1、 EIA STANDARD Thick Film Resistor Specification EIA-575-B (Revision of EIA-575-A) March 2014 EIA-575-BANSI/EIA-575-B Approved: March 3, 2014 NOTICE EIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and pur
2、chasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards and Publications shall not in any respect preclude any member or nonmember of ECIA f
3、rom manufacturing or selling products not conforming to such Standards and Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than ECIA members, whether the standard is to be used either domestically or internationally. Standards and
4、Publications are adopted by ECIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, ECIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard or Publication. This EIA Standard is
5、 considered to have International Standardization implication, but the International Electrotechnical Commission activity has not progressed to the point where a valid comparison between the EIA Standard and the IEC document can be made. This Standard does not purport to address all safety problems
6、associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations before its use. (From Standards Proposal No. 5192, formulated und
7、er the cognizance of the P-1 Committee on EIA National Resistive Devices Standards). Published by Electronic Components Industry Association 2014 Engineering Department 2214 Rock Hill Road, Suite 265 Herndon, VA 20170 PLEASE! DONT VIOLATE THE LAW! This document is copyrighted by the ECIA and may not
8、 be reproduced without permission. Organizations may obtain permission to reproduce a limited number of copies through entering into a license agreement. For information, contact: IHS 15 Inverness Way East Englewood, CO 80112-5704 or call USA and Canada (1-877-413-5184), International (303-397-7956)
9、 i CONTENTS Clause Page 1.0 Scope . 1 2.0 Definitions 5 3.0 Standard Tests 5 4.0 Quality Assessment 10 Figures Page Ambient Temperature in Degrees Celsius . 5 Tables I 2 II 3 III 3 IV 4 V 11 EIA-575-B Page 1 RESISTORS, RECTANGULAR, SURFACE MOUNT GENERAL PURPOSE (From Standards Proposal No. 5192, for
10、mulated under the cognizance of the EIA P-1 Subcommittee on Non-Wirewound Fixed Resistors.) 1.0 SCOPE This standard covers thick film general purpose rectangular leadless discrete fixed resistors with temperature coefficients of 350 PPM/C (ranging from 50 PPM/C to 350 PPM/C) and greater and resistan
11、ce tolerances of 5% (ranging from 0.5% to 5%) and greater for use in surface mounting applications using soldering techniques. 1.1 Typical Construction Characteristics The termination shall include a leach-resistant barrier layer, made of nickel or an equivalent material. The barrier layer shall be
12、covered with a layer of solderable material. 1.2 Classification The type designation shall be as follows: RC3216 K 1003 F Style Characteristic Resistance Tolerance (1.2.1) (1.2.2) (1.2.3) (1.2.4) 1.2.1 Style The style is identified by two letters describing the type of surface mount component (Resis
13、tor Chip) followed by four digits giving the resistors nominal length and width in millimeters per Table I. 1.2.2 Characteristics The characteristic is identified by a single letter in accordance with Table II. Individual part requirements shall be specified in Table II and the test paragraphs. 1.2.
