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PROFESSIONAL QUALITY
FIXED CONTACT
STANDARD DENSITY D-SUBMINIATURE
D
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Size 20 Contacts, Fixed
IEC Publication 60807-2
Performance Level Two
UL Recognized
File #E49351
CSA Recognized
File #LR54219
MD SERIES
5
Telecommunication
UL File #E140980
Melo-D series connectors are professional quality
connectors recommended for use in sheltered, non-corrosive
indoor or outdoor environments having normal ventilation,
but without temperature or humidity controls. These fixed
contact connectors meet the dimensional and performance
requirements of IEC 60807-2, Performance Level Two.
Melo-D series connectors utilize precision machined
contacts which are fixed within the connector body. The
female contact is an open entry design contact, precision
machined of high tensile phosphor bronze.
Six standard connector variants are offered in arrangements
of 9, 15, 25, 29, 37 and 50 contacts. Each Melo-D
connector variant is available with contact terminations for
solder cup, wrap post, and straight and right angle (90°)
printed board mount terminations featuring a choice of
three printed board footprints. Melo-D series connectors
are mateable and compatible with all D-subminiature
connectors conforming to IEC 60807-2, IEC 60807-3 and
MIL-DTL-24308.
A wide assortment of printed board mounting hardware,
cable support hoods and locking systems is available from
stock.
MELO-D SERIES TECHNICAL CHARACTERISTICS
MATERIALS AND FINISHES:
Insulator:
Contacts:
Contact Plating:
Shells:
Mounting Spacers
and Brackets:
Nylon resin, UL 94V-0, black color.
Precision machined copper alloy.
Professional performance Gold flash over
nickel plate. Other finishes available upon
request.
Steel with tin plate; zinc plate with chromate
seal, stainless steel passivated. Other mat
rials and finishes available upon request.
Contact Terminations:
Solder cup contacts - 0.042 inch [1.06mm]
minimum hole diameter for 20 AWG [0.5mm
2
]
wire maximum.
Straight Printed Board Mount - 0.028 inch
[0.71mm] termination diameter.
Right Angle (90°) Printed Board Mount -
0.028 inch [0.71mm] termination diameter
for all printed board footprints.
Wrap Post - 0.025 inch [0.64mm] square.
Shells:
Male shells may be dimpled for EMI/ESD
ground paths.
Polarization:
Trapezoidally shaped shells and polarized
jackscrews.
Mounting To Angle Brackets:
Jackscrews and riveted fasteners with a
0.120 inch [3.05mm] clearance hole, and
threaded riveted fasteners with 4-40 threads
and polyester lock inserts.
Mounting To Printed Board:
Rapid installation push-on fasteners and
threaded posts.
Locking Systems:
Jackscrews and vibration locking systems.
Mechanical Operations:
500 operations minimum per IEC 60512-5.
7.5 amperes nominal.
0.008 ohms maximum.
5 G ohms.
1000 V r.m.s.
0.039 inch [1.0mm].
300 V r.m.s.
-55°C to +125°C.
10 days.
Nylon; copper alloy or steel with zinc plate
and chromate seal or tin plate; phos-
phor bronze with tin plate; stainless steel,
passivated; polyester.
Push-On Fasteners:
Phosphor bronze or beryllium copper with
tin plate.
Jackscrew Systems:
Brass or steel with zinc plate and chromate
seal or clear zinc plate or tin plate; stainless
steel, passivated.
vibration Lock Systems:
Slide lock and lock tabs, steel with nickel
plate.
Hoods:
Composite and plastic, UL 94V-0; brass
or steel with zinc plate and chromate seal.
Aluminum; aluminum with electroless nickel
plate. For aluminum hoods, zinc content is
1% maximum. Die cast zinc.
Low magnetic versions are available, contact Technical Sales.
