Positronic Industries
connectpositronic.com
PROFESSIONAL QUALITY
FIXED CONTACT
STANDARD DENSITY D-SUBMINIATURE
D
-
S
ub
Size 20 Contacts, Fixed
IEC Publication 60807-2
Performance Level Two
U.L. Recognized
File #E49351
CSA Recognized
File #LR54219
IT
POS
Di
rec
tive
2002
/9
MELO-D SERIES TECHNICAL CHARACTERISTICS
MATERIALS AND FINISHES:
Insulator:
Contacts:
Contact Plating:
Shells:
Nylon resin, UL 94V-0, black color.
Precision machined copper alloy.
Professional performance Gold flash over
nickel plate. Other finishes available upon
request.
Steel or brass with tin plate; zinc plate with
chromate seal, stainless steel passivated.
Other materials and finishes available upon
request.
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 nylon 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.
Contact
Terminations:
Nylon; copper alloy or steel with zinc plate and
chromate seal or tin plate; phosphor bronze
with tin plate; stainless steel, passivated.
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; alu-
minum or aluminum with electroless nickel
plate; die cast zinc.
Non-magnetic versions are available, contact Technical Sales.
Mounting Spacers
and Brackets:
ELECTRICAL CHARACTERISTICS:
Contact Current Rating:
Initial Contact
Resistance:
Insulator Resistance:
Proof Voltage:
Clearance and Creepage
Distance [minimum]:
Working Voltage:
Temperature Range:
Damp Heat, Steady
State:
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.
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:
5
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.
5/
Compliant
EC
•
MD SERIES
MD SERIES
Telecommunication
U.L. File #14098
Melo-D series connectors are professional quality connectors
recommended for use in sheltered, non-corrosive indoor or out-
door environments having normal ventilation, but without temper-
ature 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 featur-
ing a choice of three printed board footprints. Melo-D series connec-
tors 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.
R
O
NIC
INDU
S
RoHS
TR
IES
For RoHS options
see page 10.
r
•
pe
EU
D
-
S
ub
PROFESSIONAL QUALITY
FIXED CONTACT
STANDARD DENSITY D-SUBMINIATURE
CONTACT VARIANTS
FACE VIEW OF MALE OR REAR VIEW OF FEMALE
1
2
3
4
5
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
Positronic Industries
connectpositronic.com
10 11 12 13
6
7
8
9
9
10 11 12 13 14 15
14 15 16 17 18 19 20 21 22
23 24 25
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
MD 25
7
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
M
K
G
10° Typ.
0.050±0.010
[1.27±0.25]
H
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]
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
-0.00
-0.000
Mounting hole, two places
[
]
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]
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]
0.217
[5.51]
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]
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 Industries
connectpositronic.com
PROFESSIONAL QUALITY
FIXED CONTACT
STANDARD DENSITY D-SUBMINIATURE
SOLDER CUP CONNECTOR
Fixed female jackscrews
D
-
S
ub
CODE 2
Fixed female
jackscrew
Fixed male
jackscrew
20 AWG max.
2
[0.5 mm ]
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: MD15M200T6Z
IMPEDANCE [OHMS]
ATTENUATION [dB]
MD SERIES
MD SERIES
3
NEW!
Typical Part Number: MD15M200T2Z
STRAIGHT PRINTED BOARD MOUNT CONNECTOR
CODE 3, 32 AND 33
CODE
NUMBER
L
0.150 [3.81]
0.375 [9.53]
0.500 [12.70]
ØD
0.028 [0.71]
0.028 [0.71]
Fixed female jackscrews
Swaged spacer with
push-on fastener
phosphor bronze
0.225 [5.71]
32
33
0.028 [0.71]
For straight printed board mount
contacts, specify code number in
step 4 of ordering information.
0.010 [0.25]
NOMINAL
L
ØD
Typical Part Number: MD25F3S60T0
FERRITE INDUCTOR BAR FOR EMI/RFI NOISE SUPPRESSION
CODE F AND Q
FILTERING CHARACTERISTICS
STRAIGHT PRINTED BOARD MOUNT CONNECTOR
Fixed female jackscrews
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
CODE
NO.
A
L
IMPEDANCE
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.
Fixed
female
jackscrews
WRAP POST CONNECTOR
0.025 [0.64] Sq.
CODE 6
For wrap post contacts,
specify code 6 in step 4
of ordering information.
0.495 [12.57]
0.720 [18.29]
Typical Part Number: MD15F600T20
7
DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
MD25M6S50T0
D
-
S
ub
PROFESSIONAL QUALITY
FIXED CONTACT
STANDARD DENSITY D-SUBMINIATURE
RIGHT ANGLE (90°) PRINTED BOARD MOUNT CONNECTOR
CODE 5, 0.283 [7.19] CONTACT EXTENSION
MD**5R4*** 0.283 [7.19] CONTACT EXTENSION
Positronic Industries
connectpositronic.com
C
PART NUMBER
MD9*5R4***
MD15*5R4***
MD25*5R4***
A
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]
Fixed
female
jackscrews
B
±0.008
[0.20]
A
MD29*5R4***
MD37*5R4***
MD50*5R4***
0.112 [2.84] Typ.
Specify code 5
in step 4 of
ordering information
Numbering shown is rear view
of male and face view of female.
0.112 [2.84] Typ.
D
D
0.112 [2.84]
Typ.
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:
MD25M5R4NT2X
Push-on fastener
beryllium copper
Ø0.028 [0.71]
Typical Part Number:
MD50M5R4NT2X
0.125 [3.18]
X 0.233 [5.92]
Oval hole Typ.
RIGHT ANGLE (90°) PRINTED BOARD MOUNT CONNECTOR
CODE 59, 0.545 [13.84] CONTACT EXTENSION
MD**59B*** 0.545 [13.84] CONTACT EXTENSION
PART NUMBER
MD9*59B***
A
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]
Fixed
female
jackscrews
B
±0.008
[0.20]
MD15*59B***
A
MD25*59B***
MD29*59B***
MD37*59B***
MD50*59B***
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]
8
MD SERIES
Positronic Industries
connectpositronic.com
PROFESSIONAL QUALITY
FIXED CONTACT
STANDARD DENSITY D-SUBMINIATURE
RIGHT ANGLE (90°) PRINTED BOARD MOUNT CONNECTOR
C
Ø0.125
[3.18]
Typ.
D
-
S
ub
CODE 4, 0.450 [11.43] CONTACT EXTENSION
MD**4B*** 0.450 [11.43] CONTACT EXTENSION
PART NUMBER
MD9*4B***
MD15*4B***
A
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]
Fixed
female
jackscrews
B
±0.008
[0.20]
MD SERIES
MD SERIES
9
A
MD25*4B***
MD29*4B***
MD37*4B***
MD50*4B***
0.112 [2.84] Typ.
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.
0.112 [2.84] Typ.
D
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.
Sym.
Sym.
Sym.
0.492
[12.50]
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
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.
1.250 [31.75]
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.