14、3 Resistance The nominal resistance expressed in ohms is identified by three digits for 5% and 2% tolerance devices; the first two digits represent significant figures and the last digit specifies the number of zeros to follow. For 1% and 0.5% tolerance devices, nominal resistance is identified by f
15、our digits; the first three digits represent significant figures and the last digit represents the number of zeros to follow. When the value of resistance is less than 100 ohms for 5% and 2% tolerance and less than 1000 Ohms for 1% and 0.5% tolerance, the letter R shall be substituted for one of the
16、 significant digits to represent the decimal point. When the letter “R“ is used, succeeding digits of the group represent significant figures. The resistance value designations are shown in Table III. Zero ohm jumper chip resistors are identified by three zeros. 1.2.3.1 Standard Values The standard
17、values for every decade shall follow the sequence of IEC Publication 63. Refer to Table IV. 1.2.4 Resistance Tolerance The resistance tolerance is identified by a single letter: “D” for 0.5%, “F” for 1%, “G” for 2%, and “J” for 5%. 1.2.5 Resistance Range The resistance range applicable to this stand
18、ard is 0.10 ohms to 22 mega ohm, inclusive. Characteristics for nominal resistance values less than 10 ohms or greater than l mega ohm may differ from those specified in Table II. EIA-575-B Page 2 TABLE I TYPE BODY LENGTH (L) BODY WIDTH(W) BODY (*) THICKNESS(H) TERM WIDTH(P) RATED POWER mW MAX CWV I
19、NCH SIZE (REF) RC0402 0.40 0.02 0.20 0.02 0.13 0.02 0.10 0.03 30 15 01005 .015 0.001 .007 .001 .005 .001 .004 .001 RC0603 0.60 0.03 0.30 0.03 0.25 0.05 0.10 0.05 50 25 0201 .024 .001 .012 .001 .010 .002 .004 .002 RC1005 1.00 0.10 0.50 0.10 0.30 0.10 0.20 0.10 62.5 25 0402 .039 .004 .020 .004 .012 .0
20、04 .008 .004 RC1608 1.60 0.10 0.80 0.10 0.50 0.10 0.20 0.10 100 50 0603 .063 .004 .031 .004 .020 .004 .008 .004 RC1632 1.60 0.15 3.20 0.20 0.60 0.10 0.30 0.20 750 200 0612 .063 .006 .126 .006 .024 .004 .012 .008 RC2012 2.00 0.15 1.25 0.15 0.50 0.15 0.40 0.25 125 100 0805 .079 .006 .049 .006 .020 .00
21、6 .016 .010 RC2550 2.50 0.15 5.00 0.15 0.60 0.10 0.40 0.20 1000 200 1020 .098 .006 .197 .006 .024 .004 .016 .008 RC3216 3.20 0.15 1.60 0.15 0.56 0.15 0.50 0.25 250 200 1206 .126 .006 .063 .006 .022 .006 .020 .010 RC3225 3.20 0.15 2.50 0.15 0.56 0.15 0.50 0.25 250 200 1210 .126 .006 .098 .006 .022 .0
22、06 .020 .010 RC3246 3.15 0.15 4.60 0.15 0.56 0.15 0.50 0.25 1000 200 1218 .124 .006 .181 .006 .022 .006 .020 .010 RC3263 3.20 0.15 6.30 0.15 0.60 0.10 0.45 0.20 1500 200 1225 .122 .006 .252 .006 .024 .004 .018 .008 RC5025 5.00 0.15 2.50 0.15 0.56 0.15 0.60 0.25 500 225 2010 .197 .006 .098 .006 .022
23、.006 .024 .010 RC6332 6.30 0.15 3.20 .015 0.56 0.15 0.60 0.25 1000 250 2512 .248 .006 .126 .006 .022 .006 .024 .010 Reference: EIA PDP-100 * Dimension H includes termination solder finish EIA-575-B Page 3 WORKING TEMPERATURE RANGE: - 55 C to + 155 C TABLE II CHARACTERISTICS H K L M RESISTANCE TEMPER
24、ATURE COEFFICIENT (PPM/C) 50 100 200 350 RESISTANCE TOLERANCE (%) 0.5 (D) 1.0 (F) 1.0 (F) 5.0 (J) 5.0 (J) 2.0 (G) MAXIMUM AMBIENT TEMPERATURE AT RATED WATTAGE (C) 70 70 70 70 MAXIMUM AMBIENT TEMPERATURE AT ZERO WATTAGE (C) 155 155 155 155 MAXIMUM CHANGE IN RESISTANCE ( % + 0.05 OHM) THERMAL SHOCK (3
