1
Harsh Environment
Power Connectors
MIL-DTL-55181
MIL-DTL-12520
and Commercial
Versions for
Mid-Range Power
Operations
23 Front Street, Salem, NJ 08079 P: 856-935-7560 www.cooperinterconnect.com
2
Power Connectors
Table of Contents
Introduction ...........................................................................................p. 3
M55181 Connectors (Including MW) ...................................................p. 5
COTS 55181 Connectors ...................................................................p. 10
COTS 55181 Adaptors ........................................................................p. 14
M12520 Connectors (Including UW)..................................................p. 18
Power Receptacles.............................................................................p. 22
Innovation You Can Trust
In The Most Challenging Conditions
3
23 Front Street, Salem, NJ 08079 P: 856-935-7560
Introduction
Cooper Interconnect’s line of QPL qualified and Commercial-Off-The-Shelf
(COTS) mid-range power connectors offer exceptional durability and versatile
configurations for virtually any military or industrial need.
The QPL versions have endured over 30 years of ground support field use in
the most demanding conditions. Weatherproof seals, rugged construction,
and premium quality components have allowed Cooper Interconnect’s
products to excel when the requirement is mission-critical in a harsh
environment.
The value-engineered COTS family offers the same outstanding performance
as our QPL military workhorse, at a more economical price. Along with direct
equivalents for our most popular QPL configurations, Cooper Interconnect
offers cable adaptor configurations that provide flexibility to connect various
cable sizes in the field or factory.
23 Front Street, Salem, NJ 08079 P: 856-935-7560 www.cooperinterconnect.com
4
Introduction
CONNECTIVITY
For your toughest mid-range power connector
applications, look to Cooper Interconnect
for the right solution.
M55181 Series QPL qualified to MIL-DTL-55181, latest version.
Follows U.S. government part number designation.
MW Series Same as M55181 Series.
Follows Cooper Interconnect’s part number designation.
UW Series Meets all the requirements of MIL-DTL-12520.
Follows Cooper Interconnect’s part number designation
GC55181 Standard
Series
COTS version of the MW (or M55181) Series.
GC before the 55181 represents the COTS version.
GC55181 Adaptor
Series
Similar to the GC55181 Standard Series, but is a variation providing
three cable inlet adaptors to support a wide range of cables.
INNOVATION
5
23 Front Street, Salem, NJ 08079 P: 856-935-7560
M55181 Power Connectors
M55181 Connectors
With over 30 years of field-proven reliability, Cooper Interconnect’s MIL-DTL-55181 (MW
Series) power connectors are designed to meet the most stringent specifications while
withstanding the extreme range of environmental conditions encountered by ground
support equipment.
Resistant to contamination of dust, dirt, and water, these workhorse connectors also are
engineered to provide the ultimate resistance to shock and vibration via the center-locking
screw, which is easily secured by turning the mechanized fold-down, wing-blade handle.
Features and Benefits
Product Overview
QPL certified - The M55181 and MW connectors are government qualified per
MIL-DTL-55181.
Versatile Configurations – The M55181 series are available in 4-, 9- and 18-contact
versions, as plugs or receptacles. They support cable-to-cable, cable-to-panel, and jam nut
panel mounting.
Weatherproof - Heavy-duty gaskets and O-rings provide a watertight seal to prevent
moisture, dust and dirt contamination and maximize reliability.
Durable Construction – Time-tested, field-proven reliability for over 30 years. Corrosion-
resistant, aluminum alloy receptacles and high-impact solid brass plug construction resist
impact damage. Heat-tempered nosepiece is made of hardened alloy steel for enhanced
impact protection in the event of mishandling.
Superior Electrical Connections - Precision contacts are gold over copper or nickel
providing positive electrical connection with minimum voltage drop.
Easy to Use - Receptacle and plug mating is accomplished quickly and easily by turning a
center-locking, double lead screw with easy-to-grasp wing-blade handle. Vibration-
resistant, secure locking mechanism will not back out.
