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
Rectangular Connectors
42
MCEM Series Metal Shell Edgeboard Connectors
Metal Shell Edge Board
Connectors
nMeets MIL-DTL-55302
performance requirements
nLayouts 128 and 184 are QPL
to slash sheets 120, 121,
122 and 123
nConnectors are available in
40, 44, 80, 110, 128, 152,
and 184 positions
nUtilizes low force twist pins
and our low force sockets.
Mating forces in the 3 to 4
oz. [.83 to 1.11N] range per
contact are typical with low
force pin and low force
socket
nDesigned for surface
mounting and through-the-
boardmounting
nAvailable termination
nMother board (pin side) —
cactus bend
nDaughter board (socket
side) — coke bottle,
right-angle bend to “A”
or “B” side
nSolder pots, and variety
of other wire terminations
for pin and socket
connectors available at
customer’srequest
nTwo hexagonal polarizing
keys (per MIL-DTL-55302
slash sheet 124) are
provided. Jackscrew
hardware is available. For
programmable keying/
jacking modifications
consult Tyco Electronics
In addition to the plastic
versions of the 2 piece
edgeboardconnectors, a
metal shell assembly is
designed and tooled. The
metal shells are made of
aluminum alloy per QQ-A-
591. The insertmaterial is
Diallyl phthalate,
Polyphenylene sulfide
(Ryton) or Liquid Crystal
Polymer (LCP). The techni-
cal and performance data is
essentially the same as that
shown for the MCDM Series
on page 25. These are
rugged, durable connectors
and are ideal for use in
areas of high density pack-
aging and wherefrequent
connect and disconnects
are required. Designed
initially for applications in
airborne data recorders,
computers and associated
equipment in navigational
systems. The mother board
connector can be ordered
to fit any patternon the
circuit board. The units can
also be provided with con-
tacts on .100 [2.54] spacing
which results in .100 [2.54]
grid pattern.
Performance Data
Electrical
Contact Resistance —The average
mated contact resistance is 4 milliohms,
with a maximum value of 8 milliohms.
The average resistance value at 100
microvolts is 4.8 milliohms.
Dielectric Withstanding Voltage —
800 VAC RMS at sea level (600 for
solder pots); 200 VAC RMS at 70,000
feet [21,336m] (150 for solder pots).
Durability —Less than the maximum
allowable, 8 milliohms after 500 mating
cycles.
Insulation Resistance — Greater than
5,000 megohms at room ambient tem-
perature.
Maximum Current Carrying
Capacity —No. 24 contact 3 amperes.
Mechanical
Contact Engaging & Separation
Forces —5.0 oz. max. [1.39N] (eng.),
0.5 oz. min. [.14N] (sep.).
Environmental
Temperature Range —
-67°F to 302°F [-55° C to +150°C] for
Diallyl Phthalate; -67°F to 257°F [-55°
Cto +125°C] for Polyphenylene Sulfide.
Vibration —No discontinuity in
excess of 1 µ sec. during twelve 20
minute sweeps from 10 to 2000 CPS at
.06 double amplitude or 20 G forces,
whichever is less.
Materials and Finish
Shells —High grade aluminum alloy,
electroless nickel plated per AMS 2404.
Insulator —Diallyl Phthalate per MIL-
M-14, Type SDG-F (for 128 & 184);
Polyphenylene Sulfide per MIL-M-
24519 (for 40, 44, 80, 110 & 152), or
Liquid Crystal Polymer per ASTM
D5138.
Contacts —Pin (low force): beryllium
and OFHC copper,gold plated. Socket
(low force): Copper alloy,gold plated.
Hardware —Corrosion resistant
stainless steel passivated.
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
Rectangular Connectors
43
Rectangular
Connectors
2
MCEM Series Metal Shell Edgeboard Connectors (Continued)
Mother Board (Pin Side)
40, 44, 80, 110 &
128
Positions
No. of AB
Contacts ± .010 ± .005
[± .254] [± .127]
40 1.750 1.500
44.45 38.10
44 1.850 1.600
46.99 40.64
80 2.750 2.500
69.85 63.50
110 3.500 3.250
88.90 82.55
128 3.950 3.700
100.33 93.98
Note: For PC Boards of different widths, consult
Tyco Electronics.
Dimensions for .062 [1.57] PC Board
Items in bold italic are qualified to MIL-DTL-55302.
Configuration shown is per MIL-DTL-55302/120.
Section A-A
.325–.375
[8.26–9.53] Typ.
.260–.300
[6.60–7.62] Typ.
Polarizing Key Location
2 Plcs.
#2-56 UNC-2B Thd.
Pin Contact/Lead Assy.
Insulator Assy.
Epoxy
25 AWG Copper
Wire, Gold Plated,
Solder Dipped
Hex Polarizing Key
2 Supplied (Loose Packed)
A
A
A
B
.400
[10.16]
.050
[1.27]
.050
[1.27] .250
[6.35]
Ø .091–.098
[2.31–2.49]
.100
[2.54] Typ.
Typ.
.075
[1.91]
Typ.
.075
[1.91]
Typ.
.050
[1.27] Typ.
B4
B3
A1
A2
A3
A4
B2
B1
Thru
2 Plcs.
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
Rectangular Connectors
44
MCEM Series Metal Shell Edgeboard Connectors (Continued)
Daughter Board
(Socket Side)
40, 44, 80, 110 &
128
Positions
MCE M1 128 L 6 L 4 0.5Lead Length in Inches (min.)
