High
Density
Rectangular
16 DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
Positronic Industries
connectpositronic.com
SGM SERIES
HIGH DENSITY RECTANGULAR
CONNECTORS with
FIXED CONTACTS
SGM Series connectors are high reliability, high density, rectan-
gular connectors qualified to MIL-DTL-28748 specifications. The
SGM Series offers solder cup, wrap post and straight solder ter-
mination styles, and is intermateable with Positronic SMPL and
SGMC series connectors.
Thirteen connector variants, four through 75 poles, are offered.
Contact spacing is 0.094 inch [2.39mm] between centers, and
contact diameters are 0.030 inch [0.76mm], rated to five amperes
per contact.
A complete array of mounting, locking, polarizing and shrouding
accessories is available for the SGM Series. For details, see the
High Density Rectangular Connector Accessories section.
Ideal applications for the SGM Series are where low weight
and high density are requirements. The high reliability of
“closed entry” female contacts insures numerous couplings of
the connector without substantial degradation of contact resis-
tance. SGM Series connectors are preferred for use in the
aerospace, avionics, telecommunications, instrumentation,
medical and robotics industries.
SGM SERIES TECHNICAL CHARACTERISTICS
MILITARY SPECIFICATIONS:
Qualified to MIL-DTL-28748/7 and MIL-
DTL-28748/8.
INTERNATIONAL STANDARDS:
IEC 807-1
MATERIALS AND FINISHES:
Insulator: Glass filled DAP per ASTM-D-5948 type
SDG-F. Grey color is standard, black or
green available.
Fixed Contacts: Copper alloy, 0.000015 inch [0.38
microns] gold over nickel. Other finishes
available upon request.
Hoods, Cable Adapters: Aluminum with yellow or black anodize.
Shells: Aluminum with yellow anodize or black
anodize.
Jackscrew System: Passivated stainless steel.
Polarizing Guides: Copper alloy with nickel plate or passi-
vated stainless steel.
Vibration Locks: Copper alloy with nickel plate.
MECHANICAL CHARACTERISTICS:
Fixed Contacts: Male – Size 22: 0.030 inch [0.76 mm]
diameter.
Female – “Closed entry” design for
highest reliability.
MECHANICAL CHARACTERISTICS, continued:
Contact Retention in
Insulator: 6 lbs. [26.5N] minimum.
Contact Termination: 0.037 inch [0.94 mm] internal diameter
on solder cup style contact for 22 AWG
[0.33 mm2] wire maximum. 0.025 inch
[0.64 mm] diameter for printed board
mount style contact. 0.025 inch [0.64
mm] square for wire post style contacts.
Locking Systems: Friction, vibration locks and jackscrews.
Polarization: Polarized guides, polarized shells and
jackscrew system.
Mechanical Operations: 1000 operations per IEC 512-5.
Jackscrews: Standard threads, 2-56 UNC on all
sizes, except 75 connector variant,
which uses 6-32 UNC. Metric threads,
M2X0.4 and M3X0.5 available.
ELECTRICAL CHARACTERISTICS:
Contact Current Rating
[maximum]: 5 amps.
Initial Contact Resistance: 0.012 ohms
Flash over Voltage: 2200 V.AC [rms]
Test Voltage: 1000 V.AC [rms]
Insulation Resistance
[minimum]: 5 G ohms
Clearance and Creepage
Distance [minimum]: 0.028 inch [0.71 mm]
Working Temperature: -55°C to 135°C
Working Voltage: 250 V.AC [rms]
Size 22 Contacts
Qualified to
MIL-DTL-28748
IEC Publication 807-1
Telecommunication
U.L. File #E140980
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RoHS
RoHS
Compliant
For RoHS options
see page 21.
High
Density
Rectangular
17
DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
Positronic Industries
connectpositronic.com
SGM SERIES
HIGH DENSITY RECTANGULAR
CONNECTORS with
FIXED CONTACTS
WRAP POST CONTACTS
0.625 [15.88]
0.110 [2.79]
0.590 [14.99]
0.145
[3.68]
NYLON WASHER
“CLOSED ENTRY” CONTACT
*2-56 UNC
TYP.
