The Cole Series S3900 miniature P.C. termination rotary switch
is designed to provide the ultimate mechanical and electrical
reliability in instrumentation, industrial controls, medical equipment,
aircraft, computers, communication, weapons, and ground support
electronic equipment.
This precision switch is designed for high and low level switching,
engineered to meet the requirements of MIL-S-3786 and tested 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; METHOD 109
• SALT SPRAY PER MIL-STD-202; METHOD 101, CONDITION “B”
The Series S3900 is available with 30°, 36° and 45° indexing and
one to six poles per deck. Self cleaning contacts are ideal for low
level switching and offer low contact resistance through the life of
the switch (25,000 cycles minimum). A hardened steel sprocket and
ball bearing detent mechanism provides smooth positive detent
action and mechanical life in excess of 100,000 cycles. Cole’s unique
terminal design and sealing technique prevents flux contamination
during wave soldering and cleaning processes. Internal plastic parts
are made of fiber filled plastic to prevent degrading and interior
contamination by plastic dust. Finally, superior construction, in a clean
room environment, ensures ultimate performance and reliability from
the Cole Series S3900 rotary switch.
S3900 SERIES
Miniature Multi-Deck Solder-Lug Rotary Switches
ISO9001 CERTIFIED
2650 South Croddy Way P.O. Box 25063 Santa Ana, California 92799-5063 USA
PHONE 714.556.3100 SALES FAX 714.241.9061 www.cole-switches.com
ISO9001 CERTIFIED
S3900 SERIES
S3900 SERIES
Miniature Multi-Deck Solder-Lug Rotary Switches
S3900 Standard – .125 Shaft Diameter
(See Page 3) S3900 Standard – .250 Shaft Diameter
(See Page 4)
S3900 Screwdriver – .250 Shaft Diameter
(See Page 4)
S3900 Screwdriver – .125 Shaft Diameter
(See Page 3)
S3900 Series/Page 2
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 Way P.O. Box 25063 Santa Ana, California 92799-5063 USA
PHONE 714.556.3100 SALES FAX 714.241.9061 www.cole-switches.com
ISO9001 CERTIFIED
S3900 SERIES
S3900 SERIES
Miniature Multi-Deck Solder-Lug Rotary Switches
S3900 Series/Page 3
S3900 SERIES FEATURES:
• Flux contamination free. • Ball bearing-smooth detent indexing.
• MIL-S-3786 Qualied. • Constant low contact resistance.
• 1 Amp. power switching. • Rugged, high impact construction.
• 100,000 plus operation life cycle.
NOTES
1. Dimensions are in inches.
2. Unless otherwise specied, tolerances are ±.005 and ±2° on angles (Non-accumulative).
3. Shaft at opposite position being made.
4. Add .218 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.
S3900 SERIES
.125 SHAFT DIAGRAM
2650 South Croddy Way P.O. Box 25063 Santa Ana, California 92799-5063 USA
PHONE 714.556.3100 SALES FAX 714.241.9061 www.cole-switches.com
ISO9001 CERTIFIED
S3900 SERIES
S3900 SERIES
Miniature Multi-Deck Solder-Lug Rotary Switches
S3900 Series/Page 4
ORDERING INFORMATION
MULTIDECK SWITCHES
Add the total number of deck required as a dash No. after
the part number.
SAMPLE CODE
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-XXX
OPTIONS
The following options can be added to the standard switch.
When ordering, simply add the letters after the basic
part number. Options listed in alphabetical order only.
A = Adjustable stops.
F = Fixed stop between the rst and last position on
a full turn switch.
G = RFI-EMI shielding.
L = Dry circuit (low level).
P = Panel and shaft seals.
Q = 1/4 dia. Shaft (Omit for 1/8 Dia. Shaft)
S = Shorting type switch. (Available in all
congurations. Omit for non-shorting).
SD = Screwdriver slot.
T = Pre-Tinned Terminals.
Y = Optional .432 Non-Turn Washer.
Z = Mounting Bushing Washer.
Shorting Decks
(Omit for non-shorting)
