1、a a I a a a O (U v) I W a - EIA 520AAAA-A 91 3234600 0077347 - ANSI/ IA- 52 O AAAA- A- 19 QI APPROVED: May 31,1991 EIA SPECIFICATION Detail Specification for Nonsensitive Pushbutton Switch Single-Pole Contact E IA=520AAAA=A (Revlcion of EIA-52OAAAA) ELECTRONIC IN DUSTRI ES ASSOCIATION ENGINEERING DE
2、PARTMENT Approved For Use In The NEC0 System EIA 520AAAA-A 93 I 3234600 0077348 T NOTICE EIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of
3、 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 non-member of EIA from manufacturing or selling products not conforming to suc
4、h Standards and Publications, nor shali the existence of such Standards and Publications preclude their voluntary use by those other than EIA members, whether the standard is to be used either domestically or internationally. Recommended Standards and Publications are adopted by EIA without regard t
5、o whether their adoption may involve patents on articles, materials, or processes. By such action, EIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Recommended Standard or Publication. This EIA Specification is considered to ha
6、ve International Standardization implication, but the International Electrotechical Commission activity has not progressed to the point where a valid comparison between the EIA Specification and the IEC document can be made. This Specification does not purport to address all safety problems associat
7、ed with its use or all applicable regulatory requirements. It is the responsibility of the user of this Specification to establish appropriate safety and health practices and to determine the applicability of regulatory limitations before its use. COPYRIGHT 1991 Published by ELECRONIC INDUSTRIES ASS
8、OCIATION Engineering Department 2001 Pennsylvania Avenue N.W. Washington, D.C. 20006 PRICE Please refer to the current Catalog of EM the latest issue of EIA 520A000, Sectional Specification for Pushbutton Switches of Certified Quality; and the latest issue of EIA 5200000, Generic Specification, Spec
9、ial Use Electromechanical Switches of Certified Quality. 1. GENERAL 1.1 SCOPE The family of momentary contact, nonsensitive pushbutton switches covered by this detail specification: a) mount in a panel hole with a clearance diameter for a 1/4-32UNEF-2A thread. b) have a maximum rated voltage of 115
10、Vac. .A c) have a maximum rated current of 1 A 1.2 “PE DESIGNATION Switches covered by this detail specification shall be identified as follows and in the order shown: a) the number of this detail specification. b) discrete switch identification per Table N. EXAMPLE: EIA 520- 001 Discrete switch ide
11、ntification per Table IV Number of this detail specification 1.3 MARKING The marking of the switch and containing package shall be in accordance with paragraph 2.5 of Generic Specification EIA-5200000. O O O EIA 52OAAAA-A 91 W 3234600 0077152 1 W ELA-520AAAA-A Page 3 e 1.4 ORDERING INFORMATION Order
12、s for switches covered by this specification shall contain the following information as a minimum: O - a) the applicable part number per paragraph 1.2. b) when certified records of released lots are required, include “CERTIFIED RECORDS REQUIRED. 1.5 CERTIFIED RECORD OF RELEASED LOTS When required in
13、 contract or order, information noted in 3.4.1 of ELA-5200000 should be provided. 1.6 SAFETY CONSIDERATIONS The user shall consider the suitability of the switch with regard to any safety requirements applicable to the end use equipment. 1.7 COMMON FEATURES - See cover page 1.8 DIMENSIONAL PARAMETER
14、S - See Figures 1 thru 5 1.9 RATINGS and CHARACTERISTICS 1.9.1 RATINGS .I z O * Altitude - Not Applicable * Electrical - power - 115 Vac, 1 A * Electrical - logic level - 5 Vdc, 10 mA * Electrical - low level - 30 mVdc, 10 mA * Flammability - Plastic materials certified per UL94 V2 or better. * Flui
15、d resistance - Not Applicable * Fungus resistance - Not Applicable * Icing - Not Applicable a EIA 520AAAA-A 91 m 3234600 0077353 3 m Em-520AAAA-A Page 4 * Moisture resistance - Applicable * Random vibration - Not Applicable * Salt spray - Applicable, 48 hours. * Sand and dust - Not Applicable * Seal
