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1、 E I A 446-A 1 3234600 OOb736 1 - - 7 NON-SENSITIVE PUSHBUTTON SWITCHES ANSI/EI A RS-446 -A49 8 1 APPROVED SEPTEMBER 8, 1981 EIA STANDARD 1 RS-44.6-A (Revision of RS-446) I I (Inclusion of RS-446-1 and RS-446-2) OCTOBER 1981 Engineering Department ELECTRONIC INDUSTRIES ASSOCIATION Copyright Electron
2、ic Components, Assemblies Cycle The actuation, or actuations, necessary to close or open a set, or sets, of contacts and return to the original mode. 4.2.7 Cycling Rate The number of cycles of operation for a given time period. c Copyright Electronic Components, Assemblies 30% on, 70% off). 4.2.11 F
3、ilter, Color A device used to project color to the display screen or an illuminated button. 4.2.12 Free Position The initial position of the actuator when no external force (other than gravity) is applied to i+; applies to momentary switches only. . , . . . 4.2.13 Full Overtravel Force C The straigh
4、t line force required.to move the switch actuator from the free position to the total travel position. A button (actuator) with an associated light source(s) which can give visual indication by illumination. The light source(s may be related to, or independent of, the button action. 4.2.14 Illuminat
5、ed Button 4.2.15 Lamp A generic term for a man-made light source. By extension, the term is also used to denote sources that radiate in regions of the spectrum adjacent to the visible. 4.2.16 Legend Visual information such as numbers, words, abbreviations, or symbols displayed on a button. 4.2.17 La
6、tched Position The mechanical position of the actuator after operation to maintain the circuit transfer. Copyright Electronic Components, Assemblies The marking shall be examined for correctness and legibility. 6.1.2 Standard The switch shall.be manufactured in a careful workmanlike manner. The mark
7、ings shall be correct and legible, 6 2 Dimensional Examination 6.2.1 Method of Measurement The specified dimensions shall be measured by appropriate means. 6.22 Standard The dimensions shall be in accordance with the detail specification. 6.3 Operating Characteristics 6.3.1 Method of Measurement The
8、 specified operating characteristics shall be measured by any ap- propriate means. 6,3.2 Standard The operating characteristics shall be in accordance with the detail specification, 6.4 Switch Resistance 6.4.1 Definition Switch resistance is the total eleetrical resistance of the conducting parts of
9、 the switch which i s determined by dividing the voltage drop across the switch terminations by the current flowing through the switch, 6 . 4 J Method of Measurement The switch shall be measured in accordance with EIA Recommended Standard RS-448 “Standard Test Methods for Electromechanical Switch- e
10、sfil Method 1. The following details shall apply: 6.4.2.1 Method of Connection Between the terminals of the contacts of the same pole forming a switch circuit. 6*4.2.2 Test Current 100 mA - +2%. Copyright Electronic Components, Assemblies between adjacent terminals of mutually insulated circuits; an
11、d between all unconnected contact terminals of the same pole. The test voltage shall not be applied across the light source(s). 6.5.2.3 Number of Measurements One for each test voltage application specified in 6.5.2.2 for each operating position of the switch. Redundant measurements are not required
12、. 6.5.3 Standard The insulation resistance shall not be less than the value specified by the detail specification, or 1000 Ma. Copyright Electronic Components, Assemblies mechanical and high-law temperature endurance tests are optional along with the required electrical endurance test in this Standa
13、rd. IEC Publication 341-1 suggests a single test sequence for qualification (although the detail specification can presumably deviate from this). This Standard allows for “talaring“ of qualification tests to suit various applicatianse Test sequence differs as welI, Copyright Electronic Components, A
14、ssemblies any additions or deviations to these requirements are t o be included in this section along with an explanation of the changes .) (Add any additional definitions neces- PERFORMANCE REQUIREMENTS The performance requirements of Paragraph 6.0 apply as follows: (Ail of the performance requirem
15、ents are to be listed, as illustrated below. The performance requirements of Paragraph 7.0, Table 3, Test Group A shall always apply, with additional test groups specified as necessary to adequately cover the needs of the switches described. Appropriate limiting values and details must be specified.