Reliable - Worry-free 500 mate/unmate cycle rating.
M55181 Plug
23 Front Street, Salem, NJ 08079 P: 856-935-7560 www.cooperinterconnect.com
6
M55181 Power Connectors
M55181 Connectors
Features Overview
M55181 Plug
Nut
Washer
Grommet
Spanner Nut
Cap Assembly
O-ring
O-ring
Nose Piece
Spanner Nut
Shell
7
23 Front Street, Salem, NJ 08079 P: 856-935-7560
M55181 Power Connectors
M55181 Connectors
ELECTRICAL
Dielectric Strength
4 Contacts 2000 Volts RMS
9, 18 Contacts 1500 Volts RMS
Insulation Resistance 1000 Megohms min. at 500 Volts DC
Voltage Drop
4 Contact 20 mV at 35 Amps
9, 18 Contact 25 mV at 7.5 Amps
MECHANICAL
Air Pressure 2.5 PSI
Water Immersion 6 ft., 48 hours
Durability 500 cycles with a coupling torque of 25 in.-lbs.
Contact Retention 10 lbs.
Insert Strength 400 lbs.
Specifications The MW connectors meet all
requirements of MIL-DTL-55181 for
the latest revision.
.90 REF.
2.47 REF.
Ø1.44 REF.
2 1/8 MAX.
CLOSED
1.450
MAX.
Plug Dimensions
MATERIALS AND FINISHES
SHELLS
Plugs Aluminum alloy body, steel alloy nosepiece 0.0003 cadmium plate with olive-drab
chromate.
Receptacles Brass, 0.0003 cadmium plate with olive-drab chromate.
Nose Pieces Alloy steel, 0.0003 cadmium plate with olive-drab chromate.
Draw Screws Stainless steel.
CONTACTS
Socket High-conductivity copper alloy with beryllium copper spring element, 0.000030
gold over 10-100 nickel.
Pin Yellow brass, 0.000030 gold over 50-100 nickel.
Insulator Glass-filled diallyl phthalate, type GDI-30 F or SDG-F.
23 Front Street, Salem, NJ 08079 P: 856-935-7560 www.cooperinterconnect.com
8
M55181 Power Connectors
M55181 Connectors
.90 REF.
2.47 REF.
Ø1.44 REF.
2 1/8 MAX.
CLOSED
1.450
MAX.
Plug Dimensions
M55181 Connectors (MW Series)
The MW connectors meet all
requirements of MIL-DTL-55181 for
the latest revision.
9
23 Front Street, Salem, NJ 08079 P: 856-935-7560
M55181 Power Connectors
M55181 Connectors
M 55181 / X - Y
Prefix, M = Military QPL version
Basic Specification
Configuration per sub-specification sheet per Table #1
Cable Size Designator (01 thru 05) per
Table #2
Ordering Information - Part Numbering System
TABLE #2
“Y” VALUE CABLE DIAMETER
(INCHES)
01 0.292 ± 0.005
02 0.323 ± 0.005
03 0.448 ± 0.005
04 0.511 ± 0.005
05 0.386 ± 0.005
TABLE #1
CI GENERAL
PART NUMBER
“X”
VALUE
TYPE MOUNT CONTACT
NUMBER
CONTACT
TYPE
AMPS CONTACT
SIZE
TERMINATION
M55181/1- Y* 1 Plug Cable 4 Socket 35 12 Turret
M55181/2- Y* 2 Receptacle Panel 4 Pin 35 12 Turret
M55181/3- Y* 3 Plug Cable 4 Pin 35 12 Turret
M55181/4- Y* 4 Receptacle Panel 4 Socket 35 12 Turret
M55181/5- Y* 5 Plug Cable 9 Pin 7.5 20 Solder Cup
M55181/6- Y* 6 Receptacle Panel 9 Socket 7.5 20 Solder Cup
M55181/7- Y* 7 Plug Cable 18 Pin 7.5 20 Solder Cup
M55181/8- Y* 8 Receptacle Panel 18 Socket 7.5 20 Solder Cup
GOVERNMENT DESIGNATION MANUFACTURER’S DESIGNATION NSN
M55181/1-01 MW10F(M)A11 5935006036952
M55181/1-02 MW10F(M)A13 5935012047312
M55181/1-03 MW10F(M)A17 5935009213399
M55181/1-04 MW10F(M)A19 5935012497559
M55181/1-05 MW10F(M)A15 5935013294190
