Positronic Industries
connectpositronic.com
RECTANGULAR CONNECTORS
WITH FIXED
SOLDER CONTACTS
S
tandard
D
ensity
R
ectangular
Size 20 Contacts
Qualified to
MIL-DTL-28748
IEC Publication 807-6
U.L. Recognized
File #E49351
IT
POS
Di
rec
tive
2002
/9
45
DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
5/
Compliant
EC
•
GM SERIES
GM Series connectors are multi-pole, high reliability con-
nectors qualified to MIL-DTL-28748 specifications. Contacts
are 0.040 inch [1.02mm] diameters, rated to 7.5 amperes per
contact. Termination styles are solder cup and straight solder
printed board mount. Eleven connector variants, seven
through 50 poles, are offered.
A wide array of mounting, locking, shrouding and polarizing
accessories is available for this series. For details, see the
Heavy-Duty Rectangular Connector Accessories section.
The GM Series is a popular choice of engineers in all areas
of electronics and is widely utilized in navigational systems,
robotics, mainframe and peripheral computers, medical
equipment, telecommunications, instrumentation and process
control applications.
GM Series connectors may not be mateable with GMCT
Series connectors and contacts, contact Technical Sales.
GM SERIES TECHNICAL CHARACTERISTICS
MILITARY SPECIFICATIONS:
Qualified to MIL-DTL-28748/5 and MIL-
DTL-28748/6.
MECHANICAL CHARACTERISTICS:
Male
- Size 20: 0.040 inch [1.02 mm
2
]
diameter.
Female
- Open entry is standard.
“Closed entry” available on solder cup
style for high reliability applications.
Contact Retention in Insulator:
10 lbs. [44.5N] minimum.
Contact Termination:
0.046 inch [1.17 mm] internal diameter
on solder cup style contact for 20 AWG
[0.5 mm
2
] wire maximum.
0.025 inch [0.64 mm] diameter printed
board mount style contact.
Fixed Contacts:
Locking Systems:
Polarization:
Mechanical Operations:
Jackscrews:
Friction, vibration locks and jackscrews.
Polarized guides, polarized shells and
jackscrew system.
With “closed entry” female contacts, 500
operations per IEC 512-5.
Standard threads, 6-32 UNC. Metric
threads, M3X0.5 available.
INTERNATIONAL STANDARDS:
IEC 807-6.
U.L. Recognized.
MATERIALS AND FINISHES:
Insulator:
Glass filled DAP per ASTM-D-5948 type
SDG-F. Grey color is standard, black
available.
Solder
- Copper alloy, gold flash over nickel.
Printed Board Mounted
- Copper alloy,
gold flash over nickel.
Military
- Copper alloy, 0.000050 inch [1.27
microns] gold over nickel. Other finishes
available upon request.
Aluminum with yellow or black anodize.
Aluminum with yellow or black anodize.
Passivated stainless steel.
Copper alloy with nickel plate or passi-
vated stainless steel.
Copper alloy with zinc plate and chro-
mate seal.
Fixed Contacts:
Hoods, Cable Adapters:
Shells:
Jackscrew System:
Polarizing Guides:
Vibration Locks:
ELECTRICAL CHARACTERISTICS:
Contact Current Rating
(maximum):
7.5 amps.
Initial Contact Resistance:
0.010 ohms.
Flash over Voltage:
Test Voltage:
Insulation Resistance
(minimum):
Clearance and Creepage
Distance (minimum):
Working Temperature:
Working Voltage:
2500 V.AC [rms].
1200 V.AC [rms].
5 G ohms.
0.047 inch [1.19 mm].
-55°C to 125°C.
300 V.AC [rms].
RoHS
R
O
NIC
INDU
S
TR
IES
For RoHS options
see page 50.
r
•
pe
EU
S
tandard
D
ensity
R
ectangular
RECTANGULAR CONNECTORS
WITH FIXED
SOLDER CONTACTS
SOLDER CUP CONTACTS
Positronic Industries
connectpositronic.com
ON A MALE CONNECTOR, THE FEMALE
GUIDE OR JACKSCREW IS LOCATED AT
CONTACT POSITION A
CONTACT MATERIAL: COPPER ALLOY
CONTACT FINISH: GOLD FLASH OVER
NICKEL
“CLOSED ENTRY” FEMALE CONTACT
AVAILABLE
SPECIFY CODE “CE” IN STEP 10 OF
ORDERING INFORMATION
0.046
[1.17] Ø
0.188 [4.78]
0.200
[5.08]
0.040
[1.02] Ø
Typical Part Number: GM14FSCN0000
Typical Part Number: GM14MSCN0000
STRAIGHT SOLDER CONTACTS FOR PRINTED BOARD MOUNT
NYLON WASHER TYP.
CONTACT MATERIAL: COPPER ALLOY
CONTACT FINISH: GOLD FLASH OVER
NICKEL
L
0.025
[0.64] Ø
CONTACT
CODE
DS3
DS4
DS5
DS6
L
0.093
[2.36]
0.125
[3.18]
0.156
[3.96]
0.187
[4.75]
Typical Part Number: GM34FDS5T0000
SEE GM SERIES PRINTED BOARD HOLE PATTERN PAGE FOR
CONNECTOR VARIANT CONTACT HOLE POSITIONS
SPECIFY CONTACT CODE IN STEP 4 OF
ORDERING INFORMATION FOR DESIRED
LENGTH OF CONTACT TERMINATION
TYPICAL MATING ASSEMBLY
GM9FSCT0000
GM9MSCE0000
DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
46
GM SERIES
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