Circular Connectors – PCB Contacts - Amphenol Aerospace

Circular Connectors – PCB ContactsAlternate Positioning for MIL-DTL-38999AmphenolAerospaceTo avoid cross-plugging problems in applications requiring the use of more than one connector of the same series, sizeand arrange ment, alternate rotations are available as indicated in the accompanying charts.In MIL-DTL-38999 Series I, II and III connectors the rotation is based on rotating the master key/keyway in theconnector shell.A plug with a given rotation letter will mate with a receptacle with the same rotation letter. Only the master key/keyway rotatesin the shell, and the insert always remains in the same position relative to the minor keys. Refer to diagrams belowfor each connector series.LJT (MIL-DTL-38999 Series I) KEY/KEYWAY ROTATIONAB ANGLE OF ROTATION (Degrees)ShellSize Normal° A° B° C° D°9 95 77 – – 11311 95 81 67 123 10913 95 75 63 127 11515 95 74 61 129 11617 95 77 65 125 11319 95 77 65 125 11321 95 77 65 125 11323 95 80 69 121 11025 95 80 69 121 110JT (MIL-DTL-38999 Series II) KEY/KEYWAY ROTATIONAB ANGLE OF ROTATION (Degrees)ShellSize Normal° A° B° C° D°8 100 82 – – 11810 100 86 72 128 11412 100 80 68 132 12014 100 79 66 134 12116 100 82 70 130 11818 100 82 70 130 11820 100 82 70 130 11822 100 85 74 126 11524 100 85 74 126 115Tri-Start (MIL-DTL-38999 Series III) KEY/KEYWAY ROTATIONShellSize911, 13,and 1517 and1921, 23,and 25Key & KeywayArrangementIdentification LetterAR°BSCBR°BSCCR°BSCDR°BSCN 105 140 215 265A 102 132 248 320B 80 118 230 312C 35 140 205 275D 64 155 234 304E 91 131 197 240N 95 141 208 236A 113 156 182 292B 90 145 195 252C 53 156 220 255D 119 146 176 298E 51 141 184 242N 80 142 196 293A 135 170 200 310B 49 169 200 244C 66 140 200 257D 62 145 180 280E 79 153 197 272N 80 142 196 293A 135 170 200 310B 49 169 200 244C 66 140 200 257D 62 145 180 280E 79 153 197 272AB5 ˚LJT REFAB10 ˚JT REFBR˚BSCDR˚BSCNORMALBA D CNORMALBA D CAR˚BSCCR˚BSCMAINKEYWAYROTATIONLETTERSRELATIVE POSSIBLE POSITIONOF ROTATED MASTER KEYWAY(front face of LJT connector receptacle shown)ROTATIONLETTERSRELATIVE POSSIBLE POSITIONOF ROTATED MASTER KEYWAY(front face of JT connector receptacle shown)RELATIVE POSSIBLE POSITIONOF ROTATED MASTER KEYWAY(front face of Tri-Startconnector receptacle shown)mIL-DTL-38999Series I LJT & Series II JTCONNECTORS ALTERNATEROTATION CROSS-REFERENCE LETTERSPins inAlternateRotationsPA = EPB = RPC = WPD = YSockets inAlternateRotationsSA = FSB = TSC = XSD = ZExplanation:Use P at end of part numberfor pin contacts in Normalposition. Use S at end ofpart number for socketcontacts in Normal position.Use cross-reference lettersgiven in chart above foralternate rotations.MIL-DTL-38999 SERIES III,TRI-START CONNECTORSALTERNATE ROTATIONCROSS-REFERENCELETTERSPins inAlternateRotationsPA = GPB = IPC = KPD = MPE = RSockets inAlternateRotationsSA = HSB = JSC = LSD = NSE = TExplanation:Use P at end of part numberfor pin contacts in Normalposition. Use S at end ofpart number for socketcontacts in Normal position.Use cross-reference lettersgiven in chart above foralternate rotations.38999IIIHDDualokIIISJTAccessoriesAquaconHerm/SealPCBHighSpeedFiberOpticsContactsConnectorsCablesEMI FilterTransient26482Matrix 283723 IIIMatrix|Pyle26500Pyle5015Crimp RearReleaseMatrix22992Class LBack-ShellsOptionsOthersContact Amphenol Aerospace for more information at 800-678-0141 • www.amphenol-aerospace.com147