M55181/2-01 MW20M(M)A00 5935013789152
M55181/3-01 MW10M(M)A11 5935012082345
M55181/3-02 MW10M(M)A13 5935011249341
M55181/3-03 MW10M(M)A17 5935011676095
M55181/4-01 MW20F(M)A00 5935011997156
M55181/5-01 MW10M(M)B11 5935011841460
M55181/5-02 MW10M(M)B13 5935011491162
M55181/5-03 MW10M(M)B17 5935010816484
M55181/6-01 MW20F(M)B00 5935008535942
M55181/7-01 MW10M(M)D11 5935011119956
M55181/7-02 MW10M(M)D13 5935011163608
M55181/7-03 MW10M(M)D17 5935008152325
M55181/7-04 MW10M(M)D19 5935013003701
M55181/7-05 MW10M(M)D15 5935013298690
M55181/8-01 MW20F(M)D00 5935001330394
*Cable diameter specification not applicable to receptacles.
23 Front Street, Salem, NJ 08079 P: 856-935-7560 www.cooperinterconnect.com
10
COTS GC55181 Power Connectors
COTS Connectors
For military and industrial power applications in harsh environments where cost
containment is more important than government certification, Cooper Interconnect’s
Commercial-Off-the-Shelf (COTS) version of the M55181 family provides the same
performance as the certified version of the M55181 power connectors, but at an
economical price.
Product Overview
Standard COTS GC55181
GC55181/1-AD1
COTS power connectors excel in the harshest conditions.
Features and Benefits
Value-Engineered Solution - Same performance as Cooper Interconnect’s MIL-DTL-55181
power connector family, but at a more economical price.
Configuration Options - Available in two primary configurations:
1. Standard COTS 55181 for seamless integration into M55181 type applications.
2. Cable adaptor COTS 55181 for a wide range of input cable configurations.
Rugged Construction - High-strength aluminum alloy maximizes corrosion resistance and
tempered nose piece minimizes damage from high impact forces. Provides weather and
waterproof seals for protection against environmental contaminants, with secure mating
options.
• Center-locking, double-lead screws allow easy, positive, and secure mating.
• Mounting flexibility for cable-to-cable, and cable-to-panel applications.
• Gold over copper
contacts provide positive,
efficient, electrical
connections.
• Worry-free, 500
mate/unmate cycle
rating.
Cap Assembly
O-ring
O-ring
Shell
Nose Piece
Spanner Nut
Nut
Washer
Grommet
11
23 Front Street, Salem, NJ 08079 P: 856-935-7560
COTS GC55181 Power Connectors
COTS Connectors
Features Overview
Standard COTS 55181
Spanner Nut
23 Front Street, Salem, NJ 08079 P: 856-935-7560 www.cooperinterconnect.com
12
COTS Connectors
COTS GC55181 Power Connectors
Specifications
ELECTRICAL
Dielectric Strength
4 Contacts 2000 Volts RMS
9, 18 Contacts 1500 Volts RMS
Insulation Resistance 1000 Megohms min. at 500 Volts DC
Voltage Drop
4 Contact 20 mV at 35 Amps
9, 18 Contact 21 mV at 7.5 Amps
MECHANICAL
Air Pressure 2.5 PSI
Water Immersion 6 ft., 48 hours
Durability 500 cycles with a coupling torque of 25 in.-lbs.
Contact Retention 15 lbs.
Insert Strength 400 lbs.
MATERIALS AND FINISHES
SHELLS
Plugs Aluminum alloy body, chemical film per MIL-C-5541.