25、.5) 0.25 0.25 0.30 0.50 SHORT TIME OVERLOAD (3.6) 0.25 0.25 0.50 0.75 HIGH TEMPERATURE EXPOSURE (3.7) 0.25 0.50 0.75 1.25 EFFECTS OF BONDING (3.8) 0.25 0.30 0.50 0.75 TERMINAL STRENGTH (3.9) 0.25 0.50 0.50 0.50 MOISTURE RESISTANCE (3.10) 0.25 0.50 1.50 2.00 LIFE (3.14) 0.50 1.00 1.50 2.00 TABLE III
26、DESIGNATION OF RESISTANCE VALUES FOR E-96 VALUE SERIES DESIGNATION RESISTANCE OHMS R100 to R976 inclusive 0.1 to .976 inclusive 1R00 to 9R76 inclusive 1.0 to 9.76 inclusive 10R0 to 97R6 inclusive 10.0 to 97.6 inclusive 100R to 976R inclusive 100.0 to 976.0 inclusive 1001 to 9761 inclusive 1,000.0 to
27、 9,760.0 inclusive 1002 to 9762 inclusive 10,000.0 to 97,600.0 inclusive 1003 to 9763 inclusive 100,000.0 to 976,000.0 inclusive 1004 to 9764 inclusive 1,000,000.0 to 9,760,000.0 inclusive 1005 to 2205 inclusive 10,000,000.0 to 22,000,000.0 inclusive DESIGNATION OF RESISTANCE VALUES FOR E-24 VALUE S
28、ERIES 5.0% DESIGNATION RESISTANCE OHMS R10 to R91 inclusive 0.1 to 0.91 inclusive 1R0 to 9R1 inclusive 1.0 to 9.10 inclusive 10R to 91R inclusive 10.0 to 91.0 inclusive 101 to 911 inclusive 100.0 to 910.0 inclusive 102 to 912 inclusive 1,000.0 to 9,100.0 inclusive 103 to 913 inclusive 10,000.0 to 91
29、,000.0 inclusive 104 to 914 inclusive 100,000.0 to 910,000.0 inclusive 105 to 915 inclusive 1,000,000.0 to 9,100,000.0 inclusive 106 to 226 inclusive 10,000,000.0 to 22,000,000.0 inclusive EIA-575-B Page 4 TABLE IV STANDARD RESISTANCE VALUES FOR THE 10 TO 100 DECADE BY RESISTANCE TOLERANCE F 1.0%/0.
30、5% J 5.0%/2.0% F 1.0%/0.5% J 5.0%/2.0% F 1.0%/0.5% J 5.0%/2.0% 10.0 10 23.2 - 48.7 - 10.2 - 23.7 - 49.9 - 10.5 - - 24 - 51 10.7 - 24.3 - 51.1 - 11.0 11 24.9 - 52.3 - 11.3 - 25.5 - 53.6 - 11.5 - 26.1 - 54.9 - 11.8 - 26.7 - - 56 - 12 - 27 56. 2 - 12.1 - 27.4 - 57.6 - 12.4 - 28.0 - 59.0 - 12.7 - 28.7 -
31、 60.4 - 13.0 13 29.4 - 61.9 - 13.3 - - 30 - 62 13.7 - 30.1 - 63.4 - 14.0 - 30.9 - 64.9 - 14.3 - 31.6 - 66.5 - 14.7 - 32.4 - - 68 15.0 15 - 33 68.1 - 15.4 - 33.2 - 69.8 - 15.8 - 34.0 - 71.5 - - 16 34.8 - 73.2 - 16.2 - 35.7 - 75.0 75 16.5 - - 36 76.8 - 16.9 - 36.5 - 78.7 - 17.4 - 37.4 - 80.6 - 17.8 -
32、38.3 - - 82 - 18 - 39 82.5 - 18.2 - 39.2 - 84.5 - 18.7 - 40.2 - 86.6 - 19.1 - 41.2 - 88.7 - 19.6 - 42.2 - 90.9 - 20.0 20 - 43 - 91 20.5 - 43.2 - 93.1 - 21.0 - 44.2 - 95.3 - 21.5 - 45.3 - 97.6 - - 22 46.4 - 22.1 - - 47 22.6 - 47.5 - EIA-575-B Page 5 2.0 DEFINITIONS 2.1 Wattage Power rating is based o
33、n continuous full load operation at a rated ambient temperature of 70C. For operation at higher ambient temperatures, resistors shall be derated in accordance with 2.1.1. Table 1 defines the applicable power ratings per case size. 2.1.1 Derating Curve for Higher Ambient Temperatures In no case shall
34、 the maximum continuous working voltage (CWV) be exceeded. 2.2 Voltage The rated dc continuous working voltage, or the approximate sine-wave rms continuous working voltage at commercial line frequency, corresponds to the power rating as determined from the formula: E = Sq. Root of (PxR) where E = Ra
35、ted Voltage (in volts) P = Rated Power (in watts) R = Resistance (in ohms) 2.2.1 In no case shall the rated voltage be greater than the applicable maximum continuous working voltage specified in Table I. 3.0 STANDARD TESTS 3.1 Test Groups When tests are conducted, the standard test sequence and grou