Z — Wire layout as illustrated.
Insulation Color or Finish
1 — All white wire 4 — Gold plated 7— Color coded per
2— All yellow wire 5—Tin dipped gold plated MIL-STD-681, System 1
3— All gray wire 6—Bare (unfinished) 8—Special color code
9—Ten solid color repeating
(starts with black)
Wire Size
4–24 AWG 5–25AWG 6–26 AWG 8–28 AWG 0–30AWG
Connector Series
Material
M1 — Metal Shell
Layout
40, 44, 80,110,128,152, 184
Contact Type
L—Low ForcePin (Mother BoardConnector)
SL — Low ForceSocket* (Daughter BoardConnector)
X—Special,does not fit description below.
S—Solder pots for 26 AWG max.
Wire Type
*A — TypeE,7strand *D — TypeET, 19strand G — 19strand per MIL-C-22759/11
*B — TypeET, 7strand F — 7strand per MIL-C-22759/11 26 AWG, 24 AWG
*C — TypeE, 19strand (#28 AWG only) L—Copper, solid
Q—Stranded per MIL-W-22759/33
*Per MIL-W-16878
Items in bold italic are qualified to MIL-DTL-55302.
Configuration shown is per MIL-DTL-55302/121. Polarization – Hexagonal hardware is supplied with connector.
Mounting — Standard mounting holes are shown. Consult Tyco Electronics for modifications.
How To Specify
.125
[3.18]
Section B-B
Section A-A
Retaining Pin
4 Supplied
(Loose Packed)
Polarizing Key
2 Supplied
(Loose Packed)
2 Plcs.
.060
[1.52] 3Plcs.
.030
[0.76] Max.
.250
[6.35] Max.
.050
[1.27] Typ.
Typ.
.250
[6.35]
.050
[1.27] .050
[1.27]
2 Plcs.
.180
[4.57]
2 Plcs.
.330
[8.38]
2 Plcs.
Retaining Pin Holes
4 Plcs.
Polarizing Key Location
2 Plcs.
.275
[6.99]
.150
[3.81] Min.
Solder Dip Typ.
.071
[1.80]
.200
±.015
[5.08
±.381
]Min.
at B
Epoxy
Insulator Assy.
Skt. Contact/
Lead Assy.
24AWG
Copper Wire,
Gold Plated
Ø.187
[4.75] Thru 1 Wall
Ø.091–.098
[2.31–2.49]
C’Bore Ø.187 [4.75] x
.045 [1.14] Deep
(A Side Only)
.071–.076
[1.80–1.93]
2 Plcs.
.250
[6.35]
B
A
B
B2
A2 A1
B1
A
A
B
Thru Hole
2 Plcs.
Note: Board thickness .070 [1.78] Max.
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
Rectangular Connectors
45
Rectangular
Connectors
2
MCEM Series Metal Shell Edgeboard Connectors (Continued)
Mother Board (Pin Side)
152 &
184
Positions
A
B
C
.250
[6.35]
.270
[6.86]
.400
[10.16]
Retaining Pin Hole
4 Plcs.
.343
[8.71] .500
[1.27]
B/2
.050
[1.27]
.075
[1.91]
Polarizing Key Location
2 Plcs.
A
A
A
B
B4
B3 B2
B1
A1
A2
A3
A4
Typ.
D
2 Plcs
.075
[1.91]
.250
[6.35]
.700
[17.78]
.242
[6.15]
.500
[12.70]
Ø.187Thru
[4.75] 3 Plcs.
(B Side Only)
.125
[3.18] .060
[1.52]
3 Plcs.
.071
[1.80]
.343
[8.71]
Min.
Retaining Pin Hole
4 Plcs.
Polarizing Key Locations
2 Plcs.
A
B
A
B
B
A
C
B3 B2
B1
B4
A4
A3 A1
A2
Typ.
.050
[1.27]Typ.
2 Plcs.
2 Plcs.
2 Plcs. DB/2
Ø.091-.098[2.31-2.49] Thru C'Bore
Ø.187[4.75] x .045 [1.14], 3 Plcs.,
(A Side Only)
Section B-B
Daughter Board(Socket Side)
152 &
184
Positions
No. of ABCD
Contacts ± .010 ± .005 Basic Basic
[± .254] [± .127]
152 4.550 4.300 4.750 1.850
115.57 109.22 120.65 46.99
184 5.800 5.550 5.000 2.250
147.32 140.97 127.00 57.15
.250–.300
[6.35–7.62].325–.375
[8.26–9.53]
.075
[1.91]
25 AWG
Copper Wire,
Gold Plated,
Solder Dipped
Insulator
Subassembly
#2-56 UNC-2B Thd.
Hex Polarizing Key
2Supplied (Loose Packed)
Section A-A
B2B1 A1
A2
Pin Contact/
Lead Assembly
.075
[1.91]Typ.Typ.
Typ.
Typ.
.200
[5.08]
.030
[.762]
.053
[1.35]
Min. at B
.250
[6.35]
24 AWG
Copper Wire,
Gold Plated
Section A-A
Polarizing Key
2 Supplied
(Loose Packed)
Retaining Pin
4 Supplied
(Loose Packed)
Max.
Typ.
Max.
Typ.
Epoxy
Skt. Contact/
Lead Assy.
Insulator
Assy.
.150
[3.81]
Min.
Typ.
Solder Dip