ELECTRICAL CHARACTERISTICS:
Contact Current Rating:
Initial Contact
Resistance:
Insulation Resistance:
Proof voltage:
Clearance and Creepage
Distance [minimum]:
Working voltage:
Temperature Range:
Damp Heat, Steady
State:
MECHANICAL CHARACTERISTICS:
Fixed Contacts:
Contact Retention
In Insulator:
Resistance To Solder
Iron Heat:
Size 20 contact, male - 0.040 inch [1.02mm]
mating diameter. Female contact - rugged
open entry design.
6 lbs. [27N]
500°F [260°C] for 10 seconds duration per
IEC 60512-6.
CLIMATIC CHARACTERISTICS:
DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
MD series connectors can be supplied with interfacial seals
and sealed between shell and insulator. This provides an additional
degree of moisture resistance. See Accessories catalog for details.
D
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PROFESSIONAL QUALITY
FIXED CONTACT
STANDARD DENSITY D-SUBMINIATURE
CONTACT VARIANTS
1
9
2
3
4
5
6
7
8
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FACE VIEW OF MALE OR REAR VIEW OF FEMALE
1
6
2
7
3
8
4
9
5
1
2
3
4
5
6
7
8
9
10 11 12 13
23 24 25
10 11 12 13 14 15
14 15 16 17 18 19 20 21 22
MD 9
1
2
3
4
5
6
7
8
9
10
1
11 12 13 14 15 16 17 18 19
20
21 22 23 24 25 26 27 28 29
2
3
4
5
6
7
8
MD 15
1
9
10 11 12 13 14 15 16 17 18 19
2
3
4
5
6
7
MD 25
8
9
10 11 12 13 14 15 16 17
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
34
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
MD 29
MD 37
MD 50
STANDARD SHELL ASSEMBLY
B
B1
K
M
0.050±0.010
[1.27±0.25]
H
G
10° Typ.
E
D1
D
C
A
0.036±0.008
[0.91±0.20]
0.220 [5.59]
Max.
Ø0.120±0.005 [Ø3.05±0.13]
Mounting hole, two places
OPTIONAL SHELL ASSEMBLY (0, 02)
OPTIONAL SHELL ASSEMBLY
WITH UNIVERSAL FLOAT MOUNTS (F)
0.120±0.010 [3.05±0.25]
0.050±0.020
[1.27±0.51]
Ø0.120±0.005 [Ø3.05±0.13]
Mounting hole, two places
for stainless steel shell (0 option)
Ø0.154 [3.91] Mounting hole,
two places (02 option)
A
±0.015
[0.38]
1.213
[30.81]
1.213
[30.81]
1.541
[39.14]
1.541
[39.14]
2.088
[53.04]
2.088
[53.04]
1.770
[44.96]
1.770
[44.96]
2.729
[69.32]
2.729
[69.32]
2.635
[66.93]
2.635
[66.93]
2.064
[52.43]
2.159
[54.84]
2.079
[52.81]
1.251
[31.78]
2.182
[55.42]
1.511
[38.38]
1.274
[32.36]
0.971
[24.66]
1.534
[38.96]
0.643
[16.33]
0.994
[25.25]
B
±0.005
[0.13]
B1
±0.005
[0.13]
0.666
[16.92]
C
±0.005
[0.13]
0.984
[24.99]
0.984
[24.99]
1.312
[33.32]
1.312
[33.32]
1.852
[47.04]
1.852
[47.04]
1.534
[38.96]
1.534
[38.96]
2.500
[63.50]
2.500
[63.50]
2.406
[61.11]
2.406
[61.11]
0.423
[10.74]
0.311
[7.90]
0.431
[10.95]
0.311
[7.90]
0.311
[7.90]
0.311
[7.90]
D
±0.005
[0.13]
0.032 [0.81]
Total diametral float
