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number BUS-12-087 type product specification title page revision 1 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 1.0 general this specification covers gold plated rib cage tm ii printed wiring board connectors designed for parallel (vertical) interconnection of printed wiring boards in low power applications as well as lead free product that meets the requirement of the european union directives of restriction fo r hazardous substances (directive 2002/95/ec). the receptacle assemblies (figure 1) are designed for mating with shrouded headers (figure 2) having double rows of .018 inch formed pins on .050 inch center s. this specification is composed of the following sections: paragraph title page 1.0 general 1 2.0 applicable dicuments 1 3.0 requirements 2 3.1 qualification 2 3.2 materials-receptacle assemblies 2 3.3 materials-shrouded headers 3 3.4 design and construction 3 3.5 electrical characteristics 3 3.6 mechanical characteristics 9 3.7 environmental conditions 11 4.0 product qualification provisions 15 4.1 equipment calibration 15 4.2 inspection conditions 15 4.3 qualification inspection 15 4.4 requalification testing 15 2.0 applicable documents the following documents, of the issue in effect on the date of the latest revision of this specification, shall form a part of this specification to the extent specified herein. specifications federal qq-s-571 solder: lead alloy, tin-lead alloy, and tin alloy; flux cored ribbon and wire, solid form qq-n-290 nickel plating, electrodeposited military mil-f-14256 flux, soldering, liquid (rosin base), activated mil-m-24519 molding plastics, polyester, thermoplastic mil-g-45204 gold plating, electrodeposited mil-c-45662 calibration system requirement mil-f-55110 printed wiring boards pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 2 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 standards military mil-std-202 test methods for electr onic and electrical component parts mil-std-275 printing wiring for electronic equipment mil-std-1344 test methods fo r electrical connectors industry specifications/standards astm b-194 copper-beryllium alloy plate, sheet, strip, and rolled bar ul-94 tests for flammability of plastic materials 3.0 requirements 3.1 qualification connectors (figure 1) and headers (figure 2) furn ished under this specific ation shall be products capable of meeting the qualification test requirement s specified herein. new products of the same type shall be considered qualified by similarity pending actual testing. 3.2 connector materials the material for each part shall be as specified herein, or equivalent. substitute material shall meet the performance requirements of this specification. 3.2.1 contact - the contact shall be full hard (hm) beryllium copper. 3.2.2 insulator housing - all housing material shall be rated flame retardant 94 v0 in accordance with ul-94. the housing shall be glass filled thermoplastic in accordance with mil-m-24519. 3.2.3 contact finish - the contact shall be plated in the contact area with 30 microinches (minimum) gol d per mil-g-45204, type ii, grade c, over nickel, per qq-n-290, class 2. in the so ldering area the contact shall be tin/lead plated 100 microinches min. over nickel or pure tin plated 100 microinches min. over nickel. pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 3 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 3.3 header materials 3.3.1 pin - the pin shall be 1/2 hard phosphor bronze. 3.3.2 insulator housing - all housing material shall be rated flame retardant 94 v0 in accordance with ul-94. the housing shall be glass filled thermoplastic, minimum heat deflecti on temperature 500 degrees f @ 264 psi in accordance with mil-m-24519. 3.3.3 pin finish - the pin shall be plated with 30 microinches (minimum) gold per mil-g-45204, type ii grade c over 50 microinches (minimum) nickel per qq-n-290 class 2 in the contact area. in the soldering area the pin shall be tin/lead plated 100 microinches min. over nickel or pure tin plated 100 microinches min. over nickel. 3.4 design and construction the connector shall be a multi-piece assembly hav ing two rows of contacts with solder tail terminations for installation in .023 inch diameter holes in a 1/16 inch thick printed wiring board. the female end of the contact shall interface with 0.018 inch formed pins on .050 inch centers, as appropriate. 3.4.1 mating - the connector shall be capable of mating with a maximum of 5.5 oz and minimum of 1.5 oz per position. 3.4.2 workmanship - connectors shall be uniform in quality and shall be free from defects that will adv ersely affect life or serviceability. 3.4.3 interchangeability - connectors shall be capable of mating with any fci approved .050 inch center header. 3.5 electrical characteristics 3.5.1 current rating - the temperature rise above ambient shall not exceed 30 o c at any point in the system w hen all contacts are powered at 1.0 ampere or when one contact is powered at 2. 