Nose pieces Alloy steel, 0.0003 cadmium plate with olive-drab chromate.
Draw Screws Stainless steel.
CONTACTS
Socket High-conductivity copper alloy with beryllium copper spring element, 0.000030
gold over 10-100 nickel.
Pin Yellow brass, 0.000030 gold over 50-100 nickel.
Insulator Glass-filled diallyl phthalate, type GDI-30 F or SDG-F.
COTS GC55181 Adaptor
These power connectors are used
in ruggedized applications requiring
waterproofing and extended life for
communication equipment and
industrial instrumentation.
Specifications are for both COTS
and Adaptor versions.
13
23 Front Street, Salem, NJ 08079 P: 856-935-7560
COTS GC55181 Power Connectors
GC 55181 / X - Y
Prefix, GC = COTS
Basic Specification
Configuration per sub-specification sheet per Table #1
Cable Size Designator (01 thru 05) per Table #2
Ordering Information - Part Numbering System
TABLE #1
CI GENERAL
PART NUMBER
TYPE MOUNT CONTACT
NUMBER
CONTACT
TYPE
AMPS TERMINATION
GC55181/1- 03 Plug Cable 4 Socket 35 Turret
GC55181/3- 03 Plug Cable 4 Pin 35 Turret
GC55181/5- 03 Plug Cable 9 Pin 7.5 Solder Cup
GC55181/7- 03 Plug Cable 18 Pin 7.5 Solder Cup
COTS Connectors
COTS GC55181 Plug
GC55181/7-03
TABLE #2*
"Y" VALUE CABLE DIAMETER (INCHES)
01 0.292 ± 0.005
02 0.323 ± 0.005
03 0.448 ± 0.005
04 0.511 ± 0.005
05 0.386 ± 0.005
*COTS plugs mate with 55181 receptacles. See Receptacles section on page 22.
CI COTS PART NUMBER
GC55181/1-01
GC55181/1-02
GC55181/1-03
GC55181/1-04
GC55181/1-05
GC55181/3-01
GC55181/3-02
GC55181/3-03
GC55181/3-04
GC55181/3-05
GC55181/5-01
GC55181/5-02
GC55181/5-03
GC55181/5-04
GC55181/5-05
GC55181/7-01
GC55181/7-02
GC55181/7-03
GC55181/7-04
GC55181/7-05
23 Front Street, Salem, NJ 08079 P: 856-935-7560 www.cooperinterconnect.com
14
COTS Adaptors
COTS GC55181 Adaptors
Features Overview
Spanner Nut
Spanner Nut
Cap Assembly
Adaptor
O-ring
O-ring
Nose Piece
Shell
O-ring
COTS 55181 Adaptor
15
23 Front Street, Salem, NJ 08079 P: 856-935-7560
COTS Adaptors
COTS GC55181 Adaptors
GC55181 / X - ADY
Prefix, GC = COTS
Basic Specification
Configuration - per sub-specification sheet - Table #1
Cable adaptor designator (AD0, AD1, AD2, AD3) per Table #2
Ordering Information - Part Numbering System
TABLE #1
CI GENERAL
PART NUMBER
TYPE MOUNT CONTACT
NUMBER
CONTACT
TYPE
AMPS TERMINATION
GC55181/1- ADY Plug Cable 4 Socket 35 Turret
GC55181/3- ADY Plug Cable 4 Pin 35 Turret
GC55181/7- ADY Plug Cable 18 Pin 7.5 Solder Cup
TABLE #2
ADAPTOR
TYPE
DESCRIPTION CI PART NUMBER CECOM
NUMBER
SIMILAR TO
QPL PART
NUMBER
ADAPTOR
ID
(INCHES)
ADAPTOR
OD
(INCHES)
AD0 Base Only
GC55181/1-AD0 A3316635-4 M55181/1
n/a n/aGC55181/3-AD0 A3316636-4 M55181/3
GC55181/7-AD0 A3316634-4 M55181/7
AD1
Base + AD1 Adaptor
GC55181/1-AD1 A3316635-1 M55181/1
0.203 0.303
GC55181/3-AD1 A3316636-1 M55181/3
GC55181/7-AD1 A3316634-1 M55181/7
AD1 Adaptor Only 33-18 n/a n/a
AD2
Base + AD2 Adaptor
GC55181/1-AD2 A3316635-3 M55181/1
0.297 0.397
GC55181/3-AD2 A3316636-2 M55181/3
GC55181/7-AD2 A3316634-2 M55181/7
AD2 Adaptor Only 33-19 n/a n/a
AD3
Base + AD3 Adaptor
GC55181/1-AD3 A3316635-3 M55181/1
0.390 0.490
GC55181/3-AD3 A3316636-3 M55181/3
GC55181/7-AD3 A3316634-3 M55181/7
AD3 Adaptor Only 33-20 n/a n/a
GC55181/1-AD2
GC55181/7AD3
GC55181/3-AD3
*COTS plugs mate with 55181 receptacles. See Receptacles section on page 23.
