °C ref.)
Power coefficient of resistance “R due to self heating”:
± 5 ppm at rated power
Rated power: 0.6 W at 70 °C
0.3 W at 125 °C
Resistance tolerance: to ± 0.005 %
Load life stability: to ± 0.005 % at 70 °C, 2000 h at rated
power
INTRODUCTION
The 303143 (0.150" lead spacing) and 303143L (0.200"
lead spacing) Bulk Metal
®
Z-Foil resistors represent the 3
rd
in a series of ultra-precision resistors since the first Bulk
Metal Foil resistor was introduced by Vishay in 1962. Each
represents an improvement on the earlier model. The TCR
slope of the 303143 and 303143L is 0.2 ppm/C (- 55 °C to
+ 125 °C, + 25 °C ref.) and is an order of magnitude better
than the original S102C. The Bulk Metal Z-Foil resistor is the
ultimate choice in the most demanding analog applications.
The Z-Foil technology provides a significant reduction of the
resistive component’s sensitivity to ambient temperature
variations (TCR) and applied power changes (PCR).
Designers can now guarantee a high degree of stability and
accuracy in fixed-resistor applications using solutions based
on Vishay’s revolutionary Z-Foil technology.
Our application engineering department is available to
advise and to make recommendations.
Resistance range: 10
to 100 k
Electrostatic discharge (ESD) up to 25 000 V
Non-inductive, non-capacitive design
Rise time: 1.0 ns effectively no ringing
Current noise: 0.010 µV
RMS
/V of applied voltage (< - 40 dB)
Thermal EMF: 0.1 µV/°C max.
0.05 µV/°C typical
Voltage coefficient: < 0.1 ppm/V
Non-inductive: 0.08 µH
Terminal finish: tin/lead alloy
Maximum working voltage: 245 V
Drop in replacement for S102C/K
Matched sets are available per request
For prototype units, append a “U” to the model number
(example: 303143U). These units include only the 100 %
screening requirements (table 4, page 4). For more
information, please contact
foil@vishaypg.com
FIGURE 1 - POWER DERATING CURVE
Percent of Rated Power at + 125 °C
200 %
175 %
150 %
125 %
100 %
75 %
50 %
25 %
0
- 75 - 50 - 25
- 55 °C
+ 70 °C
TABLE 1 - TOLERANCE AND TCR VS.
RESISTANCE
VALUE
100
to 100 k
80
to < 100
50
to < 80
25
to < 50
10
to < 25
TIGHTEST
ABSOLUTE
TOLERANCES
± 0.005 %
± 0.005 %
± 0.005 %
± 0.01 %
± 0.05 %
TYPICAL TCR AND
MAXIMUM SPREAD
- 55 °C TO + 125 °C
(+ 25 °C ref.)
± 0.2 ± 0.6 ppm/°C
± 0.2 ± 0.8 ppm/°C
± 0.2 ± 1.0 ppm/°C
± 0.2 ± 1.3 ppm/°C
± 0.2 ± 1.6 ppm/°C
Double Rated Power
Rated Power
Safe Operation
for < 150 ppm
ΔR
after
2000 h
Load Life
0
+ 25 + 50 + 75 + 100 + 125 + 150 + 175 + 200
Ambient Temperature (°C)
Document Number: 63174
Revision: 29-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
1
303143, 303143L (Z-Foil)
Vishay Foil Resistors
FIGURE 2 - TRIMMING TO VALUES
(conceptual illustration)
FIGURE 3 - TYPICAL RESISTANCE/
TEMPERATURE CURVE
+ 500
+ 400
Interloop
Capacitance
Reduction
in Series
Mutual
Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing Resistance
+ 300
+ 200
+ 100
ΔR
0
R
(ppm)
- 100
- 200
- 300
- 400
- 500
- 55
- 25
0
+ 25
+ 60 + 75
+ 100 + 125
- 0.16 ppm/°C
0.05 ppm/°C
- 0.1 ppm/°C
0.1 ppm/°C
0.14 ppm/°C
0.2 ppm/°C
Note:
Foil shown in
black,
etched spaces in
white
Ambient Temperature (°C)
FIGURE 4 - STANDARD IMPRINTING AND DIMENSIONS
Front View
L
VISHAY
XXXX
303143
Date Code
07
16
Year Week
ST *
SW
Model No.
LS
Lead Material #22 AWG
Round Solder Coated Copper
LL
W
Rear View
Optional Customer Part Number
Print Specification, etc. if required
H
XXXXXX
100R01
0.005%
Resistance
Value Code
Tolerance
* The standoffs shall be so located as to give a lead clearance of 0.010" minimum between the resistor body and the printed circuit board
when the standoffs are seated on the printed circuit board. This is to allow for proper cleaning of flux and other contaminants from the unit
after all soldering processes.
