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Th e I n n ov a t iv e S wit c h Com pa n yTHE COLE SERIES S3900MINIATURE SOLDER-LUGTERMINATION ROTARY SWITCHIS DESIGNED TO PROVIDETHE ULTIMATE MECHANICALThis precision switch is designed for high and low level switching,engineered to meet the requirements of MIL-DTL-3786 and testedper MIL-STD-202 as follows: AND ELECTRICAL RELIABILITYIN INSTRUMENTATION,INDUSTRIAL CONTROLS,MEDICAL EQUIPMENT, AIRCRAFT,COMPUTERS, COMMUNICATION,WEAPONS, AND GROUNDSUPPORT ELECTRONICEQUIPMENT. THERMAL SHOCK PER MIL-STD-202; METHOD 107,TEST CONDITION “B”VIBRATION PER MIL-STD-202; METHOD 204, TESTCONDITION “B”MEDIUM SHOCK PER MIL-STD-202; METHOD 213HIGH SHOCK PER MIL-STD-202; METHOD 207MOISTURE RESISTANCE PER MIL-STD-202; METHOD 106EXPLOSION PROOF PER MIL-STD-202; METHOD 109SALT SPRAY PER MIL-STD-202; METHOD 101,CONDITION “B”The Series S3900 is available with 30 , 36 ,45 , 60 , and 90 indexing and one to six poles per deck. Self cleaning contactsare ideal for low level switching and offer low contact resistancethrough the life of the switch (25,000 cycles minimum).A hardened steel sprocket and ball bearing detent mechanismprovides smooth positive detent action and mechanical life inexcess of 100,000 cycles.Cole’s unique terminal design and sealing technique prevents fluxcontamination during wave soldering and cleaning processes.Internal plastic parts are made of fiber filled plastic to preventdegrading and interior contamination by plastic dust.S3900 SERIESMiniature Multi-Deck Solder-Lug Rotary SwitchesFinally, superior construction, in a clean room environment,ensures ultimate performance and reliability from the Cole SeriesS3900 rotary switch.The S3900 Series meets or exceedsapplicable requirements of MILDTL-3786/39 Style SR39.Certified test reports available on request.The full QPL’d MIL switch is commercially available, as are all theseconfigurations: Shaft dia .125” ferrule dia .250” screwdriver (page 3) Shaft dia .250” ferrule dia .375” screwdriver (page 4) Shaft dia .125” ferrule dia .250” (page 3) Shaft dia .250” ferrule dia .375” (page 4) Concentric Shaft (page 7) Add-A-Potentiometer (page 8)SPEC SHEET REVISION: F – 042122

S3900 SERIESS3900 Series/Page 2Miniature Multi-Deck Solder-Lug Rotary SwitchesS3900 Screwdriver – .125 Shaft Diameter(See Page 3)S3900 Screwdriver – .250 Shaft Diameter(See Page 4)S3900 Standard – .125 Shaft Diameter(See Page 3)S3900 Standard – .250 Shaft Diameter(See Page 4)NOTES:S3900 Standard – .125 Shaft Dia., .250 Ferrule Dia., .688 Body Dia., (See Page 3).S3900 Screwdriver – .125 Shaft Dia., .250 Ferrule Dia., 0.688 Body Dia., (See Page 3).S3900 Standard – .250 Shaft Dia., .375 Ferrule Dia., .688 Body Dia., Panel Seal, (See Page 4).S3900 Screwdriver – .250 Shaft Dia., .375 Ferrule Dia., 0.688 Body Dia., Panel Seal, (See Page 4).2650 South Croddy WayPhone: 714.556.3100P.O. Box 25063Fax: 714.241.9061Santa Ana, CA 92799-5063 Email: 1 CERTIFIED 2020 Cole Instrument Corp. All rights reserved. F – 042122PAGE2