Number of Decks
Number of Positions per Pole
Number of Poles
Degree Between Positions
Cole Basic Switch Number
S39 45 - 2 04 03 S
NOTES
1. Dimensions are in inches.
2. Unless otherwise specied, tolerances are ±.005 and ±2° on angles (Non-accumulative).
3. Shaft at opposite position being made.
4. Add .218 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.
S3900 SERIES
.250 SHAFT DIAGRAM
2650 South Croddy Way P.O. Box 25063 Santa Ana, California 92799-5063 USA
PHONE 714.556.3100 SALES FAX 714.241.9061 www.cole-switches.com
ISO9001 CERTIFIED
S3900 SERIES
S3900 SERIES
Miniature Multi-Deck Solder-Lug Rotary Switches
S3900 Series/Page 5
S3900 Series – Typical Features
SCHEMATIC DIAGRAM
(VIEWED FROM SHAFT END AND SHOWN IN POSITION #1)
36°
INDEXING
30°
INDEXING
45°
INDEXING
60°
INDEXING
90°
INDEXING
1 POLE/DECK 2 POLES/DECK
3 POLES/DECK
4 POLES/DECK 6 POLES/DECK
1 POLE/DECK 2 POLES/DECK
1 POLE/DECK 2 POLES/DECK 4 POLES/DECK
1 POLE/DECK 2 POLES/DECK
1 POLE/DECK 2 POLES/DECK
3 POLES/DECK
2650 South Croddy Way P.O. Box 25063 Santa Ana, California 92799-5063 USA
PHONE 714.556.3100 SALES FAX 714.241.9061 www.cole-switches.com
ISO9001 CERTIFIED
S3900 SERIES
S3900 SERIES
Miniature Multi-Deck Solder-Lug Rotary Switches
S3900 Series/Page 6
INTERNAL TOOTH
LOCK-WASHER
HEX-NUT
KEY WASHERS
3/8 FERRULE SIZE
MOUNTING BUSHING WASHER
1/4 FERRULE SIZE
MOUNTING BUSHING WASHER
3/8 FERRULE SIZE
VOLTAGE 115 VAC
OR 30 VDC
RESISTIVE
VOLTAGE 30 VDC
INDUCTIVE
(250 MILLIHENRIES)
Data 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 specied in Technical Data.
RECOMMENDED PANEL CUTOUT
1/4 FERRULE SIZE
RECOMMENDED PANEL CUTOUT
3/8 FERRULE SIZE
Typical Features
FLATTED
FERRULE
Life Expectancy
2650 South Croddy Way P.O. Box 25063 Santa Ana, California 92799-5063 USA
PHONE 714.556.3100 SALES FAX 714.241.9061 www.cole-switches.com
ISO9001 CERTIFIED
S3900 SERIES
S3900 SERIES
Miniature Multi-Deck Solder-Lug Rotary Switches
S3900 Series/Page 7
INTERNAL TOOTH WASHER
PANEL SEAL (WHEN APPLICABLE)
±.020
C/L
C/L
±.020
.375.375
±.020 .312
±.020
.250
.250
31946
±.004
.219
FROM .375 DIA.
.036±.003 DEEP
.066±.002 WIDE
C/L OF
POS. #1
BUSHING KEYWAY
3/8-32UNEF-2B
THREAD
3/8-32UNEF-2A
HEX-NUT
KEY WASHER
C/L
31946
POS. #1
C/L OF
3
12
1
C1
2
.750 DIA.
4
7
6
5
C2
C/L
10
11
9
8
SHAFT'S FLAT
OPPOSITE
POSITION MADE
0.094
±.005
0.687 DIA.
±.015
0.562
±.010
.062 DIA.±.015 TYP.
HOLE THRU
SECTION
"A"
CONTROLLED BY
.250 DIA. SHAFT
SECTION
"B"
CONTROLLED BY
.125 DIA. SHAFT
DIM. "C"
±.050
(CONTACT FACTORY)
DIM. "D"
(CONTACT
FACTORY)
B°±2° TYP.
A°±1° TYP.
C/L
A°±1° TYP.
.250 DIA.
+.001
-.002
.125 DIA.
+.001
-.002
S3900 Special – Concentric Shaft
Side View
Rear View
Front View
2650 South Croddy Way P.O. Box 25063 Santa Ana, California 92799-5063 USA
PHONE 714.556.3100 SALES FAX 714.241.9061 www.cole-switches.com
ISO9001 CERTIFIED
S3900 SERIES
S3900 SERIES
Miniature Multi-Deck Solder-Lug Rotary Switches
S3900 Series/Page 8
S3900 Special – Add-a-Pot
KEY WASHER
PANEL SEAL (WHEN APPLICABLE)
INTERNAL TOOTH WASHER
C/L
C/L
31946
FROM .375 DIA.
.036±.003 DEEP
.066±.002 WIDE
BUSHING KEYWAY
.219
±.004
C/L OF
POS. #1
HEX-NUT
3/8-32UNEF-2A
3/8-32UNEF-2B
THREAD
8
11
POS. #1
C/L OF
C1
1
2
12
C/L
5
3
4
6
7
C2
C/L
10
9
SHAFT'S FLAT
OPPOSITE
POSITION MADE
0.094
±.005
0.687
±.015
0.562
±.010
0.122
±.005
0.125+.001
-.002
0.250+.001
-.002
0.250
±.020
0.250
±.020 0.140
±.062
0.018
±.005
0.063
±.005
0.375
±.020
0.375
±.020 0.312 0.725±0.050 0.575±0.020
0.750
DIA.
.062 DIA.
±.015 TYP.
HOLE THRU
A°±1°
B°±2°
TYP.
A°±1°
C/L
Side View
Rear View
Front View
2650 South Croddy Way P.O. Box 25063 Santa Ana, California 92799-5063 USA
PHONE 714.556.3100 SALES FAX 714.241.9061 www.cole-switches.com
ISO9001 CERTIFIED
S3900 SERIES
S3900 SERIES
Miniature Multi-Deck Solder-Lug Rotary Switches
S3900 Series/Page 9