COTS 55181 Adaptors
33-18
33-19
33-20
23 Front Street, Salem, NJ 08079 P: 856-935-7560 www.cooperinterconnect.com
16
COTS Adaptors
Product Ordering by CECOM Number
CI COTS PART
NUMBER
CI QPL PART NUMBER CABLE DIAMETER
(INCHES)
ADAPTOR THROUGH
DIA. (INCHES)
CECOM
NUMBER
EXPORT
EQUIVALENT
GC55181/1-AD2 M55181/1-03
0.390 0.297 A3014039-1
0.420 0.297 A3014040-2 8164396-2
0.395 0.297 A3014041-1 8163430-1
0.395 0.297 A3014042-1
0.435 0.297 A3014043-1
0.435 0.297 A3154857-1
0.435 0.297 A3191153-2
0.420 0.297 A3014040-5
0.435 0.297 A3014043-6
0.400 0.297 A3014040-4 8164396-4
GC55181/3-AD2 M55181/3-03
0.420 0.297 A3014040-2 8164396-2
0.435 0.297 A3154857-1
0.420 0.297 A3014040-5
0.400 0.297 A3014040-4 8164396-4
GC55181/7-AD1 M55181/7-03
0.400 0.203 A3014038-14 8164394-14
0.400 0.203 A3014038-8
0.430 0.203 A3014038-8 8164394-8
0.435 0.297 A3014044-6
0.435 0.297 SM-D-415553
0.435 0.297 A3014044-1
GC55181/3-AD3 For Larger Cable Diameters As Req'd. .593 0.390
GC55181/7-AD3 For Larger Cable Diameters As Req'd. .593 0.390
GC55181/1-AD0 Connector without cable adaptor n/a n/a
GC55181/3-AD0 Connector without cable adaptor n/a n/a
GC55181/7-AD0 Connector without cable adaptor n/a n/a
COTS GC55181 Adaptors
17
23 Front Street, Salem, NJ 08079 P: 856-935-7560
55181 Power Connectors
COTS Adaptors
COTS GC55181 Adaptors
CECOM CROSS REFERENCE TO CI PART NUMBER
CECOM
CABLE
NUMBER
USE CI PART NUMBER CECOM CONNECTOR
NUMBER
SIMILAR TO QPL
PART NUMBER
CABLE
DIAMETER
(INCHES)
ADAPTOR
THROUGH
DIA. (INCHES)
EXPORT
EQUIVALENT
A3014038-14 GC55181/7-AD1 A3316634-1 M55181/7-03 0.400 0.203 8164394-14
A3014038-8 GC55181/7-AD1 A3316634-1 M55181/7-03 0.400 0.203
A3014038-8 GC55181/7-AD1 A3316634-1 M55181/7-03 0.430 0.203 8164394-8
A3014039-1 GC55181/1-AD2 A3316635-2 M55181/1-03 0.390 0.297
A3014040-2 GC55181/1-AD2 & GC55181/3-AD2 A3316635-2 & A3316636-2 M55181/1-03 & M55181/3-03 0.420 0.297 8164396-2
A3014040-4 GC55181/1-AD2, & GC55181/3-AD2 A3316635-2 & A3316636-2 M55181/1-03 & M55181/3-03 0.400 0.297 8164396-4
A3014040-5 GC55181/1-AD2 & GC55181/3-AD2 A3316635-2 & A3316636-2 M55181/1-03 & M55181/3-03 0.420 0.297
A3014041-1 GC55181/1-AD2 A3316635-2 M55181/1-03 0.395 0.297 8163430-1
A3014042-1 GC55181/1-AD2 A3316635-2 M55181/1-03 0.395 0.297
A3014043-1 GC55181/1-AD2 A3316635-2 M55181/1-03 0.435 0.297
A3014043-6 GC55181/1-AD2 A3316635-2 M55181/1-03 0.435 0.297
A3014044-1 GC55181/7-AD2 A3316634-2 M55181/7-03 0.435 0.297
A3014044-6 GC55181/7-AD2 A3316634-2 M55181/7-03 0.435 0.297