S3900 SERIESS3900 Series/Page 3Miniature Multi-Deck Solder-Lug Rotary SwitchesS3900 SERIES FEATURES: Flux contamination free. MIL-DTL-3786 Qualified. 1 Amp. power switching. 100,000 plus operation life cycle. Ball bearing-smooth detent indexing. Constant low contact resistance. Rugged, high impact construction.S3900 SERIES.125 SHAFT DIAGRAMNOTES1. Dimensions are in inches.2. Unless otherwise specified, tolerances are .005 and 2 on angles (Non-accumulative).3. Shaft flat opposite position being made.4. Add .220 to the length for each additional deck.5. For switches with more than 5 decks the stud projection is .312 plus.6. If more than 12 decks or 48 poles are required, contact the factory.7. Switches are provided with full circle of terminals, regardless of the number of active positions.8. A .432 dimension, non-turn washer is available for .250 shaft dia. upon request.2650 South Croddy WayPhone: 714.556.3100P.O. Box 25063Fax: 714.241.9061Santa Ana, CA 92799-5063 Email: 1 CERTIFIED 2020 Cole Instrument Corp. All rights reserved. F – 042122PAGE3

S3900 SERIESS3900 Series/Page 4Miniature Multi-Deck Solder-Lug Rotary SwitchesS3900 SERIES.250 SHAFT DIAGRAMNOTES1. Dimensions are in inches.2. Unless otherwise specified, tolerances are .005 and 2 on angles (Non-accumulative).3. Shaft flat opposite position being made.4. Add .220 to the length for each additional deck.5. For switches with more than 5 decks the stud projection is .312 plus.6. If more than 12 decks or 48 poles are required, contact the factory.7. Switches are provided with full circle of terminals, regardless of the number of active positions.8. A .432 dimension, non-turn washer is available for .250 shaft dia. upon request.ORDERING INFORMATIONMULTIDECK SWITCHESAdd the total number of deck required as a dash No. afterthe part number.SAMPLE CODES39 45 - 2 04 03 SShorting Decks(Omit for non-shorting)Number of DecksNumber of Positions per PoleNumber of PolesDegree Between PositionsCole Basic Switch NumberOPTIONSThe following options can be added to the standard switch.When ordering, simply add the letters after the basicpart number. Options listed in alphabetical order only.A Adjustable stops.F Fixed stop between the first and last position on whenmaximum switch positions are selected.G RFI-EMI shielding.P Panel and shaft seals.Q 1/4 dia. Shaft (Omit for 1/8 Dia. Shaft)S Shorting type switch. (Available in allconfigurations. Omit for non-shorting).SD Screwdriver slot.T Pre-Tinned Terminals.Y Optional .432 Non-Turn Washer.Z Mounting Bushing Washer.Switch shown in the sample code is 45 indexing, 2 pole per deck,4 positions per pole, 3 decks, with shorting type contacts.Can be ordered as QPL Part No. M3786/39-XXXWhile ordering information is provided, we encourage you to contact Cole for assistance creating a part number.2650 South Croddy WayPhone: 714.556.3100P.O. Box 25063Fax: 714.241.9061Santa Ana, CA 92799-5063 Email: 1 CERTIFIED 2020 Cole Instrument Corp. All rights reserved. F – 042122PAGE4

S3900 SERIESS3900 Series/Page 5Miniature Multi-Deck Solder-Lug Rotary SwitchesS3900 Series – Typical FeaturesSCHEMATIC DIAGRAM(VIEWED FROM SHAFT END AND SHOWN IN POSITION #1)30 INDEXING1 POLE/DECK2 POLES/DECK4 POLES/DECK6 POLES/DECK1 POLE/DECK2 POLES/DECK3 POLES/DECK36 INDEXING45 INDEXING1 POLE/DECK2 POLES/DECK4 POLES/DECK1 POLE/DECK2 POLES/DECK3 POLES/DECK60 INDEXING90 INDEXING1 POLE/DECK2 POLES/DECK2650 South Croddy WayPhone: 714.556.3100P.O. Box 25063Fax: 714.241.9061Santa Ana, CA 92799-5063 Email: 1 CERTIFIED 2020 Cole Instrument Corp. All rights reserved. F – 042122PAGE5