Ø0.086+0.005 Ø2.18+0.13
-0.000
-0.00
Mounting hole, two places
H
±0.010
[0.25]
0.422
[10.72]
0.422
[10.72]
0.422
[10.72]
0.422
[10.72]
0.422
[10.72]
0.422
[10.72]
0.539
[13.69]
0.539
[13.69]
0.422
[10.72]
0.422
[10.72]
0.534
[13.56]
0.534
[13.56]
K
±0.005
[0.13]
0.233
[5.92]
0.243
[6.17]
0.233
[5.92]
0.243
[6.17]
0.230
[5.84]
0.243
[6.17]
0.230
[5.84]
0.237
[6.02]
0.230
[5.84]
0.243
[6.17]
0.230
[5.84]
0.243
[6.17]
M
±0.010
[0.25]
0.422
[10.72]
0.429
[10.90]
0.422
[10.72]
0.429
[10.90]
0.426
[10.82]
0.429
[10.90]
0.426
[10.82]
0.429
[10.90]
0.426
[10.82]
0.429
[10.90]
0.426
[10.82]
0.429
[10.90]
[
]
CONNECTOR
VARIANT SIZES
9M
9F
15 M
15 F
25 M
25 F
29 M
29 F
37 M
37 F
50 M
50 F
D1
±0.005
[0.13]
0.329
[8.36]
E
±0.015
[0.38]
0.494
[12.55]
0.494
[12.55]
G
±0.010
[0.25]
0.759
[19.28]
0.759
[19.28]
1.083
[27.51]
1.083
[27.51]
1.625
[41.28]
1.625
[41.28]
1.322
[33.58]
1.322
[33.58]
2.272
[57.71]
2.272
[57.71]
2.178
[55.32]
2.178
[55.32]
0.329
[8.36]
0.494
[12.55]
0.494
[12.55]
0.329
[8.36]
0.494
[12.55]
0.494
[12.55]
0.450
[11.43]
0.605
[15.37]
0.605
[15.37]
0.329
[8.36]
0.494
[12.55]
0.494
[12.55]
0.441
[11.20]
0.605
[15.37]
0.605
[15.37]
DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
6
MD SERIES
Positronic
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PROFESSIONAL QUALITY
FIXED CONTACT
STANDARD DENSITY D-SUBMINIATURE
SOLDER CUP TERMINATION
Fixed female jackscrews
D
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CODE 2
20 AWG max.
2
[0.5 mm ]
Fixed female
jackscrew
Fixed male
jackscrew
0.135 [3.43]
0.352 [8.94]
For solder cup contacts, specify
code 2 in step 4
of ordering information.
Fixed male and female polarized jackscrews available.
Specify code T6 in step 7 of ordering information.
Typical Part Number: MD15M200T2Z
Typical Part Number: MD15M200T6Z
IMPEDANCE [OHMS]
ATTENUATION [dB]
MD SERIES
Fixed
female
jackscrews
STRAIGHT PRINTED BOARD MOUNT TERMINATION
CODE 3, 32 AND 33
CODE
NUMBER
3
32
33
L
0.150 [3.81]
0.375 [9.53]
0.500 [12.70]
ØD
0.028 [0.71]
0.028 [0.71]
0.028 [0.71]
Swaged spacer with
push-on fastener
phosphor bronze
Fixed female jackscrews
0.225 [5.71]
0.010 [0.25]
NOMINAL
For straight printed board mount
contacts, specify code number in
step 4 of ordering information.
L
ØD
Typical Part Number: MD25F3S60T0
FERRITE INDUCTOR BAR FOR EMI/RFI NOISE SUPPRESSION
CODE F AND Q
STRAIGHT PRINTED BOARD MOUNT CONNECTOR
Fixed female jackscrews
FILTERING CHARACTERISTICS
Swaged spacer with push-on
fastener phosphor bronze
0.010 [0.25] Nominal
SERIES
MD, MDX, HDC
ODD
DD
ED, HDC
MD, MDX
ODD
MD
36
4
5
59
6
32
IMPEDANCE
CODE
NO.