A3154857-1 GC55181/1-AD2 & GC55181/3-AD2 A3316635-2 & A3316636-2 M55181/3-03 & M55181/1-03 0.435 0.297
A3191153-2 GC55181/1-AD2 A3316635-2 M55181/1-03 0.435 0.297
SM-D-415553 GC55181/7-AD2 A3316634-2 M55181/7-03 0.435 0.297
Product Ordering - Communications Electronics Command (CECOM) Cross Reference
*COTS plugs mate with 55181 receptacles. See Receptacles section on page 23.
GC55181/3-AD1
23 Front Street, Salem, NJ 08079 P: 856-935-7560 www.cooperinterconnect.com
18
UW Connectors
UW Power Connectors
UW Connectors
Draw Screw Assembly
Screw
Turret Terminal
Nose Piece
Gasket
Cap
Grommet
Shell
Washer
Adaptor Nut
Insert
19
23 Front Street, Salem, NJ 08079 P: 856-935-7560
55181 Power Connectors
UW Connectors
UW Power Connectors
The UW connectors meet all requirements of MIL-DTL-12520 for the latest revision. These
connectors are rugged, proven reliable, and are designed for power and control
interconnections. Featured is a center-locking, double-lead screw for maximum reliability,
with a fold-down, wing-blade handle. They are waterproof and can withstand the extreme
range of environmental conditions encountered by ground support equipment.
UW Connectors
Features and Benefits
Versatile Configurations – Available in three plug shell sizes styles (small round, small
cathedral and large cathedral). The UW series available in 4-, 9-, 14-, 19- and 30-contact
versions configured to support cable-to-cable, cable-to-panel, and jam nut panel mounting.
Weatherproof - Heavy-duty gaskets and O-rings provide a watertight seal to prevent
moisture, dust and dirt contamination and maximize reliability.
Durable Construction – Time-tested, field-proven reliability for over 30 years. Corrosion-
resistant, aluminum alloy receptacles and high-impact solid brass plug construction resist
impact damage. Heat-tempered nose piece is made of hardened alloy steel for enhanced
impact protection in the event of mishandling.
Superior Electrical Connections - Precision contacts are gold over copper or nickel
providing positive electrical connection with minimum voltage drop.
Easy to Use - Receptacle and plug mating is accomplished quickly and easily by turning a
center-locking, double lead screw with easy-to-grasp wing-blade handle. Vibration-
resistant, secure locking mechanism will not back out.
Reliable - Worry-free 500 mate/unmate cycle rating.
UW Connectors
UW Connectors
UW power connectors support military
communication systems.