16、ing - Applicable for sealed switches only (see Table N). * Shock - Applicable, 100 g, sawtooth, 6 ms Duration (Test Condition H of EIA-448 Method 12). * Temperature - -55“ C to 85“ C. * Thermal shock - Applicable, -55O C to 850 C. * Vibration - Applicable, 15 g, 10-2000 Hz 1.92 CHARACTERISTICS * Act
17、uator grounding - Not Applicable * Altitude voltage proof - Not Applicable * Capacitance - 5 pF max. * Contact bounce - Not Applicable * EMI shielding - Not Applicable * Endurance - Electrical See Table IV Logic Level 100,000 cycles Low Level 100,000 cycles * End stops - Not Applicable * Immersion i
18、n cleaning solvents - Not Applicable * Insulation resistance - 1000 megohms min. at 100 Vdc. * Lamp circuit resistance - Not Applicable * Low temperature operation - Not Applicable _ - - - . - - - - EIA 520AAAA-A 93 3234600 0077354 5 EIA-52OAAAA-A Page 5 * Mass - See Table IV * Operating characteris
19、tics - See in Table IV. * Overload - Not Applicable * Resistance to soldering heat - Not Applicable * Strength of actuator - 10 lb along switch axis and in same direction as operating force, (FT of EM-5200000, Test 6-1, Figure la). When applicable, force required to remove button cap shall be 3 lb m
20、inimum, applied along switch axis and opposite to operating force. * Strength of mounting bushing 15 lb-in torque * Strength of screw mounting - Not Applicable * Strength of termination - 5 lb * Solderability - Applicable * Stray light - Not Applicable * Sunlight readability - Not Applicable * Switc
21、h resistance - specified current - 25 milliohms initially, 250 milliohms after test. * Temperature rise - Not Applicable * Voltage proof - 1000 Vac 2. INSPECTION REQUIREMENTS 2.1 Qualification Approval inspection requirements shall be in accordance with Table I herein. 2.2 Quality Conformance inspec
22、tion requirements are prescribed in Table II herein for lot- by-lot inspections, and in Table III herein for periodic inspections. For Visual Examination, the classification of major and minor defects shall be as follows: EIA 520AAAA-A 7% 323Llb00 0077155 7 m EIA-52OAAAA-A Page 6 Major characteristi
23、cs for visual examination: Proper assembly Proper termination Physical damage 2.3 Endurance tests shall be run with the loads and durations shown below. No more than one (1) stick or miss per 1000 cycles is permitted. Load No. Qcle Test Time Test No. Electrical Endurance 8-1 Logic Level Endurance 8-
24、4 Low Level Endurance 8-5 115 Vac, 250 mA See 30 mVdc, 10 mA IV 5 Vdc, 10 mA Table EIA 520AAAA-A 93 m 3234600 0077356 9 m HEX. “TING PUT ,?j$) ACROSS FLATS THICK 1/4-32 MF-2A TWEAO (:)MAX. DIA. EM-520AAAA-A Page 7 CIRCUIT DIAGRAM I r-1 FIGURE I PART -001. -002 CIRCUIT DIAGRAM I %-a SINGLE POLE SINGL
25、E THROW NORMALLY OPEN FIGURE 2 PART -003, -004 (“i811 1/4-32 UNEF-ZA TCREAO - HEX. MXMTING ru1 9.5 ACROSS FLATS (.5751 (2i;) THICK CIRCUIT DIAGRAM - 6a SINGLE POLE SINGLE THROW NORMALLY CLOSED FIGURE -3 PART -005, -006 .EIA 520AAAA-A 93 m 3234600 0077357 O W EIA-520AAAA-A Page 8 t (. 19) 1 - pf 9.53
26、 (.375) ri I I - BUTTONCAP / - 114- HEX. 7.92 “TING HIT ( ACROCS FLATS ( THICK .- CIRCUIT DIAGRAM I r-3 FIGURE 4- PART -007, -008 SINGLE PME SINGLE THROW NORMALLY CLOSED FIGURE 5 PART -009, -010 NOTES. APPLICABLE TO ALL FIWES: I. DIMENSIONS ARE DENOTED AS FOLLOWS: 0.0 = MM (0.000) = INCHES 2. METRIC
27、 DIMENSIONS ARE BASED UPON 1.0 INCH = 25.4 MILLIMETERS. 3. UNLESS OTHERWISE SPECIFIED, INCH DIMENSION TOLERANCES ARE: TWO PLACE .00) = t.015 THREE PLACE (.O001 = *.O10 TERMINAL DETAIL. TYPICAL FOR ALL FIGURES. EIA 520AAAA-A 91 3234b00 0077358 2 c EI A-SOAAAA-A Page 9 TABLE 1 QUALIFKATION APPROVAL IN
28、SPECiON TEST D/ND ND ND ND ND ND ND ND D D D D ND ND ND ND ND ND D ND ND - ts. - t.d 9d 25 ea (1) Test Method & Group Test No. GrOUD A Visual Examination Dimensions Functional Operation Switch Resistance Voltage Proof Operaihg Characteristics 1-1 1-2 1-5 2-2 3-1 1-6 M M M M M M Grow B Capacitance So
29、lderability Strength of Terminals Strength of Actuator Electrical Endurance Temperature Rise Operating Characteristics Switch Resistance Insulation Resistance Voltage Proof Seal 17-1 11-2 6-4 6-1 See 2.3 4-1 14 2-2 2-5 3-1 13-1 M M M M M M M M M M ws 5 ea. (i) 1 Group 5 ea. (1) Logic Level Endurance
