
Microminiature D Connectors
MCDM Series Metal Shell Connectors
25
Catalog 1308638
Dimensions are in inches and
Dimensions are shown for
USA: 1-800-522-6752
South America: 55-11-3611-1514
Revised 8-05
millimeters unless otherwise
reference purposes only.
Canada: 1-905-470-4425
Hong Kong: 852-2735-1628
specified. Values in brackets
Specifications subject
Mexico: 01-800-733-8926
Japan: 81-44-844-8013
www.tycoelectronics.com
are metric equivalents.
to change.
C. America: 52-55-5-729-0425
UK: 44-141-810-8967
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1
Performance
Contact Resistance — The average
mated contact resistance is 4 milliohms,
with a maximum value of 8 milliohms,
using standard #24 solid copper leads
when measured directly behind the
crimp joints of the mated pin and socket
100 microvolts is 4.8 milliohms.
Dielectric Withstanding Voltage
(60 Hz rms room temperature) —
Solder Pots: 600 VAC at sea level;
150 VAC at 70,000 feet [21,336 m].
Wire Terminations: 750 VAC at sea level;
200 VAC at 70,000 feet [21,336m]
Vibration (Per MIL-STD-202C,
Method 204-A, Condition D) — No
discontinuity in excess of 1 microsecond
during twelve 20 minute sweeps from 10
to 2,000 CPS at .06 double amplitude or
20 G forces, whichever is less.
Corrosion Resistance (Per
MIL-STD-202C, Method 101B,
Condition B) — Both mated and
unmated samples do not exceed the
maximum allowable contact resistance
(8 milliohms) when subjected to the
48 hour salt spray test.
Durability — The contact resistance
after 500 mating cycles is less than the
maximum allowable, 8 milliohms.
Insulation Resistance —
Greater than 5,000 megohms at room
temperature for the materials listed
under “Materials”.
Maximum Current Carrying
Capacity — No. 24 contact, 3
amperes. It must be recognized,
however, that all the wires to a connector
will not carry their maximum current
under all environmental conditions due
to wire temperature.
Contact Engaging and Separation
Forces — 6 oz. [1.67N] maximum
(eng.); 0.5 oz. [.14N] minimum (sep.).
Temperature Range (Operating) —
Diallyl phthalate -67°F to 257°F
[-55°C to +125°C].
Materials
Insulator — Diallyl phthalate per
MIL-M-14, Type SDG-F or Liquid
Crystal Polymer (LCP) per ASTM
D5138.
Contacts — Pin Contact: Copper alloy
and beryllium copper alloy make up the
complete construction. Socket Contact:
Copper alloy.
Body Shell — High grade aluminum
alloy.
Finishes
Contacts — Standard finish is
0.000050 [0.00127] gold over copper
flash per MIL-G-45204, Type II.
Body Shell — Electroless nickel per
AMS 2404.
Note:
Insulators are molded into their metal
shells — No bonded joint is used.
Technical & Performance
Data
The only metal shell con-
nector that mates with all
existing plastic types. This
line is ideal for external use
and other applications
requiring frequent discon-
nect and remating. When
durability and reliability are
paramount the metal shell
connector is unsurpassed —
it eliminates the need for
retrofitting where new metal
shell varieties must mate
with older plastic types.
Originally designed for mili-
tary applications, they are
currently used for commer-
cial requirements, including
computers.
Screw Mount
B
C
A
F
E
D
A
F
Contact #1
Pin
Contact #1
Socket
Pin
Socket
.089–.094
[2.26–2.39]
.093
[2.36]
D
Dia.
2 Plcs.
.089–.094
[2.26–2.39]
Dia.
.193
[4.90]
.379
[9.63]
.180
[4.57]
.365
[9.27]
.798
[20.27]
B
.093
[2.36]
E