5 amperes. the following details shall apply: a. ambient conditions - still air at 25 o c. b. reference - bus-03-601 pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 4 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 5 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 figure 2 - rib cage tm mating header (p/n 87405) pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 6 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 table i - contact resistance maximum resistance - milliohms maximum resistance milliohms initial after test 20 25 3.5.2 low level circuit resistance - the low level circuit resistance shall not exceed the value s pecified in table i when measured using a keithley model 580 (or similar instrument) in the pulse mode and dry circuit conditions. the following details shall apply: (a) method of connection: see figure 3. (b) test current: 100 milliamperes maximum pulsed current. (c) maximum open circuit voltage: 20 millivolts. 3.5.3 insulation resistance - the insulation resistance of mated/unterminated connectors sha ll be not less than 50,000 megaohms (5,000 megaohms after exposure of the humidity environment described in paragraph 3.7.1) when measured in accordance with mil-st d-202, method 302. the following details shall apply: (a) test condition: b (500 volts dc) (b) special preparation: the connector s hall not be terminated because of the type of printed wiring board and the geometry of its land area will affect this parameter. (c) points of measurement: between adj acent and opposing contact positions for 20 percent of connector population. pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 7 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 3.5.4 dielectric withstanding voltage - there shall be no evidence of arc-over, insulation break down, or excessive leakage current (>1 milliampere) when the mated/unterminated c onnectors are tested in accordance with mil-std-202, method 301. the following details shall apply: (a) test potential: 800 volts ac, rms at 60 hz (b) test duration: 60 seconds (c) special preparation: the connector s hall not be terminated because the type of printed wiring board and the geometry of it s land area will affect this parameter. (d) points of measurement: between adjacent and opposing contact positions for 20 percent of connector population figure 3 contact resistance measurement schematic note: voltmeter probes positioned on traces corresponding to positions being tested. pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 8 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 3.5.5 capacitance - the capacitance between pairs of adjacent or opposing contacts in an unmated connecto r shall not exceed 1.0 picofarad when measured in accordance with mil-std-202, method 305. the following details shall apply: (a) test frequency: 100 kilohertz (b) special preparation: the connector s hall not be terminated because of the type of printed wiring board and the geometry of its land area will affect this parameter (c) sample size: 20 percent of connector population 3.6 mechanical characteristics 3.6.1 contact retention 3.6.1.1 receptacle assembly - individual contacts in the unterminated connector shall withstand an axial load of 1.0 pound average (.7 pound minimum) in the di rection of normal pin insertion without dislodgment. 3.6.1.2 shrouded header - individual contacts in the unterminated connector shall withstand an axial load of .7 pounds minimum in the direction of nor mal contact insertion without dislodgement. 3.6.2 total mating force - the total force to mate the terminated connector with an appropriately populated header consisting of properly configured (see figure 2) 0.018 inch formed pins shall be 1.5 to 5.5 ounces times the number of terminals. 3.6.3 individual contact withdrawal force - after three insertions of a properly cleaned and lubric ated maximum gage pin, the force required to withdraw a properly cleaned and lubricat ed minimum gage, configured as shown in figure 4, shall be not less than 10 grams. 3.6.4 durability - after 200 mating cycles with mating header, the average contact withdrawal force s hall be not less than 10 grams and the contact resistance shall not exceed the value s pecified in table i (see paragraph 3.5.2). pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 9 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 figure 4 insertion/withdrawal standard gage pin material: standard gage pin tool steel. lubricant: 10% nye oil in 90% isopar h by weight. clean and lubricate gage pin before each use as follows: a. scour surface with mildly abrasive material, i.e. abrasive rubber eraser. b. wash surface with alcohol and dry with clean cotton. do not touch surface with fingers . c. dip gage pin in lubricant and air dry. pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 10 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 3.7 environmental conditions 3.7.1 humidity - within 1 hour after exposure of the connectors to a high humidity environment, the insula tion resistance of an unterminated connector shall be not less than 5000 megaohms (see paragraph 3.5.3) and the contact resistance of a terminated and mated connector shall not exceed the value specified in table i (see paragraph 3.5.2). the test s hall be in accordance with mil-std-202, method 103; the following details shall apply: (a) test duration: 96 hours (b) relative humidity: 90% minimum (c) temperature: 40 o c 3.7.2 thermal shock - after exposure of the connectors to alternate periods of extreme high and low temperature, there shall be no evidence of cracking or crazing of the insulator housi ng or other physical damage to the connector; the insulation resistance shall meet paragraph 3.5.3; the dielectric withstanding voltage of an unterminated connector shall be not less than 800 volts (see paragraph 3.5.4) and the contact retention shall be not le ss than 0.3 pounds (see paragraph 3.6.1). the test shall be in accordance with mil-std- 202, method 107; the following details shall apply: (a) test conditions: a-1 (25 1-hour cycles) (b) temperature range: -55 to +130 o c 3.7.3 high temperature life - after exposure of the mated connector to a high temperature operating environment, the contact resistance shall not exceed the value specified in tabl e i (see paragraph 3.5.2) and the insulation resistance of the connectors shall meet secti on 3.5.3. the test shall be in accordance with mil-std-202, method 108; the following details shall apply: (a) test chamber temperature: 100 o c (b) test condition (duration): b (250 hours) (c) operating conditions: rated current (see paragraph 3.5.1) through all contacts of terminated connector; duty cycle: 45 minutes on and 15 minutes off. pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 11 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 3.7.4 shock - there shall be no evidence of physical or mechanical damage when the mated connector is subjected to transient accelerations. during and after each shock, the contacts s hall evidence no discontinuity greater than 1 microsecond. the test shall be in a ccordance with mil-std-202, method 213; the following details shall apply: (a) test condition: a (50g, 11 ms half-sine) (b) number of shocks: 3 shocks in eac h direction along three orthogonal axes (18 total) (c) mounting: see figure 5 3.7.5 vibration - there shall be no evidence of physical or mechanical damage when the mated connecto r is subjected to prolonged mechanical vibration; during the vibration along eac h axis, the contacts shall evidence no discontinuity greater than 1 microsecond. at the completion of the test, the contact resistance shall not exceed the value specif ied in table 1 (see paragraph 3.5.2). the test shall be in accordance with mil-std- 202, method 204; the following details shall apply: (a) test condition: b (+_ 15g, 10 to 2,000 hz) (b) test duration: 4 hours along each of three orthogonal axes (12 hours total) (c) mounting: see figure 5. 3.7.6 hydrogen sulfide (h 2 s) exposure - after exposure of the mated connector to a moist h 2 s atmosphere, the low level circuit resistance shall not exceed the value specified in table 1 (s ee paragraph 3.5.2). the following details shall apply: (a) test medium: 3ppm h 2 s chemically produced in a moist environment (desiccator) (b) test temperature: 40 o c (c) test duration: 48 hours pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 12 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 figure 5 rib-cage tm shock and vibration test fixture #sf 169.09 pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 13 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 3.7.7 salt spray - after exposure of the mated connector to a salt fog atmosphere, the low level circ uit resistance shall not exceed the value specified in table 1 (see paragraph 3.5.2). the test shall be in accordance with mil- std-202, method 101; the following test details shall apply: (a) salt solution: 5 percent by weight (b) test condition: b (48 hours) 3.7.8 solderability - the minimum tail length solderable on both the receptacle assemblies and headers shall be up to the standoffs on the respective housings. the test shall be similar to mi l-std-202, method 208; the following details shall apply: (a) aging: suspended 2 inches above boiling distilled water for 60 minutes. (b) acceptable coverage: 95% minimum (c) solder: 60/40 tin-lead in accordance with qq-s-571, type s (d) flux: type a, in accordance with mil-f-14256 (e) flux immersion time: terminal dipped and allowed to sit 60 seconds (f) solder dwell time: terminal held immediately above solder for 10 seconds then immersed for 3 seconds (g) solder temperature: 232 +_ 5 o c (h) number of samples: 20 3.7.9 resistance to soldering heat 3.7.9.1 wave soldering - there shall be no evidence of physical damage to the insulator when the unterminated connector or header is subjected to the high te mperature extreme imposed during wave soldering. the test shall be in accordance with mil-std-202, method 210; the following details shall apply: (a) test condition: b (10 seconds @ 260 +_ 5 o c) (b) immersion depth: to within 0.040 +_ 0.015 of insulator 3.7.9.2 ir reflow - there shall be no evidence of physical damage to the insulator when the unterminated header or connector is subjected to a maximum of 445 o f (230 o c) during the solder reflow process. pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 14 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 4.0 product qualification provisions 4.1 equipment calibration any test equipment and inspection facilities used in the performance of any test shall be maintained in a calibration system in accordance with mil-c-45662. 