30、 Switch Resistance Operating Characteristics See 2.3 2-2 14 M M M 5 ea. (1) GrouD D See 2.3 2-1 1-6 M D M ND M ND Low Level Endurance Switch Resistance Operating Characteristics 5 ea. (1) Thermal Shock Vibration Shock Humidity Operating Characteristics Switch Resistance Insulation Resistance 10-2 5-
31、3 5-2 10-1 1-6 2-2 2-5 3-1 M D M D M D M D M ND M ND M ND M ND Group F Sait Spray 10-4 M D 5 ea. (1) EIA-520AAAA-A Page 10 EIA 520AAAA-A 91 3234600 0077159 4 = * KEY: M = mandatory test WS = when specified test D = destructive test ND = nondestructive test t.s. = minimum quantity of test specimens t
32、.d. = maximum permissible number of defective units per test g.d. = maximum permissible number of defective units per group F m NOTES: (1) = Twenty-five of each switch type requiring qualification shall be used in Group A. Five of each switch type requiring qualification shall be used in Groups B,C,
33、D,E,F. .:. EIA 520AAAA-A 91 W 3234600 0077360 O W E LA-520AAAA-A Page 11 TABLEB LOT-BY-LOT INSPECTION TESTS Test Methods and Test Groups (Test Frequency) Acceptance A (Lot-By-Lot) Group A (Lot-Bv Lot) Visual Examination Major Minor Functional Operation Switch Resistance Periodic Tests Group B (every
34、 6 months) Test No. D/ND 1-1 ND 1-5 ND 2-2 ND Table III PERIODIC INSPECTION TESTS Dimensions 1-2 Operating Characteristics 1-6 Switch Resistance 2-2 Insulation Resistance 2-5 Voltage Proof 3- 1 Panel Sealing (when specified) 13-1 Solderability 11-2 Group C (everv 36 months) Requalification per Table
35、 I ND ND ND ND ND ND D Assessment Levels Level “C (3) - IL AOL I 1.5 4.0 II 1.0 s3 1.5 Level C (3) t.s. (4) t.d 2 2 10 10 - 10 10 10 (1) EIA 520AAAA-A 91 E 3234b00 00771bL 2 E EIA-52OAAAA-A Page 12 KEY: D ND t.s. t.d. g.d. n.a. NOTES: (1) = = destructive test = nondestructive test - = = = minimum nu
36、mber of test samples maximum permissible defective units per test maximum permissible defective units per group test is not applicable if no changes have been made to the design or manufacturing processes. The resilient and hermetic seal tests may be performed as in-process inspections and the accep
37、tance inspection may then be limited to the watertight test for gross leaks. The quantity of test specimens shall be the same as required for qualification approval tests. Assessment Level C is the minimum acceptable level. Additional, higher Number of samples required for each qualified switch type
38、. levels can be developed as required for specific Detail Specifications. bb EIA STANDARD AND SPECIFICATION NUMBERING Standard or Generic Specification Standard Prefix for all Numbers Sectional Specification Designator Blank Detail Specification Designator ZI % STANDARD A document that establishes e
39、ngineering and technical requirements for processes, procedures, practices and methods that have been decreed by authority or adopted by consensus. Standards may also be established for selection, application and design criteria for material. (* Standards and other documents not in the specification
40、 format use only the EIA basic numbering system as follows: EIA-123 Original Standard EIA-123-1 Addendum to Original Standard EIA-123-A First Revision of original Standard incorporating all Addenda SPECIFICATION A document prepared specifically to facilitate procurement which clearly and accurately
41、describes the essential technical requirements for purchased material. Procedures necessary to determine that the requirements for the purchased material covered by the specification have been met shall also be referenced or included. EIA Specifications use the following system: Detail Specification
42、 Designator 4 - EIA I230000 EIA 123A000 EIA 123AAOO EIA 123- EIA 123OOAA is a Generic Specification is a Sectional Specification is a Blank Detail Specification is a Detail Specification is a Detail Specification for which no Sectional or Blank Detail Specification was issued. .f 1: system. NOTES: I. Some older specifications may not have been converted to this numbering 2. See EP-11 “Guide for the Preparation of Specification Using IECQ-System Format,“ for more detail.