36、ping shall be as shown in Table V. 3.2 Standard Test Conditions Unless otherwise specified, the atmospheric conditions at which tests are made are as follows: Temperature 25 C 3 C Barometric Pressure 30 2 inches of Hg Relative Humidity less than 60 % EIA-575-B Page 6 3.2.1 Mounting a) Thermal Shock,
37、 Short Time Overload, Moisture Resistance, Terminal Strength, Temperature Coefficient and Load Life tests shall be performed with the units mounted resist side up by their normal means on a glass epoxy test substrate, FR4 or equivalent, having a thickness of 1.6 mm (0.063 in) with a surface area of
38、at least 4 times the resistor surface for each unit being tested. The copper foil thickness of the test board shall be 0.035 mm (0.001 in.) nominal. For other tests, the resistor may be tested mounted or unmounted and pressure type contacts used. b) Units shall be mounted with 60/40 or 63/37 perform
39、s or paste. A nonactivated flux shall be used. c) The substrate shall be placed in or on a suitable heat transfer unit (e.g. molten solder, hot plate, tunnel oven). The temperature of the unit shall be maintained between 215 and 260 degrees Celsius until the solder melts and reflows forming a homoge
40、neous solder bond, but for no longer than 10 seconds. Note 1: Flux shall be removed by a suitable solvent treatment. All subsequent handling shall be such as to avoid contamination. Care shall be taken to maintain cleanliness in test chambers and during post-test measurements. 3.3 Visual and Mechani
41、cal Resistors shall be examined under appropriate magnification, 5X minimum, to verify that dimensional and physical appearance is in accordance with the applicable requirements. 3.4 DC Resistance The dc resistance or the equivalent percentage deviation from the specified nominal value shall be meas
42、ured. 3.4.1 Measuring Apparatus The apparatus shall have the capability of a full-scale accuracy of 0.01% on the lowest scale. The same instrument shall be used for any one test, but not necessarily for all tests. 3.4.2 Temperature The dc resistance test shall be performed at 25 degrees Celsius plus
43、 or minus 3 degrees. 3.4.3 Method of Contact Resistance shall be measured by applying pressure type contacts to the termination areas of the resistor or by wire leads on a test substrate (3.2.1) on which the resistor is mounted. 3.5 Thermal Shock Resistors shall be tested in accordance with Method 1
44、07 of MIL-STD-202. The following details and exceptions shall apply. a) Mounting: Resistors shall be mounted on a test substrate (3.2.1) and placed in containers which allow circulation of air to each resistor. b) Measurement before cycling: Resistance shall be measured as specified in 3.4. c) Test
45、Condition: Condition “C” except Step l shall be at 55 C +0/-5C , step 3 shall be 155 +3/-0 C and the number of cycles shall be 500. d) Measurement after cycling: After removal of the resistors from the chamber, the temperature of the resistors and the test fixture shall be stabilized at 25C 3C for a minimum of 30 minutes and the dc resistance again measured. When resistors are tested as specified, there shall b
