303143L-28R00-FBL - Vishay Presicion Group

Models 303143 and 303143L (Ultra High Precision Fixed

Resistor Z-Foil Z201), Screen/Test Flow as modified

from S-311-P813 Proposed by NASA

303143, 303143L (Z-Foil)

Vishay Foil Resistors

Document Number: 63174 For any questions, contact: foil@vishaypg.com www.foilresistors.com

Revision: 29-Mar-10 1

INTRODUCTION

The 303143 (0.150" lead spacing) and 303143L (0.200"

lead spacing) Bulk Metal® Z-Foil resistors represent the 3rd

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.

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

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 µVRMS/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

TABLE 1 - TOLERANCE AND TCR VS.

RESISTANCE

VALUE

TIGHTEST

ABSOLUTE

TOLERANCES

TYPICAL TCR AND

MAXIMUM SPREAD

- 55 °C TO + 125 °C

(+ 25 °C ref.)

100  to 100 k± 0.005 % ± 0.2 ± 0.6 ppm/°C

80  to < 100 ± 0.005 % ± 0.2 ± 0.8 ppm/°C

50  to < 80 ± 0.005 % ± 0.2 ± 1.0 ppm/°C

25  to < 50 ± 0.01 % ± 0.2 ± 1.3 ppm/°C

10  to < 25 ± 0.05 % ± 0.2 ± 1.6 ppm/°C

FIGURE 1 - POWER DERATING CURVE

200 %

175 %

150 %

125 %

100 %

75 %

50 %

25 %

0- 75 - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 + 150 + 175 + 200

Ambient Temperature (°C)

Percent of Rated Power at + 125 °C

- 55 °C + 70 °C

Double Rated Power

Rated Power

Safe Operation

for < 150 ppm

ΔR after

2000 h

Load Life

303143, 303143L (Z-Foil)

Vishay Foil Resistors

www.foilresistors.com For any questions, contact: foil@vishaypg.com Document Number: 63174

2Revision: 29-Mar-10

FIGURE 2 - 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 3 - TYPICAL RESISTANCE/

TEMPERATURE CURVE

+ 500

+ 200

+ 100

- 100

- 200

- 300

- 500

- 55 - 25 + 25 + 60 + 75 + 100 + 125

Ambient Temperature (°C)

ΔR

(ppm)

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

FIGURE 4 - STANDARD IMPRINTING AND DIMENSIONS

* 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 W L H ST SW LL

303143 Inches 0.150 ± 0.005

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

mm 3.81 ± 0.13

303143L Inches 0.200 ± 0.005

mm 5.08 ± 0.13

TABLE 2 - SPECIFICATIONS

Stability

Load Life at 2000 h

± 0.005 % max. R at 0.1 W/+ 70 °C

± 0.015 % max. R at 0.3 W/+ 125 °C

Load Life at 10 000 h

± 0.01 % max. R at 0.05 W/+ 125 °C

± 0.05 % max. R at 0.3 W/+ 125 °C

Model No.

VISHAY

XXXX

ST *

Date Code

Front View Rear View

Lead Material #22 AWG

Round Solder Coated Copper

Optional Customer Part Number

Print Specification, etc. if required

Resistance

Value Code

Tolerance

XXXXXX

100R01

Week

Year

303143 0.005%

303143, 303143L (Z-Foil)

Vishay Foil Resistors

Document Number: 63174 For any questions, contact: foil@vishaypg.com www.foilresistors.com

Revision: 29-Mar-10 3

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 

TABLE 3 - ENVIRONMENTAL PERFORMANCE COMPARISON

MIL-PRF-55182

CHAR J

VISHAY 303143, 303143L

MAXIMUM R TYPICAL R

Test Group I

Thermal Shock

Short Time Overload

± 0.2 %

± 0.01 % (100 ppm)

± 0.03 % (300 ppm)

± 0.002 % (20 ppm)

± 0.003 % (30 ppm)

Test Group II

Resistance Temperature

Characteristic

Low Temperature Storage

Low Temperature Operation

Terminal Strength

± 25 ppm/°C

± 0.15 %

± 0.2 %

see table 1

± 0.01 % (100 ppm)

± 0.05 ppm/°C

(0 °C to + 60 °C)

± 0.002 % (20 ppm)

Test Group III

DWV

Resistance to Solder Heat

Moisture Resistance

± 0.15 %

± 0.1 %

± 0.4 %

± 0.01 % (100 ppm)

± 0.02 % (200 ppm)

± 0.002 % (20 ppm)

± 0.005 % (50 ppm)

± 0.01 % (100 ppm)

Test Group IV

Shock

Vibration

± 0.2 %

± 0.01 % (100 ppm)

± 0.002 % (20 ppm)

Test Group V

Life Test at 0.3 W/+ 125 °C

2000 h

10 000 h

± 0.5 %

± 2.0 %

± 0.015 % (150 ppm)

± 0.05 % (500 ppm)

± 0.01 % (100 ppm)

± 0.03 % (300 ppm)