0.025 [0.64]
SQUARE TYP.
NYLON HEX NUT
MATERIAL: COPPER ALLOY
FINISH: 0.000015 [0.38 MICRONS]
GOLD OVER NICKEL SPECIFY CONTACT CODE
IN STEP 4 OF ORDERING
INFORMATION
SOLDER CUP CONTACTS
0.625 [15.88]
TYP.
0.590 [14.99]
TYP.
0.156
[3.96]
0.030 Ø
[0.76]
TYP.
0.148 [3.76]
TYP. 0.110 [2.79]
TYP.
0.103 [2.62]
Ø 0.078 [1.98]
TYP.
“CLOSED ENTRY”
CONTACT
0.036 Ø [0.91]
TYP. SOLDER CUP
MATERIAL: COPPER ALLOY
FINISH: 0.000015 [0.38 MICRONS]
GOLD OVER NICKEL SPECIFY CONTACT CODE
‘SC’ IN STEP 4 OF
ORDERING INFORMATION
SPECIFY CONTACT CODE
IN STEP 4 OF ORDERING
INFORMATION
MATERIAL: COPPER ALLOY
FINISH: 0.000015 [0.38
MICRONS] GOLD
OVER NICKEL
0.625 [15.88]
0.590 [14.99]
0.145 [3.68]
*2-56 UNC
TYP.
“CLOSED ENTRY”
CONTACT
0.110 [2.79]
NYLON WASHER
NYLON HEX NUT
L
0.025 Ø
[0.64]
TYP.
*M2X0.4 METRIC THREAD AVAILABLE
STRAIGHT SOLDER CONTACTS
L
CONTACT
CODE L
WW1 0.225
[5.72]
WW2 0.355
[9.02]
CONTACT
CODE L
DS3 0.093
[2.36]
DS4 0.125
[3.18]
DS5 0.156
[3.96]
DS6 0.187
[4.75]
High
Density
Rectangular
18 DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
Positronic Industries
connectpositronic.com
SGM SERIES
HIGH DENSITY RECTANGULAR
CONNECTORS with
FIXED CONTACTS
INSULATOR DIMENSIONS FOR SGM AND SMPL SERIES
MATING FACE OF FEMALE CONNECTOR OR REAR FACE OF MALE CONNECTOR
0.240
[6.10]
0.280
[7.12]
0.280
[7.12]
0.280
0.280
[7.12]
[7.12]
0.280
[7.12]
0.280
[7.12]
MALE AND FEMALE
PROFILE VIEW 4 CONTACTS
11 CONTACTS 14 CONTACTS 20 CONTACTS 26 CONTACTS
50 CONTACTS44 CONTACTS
MATERIAL: GLASS FILLED DIALLYL PHTHALATE PER ASTM-D-5948 TYPE SDG-F
34 CONTACTS29 CONTACTS
5 CONTACTS 7 CONTACTS 9 CONTACTS
0.210
[5.33]
0.562
[14.27]
0.780
[19.81]
0.482
[12.24]
0.700
[17.78] 0.780
[19.81]
0.786
[19.96]
0.531
[13.49] 0.625
[15.88]
0.880
[22.35] 1.060
[26.92]
1.344
[34.14]
1.094
[27.79] 1.032
[26.21]
1.250
[31.75]
0.390
[9.91]
0.390
[9.91]
0.390
[9.91]
1.500
[38.10]
1.281
[32.54]
1.408
[35.76]
1.625
[41.28]
1.000
[25.40]
1.250
[31.75]
0.814
[20.68]
0.562
[14.27]
0.210
[5.33]
0.210
[5.33]
0.656
[16.66]
0.875
[22.23]
0.217
[5.51]
High
Density
Rectangular
19
DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
Positronic Industries
connectpositronic.com
SGM SERIES
HIGH DENSITY RECTANGULAR
CONNECTORS with
FIXED CONTACTS
CONTACT HOLE POSITION DIMENSIONS
AND PRINTED BOARD HOLE PATTERN
MATING FACE OF FEMALE CONNECTOR OR REAR FACE OF MALE CONNECTOR
0.090
[2.29]
0.081
[2.06] 0.081
[2.06]
0.040
[1.02]
0.040
[1.02]
0.282