23 Front Street, Salem, NJ 08079 P: 856-935-7560 www.cooperinterconnect.com
20
UW Power Connectors
UW Connectors
ELECTRICAL
Dielectric Strength
4, 9 & 14 Contacts 2800 Volts RMS
19 Contacts 2000 Volts RMS
Insulation Resistance 1000 Megohms min. at 500 Volts DC
Voltage Drop
4 Contact 20 MV at 35 Amps
9, 19 Contact 21 MV at 20 Amps
MECHANICAL
Air Pressure 2.5 PSI
Water Immersion 6 ft., 48 hours
Durability 500 cycles with a coupling torque of 25 in.-lbs.
Contact Retention 15 lbs.
Insert Strength 400 lbs.
Specifications
2.500
REF.
.550
INLET
1.458
REF.
A
H
E
F
J
K
D
C
B
1 1/2 MAX.
1 15/16 MAX. REF.
31/32
1 15/16 MAX.
CLOSED
UW 1220 Plug
UW 1320 Plug
UW Connector Rear View
21
23 Front Street, Salem, NJ 08079 P: 856-935-7560
UW Power Connectors
UW Connectors
TABLE 2
"XX" VALUE CABLE
DIAMETER
(INCHES)
NUMBER OF
CONTACTS
11 0.292 to
0.343 4, 9
13 0.323 to
0.406 4, 9
15 0.386 to
0.486 4, 9
17 0.448 to
0.531 4, 9
19 0.511 to
0.593
4, 9, 14, 19,
30
21 0.573 to
0.656
4, 9, 14, 19,
30
23 0.636 to
0.718 14, 19, 30
25 0.698 to
0.781 14, 19, 30
27 0.761 to
0.843 14, 19, 30
UW 1220 M A XX
Series Designation
Shell Style per Table 3
Number of Contacts (A - E) per Table 3
Contact Type ("M" denotes pin contacts, "F" socket contacts)
Cable Size Code (11 - 27) per Table 2
Ordering Information
TABLE 3
CONTACTS DESIGNATION SHELL STYLE DESIGNATION
A = 4 1220 Round Plug
B = 9 1320 Small Cathedral Plug
C = 14 1326 Large Cathedral Plug
D = 19 2020 Small Receptacle
E = 30 2026 Large Receptacle
TABLE 1
CI PART
NUMBER
STYLE CONTACT TYPE MOUNTING
STYLE
NUMBER OF
CONTACTS
(CODE LETTER)
CONTACT
SIZE
UW1220FAXX
Round Plug
Socket
Cable
4 (A)
12
UW1220FBXX 9 (B)
UW1220MAXX Pin 4 (A)
UW1220MBXX 9 (B)
UW1320FAXX
Small Cathedral Plug
Socket 4 (A)
UW1320FBXX 9 (B)
UW1320MAXX Pin 4 (A)
UW1320MBXX 9 (B)
UW1326FCXX
Large Cathedral Plug
Socket
14 (C) 16
UW1326FDXX 19 (D)
UW1326FEXX 30 (E) 20
UW1326MCXX
Pin
14 (C) 16
UW1326MDXX 19 (D)
UW1326MEXX 30 (E) 20
UW2020FA00
Small Receptacle
Socket
Panel
4 (A)
12
UW2020FB00 9 (B)
UW2020MA00 Pin 4 (A)
UW2020MB00 9 (B)
UW2026FC00
Large Receptacle
Socket
14 (C) 16
UW2026FD00 19 (D)
UW2026FE00 30 (E) 20
UW2026MC00
Pin
14 (C) 16
UW2026MD00 19 (D)
UW2026ME00 30 (E) 20
23 Front Street, Salem, NJ 08079 P: 856-935-7560 www.cooperinterconnect.com
22
Receptacles
Power Receptacles
Features Overview
Insert Assembly
Gasket Shell
O-Ring
Spanner Nut
M55181/2-01 Rear View
23
23 Front Street, Salem, NJ 08079 P: 856-935-7560
Receptacles
Power Receptacles
Receptacles are available for all
mid-range Power Connectors.
M55181 Receptacles support Mil-
Spec and COTS versions of the
55181 Power Connector Family.
UW Receptacles support the UW
Plugs.