A
L
0.375 [9.53] 0.240 [6.10]
0.375 [9.53] 0.165 [4.19]
0.515 [13.08] 0.165 [4.19]
0.375 [9.53] 0.101 [2.57]
----------
----------
----------
----------
----------
----------
A
ATTENUATION*
L
Ferrite Inductor Bar
RIGHT ANGLE (90°)
PRINTED BOARD MOUNT CONNECTOR
Ferrite inductor bar
0.135±0.005
[3.43±0.13]
FREQUENCY
* NO-LOAD CONDITION
MD, HDC
0.375 [9.53] 0.360 [9.14]
MATERIAL:
Nickel zinc ceramic
Specify code F or Q in step 6 of ordering
information. F for ferrite inductor and Q for
ferrite inductor with push-on fastener.
WRAP POST TERMINATION
0.025 [0.64] Sq.
CODE 6
0.495 [12.57]
0.720 [18.29]
For wrap post contacts,
specify code 6 in step 4
of ordering information.
Typical Part Number: MD15F600T20
7
DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
MD25M6S50T0
D
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PROFESSIONAL QUALITY
FIXED CONTACT
STANDARD DENSITY D-SUBMINIATURE
RIGHT ANGLE (90°) PRINTED BOARD MOUNT TERMINATION
CODE 5, 0.283 [7.19] CONTACT EXTENSION
MD**5**** 0.283 [7.19] CONTACT EXTENSION
PART NUMBER
MD9*5****
MD15*5****
MD25*5****
A
*
1
1.204
[30.58]
1.532
[38.91]
2.072
[52.63]
1.754
[44.55]
2.720
[69.09]
2.626
[66.70]
B
0.984
[24.99]
1.312
[33.32]
1.852
[47.04]
1.534
[38.96]
2.500
[63.50]
2.406
[61.11]
C
0.339
[8.61]
0.339
[8.61]
0.339
[8.61]
0.395
[10.03]
0.339
[8.61]
0.395
[10.03]
D
0.283
[7.19]
0.283
[7.19]
0.283
[7.19]
0.283
[7.19]
0.283
[7.19]
0.283
[7.19]
Positronic
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C
Fixed
female
jackscrews
B
±0.008
[0.20]
*
1
“A” dimension applies for
metal angle brackets only.
Consult Accessories
D-subminiature catalog for
“A” dimension when plastic
brackets are used.
A
*
1
MD29*5****
MD37*5****
MD50*5****
0.112 [2.84] Typ.
Specify code 5
in step 4 of
ordering information
D
0.112 [2.84]
Typ.
Numbering shown is rear view
of male and face view of female.
0.112 [2.84] Typ.
D
0.160 [4.06]
Nominal
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
Typical Part Number:
MD25M5R4NT2X
0.125 [3.18]
X 0.233 [5.92]
Oval hole Typ.
Push-on fastener
beryllium copper
Ø0.028 [0.71]
Typical Part Number:
MD50M5R4NT2X
RIGHT ANGLE (90°) PRINTED BOARD MOUNT TERMINATION
CODE 59, 0.545 [13.84] CONTACT EXTENSION
MD**59**** 0.545 [13.84] CONTACT EXTENSION
PART NUMBER
MD9*59****
A
*
1
1.204
[30.58]
1.532
[38.91]
2.072
[52.63]
1.754
[44.55]
2.720
[69.09]
2.626
[66.70]
B
0.984
[24.99]
1.312
[33.32]
1.852
[47.04]
1.534
[38.96]
2.500
[63.50]
2.406
[61.11]
C
0.275
[6.99]
0.275
[6.99]
0.275
[6.99]
0.275
[6.99]
0.275
[6.99]
0.275
[6.99]
D
0.545
[13.84]
0.545
[13.84]
0.545
[13.84]
0.545
[13.84]
0.545
[13.84]
0.545
[13.84]
E
0.601
[15.27]
0.601
[15.27]
0.601
[15.27]
0.657
[16.69]
0.601
[15.27]
0.657
[16.69]
NOTE:
Fixed
female
jackscrews
B
±0.008
[0.20]
*
1
“A” dimension applies for
metal angle brackets only.
Consult Accessories
D-subminiature catalog for
“A” dimension when plastic
brackets are used.
MD15*59****
A
*
1
MD25*59****
MD29*59****
MD37*59****
MD50*59****
C
E
Specify code 59
in step 4 of
ordering information
Typical Part Number:
MD29M59B0T2X
0.112 [2.84] Typ.