[7.16] 0.562
[14.27] 0.656
[16.66]
0.376
[9.55] 0.282
[7.16]
0.531
[13.49]
0.081
[2.06]
0.162
[4.11]
0.125
[3.18]
0.140
[3.56]
0.140
[3.56]
0.090
[2.29]
0.045
[1.14]
0.188
[4.78]
0.482
[12.24]
0.147
[3.73]
0.162
[4.11]
0.135
[3.43]
0.162
[4.11]
0.162
[4.11]
0.162
[4.11]
0.081
[2.06]
0.081
[2.06]
0.081
[2.06]
0.081
[2.06]
0.625
[15.88]
0.752
[19.10]
1.032
[26.21]
0.140
[3.56]
0.140
[3.56]
0.987
[25.07]
1.281
[32.54] 1.128
[28.65]
1.408
[35.76]
0.147
[3.73]
0.125
[3.18] 0.125
[3.18]
0.125
[3.18]
0.846
[21.49]
0.125
[3.18]
0.376
[9.55]
0.564
[14.33]
0.814
[20.68] 0.752
[19.10]
1.000
[25.40] 1.094
[27.79]
0.047
[1.19]
0.045
[1.14]
0.562
[14.27]
0.146
[3.70]
0.090
[2.29]
0.270
[6.86]
TYP.
TYP.
0.047
[1.19] TYP.
TYP.
0.135
[3.43] TYP.
0.135
[3.43] TYP.
0.045
[1.14]
0.047
[1.19]
TYP.
TYP. 0.047
[1.19] TYP. 0.047
[1.19] TYP.
0.045
[1.14] TYP.
0.045
[1.14] TYP.
0.047
[1.19] TYP. 0.047
[1.19] TYP.
0.047
[1.19] TYP.
0.047
[1.19] TYP.
0.047
[1.19] TYP.
0.047
[1.19] TYP.
4 CONTACTS 5 CONTACTS 7 CONTACTS 9 CONTACTS 11 CONTACTS
14 CONTACTS 20 CONTACTS 26 CONTACTS 29 CONTACTS
34 CONTACTS 44 CONTACTS 50 CONTACTS
SUGGEST 0.105 [2.66] Ø HOLES IN PRINTED BOARD FOR CONNECTOR MOUNTING HOLES
SUGGEST 0.040 [1.01] Ø HOLES IN PRINTED BOARD FOR CONTACT TERMINATIONS
High
Density
Rectangular
20 DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
Positronic Industries
connectpositronic.com
SGM SERIES
HIGH DENSITY RECTANGULAR
CONNECTORS with
FIXED CONTACTS
SGM 75 WITH SOLDER CUP CONTACTS
0.810 [20.57]
TYP.
0.192 [4.88]
TYP.
“CLOSED ENTRY”
CONTACT
*6-32 UNC
TYP.
0.036 [0.91] Ø
TYP. SOLDER CUP
0.750
[19.05]
TYP.
0.160 [4.06]
TYP.
0.103 [2.62]
0.156
[3.96]
* M3X0.5 METRIC THREAD AVAILABLE
SPECIFY CONTACT CODE ‘SC’ IN
STEP 4 OF ORDERING INFORMATION
MATERIAL: COPPER ALLOY
FINISH: 0.000015 [0.38 MICRONS]
GOLD OVER NICKEL
0.030
[0.76] Ø
SGM 75 INSULATOR DIMENSIONS
MATING FACE OF FEMALE CONNECTOR OR REAR FACE OF MALE CONNECTOR
0.310
[7.87]
0.750
[19.05]
1.680
[42.67]
1.375
[34.93]
SGM 75
SEE SGMC SERIES 75 PRINTED BOARD HOLE PATTERN PAGE 5
FOR CONNECTOR VARIANT CONTACT HOLE POSITIONS
MATERIAL: GLASS FILLED DIALLYL PHTHALATE PER ASTM-D-5948 TYPE SDG-F
High
Density
Rectangular
21
DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
Positronic Industries
connectpositronic.com
SGM SERIES
*NOTE: FOR DETAILS OF ITEMS LISTED IN STEPS 5 THROUGH
9, SEE HIGH DENSITY RECTANGULAR CONNECTOR
ACCESSORIES SECTION ON PAGES 26-34.