16、 The detail specification may take precedence over the Paragraph 6.0 requirements as long as the minimum requirements of Test Group A are met; Values, and other information in ,the right-hand column are shown for illustrative purposes only. Those requirements with asterisks represent minimum accepta
17、ble performance requirements as found in Table 3, Test Group A.) 6.1 Visual Inspection 6.2 Dimensional Examination 6.3 Operating Characteristics 6.4 Switch Resistance 6.5 Insulation Resistance Marking per paragraph 3.2* Per Dimensional Drawing Per Table 4* ,600 ohm maximum* 1000 megohms minimum at 5
18、00 Vdc 6.6 Voltage Proof 1000 volts Copyright Electronic Components, Assemblies & Materials Association Provided by IHS under license with ECA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 21:01:03 MDTNo reproduction or networking permitted without license from IHS
19、-,-,- RS-446-A Page 31 6.7 Temperature Rise 30OC maximum* 6.8 Capacitance (When applicable) 6.9 Actuator Strength . 6.5 kilograms (10 pounds)* 6.10 Strength of Mounting Means (When applicable) 6.11 Terminal Strength2 Solderable and $crew Terminations 2 kilograms (4.4 pounds)* Wire Lead Termination 2
20、 kilograms (4.4 pounds) Per ANSI/EIA RS-186-6E, Type I Test* 6.12 Chromaticity (When applicable) 6.13 Transmittance (Luminance) (When applicable) 6.14 Overload (When applicable) 6.15 Electrical Endurance .Per Table 3* 6.16 Mechanical Endurance Refer to High-Low Temprature En- durance Ratings 6.17 Hi
21、gh-Low Temperature Endurance 100,000 cycles at -4OOC and +65QC and at 60 cycles per minute. units shall be equally divided between the two temperatures. The test 6.18 Temperature Shock 6.19 Effect of Soldering 6.20 Solderability 6.21 Vibration 6.22 Shock 6.23 Humidity 6.24 Corrosion 6.25 Contact Bou
22、nce -4OOC and +85OC (When applicable) Applicable to Solderable and Wire Lead Terminations* Type I (10 GIs, 10-500 Hz) Test Condition .C (50 GIs) (When applicable) (When applicable) (When applicable) Copyright Electronic Components, Assemblies & Materials Association Provided by IHS under license wit
23、h ECA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 21:01:03 MDTNo reproduction or networking permitted without license from IHS -,-,- - EIA.44b-A 81 W 3234600 00b970 I W Sample Group RS-446-A Page 32 . No. of Samples Jest Groups rr*r (From Table 3) 7.0 QUALITY ASSU
24、RANCE 7.1 Qualification Qualification shall be in accordance with. Paragraph 7 . 1 . Qualification tests (for multiple product approvals) shall be as follows: . -, . TABLE C1 . . e. . a I I Sample Group Description: 1 il. 7.2 Quality Conformance Inspection Quality Conformance Inspection shall be in
25、accordance with Paragraph 7,4. (Major visual examination characteristics should be listed.) 8.0 ORDERING INFORMATION 8 . 1 0.2 8.3 Standard Switch (Specify the part number from Paragraph 8.3 which defines the re- quired switch. added only if an EIA Detail Specification is being prepared.) This order
26、ing information for a standard Switch should be Non-Standard Switch (Provide a precise description of the desired switch, It is preferred that this be done via the selection of an existing EIA part number which defines the nearest equivalent standard switch accompanied by a description of the desire
27、d deyiations from the standard Switch. Any limitations on the allowable deviations- must be noted here.) Part Number (Each standard switch covered by this specification shall be assigned a discrete part number in accordance with the code system shown in Appendix D . ) Copyright Electronic Components
28、, Assemblies & Materials Association Provided by IHS under license with ECA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 21:01:03 MDTNo reproduction or networking permitted without license from IHS -,-,- - L - E I A 44b-A 81 m 3234600 00b897L 3 m RS-446-A . Paae 33
29、 . TYPICAL EXAMPLE OF DRAWINGS AND DIMENSIONS I! I I I TOL. I I I L, I I THIRD ANGLE PROJECTION RECOMMENDED PANEL CUT-OUT THREAD THIRD ANGLE PROJECTION RECOMMENDED PANEL CUT-OUT TOL. = TOCERANCED (* 1 DIMENSION. MAX. = MAXIMUM AUOWABLE DIMENSION. F I G U R E c i - Copyright Electronic Components, As
30、semblies & Materials Association Provided by IHS under license with ECA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 21:01:03 MDTNo reproduction or networking permitted without license from IHS -,-,- I E I A 446-A 1 = 3234600 0068972 5 W - RS-446-4 Page 34 Titles o
31、f detail specifications shall be derived in the following sequence: (1) Illumination-Denote as Illuminated and/or Non-Illuminated. (2) Basic Identifier-Denote as either .- (A) Pushbutton Switch, or (B) Non-Sensitive Pushbutton Switch. (3) Mounting Hole-Denote the basic hole size required for mountin