LS
303143
303143L
Inches
mm
Inches
mm
0.150 ± 0.005
3.81 ± 0.13
0.200 ± 0.005
5.08 ± 0.13
0.105 ± 0.010
2.67 ± 0.25
0.300 ± 0.010
7.62 ± 0.25
0.326 ± 0.010
8.28 ± 0.25
0.010 min
0.254 min
0.035 ± 0.01
1.02 ± 0.13
1.000 ± 0.125
25.4 ± 3.18
W
L
H
ST
SW
LL
TABLE 2 - SPECIFICATIONS
Stability
± 0.005 % max.
R
at 0.1 W/+ 70 °C
Load Life at 2000 h
± 0.015 % max.
R
at 0.3 W/+ 125 °C
± 0.01 % max.
R
at 0.05 W/+ 125 °C
Load Life at 10 000 h
± 0.05 % max.
R
at 0.3 W/+ 125 °C
www.foilresistors.com
2
For any questions, contact:
foil@vishaypg.com
Document Number: 63174
Revision: 29-Mar-10
303143, 303143L (Z-Foil)
Vishay Foil Resistors
TABLE 3 - ENVIRONMENTAL PERFORMANCE COMPARISON
MIL-PRF-55182
CHAR J
Test Group I
Thermal Shock
Short Time Overload
Test Group II
Resistance Temperature
Characteristic
Low Temperature Storage
Low Temperature Operation
Terminal Strength
Test Group III
DWV
Resistance to Solder Heat
Moisture Resistance
Test Group IV
Shock
Vibration
Test Group V
Life Test at 0.3 W/+ 125 °C
2000 h
10 000 h
Test Group Va
Life Test at 0.6 W (2 x Rated Power)/+ 70 °C, 2000 h
Test Group VI
High Temperature Exposure
Test Group VII
Voltage Coefficient
VISHAY 303143, 303143L
MAXIMUM
R
TYPICAL
R
± 0.2 %
± 0.2 %
± 0.01 % (100 ppm)
± 0.03 % (300 ppm)
± 0.002 % (20 ppm)
± 0.003 % (30 ppm)
± 25 ppm/°C
± 0.15 %
± 0.15 %
± 0.2 %
see table 1
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.05 ppm/°C
(0 °C to + 60 °C)
± 0.002 % (20 ppm)
± 0.002 % (20 ppm)
± 0.002 % (20 ppm)
± 0.15 %
± 0.1 %
± 0.4 %
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.02 % (200 ppm)
± 0.002 % (20 ppm)
± 0.005 % (50 ppm)
± 0.01 % (100 ppm)
± 0.2 %
± 0.2 %
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.002 % (20 ppm)
± 0.002 % (20 ppm)
± 0.5 %
± 2.0 %
± 0.015 % (150 ppm)
± 0.05 % (500 ppm)
± 0.01 % (100 ppm)
± 0.03 % (300 ppm)
± 0.5 %
± 0.015 % (150 ppm)
± 0.01 % (100 ppm)
± 2.0 %
± 0.05 % (500 ppm)
± 0.02 % (200 ppm)
0.005 %/V
< 0.00001 %/V
< 0.00001 %/V
STANDARD MEASUREMENT
(at room temperature)
Standard Test Conditions:
Temperature: + 23 °C ± 2 °C
Relative humidity: 35 % RH to 65 % RH
Lead test point: 0.5" (12.7 mm) from resistor body
NOTES
For unqualified pre-flight or prototype units, use models # 303143U, 303143LU which include only the 100 % screening
requirements
Measurement error allowed for
R
limits: 0.01
Document Number: 63174
Revision: 29-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
3
303143, 303143L (Z-Foil)
Vishay Foil Resistors
TABLE 4 - SCREENING AND ENVIRONMENTAL TESTS
Group A
100 %
RC record - in tolerance
Thermal shock (MIL-STD-202 method 107 condition F-1) 25 x, - 65 °C, + 150 °C
Overload (+ 25 °C, 6.25 x rated power, 5 s)
RC record - in tolerance,
R
= 0.03 %
Power conditioning (+ 125 °C, 0.3 W, 100 h, not to exceed 245 V)
RC record - in tolerance,
R
= 0.05 %
Visual inspection
Final inspection - PDA - 5 % on
R
= 0.05 %
6 pieces, any value, electrical rejects allowed
Solderability
3 pieces, any value, non destructive
Subgroup 3
Mechanical/dimensional evaluation
Final Group A inspection
Group B
13 pieces or 100 %, any value, zero rejects allowed
TCR (MIL-STD-202 method 304 with the following exceptions)
- must maintain temperature for 30 min to 45 min before measurement
- first test temperatures, + 25 °C, - 15 °C, - 55 °C
- second test temperatures, + 25 °C, + 65 °C, + 125 °C
- + 25 °C to be used as reference reading
8 pieces, any value, zero rejects allowed
Resistance to solvents
Group C
Group A and B testing required
12 pieces (6 of the highest value, 6 of the lowest value), 0 rejects
Subgroup 1
Life - (+ 125 °C, 0.3 W, not to exceed max. voltage 245 V, 10 000 h)
RC record at 250 h, 500 h, 1000 h, 2000 h, 4000 h, 6000 h, 8000 h, and 10 000 h
Maximum
R
- 0.015 % for 2000 h, 0.05 % for 10 000 h
10 pieces (5 high, 5 low), 1 reject allowed
Resistance to soldering heat (conditions A and C), max.