Consult factory for your specific
needs.
M55181/2-01
M55181/4-01
M55181/6-01
M55181/8-01
23 Front Street, Salem, NJ 08079 P: 856-935-7560 www.cooperinterconnect.com
24
Power Receptacles
Receptacles
M
W
2
0
M
(
M
)
A
0
0-1
B
A
C
D
.470
.
466
.470
.466
.235
.233
.235
.233
Ø1.468
#10-32NS-2A
DOUBLE LEAD
1 1/4-18NEF-2A
1
0
-
2
/
1
8
1
5
5
M
MW Receptacle
MW Receptacles fit all COTS
versions of the power plugs.
Representative sample shown.
Consult factory.
M55181/8-01
M55181/2-01
MW RECEPTACLES
CI GENERAL
PART NUMBER
NUMBER OF
CONTACTS
CONTACT
TYPE
AMPS
CONTACT
CONTACT
SIZE
TERMINATION MOUNT MATES WITH PLUGS
M55181/2- 01
4
Pin
35 12 Turret
Panel
M55181/1-, GC55181/1-series
M55181/4- 01
Socket
M55181/3-, GC55181/3-series
M55181/6- 01 9
7.5 20 Solder Cup
M55181/5-series
M55181/8- 01 18 M55181/7-, GC55181/7-series
Rear View
Front View
25
23 Front Street, Salem, NJ 08079 P: 856-935-7560
55181 Power Connectors
Power Connectors
Power Receptacles
Receptacles
M
0
2
0
B C
2
W
U
A
A
D
0
0
1.182 REF.
Ø1.469 REF.
U
W
2
0
2
6
F
D
0
0
E
F
HT
U
V
WLM
N
P
R
S
D
C
B
A
K
J
EF
H
J
K
A
B
C
D
RST
U
V
W
L
M
N
P
UW Receptacles
Representative sample shown.
Consult factory.
UW2020MA00
UW2026FD00
UW RECEPTACLES
CI PART NUMBER NUMBER OF CONTACTS TYPE CONTACT TYPE CONTACT SIZE MOUNT MATES WITH PLUG
UW2020FA00 4
Small Receptacle
Socket
12
Panel
UW1220, UW1320 series
UW2020FB00 9
UW2020MA00 4
Pin
UW2020MB00 9
UW2026FC00 14
Large Receptacle
Socket 16
UW2026 series
UW2026FD00 19
UW2026FE00 30 20
UW2026MC00 14
Pin
16
UW2026MD00 19
UW2026ME00 30 20
Rear View
23 Front Street, Salem, NJ 08079 P: 856-935-7560 www.cooperinterconnect.com
26
Power Connectors
27
23 Front Street, Salem, NJ 08079 P: 856-935-7560
Power Connectors
Cooper Interconnect
222 Williams Street
Chelsea, MA 02150
P: 617-889-3700
F: 617-889-6980
Cooper Interconnect
4758 Washington Street
LaGrange, NC 28551
P: 252-566-3014
F: 252-566-9337
Cooper Interconnect
5455 Endeavour Court
Moorpark, CA 93021-8009
P: 805-553-9633
F: 805-553-9655
Cooper Interconnect
23 Front Street
Salem, NJ 08079
P: 856-935-7560
F: 856-935-0102
Cooper Interconnect
750 West Ventura Boulevard
Camarillo, CA 93010
P: 805-484-0543
F: 805-987-5062
Printed in USAReorder #CI-551810409
Cooper Industries, Ltd.
600 Travis, Ste. 5800
Houston, TX 77002-1001
P: 713-209-8400
www.cooperindustries.com
Cooper Interconnect
Wolf & 7th North Streets
PO Box 4999
Syracuse, NY 13221-4999
P: 315-477-7000
F: 315-477-5717
www.cooperinterconnect.com
email info@cooperinterconnect.com
Cooper Interconnect is a trademark of Cooper Industries, Inc.
©2009 Cooper Industries, Inc.
55181 Power Connectors are Manufactured at