32、g the switch. (4) Poles-Denote the specified number of poles. (5) Current Ratings-Denote the specified current ratings. (6) Sealing-Denote the sealing capability of sealed switches only. EXAMPLES: Illuminated and Non-Illuminated Pushbutton Switches, .750“ Square Mounting, One and Two Poles, .O01 to
33、10 Amperes. (Non-Sealed Switch) .: . . Copyright Electronic Components, Assemblies & Materials Association Provided by IHS under license with ECA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 21:01:03 MDTNo reproduction or networking permitted without license from I
34、HS -,-,- E I A Li4b-A 8 1 m 323LibOO 0068973 7 m RS-446-A Page 35 APPENDIX D EIA PART NUMBERING AND CODING SYSTEM 1. Part Numbering The EIA part number is formed by selecting a variable, if applicable, froG the coding system shown below: U.S.A. National Standards Organization This (Generic) Standard
35、 Number (Including revision letter) Detail Specification Number (RS-446 -(Addend um Number) Discrete Switch Identification from the EIA Detail Specification. (May include Switch Style, Switch Configuration, Lens and Housing Configuration, and Lamp Type.) 2. Coding System The discrete switch identifi
36、cation and coding system shown below is provided for guidance information in the development of discrete switch identification information to be included in EIA Detail Specifications. Copyright Electronic Components, Assemblies & Materials Association Provided by IHS under license with ECA Licensee=
37、IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 21:01:03 MDTNo reproduction or networking permitted without license from IHS -,-,- RS-446-A I Page 36 2.0 Coding System (continued) Switch Style . 1 2 Non-Lighted 3 LED Lighted Switch Configuration O Indicator, “110l1 terminals .
38、 1 2 DPST-NO-DB (Form XX), terminals, momentary Lighted (Wedge Base Lamp) (T 1 3/4 Wedge Base Lamp) SPST-NO-DB (Form X), llllOtf terminals, momentary 3 SPDT-SB (Form C), llllOfl terminals, momentary, 4 5 Indicator, PCB terminals 6 7 8 SPDT-SB (Form C), lfllO1l terminals, two-level Alternate Action S
39、PDT-NO-DB (Form X), PCB terminals, momentary DPST-NO-DB (Form XX), PCB terminals, momentary SPDT-SB (Form C), PCB terminals, momentary 9 Lens and Housing Configuration 1 5 SPDT-SB (Form C), PCB terminals, two-levei Alternate. Action Standard Flat, housing with bezel and mounting ears Lens not suppli
40、ed, order separately, housing with bezel and mounting ears Lens Color 1 White 2 Red 3 Green 4 Blue 5 Yellow 6 Amber Copyright Electronic Components, Assemblies & Materials Association Provided by IHS under license with ECA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/20
41、07 21:01:03 MDTNo reproduction or networking permitted without license from IHS -,-,- E I A 446-A 81 = 3234600 0068775 O m R 5 -446 -A Page 37 Lens Color (continued) 7 Orange 8 Clear Transparent 9 Black (for LED switches or non-lighted switches) Lamp Type O Not supplied 1 2 3 4 Red LED 5 Green LED 6
42、 Yellow LED 6.3 V (wedge base lamp #86) 14 V (wedge base lamp #73) 28 V (wedge base lamp #85) Copyright Electronic Components, Assemblies & Materials Association Provided by IHS under license with ECA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 21:01:03 MDTNo repr
43、oduction or networking permitted without license from IHS -,-,- LIST OF RELATED EIA STANDARDS In addition to this Standard, the following EIA Recommended Standards are available in the area of switches: RS-186-E Standard Test Methods for Passive Electronic Component Parts - General Instructions and
44、Index of Tests RS-3 15-8 Rotary switches, Low Power RS-421 EIA/NARM Standard for Dry Reed Switches RS-446-3 Detail Specification Illuminated and Non-Illuminated Pushbutton Switches .750 Square Mount- ing, 1 and 2 Poles, .O01 to 10 Amperes RS-446 -4 Detail Specification Illuminated and Non-Illuminate
45、d Non-Sensitive Pushbutton Switches, .625 Square Mounting, 1 and 2 Pole, 1.0 Ampere RS-448 Standard Test Methods for Electromechanical Switches RS-476 Source and Date Code Marking For a free and complete listing of these and all EIA Standards and Publication, write: ELECTRONIC INDUSTRIES ASSOCIATION
46、 Standards Sales Office 2001 Eye Street, N.W. Washington, D.C. 20006 Copyright Electronic Components, Assemblies & Materials Association Provided by IHS under license with ECA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 21:01:03 MDTNo reproduction or networking permitted without license from IHS -,-,-