Test Group Va

Life Test at 0.6 W (2 x Rated Power)/+ 70 °C, 2000 h ± 0.5 % ± 0.015 % (150 ppm) ± 0.01 % (100 ppm)

Test Group VI

High Temperature Exposure ± 2.0 % ± 0.05 % (500 ppm) ± 0.02 % (200 ppm)

Test Group VII

Voltage Coefficient 0.005 %/V < 0.00001 %/V < 0.00001 %/V

303143, 303143L (Z-Foil)

Vishay Foil Resistors

www.foilresistors.com For any questions, contact: foil@vishaypg.com Document Number: 63174

4Revision: 29-Mar-10

TABLE 4 - SCREENING AND ENVIRONMENTAL TESTS

Group A

Subgroup 1

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 %

Subgroup 2

6 pieces, any value, electrical rejects allowed

Solderability

Subgroup 3

3 pieces, any value, non destructive

Mechanical/dimensional evaluation

Final Group A inspection

Group B

Subgroup 1

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

Subgroup 2

8 pieces, any value, zero rejects allowed

Resistance to solvents

Group C

Group A and B testing required

Subgroup 1

12 pieces (6 of the highest value, 6 of the lowest value), 0 rejects

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

Subgroup 2

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 VRMS, 100 V/s, 1 min, R = 0.01 %

Insulation resistance (500 VDC, 2 min, 100 M)

Subgroup 3

12 pieces (6 high, 6 low), 1 reject allowed

Dielectric withstanding voltage (DWV) (MIL-STD-202 method 301)

- 300 VRMS, 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 VDC, 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 %

303143, 303143L (Z-Foil)

Vishay Foil Resistors

Document Number: 63174 For any questions, contact: foil@vishaypg.com www.foilresistors.com

Revision: 29-Mar-10 5

Subgroup 4

9 pieces (any value), 0 rejects

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 %

Subgroup 5

5 pieces (any value), 0 rejects

High temperature exposure (2000 h, + 175 °C, 0 W)

RC record - R = 0.05 %

TABLE 5 - QUALIFICATION (10R TO 100K) (when required)

Group 1 Group A

Group 2 Group B

Group 3

10 pieces (equally divided between highest and lowest values), 1 reject

TCR (per group B conditions)

Low temperature storage (LTS)

Low temperature operation (LTO)

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 %

Group 4

12 pieces (equally divided between highest and lowest values), 1 reject

Dielectric withstanding voltage (DWV) (MIL-STD-202 method 301)

- 300 VRMS, 100 V/s, 1 min

RC record - R = 0.01 %

Insulation resistance (MIL-STD-202 method 302)

- 10 000 M min.

- 500 VDC, 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 VDC, 2 min, 100 M)

Group 5

10 pieces (equally divided between highest and lowest values), 1 reject

Shock - (100G, 6 ms, sawtooth condition I), R = 0.01 %

Vibration - (10 Hz to 2 kHz, condition D), R = 0.01 %

Group 6

10 pieces (equally divided between highest and lowest values), 1 reject

Solderability

Resistance to solvents

Group 7

10 pieces (equally divided between highest and lowest values), 1 reject

High temperature exposure (2000 h, + 175 °C, 0 W), R = 0.05 %

Group 8

50 pieces (equally divided between highest and lowest values), 0 reject

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

Group 9

30 pieces (high/low)

Thermal shock - 100 cycles, - 65 °C to + 150 °C, R = 0.035 %

Group 10

10 pieces (highest value only)

Voltage coefficient (R = 1 ppm/V)

TABLE 4 - SCREENING AND ENVIRONMENTAL TESTS

303143, 303143L (Z-Foil)

Vishay Foil Resistors

www.foilresistors.com For any questions, contact: foil@vishaypg.com Document Number: 63174

6Revision: 29-Mar-10

Notes

(1) For unqualified pre-flight or prototype units, use model #303143U which includes only the 100 % screening requirements

(2) 0.200" (5.08 mm) lead spacing available - specify 303143L

PART NUMBER IDENTIFICATION

Model # 303143 (1) 303143L (2)

Base Model Z201 Z201

Value Range (Space Applications) 10  to 100 k10  to 100 k

Part Number:

{Model} - {Value} - {Tolerance} - {Termination} - {Packaging}

Absolute Tolerance Code Termination Code Packaging Code

0.005 % V Tin/lead B Bulk L

0.01 % T

0.02 % Q

0.05 % A

0.1 % B

0.25 % C

0.5 % D

1.0 % F

Example: 303143 - 8K023 - VBL

Z201, 8.023 k, 0.005 %, tin/lead termination, bulk pack

Vishay Precision Group

Document No.: 63999

Revision: 27-Apr-2011

www.vishaypg.com

Legal Disclaimer Notice

Disclaimer

Legal Disclaimer Notice

Disclaimer

Document No.: 63999

Revision: 27-Apr-2011

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behalf (collectively, “Vishay Precision Group”), disclaim any and all liability for any errors, inaccuracies or

incompleteness contained herein or in any other disclosure relating to any product.

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