Rack & Panel
MRA Series
Miniature Rectangular
/
#16 Contacts
/
.062" Dia.
/
13 Amps
Receptacle MRA 34S-G
Plug MRA 34P-G
Hood
The MRA Series offers compact, lightweight
and self-aligning plugs and receptacles with
unusually high current and voltage ratings for
their size. Performance tests show them to
well exceed military standards. Except for
contact size, the MRA and MRE Series share
the same hoods, hardware and accessories.
Right angle, dip solder, pin or socket contacts
are available. Consult factory.
Dimensions are for reference only and are
subject to change. Outline drawings on request.
SPECIFICATIONS
Current Rating:13
amps
Number of
contacts:
9, 14, 20, 34, 41, 42, 50, 50-
8, 66, 75, 104
Pin Contacts:
.062 diameter, gold plated
brass
Socket
Contacts:
Phosphor bronze, gold plated
Terminations:
.070 dia. solder cup is
standard. Will accommodate
up to #16 AWG stranded
wire. Pin and Socket
contacts available with .030
diameter dip solder termina-
tions. Consult Sales Dept.
for lengths available.
Electrical Data:Meets
high potential
performance of MIL-C-28748.
Military versions are QPL’d to
M28748/1 and M28748/2.
The minimum dielectric
withstanding voltage is one
minute electrification 1000
VAC, sea level.
Dielectric:
Gray glass filled diallyl
phthalate, per MIL-M-14,
SDG-F.
Gold plated guides provide
polarization. Polarized nickel-
plated brass and/or passivated
stainless steel jackscrews with
anodized aluminum knobs
are available.
Anodized aluminum. May be
applied to either plug or
receptacle. Both top and side
opening hoods available.
Polarization:
Hoods:
Winchester/Retconn
62 Barnes Industrial Road North, Wallingford, Connecticut 06492 Phone:(203)741-5400 Fax:(203)741-5500 www.winchesterelectronics.com
RP /
25
Rack & Panel
MRA Series
Miniature Rectangular
/
#16 Contacts
/
.062" Dia.
/
13 Amps
TERMINATION TYPES
Solder Cup
For pin and socket contacts, .070 diameter
solder cup is the standard termination for
cable and panel mount applications. Wire
accommodation: up to #16 AWG stranded.
Dip Solder
For pin and socket contacts, .030 diameter
dip solder terminations, straight or right angle
for mounting to printed circuit board or for use
with flexible cable.
GUIDE SOCKETS
3 Types of Guide Sockets are Available
Guide
Socket
Code Letter
Application
The “G” type socket is the standard guide supplied. It
has good physical strength and may be used electrically
in a low current circuit or as a contact for ground leads.
Actual
Size Photo
G*
G Type
For General Use
Phosphor
K*
The “K” guide socket is an excellent electrical conductor.
Its extra spring-tension provides a high normal force
uniformily distributed along the surface of the engaged
pilot guide, thus minimizing electrical resistance.
The multivolt drop across extreme ends of the engaged
pilot and socket guide is 10 mv. at 20 amps.
The high physical strength of the “N” guide socket allows
a greater degree of forcible tightening against a mounting
surface than is permitted by the other guide sockets.
This feature is particularly desirable for mounting
connectors which will be subject to severe vibration in
service. “N” guides are not to be used electrically.
K Type For High
Electrical Conductivity
Beryllium Copper
Standard Guide
Pin mates with all types
Brass
N*
N Type For extra
Mechanical Strength
Brass
* For passivated stainless steel add SS suffix
PHYSICAL DATA
WEIGHT
IN OZ.
PLUG
RECEPTACLE
NUMBER OF CONTACTS
9
.5
.4
14
.5
.4
20
.5
.4
34 41 42 50 50-8 66 75 104
1.1 1.2 1.2 1.5 1.5 2.0 2.3 3.1
.8 .9 .9 1.1 1.1 1.5 1.7 2.2
SPECIAL
MRA-50-8 with 8, 20 amp solder cup
contacts and 50, 13 amp solder cup
contacts
CONTACTS
8
.50
CURRENT
RATING
20 amps
13 amps
PIN
MAX. WIRE
DIAMETER
SIZE
.093
.062
#12 AWG
#16 AWG
SOLDER
CUP DIA
.106 D
.070 D
Winchester/Retconn
62 Barnes Industrial Road North, Wallingford, Connecticut 06492 Phone:(203)741-5400 Fax:(203)741-5500 www.winchesterelectronics.com
RP /
26
Rack & Panel
MRA Series
OUTLINE
Dimensions are for reference only and
are subject to change. Outline drawings
on request.