0.112 [2.84] Typ.
D
D
0.112 [2.84]
Typ.
Numbering shown is rear view
of male and face view of female.
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
0.125 [3.18]
Nominal
Typical Part Number:
MD25M59B0T2X
Ø0.028 [0.71]
DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
8
MD SERIES
NOTE:
Positronic
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PROFESSIONAL QUALITY
FIXED CONTACT
STANDARD DENSITY D-SUBMINIATURE
RIGHT ANGLE (90°) PRINTED BOARD MOUNT TERMINATION
C
Ø0.125
[3.18]
Typ.
D
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S
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CODE 4, 0.450 [11.43] CONTACT EXTENSION
MD**4**** 0.450 [11.43] CONTACT EXTENSION
PART NUMBER
MD9*4****
MD15*4****
A
*
1
1.204
[30.58]
1.532
[38.91]
2.072
[52.63]
1.754
[44.55]
2.720
[69.09]
2.626
[66.70]
B
0.984
[24.99]
1.312
[33.32]
1.852
[47.04]
1.534
[38.96]
2.500
[63.50]
2.406
[61.11]
C
0.506
[12.85]
0.506
[12.85]
0.506
[12.85]
0.562
[14.27]
0.506
[12.85]
0.562
[14.27]
D
0.450
[11.43]
0.450
[11.43]
0.450
[11.43]
0.450
[11.43]
0.450
[11.43]
0.450
[11.43]
NOTE:
Fixed
female
jackscrews
B
±0.008
[0.20]
*
1
“A” dimension applies for
metal angle brackets only.
Consult Accessories
D-subminiature catalog for
“A” dimension when plastic
brackets are used.
MD SERIES
9
A
*
1
MD25*4****
MD29*4****
MD37*4****
MD50*4****
0.112 [2.84] Typ.
0.112 [2.84] Typ.
D
Specify code 4
in step 4 of
ordering information
D
0.112 [2.84]
Typ.
Numbering shown is rear view
of male and face view of female.
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
0.160 [4.06]
Nominal
Typical Part Number:
MD25M4B0T20
Ø0.028 [0.71]
Typical Part Number:
MD50M4B0T20
RIGHT ANGLE (90°) AND STRAIGHT PRINTED BOARD CONTACT HOLE PATTERN
MOUNT CONNECTOR WITH MATING FACE POSITIONED TO FOLLOW DIRECTION OF ARROW.
0.492
[12.50]
Sym.
Sym.
Sym.
0.216 [5.49]
0.108 [2.74]
Typ.
0.656
[16.66]
0.378 [9.60]
0.054 [1.37]
Typ.
0.926 [23.52]
0.652 [16.56]
0.109 [2.77]
Typ.
0.054 [1.37]
Typ.
0.112
[2.84]
0.162 [4.11]
0.108 [2.74]
Typ.
0.112
[2.84]
0.324 [8.23]
0.055 [1.40]
Typ.
0.598 [15.19]
0.112
[2.84]
MD9
Sym.
MD15
1.250 [31.75]
Sym.
MD25
1.203
[30.56]
0.109
[2.77]
Typ.
Sym.
0.767
[19.48]
0.224
[5.69]
0.432
[10.97]
0.108 [2.74]
Typ.
0.978 [24.84]
0.109
[2.77]
Typ.
0.870
[22.10]
0.224
[5.69]
0.112
[2.84]
0.054
[1.37]
Typ.
0.486
[12.34]
0.055 [1.40]
Typ.
0.112
[2.84]
0.924 [23.47]
0.055 [1.40]
Typ.
0.815 [20.70]
0.112
[2.84]
MD29
MD37
MD50
SUGGESTED PRINTED BOARD HOLE SIZES:
DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
Suggest 0.045 [1.14] Ø hole for contact termination positions.
Suggest 0.123 ±0.003 [3.12 ±0.08] Ø hole for mounting connector with push-on fasteners.
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