4.2 inspection conditions unless otherwise specified herein, all inspecti ons shall be performed under the following ambient conditions: (a) temperature: 25 +_ 5 o c (b) relative humidity: 30 to 80% (c) barometric pressure: local ambient 4.3 qualification inspection qualification inspection shall be performed on sa mple units produced with equipment normally used in production. 4.3.1 sample - qualification inspection shall be performed on twenty (24) of the largest population connec tors of the type for which qualification under this specification is desired. 4.3.2 preparation of samples 4.3.2.1 printed wiring test boards - twelve (12) test boards conforming to the applicable requirements of mil-p-55110 and mil-std-275 shall be prepared as shown in figure 6 and 7. 4.3.2.2 mating headers - twelve (12) mating headers of the appropriate population and conf iguration and conforming to the requirements of figure 2 shall be prepared. 4.3.2.3 sample mounting - twelve (12) connectors (one per board) shall be installed in, and soldered to, the test boards; a flux more active than that specified in par agraph 3.7.8 (c) may be used to ensure that the solder joint does not contribute any degradation. 4.3.2.4 sample configuration - the various test samples shall be configured as shown in table v. pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 15 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 4.3.3 test sequence - the sample connectors shall be subjected to the inspections specified in table vi in the order shown. table v - sample configuration sample no. terminated mating header required 1-2 no no 3-6 yes yes 7-8 no no 4.4 requalification testing if either of the following conditions occur, the product responsible engineer shall initiate requalification testing: 4.4.1 a significant design change is made to an existing product previously qualified under this specificat ion. a significant design change shall be defined to include, but not be limited to, c hanges in contact material composition, contact material thickness, contact fo rce, contact surface geometry, underlying material composition, underlying material thickness, insulation design, contact base material, or contact lubrication requirements. requalification testing shall consis t of all or applicable parts of t he qualification test matrix as determined by development/product, qualit y, test, and reliability engineering. pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 16 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 figure 6 .050 center through mount test pcb-type pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 17 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 figure 7 .050 center through mount test pcb-type 2 pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 18 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 19 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 20 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 table vi- development and qualifi cation test sequence selection matrix pdm: rev:m released . status: printed: nov 28, 2010
number BUS-12-087 type product specification title page revision 21 of 21 m authorized by date ribcage? ii printed wiring board connector system c. martinez 27 feb 07 classification unrestricted copyright fci form e-3334 rev f gs-01-001 revision record rev page description ec# date e 3 change para.3.5.1 to read 1.0 amperes dc for individual. 2.5 amperes dc for the total connector. v23522 11/02/92 f 3,6 1-20 3,16 rewrite para. 3.5.1. change table 1- b to 100 milliamps dc. replace ?female ? and ?male? with ?receptacle assemblies? and ?shrouded headers?. change 100-200 microinches to 200-300. delete ?hand? from 4.3.2.3. v31580 11/15/93 g 1,2,3,6,11,1 2,14-16,19 2.0 add qq-n-290 to specifications. change 3.2.1,3.2.2,3.2.3.,3.3.1,3.3.2. delete 3.5.2 & renumber. delete para.? when measured in???. change 3.7.1,3.7.2,3.7. 3 and c. change 3.7.6& 3.7.7. delete 3.7.10 and 4.4.2. update table vi v40973 06/10/94 h 9,10 3.6.4 change individual to average. change max. dim. from .0185 to .0180. v41121 07/15/94 j 3,9 3.4.1 & 3.6.2 change 4.0 ounces to 5.5. 3.6.1.2 change average to minimum. v80317 02/23/98 k all revised format to be consistent with gs-01-001, and change berg, dupont, etc. references to fci. v01904 08/01/00 l 2,3 3.2, 3.3.3 changed 200- 300 to 100 min. v11136 06/24/01 m all 1,2,3 change fci logo. add ?lf? information m08-0053 06/27/08 pdm: rev:m released . status: printed: nov 28, 2010

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