Drawings and corresponding part
numbers show G type guide sockets.
.86
.37
.27
.37
.37
.27
.78
Miniature Rectangular
/
#16 Contacts
/
.062" Dia.
/
13 Amps
.070 Dia.
Solder
Cup
1.313 1.000
.150 Typ.
.172 Typ.
4-40 UNC-2A THD.
Slot .038 Wide
Receptacle
MRA 9S-G
.44
.27
Plug
MRA 9P-G
.86
.37
.062 Dia.
.78
.37
.44
.27
.070 Dia.
Solder
Cup
.86
.37
.062 Dia.
.78
.37
.27
.27
.937
.150 Typ.
1.250
.075 Typ.
Slot
.038 Wide
1.250
1.563
.070 Dia.
Solder
Cup
.150 Typ.
.075 Typ.
Slot
.038 Wide
.168 Typ.
.130 Typ.
4-40 UNC-2
THD. Type
.175 Typ.
.130 Typ.
4-40 UNC-2 THD. Type
Receptacle
MRA 14S-G
Plug
MRA 14P-G
Receptacle
MRA 20S-G
Plug
MRA 20P-G
.75
.47
.23
.075
Typ.
.070 Dia.
Solder
Cup
.86
.27
.37
.37
.78
.27
.44
.075
Typ.
.27
.86
.37
.78
.37
.27
2.312
2.000
1.688
2.625
.070 Dia.
Solder
Cup
Mounting Holes For No. 4
Machine Screws
.180 Typ.
Slot
.038 Wide
4-40 UNC-2
THD. Type
Slot .038 Wide
.130 Typ.
4-40 UNC-2 THD. Type
Receptacle
MRA 34S-G
Plug
MRA 34P-G
Receptacle
MRA 41S-G
Plug
MRA 41P-G
Winchester/Retconn
62 Barnes Industrial Road North, Wallingford, Connecticut 06492 Phone:(203)741-5400 Fax:(203)741-5500 www.winchesterelectronics.com
RP /
27
Rack & Panel
MRA Series
OUTLINE
Dimensions are for reference only and are subject
to change. Outline drawings on request.
Drawings and corresponding part numbers show
G type guide sockets.
.75
.47
.23
.86
.09R
.27 .37
.062 Dia.
.78
.37 .27
.075
Typ.
.88
.75
.47
.23
.86
.27 .37
.09
.14
Miniature Rectangular
/
#16 Contacts
/
.062" Dia.
/
13 Amps
.78
.37
.27
.075
Typ.
2.313
.070 Dia.
Solder
Cup
2.282
2.594
.070 Dia. 2.000
Solder
Cup
2.719
Mounting
Holes For
No. 4
Machine
Screws
.180 Typ.
4-40 UNC-2 THD.
Slot .038 Wide
Mounting Holes For
No. 4 Machine Screws
.180 Typ.
4-40 UNC-2 THD.
Slot .038 Wide
Receptacle
MRA 42S-G
Plug
MRA 42P-G
Receptacle
MRA 50S-G
1.234
1.109
.77
.23
Plug
MRA 50P-G
.86
.27 .37
.09
.14
.78
.37 .27
1.125
.50
.150
Typ.
.25
.86
.27 .37
.78
.37 .27
.075
Typ.
.106 Dia.
Solder
Cup
1.969
2.281
.070 Dia.
Solder
Cup
2.282
2.594
2.719
.16
Mounting Holes
For No. 4 Machine
Screws
.180 Typ.
4-40 UNC-2A THD.
Slot .038 Wide
Mounting
Holes For
No. 4 Machine
Screws
.180 Typ.
4-40 UNC-2 THD.
Slot .038 Wide
Receptacle
MRA 50-8S-G
.070 Dia.
Solder Cup
.86
.31R
.27 .37
Plug
MRA 50-8P-G
Receptacle
MRA 75S-G
1.531
.88
Plug
MRA 75P-G
.78
.560
.37
1.125
.50
.25
8-32 UNC-2A Thd.
.560
.37
.78
.37 .27
.075
Typ.
.44
.150
Typ.
.13
2.750
2.375
2.281
1.969
.16
.038 Dia.
hole
for safety
wire
Mounting Holes For
No. 4 Machine
Screws
.180 Typ.
4-40
UNC-2 THD.
Slot .038 Wide
.180 Typ.
4-40
UNC-2 THD.
