PROFESSIONAL QUALITY,
FIXED CONTACT
SUBMINIATURE-D CONNECTORS
Positronic Industries
connectpositronic.com
FOR SHELTERED INDOOR/OUTDOOR ENVIRONMENTAL APPLICATIONS
D-S
ub
Size 20 Contacts, Fixed
Professional Quality
Connectors
IEC Publication 807-2
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.
Male contacts – precision machined brass.
Female contacts – precision machined high
tensile phosphor bronze.
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
materials and finishes available upon
request.
CLIMATIC CHARACTERISTICS:
Temperature Range:
Damp Heat, Steady
State:
-55°C to +125°C.
10 days.
NEW!
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.
MECHANICAL CHARACTERISTICS:
Fixed Contacts:
Contact Retention
In Insulator:
Resistance To Solder
Iron Heat:
Contact
Terminations:
Size 20 contact, male contact - 0.040 inch
[1.02mm] diameter. Female contact -
rugged open entry design.
Mounting Spacers
and Brackets:
NEW!
Nylon plastic, or brass with tin plate; zinc
plate with chromate seal.
Push-On Fasteners:
Phosphor bronze or beryllium copper with
tin plate.
Jackscrew Systems:
Steel with zinc plate and chromate seal, or
clear zinc plate.
Vibration Lock Systems:
Slide lock and lock tabs, steel with nickel
plate.
Hoods:
Thermoplastic UL 94V-0. Composite, brass
or steel with zinc plate and chromate seal.
Non-magnetic versions are available, contact Technical Sales.
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.
ELECTRICAL CHARACTERISTICS:
Contact Current Rating:
Initial Contact
Resistance:
Insulator Resistance:
Proof Voltage:
Clearance and Creepage
Distance [minimum]:
Working Voltage:
6 lbs. [27N]
500°F [260°C] for 10 seconds duration per
IEC 512-6.
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] diameter.
90° Printed Board Mount – 0.028 inch
[0.71mm] 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 512-5.
3
DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
5/
Compliant
EC
•
MD SERIES
Telecommunication
U.L. File #14098
Melo-D Series connectors are professional quality connectors rec-
ommended for use in sheltered, non-corrosive indoor or outdoor envi-
ronments having normal ventilation, but without temperature or humid-
ity controls. These fixed contact connectors meet the dimensional and
performance requirements of IEC 807-2, 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 avail-
able with contact terminations for solder cup, wrap post, and straight
and 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 807-
2 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 connectors conform to EIA RS 232 and RS 449, and
CCITT X.24 interface connector requirements.
O
NIC
INDU
S
RoHS
R
TR
IES
For RoHS options
see page 8.
r
•
pe
EU
D-S
ub
PROFESSIONAL QUALITY,
FIXED CONTACT
SUBMINIATURE-D CONNECTORS
FOR SHELTERED INDOOR/OUTDOOR ENVIRONMENTAL APPLICATIONS
Positronic Industries
connectpositronic.com
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
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.
4
MD SERIES
PROFESSIONAL QUALITY,
FIXED CONTACT
SUBMINIATURE-D CONNECTORS
Positronic Industries
connectpositronic.com
FOR SHELTERED INDOOR/OUTDOOR ENVIRONMENTAL APPLICATIONS
D-S
ub
SOLDER CUP CONNECTOR
Fixed female jackscrews
20 AWG max.
2
[0.5 mm ]
CODE 2
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: MD15M200T6Z
IMPEDANCE [OHMS]
ATTENUATION [dB]
MD SERIES
Fixed
female
jackscrews
Typical Part Number: MD15M200T2Z
STRAIGHT PRINTED BOARD MOUNT CONNECTOR
CODE 3 AND 32
CODE
NUMBER
3
32
Fixed female jackscrews
L
0.150
[3.81]
0.375
[9.53]
ØD
0.028
[0.71]
0.028
[0.71]
Swaged spacer with
push-on fastener
phosphor bronze
0.225 [5.71]
0.010 [0.25]
MIN.
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
FILTERING CHARACTERISTICS
STRAIGHT PRINTED BOARD MOUNT CONNECTOR
Fixed female jackscrews
Swaged spacer with push-on
fastener phosphor bronze
0.010 [0.25] Min.
SERIES
MD
MD
MD
MD
ED
ED
DD
ODD
ODD
HDC
HDC
HDC
CODE NO.
32
4
59
6
36
6
32
32
5
32
36
6
A
0.375 [9.53]
------
------
0.375 [9.53]
0.375 [9.53]
0.375 [9.53]
0.515 [13.08]
0.375 [9.53]
------
0.375 [9.53]
0.375 [9.53]
0.375 [9.53]
L
0.240 [6.10]
------
------
0.360 [9.14]
0.101 [2.57]
0.360 [9.14]
0.165 [4.19]
0.165 [4.19]
------
0.240 [6.10]
0.101 [2.57]
0.360 [9.14]
IMPEDANCE
A
L
ATTENUATION*
90° PRINTED BOARD MOUNT CONNECTOR
Ferrite inductor bar
0.135±0.005
[3.43±0.13]
FREQUENCY
*NO-LOAD CONDITION
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 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
5
DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
MD25M6S50T0
D-S
ub
PROFESSIONAL QUALITY,
FIXED CONTACT
SUBMINIATURE-D CONNECTORS
FOR SHELTERED INDOOR/OUTDOOR ENVIRONMENTAL APPLICATIONS
Positronic Industries
connectpositronic.com
90° PRINTED BOARD MOUNT CONNECTOR
CODE 5, 0.283 [7.19] CONTACT EXTENSION
C
MD**5R4*** 0.283 [7.19] CONTACT EXTENSION
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
15
3
15
2
14
1
0.160 [4.06]
Nominal
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
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
15
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.
6
MD SERIES
PROFESSIONAL QUALITY,
FIXED CONTACT
SUBMINIATURE-D CONNECTORS
Positronic Industries
connectpositronic.com
FOR SHELTERED INDOOR/OUTDOOR ENVIRONMENTAL APPLICATIONS
D-S
ub
90° PRINTED BOARD MOUNT CONNECTOR
CODE 4, 0.450 [11.43] CONTACT EXTENSION
Ø0.125
[3.18]
Typ.
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]
C
MD SERIES
7
MD25*4B***
Fixed
female
jackscrews
B
±0.008
[0.20]
A
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
15
3
15
2
14
1
0.160 [4.06]
Nominal
Typical Part Number:
MD25M4B0T20
Ø0.028 [0.71]
Typical Part Number:
MD50M4B0T20
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
DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
MD37
MD50
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.
Programming Basics
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