R
= 0.01 %
Moisture resistance, max.
R
= 0.02 %
DWV (300 V
RMS
, 100 V/s, 1 min,
R
= 0.01 %
Insulation resistance (500 V
DC
, 2 min, 100 M)
12 pieces (6 high, 6 low), 1 reject allowed
Dielectric withstanding voltage (DWV) (MIL-STD-202 method 301)
- 300 V
RMS
, 100 V/s, 1 min (with special fixture requirements)
RC record -
R
= 0.01 %
Insulation resistance (MIL-STD-202 method 302)
- same fixture requirements as DWV
- 500 V
DC
, 2 min
- 10 000 M min.
Low temperature storage (LTS) (- 65 °C , 24 h, 0 W)
Low temperature operation (LTO) (- 65 °C, 45 min, rated V, not to exceed P)
RC record -
R
= 0.01 % for both LTS and LTO
Terminal strength (MIL-STD-202 method 211)
Pull test (condition A, 2 lbf, 5 s to 10 s)
Twist test (condition D)
RC record -
R
= 0.01 %
For any questions, contact:
foil@vishaypg.com
Document Number: 63174
Revision: 29-Mar-10
Subgroup 1
Subgroup 2
Subgroup 1
Subgroup 2
Subgroup 2
Subgroup 3
www.foilresistors.com
4
303143, 303143L (Z-Foil)
Vishay Foil Resistors
TABLE 4 - SCREENING AND ENVIRONMENTAL TESTS
9 pieces (any value), 0 rejects
Subgroup 4
Shock (method 213, condition I - 100G, 6 ms, sawtooth),
R
= 0.01 %
Vibration (method 204, condition D, 10 Hz to 2 kHz, 20G),
R
= 0.01 %
5 pieces (any value), 0 rejects
High temperature exposure (2000 h, + 175 °C, 0 W)
RC record -
R
= 0.05 %
Subgroup 5
TABLE 5 - QUALIFICATION (10R TO 100K)
(when required)
Group 1
Group 2
Group A
Group B
10 pieces (equally divided between highest and lowest values), 1 reject
TCR (per group B conditions)
Low temperature storage (LTS)
Low temperature operation (LTO)
Group 3
RC record -
R
= 0.01 % for LTS and LTO
Terminal strength (per group C conditions)
Pull test (condition A, 2 lbs, 5 s to 10 s)
Twist test (condition D)
RC record -
R
= 0.01 %
12 pieces (equally divided between highest and lowest values), 1 reject
Dielectric withstanding voltage (DWV) (MIL-STD-202 method 301)
- 300 V
RMS
, 100 V/s, 1 min
RC record -
R
= 0.01 %
Insulation resistance (MIL-STD-202 method 302)
Group 4
- 10 000 M min.
- 500 V
DC
, 2 min
Resistance to soldering heat (R = 0.01 %)
Moisture resistance (R = 0.05 %)
DWV (300 V, 1 min,
R
= 0.01 %)
Insulation resistance (500 V
DC
, 2 min, 100 M)
10 pieces (equally divided between highest and lowest values), 1 reject
Group 5
Shock - (100G, 6 ms, sawtooth condition I),
R
= 0.01 %
Vibration - (10 Hz to 2 kHz, condition D),
R
= 0.01 %
10 pieces (equally divided between highest and lowest values), 1 reject
Group 6
Solderability
Resistance to solvents
10 pieces (equally divided between highest and lowest values), 1 reject
Group 7
High temperature exposure (2000 h, + 175 °C, 0 W),
R
= 0.05 %
50 pieces (equally divided between highest and lowest values), 0 reject
Group 8
Life - (+ 125 °C, 0.3 W, not to exceed max. voltage 245 V, 10 000 h)
RC record at 250 h, 500 h, 1000 h, 2000 h, 4000 h, 6000 h, 8000 h, and 10 000 h
Maximum
R
- 0.015 % for 2000 h, 0.05 % for 10 000 h
30 pieces (high/low)
Group 9
Thermal shock - 100 cycles, - 65 °C to + 150 °C,
R
= 0.035 %
10 pieces (highest value only)
Group 10
Voltage coefficient (R = 1 ppm/V)
Document Number: 63174
Revision: 29-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
5
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