S3900 SERIESS3900 Series/Page 6Miniature Multi-Deck Solder-Lug Rotary SwitchesTypical FeaturesINTERNAL TOOTHLOCK-WASHERHEX-NUTMOUNTING BUSHING WASHER3/8 FERRULE SIZEMOUNTING BUSHING WASHER1/4 FERRULE SIZEKEY WASHERS3/8 FERRULE SIZEFLATTEDFERRULERECOMMENDED PANEL CUTOUT3/8 FERRULE SIZERECOMMENDED PANEL CUTOUT1/4 FERRULE SIZELife ExpectancyVOLTAGE 30 VDCINDUCTIVE(250 MILLIHENRIES)VOLTAGE 115 VACOR 30 VDCRESISTIVEData determined from life tests at 25 C, 68% relative humidity at sea level. One cycle is a rotation of 360 and back to postion 1.Based on life-limiting criteria specified in Technical Data.2650 South Croddy WayPhone: 714.556.3100P.O. Box 25063Fax: 714.241.9061Santa Ana, CA 92799-5063 Email: 1 CERTIFIED 2020 Cole Instrument Corp. All rights reserved. F – 042122PAGE6

S3900 SERIESS3900 Series/Page 7Miniature Multi-Deck Solder-Lug Rotary SwitchesS3900 Special – Concentric ShaftINTERNAL TOOTH WASHERHEX-NUT3/8-32UNEF-2BKEY WASHER3/8-32UNEF-2ATHREAD.250 DIA. .001-.0020.562 .01031946.125 DIA. .001-.002PANEL SEAL (WHEN APPLICABLE)C/LSide View .020.250 .020.250 .020.375SECTIONSECTION"B""A"CONTROLLED BY CONTROLLED BY.125 DIA. SHAFT.250 DIA. SHAFT .020.375.312DIM. "D"(CONTACTFACTORY)DIM. "C" .050(CONTACT FACTORY)BUSHING KEYWAY.066 .002 WIDE.036 .003 DEEPFROM .375 DIA.2319463C/L0.094 .005SHAFT'S FLATOPPOSITEPOSITION MADEC/L OFPOS. #1B 2 TYP.Front View2650 South Croddy WayPhone: 714.556.3100P.O. Box 25063Fax: 714.241.9061Santa Ana, CA 92799-5063 Email: sales@cole-switches.com4A 1 TYP.7 6C2A 1 TYP.980.687 DIA. .0151 12 11C110C/L OFPOS. #1C/L5 .004.219C/L.750 DIA.C/L.062 DIA. .015 TYP.HOLE THRURear Viewwww.cole-switches.comISO9001 CERTIFIED 2020 Cole Instrument Corp. All rights reserved. F – 042122PAGE7

S3900 SERIESS3900 Series/Page 8Miniature Multi-Deck Solder-Lug Rotary SwitchesS3900 Special – Add-a-PotHEX-NUT3/8-32UNEF-2BINTERNAL TOOTH WASHERKEY WASHERPANEL SEAL (WHEN APPLICABLE)3/8-32UNEF-2ATHREAD0.250 .001-.002C/L0.122 .0050.562C/L .0100.018 .005319460.125 .001-.0020.250 .0200.250 .0200.375 .0200.375 .0200.3120.063 .0050.140 .0620.725 0.050Side View0.575 0.020BUSHING KEYWAY.066 .002 WIDE.036 .003 DEEPFROM .375 DIA.C/L OFPOS. #123C/L0.094 .005SHAFT'S FLATOPPOSITEPOSITION MADEC/L OFPOS. #1Front View2650 South Croddy WayPhone: 714.556.3100P.O. Box 25063Fax: 714.241.9061Santa Ana, CA 92799-5063 Email: sales@cole-switches.comB 2 TYP.4A 1 7 6C2A 1 80.687 .01591 12 11C110C/L5 .004.2190.750DIA.C/LRear View.062 DIA. .015 TYP.HOLE THRUwww.cole-switches.comISO9001 CERTIFIED 2020 Cole Instrument Corp. All rights reserved. F – 042122PAGE8

S3900 SERIESS3900 Series/Page 9Miniature Multi-Deck Solder-Lug Rotary Switches2650 South Croddy WayPhone: 714.556.3100P.O. Box 25063Fax: 714.241.9061Santa Ana, CA 92799-5063 Email: 1 CERTIFIED 2020 Cole Instrument Corp. All rights reserved. F – 042122PAGE9

per mil-std-202 as follows: thermal shock per mil-std-202; method 107, test condition "b" vibration per mil-std-202; method 204, test condition "b" medium shock per mil-std-202; method 213 high shock per mil-std-202; method 207 moisture resistance per mil-std-202; method 106 explosion proof per mil-std-202 .