.27
.16
.16
.98
Receptacle
MRA 66S-G
Plug
MRA 66P-G
Receptacle
MRA 104S-J
Plug
MRA 104P-JT
Winchester/Retconn
62 Barnes Industrial Road North, Wallingford, Connecticut 06492 Phone:(203)741-5400 Fax:(203)741-5500 www.winchesterelectronics.com
RP /
28
Rack & Panel
MRA Series
Miniature Rectangular
/
#16 Contacts
/
.062" Dia.
/
13 Amps
Polarized jackscrews give the ease and assur-
ance of threaded positive coupling. The actuating
side consists of two turnable screws, one male
and one female, each with knurled and slotted
knobs. On the mating half are the two fixed
screws required to complete the locking action.
When mated, the jackscrews may be locked with
a safety wire through the hole in the self-locking
pin (in the jackscrew shaft).
The drawings show the extension of the jack-
screw knobs beyond a typical MRA connector
and beyond the connector-and-hood assembly
(center drawings). Dimensions given are
constant for all connectors except as noted.
Other dimensions applicable to various hood
styles are detailed in the chart.
JACKSCREWS & JACKSOCKETS
4-40 UNC 2 Thread
except size 104 which is
6-32 UNC 2
.78
.98 for
size 104
.16
A
B
Mono-
Jackscrew
Jacksocket
6-32 UNC 2 Thread
except size 104 which is
8-32 UNC2
Jackscrew
.16
C
D
Hood Self Locking
Pin
E
Mono-
Jacksocket
.052 Dia. Safety Wire Hole
F
Connector with fixed Jackscrews.
Code designation: J
Mating connector half with turnable
Jackscrews-with-Knobs.
Code designation: JT
Mating connector half with Hood and
turnable Long Jackscrews-with
Knobs. Code designation: JTCH,
JTCH1
Mating connector half with Hood
and turnable Monojacks.
Code designation: JTDH, JTDH1
DIMENSIONS
Dimensions are for reference only and
are subject to change. Outline drawings
on request.
Connec-
tor Size
MRA 9
MRA 14
MRA 20
MRA 34
MRA 41
MRA 42
MRA 50
MRA 50-8
MRA 66
MRA 75
MRA 104
Dimension A
H H1 H8 H9
–
–
–
.63
.63
.58
.58
.77
.77
.56
.67
.59
.59
.59
.63
.63
.58
.58
–
–
.56
–
.58
.58
.58
.63
–
.58
.58
–
–
.56
–
.59
.59
.59
.63
–
.58
.58
.70
.70
.56
.67
Dimension E
Dimension B Dimen Dimen
C
D
H H1 H8 H9
H H1 H8 H9
–
–
–
.63
–
.58
.58
.50
.50
.56
.50
–
–
–
.63
–
.58
.58
–
–
.56
–
–
–
–
.63
–
.58
.58
–
–
.56
–
–
–
–
.63
–
.58
.58
.50
.50
.56
.50
.80
.80
.80
.80
.80
.80
.80
.80
.80
.80
.80
1.31
1.31
1.31
1.31
1.31
1.31
1.31
1.31
1.31
1.31
1.52
–
–
–
2.41
2.41
2.41
2.41
2.47
2.47
2.41
3.42
2.41
2.41
2.41
2.41
2.41
2.41
2.41
–
–
2.41
–
2.09
1.84
1.84
2.41
–
2.41
2.41
–
–
2.41
–
2.41
2.41
2.41
2.41
–
2.41
2.41
2.41
2.41
2.41
3.42
Dimension F
H H1 H8 H9
–
–
–
2.41
–
2.41
2.41
2.19
2.19
2.41
3.25
–
–
–
2.41
–
2.41
2.41
–
–
2.41
–
–
–
–
2.41
–
2.41
2.41
–
–
2.41
–
–
–
–
2.41
–
2.41
2.41
2.19
2.19
2.41
3.25
New Monojacks Assemble and Disassemble With Remarkable Ease and Speed
To free the connector from the hood, simply
remove four screws. Monojacks may be used
on miniature rectangular connectors with from
34 to 104 contacts, molds have 2 center thru
holes and 4 mounting holes.
MONOJACKS ARE CAPTIVATED IN KEYHOLE
SLOT OF HOOD AS SHOWN ABOVE.
WHEN USING SHELLS, MONOJACKS ARE
CAPTIVATED IN KEYHOLE OF SHELL AND
CLEARANCE HOLES ARE PLACED IN HOODS.
Winchester/Retconn
MOLDINGS HAVE STRAIGHT THRU HOLES
62 Barnes Industrial Road North, Wallingford, Connecticut 06492 Phone:(203)741-5400 Fax:(203)741-5500 www.winchesterelectronics.com
RP /
29