HIGH DENSITY RECTANGULAR
CONNECTORS with
FIXED CONTACTS
ORDERING INFORMATION - CODE NUMBERING SYSTEM
Specify Complete Connector By Selecting An Option From Step 1 Through 9
STEP 3 - CONNECTOR GENDER
M - Male Insulator
F - Female Insulator
1 2345678910
SGM 26 FSC N 0 0 J 0 /AA
11
-14
STEP 1 - BASIC SERIES
SGM Series
STEP 11 - SPECIAL OPTIONS
-14 – Signal contacts plated
0.000030 [0.76µ] gold over
nickel.
-50 – Signal contacts plated
0.000050 [1.27µ] gold over
copper.
CONTACT TECHNICAL SALES
FOR SPECIAL OPTIONS
*STEP 8 - CABLE ADAPTERS (HOODS)
J – Top opening hood offered on
all variants except 5, 11 and 75.
0 – If no hoods are required.
*STEP 6 - SHELLS
P – Male shell.
R – Female shell.
0 – If no shells are required.
*STEP 5 - POLARIZING GUIDES AND
JACKSCREW SYSTEMS
N – Polarizing guides.
NSS – Stainless steel polarizing guides.
T – Fixed jackscrews.
E – Short turnable jackscrews with knobs.
E1 – Turnable jackscrews used with hoods only. Not
offered on 75 variant.
ESS – Short turnable jackscrews.
0 – If no polarizing guides or jackscrews are required.
Also use “0” if ordering hoods equipped with
jackscrews, for 75 variant, see STEP 8.
STEP 4 - CONTACT TERMINATION TYPE
All female contacts “closed entry” design
SC – Solder cup
DS3 – Straight solder 0.093 [2.36]
not offered on 75 variant.
DS4 – Straight solder 0.125 [3.18]
not offered on 75 variant.
DS5 – Straight solder 0.156 [3.96]
not offered on 75 variant.
DS6 – Straight solder 0.187 [4.75]
not offered on 75 variant.
WW1 – Wrap post 0.225 [5.72]
not offered on 75 variant.
WW2 – Wrap post 0.355 [9.02]
not offered on 75 variant.
STEP 2 - CONNECTOR
VARIANTS
4, 5, 7, 9, 11, 14, 20, 26, 29,
34, 44, 50, 75
STEP
EXAMPLE
STEP 10 - ENVIRONMENTAL
COMPLIANCE
OPTIONS
/AA - Compliant per EU
Directive 2002/95/EC
(RoHS)
NOTE: If compliance to environ-
mental legislation is not required,
this step will not be used.
Example: SGM26FSCN00J0
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RoHS
RoHS
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*STEP 9 - ADDITIONAL FEATURES
B – For black anodized aluminum parts.
R – For yellow chromate coating on aluminum parts.
V – Lock tab, not offered on 75 variant.
VL – Lock lever, not offered on 75 variant.
0 – If no additional options are required.
M – Jackscrews with metric threads.
*STEP 7 - POLARIZATION POSITIONS OF SHELLS
Select letter to designate position of male pin or
female slot for polarization system.
A, B, C, D, E, F, G
0 – If no polarization is required or if no shells are required.
NOTE: Once you have made a connector selection, contact
Technical Sales if you would like to receive a drawing in
DXF, PDF format or a 3-dimensional IGES file.
SK Drawing 3-dimensional model
