ITT has a long history of providing standard and custom MIL-DTL-38999 connectors which meet the most stringent military requirements.
ITT’s major military and commercial accounts recently approached us requesting that we take our proven high reliabilty designs and shrink them
to decrease weight and size while maintaining the connectors robust environmental performance and high reliability. Along with these requests,
ICS received substantial commentary from other markets including Medical, Industrial, and Space, requesting a similar, miniature circular product.
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MKJ connector provides significant size
and weight reduction while providing
electrical and mechanical characteristics
of larger connectors
Split tine contact design provides proven
reliability in harsh environments
Connector uses size 23 contacts
accepting #22 to #28 wire. Contact
spacing is reduced to 0.076 inches
providing a compact yet robust package.
Mini Circular
Master key and 2 secondary keys allow
multiple clocking positions
Pogo pin/pad technology. Touch pad
contacts increase ease of cleanability,
highly desireable in harsh environments.
Intergral band platform allows direct
attachment of cable shield to connector.
Double start threads prevent thread
damage and allow full connector mating
in 1.5 turns. Durable design ideal for
harsh shock and vibration environments.
Breakaway design incorporates a simple
push/pull mating mechanism allowing
quick connector disconnect.
The ITT Solution …
ITT took on the challenge, driving innovation in mating capabilities and contacts to reduce size and weight while maintaining the high
level of quality customers have come to expect from ITT over 90 years of engineering excellence. ITT collated a substantial amount of industry
VOC from top tier military and commercial accounts. This feedback arrived from industry leading ICS customers, pioneering products in
their fields including satellites & missiles, test and medical equipment, and tactical battlefield gear. Using this information and leveraging
our historical product expertise, ITT engineered a product meeting our customers defined mix of Design, Functionality, and Flexibility. The
result of this process represents our innovative new product line, Trinity. Offering three coupling methodologies {threaded, bayonet, and
breakaway} and a highly engineered design, this innovative product reduces weight and size without sacrificing robust environmental
performance or reliability. ITT ICS is proud to introduce our exciting new Trinity product line, engineered to the stringent quality
standards for which ITT is world renown.
Dimensions shown in inches (mm)
Specifications and dimensions subject to change
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www.ittcannon.com
MKJ Series Connectors
Technical overview
The Trinity MKJ family of mini circular connectors provides approximate electrical and mechanical characteristics of larger and heavier
Military Standard Environmental connectors while reducing weight up to 71% and size up to 52%. All MKJ series connector’s shells
and jam nuts are available in high quality aluminum alloy or corrosion resistant steel per AMS-QQ-S 763. The MKJ series comes with
rear accessory thread or integral band platform for direct attachment of cable shield and overmold. The MKJ series of connectors come
with a variety of coupling mechanisms: threaded, breakaway, and bayonet. In addition, a Pogo Pin technology utilizing ITT’s unique
spring probe pin/touch pad contact system is available. The MKJ series receptacle comes with a variety of mounting options for both
crimp and PCB contacts including in-line, jam nut, front mount, and square flange mount, and flange mount. The MKJ0, MKJ1, MKJ3,
MKJ4, and MKJ5 feature a master key and 2 secondary keys for positive mating with 4 clocking positions available. The MKJ0 connec-
tor is ideal for everyday operations where size and weight are at a premium. The MJK1 connector uses a double start thread coupling
with 1/1/2 turns for a full mate and is ideal for harsh shock and vibration environments. The MKJ3 connector can be fully mated in a
1/4 turn. The MKJ4 connector provides a quick push to mate / pull to unmate disconnect mechanism for fast breakaway connections.
The MKJ5 connector utilizes a triple start thread and is fully mated in 1 turn, and is an ideal connector for harsh shock and vibration
environments and offers an internal coupling ratchet mechanism along with an EMI grounding spring.
Product Features
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High contact density: size 23 contacts accommodate
#22 - #28 wire and allowing 0.076 inch contact spacing
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Available with 3-85 rear release crimp or PCB contacts
•
Master key with 2 secondary keys. 4 clocking positions available
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Significant weight and size reduction compared to traditional
Mil Standard environmental connectors
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Available in jam nut, in-line, and square flange rear crimp
receptacle versions. Jam nut and square flange PCB receptacle
versions
•
Rear accessory thread or integral band platform for direct
attachment of cable shield or overmold
•
Wire seal grommet for rear environmental sealing.
Pin fluorosilicone interfacial seal provides interface sealing
•
Available with double start threads allowing full mating in
1.5 turns
•
Available with quick push/pull breakaway mechanism utilizing
canted retention spring for quicker mating and demating
•
Available with bayonet 1/4 turn locking mechanism
•
Available with Pogo Pin technology utilizing ITT’s unique spring
probe pin/pad contact system
Applications
Medical equipment: test and diagnostic
Industrial equipment
Commecial and militray aircraft electronics
Unmanned aerial vehicles
Missile systems
Avionic systems
Satellites
Sensors
Instrumentation
Interconnections for helmets, weapons, battery packs,
night vision goggles, aircraft headsets, etc.
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Navigation and Telemetry equipment
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Ruggedized computers and hand held communications equipment
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Mini Circular
Dimensions shown in inches (mm)
Specifications and dimensions subject to change
www.ittcannon.com
B-31
MKJ Series Connectors
MKJ0
MKJ Connector Styles
MKJ3
UNC Thread
Coupling
Bayonet Coupling
MKJ1
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Mini Circular
MKJ4
Double Start Thread
Coupling
MKJ5
Breakaway Coupling
Triple Start Ratchet
Locking
Multiple Styles for all applications!
Series MKJ Performance
#23 / 0.076 inches (1.9 mm)
Solder Cup, Rear Crimp or PCB Mount
#22 - #28 AWG
5 Amps Maximum
500 VAC RMS Sea Level
5000 Megaohms Minimum
-55 degrees C to +150 degrees C
8 Milliohms Maximum
20 g’s in Accordance with MIL-STD-1344 Method 2005, Condition IV
300 g’s (MKJ1) 50 g’s (MKJ0 and MKJ4) in Accordance with
MIL-STD-1344 Method 2004, Condition E
40dB Attenuation, 100 MHz to 1000 MHz
Threaded, Quick Disconnect Pogo Pin
Master key and 2 secondary keys. 4 clocking positions available
Aluminum and Stainless Steel
31 layouts holding from 1 size 12 contact to 85 size 23 contacts
Medical, Military, Commercial, and Industrial
Jam Nut, Square Flange, In-line, PCB
Dimensions shown in inches (mm)
Specifications and dimensions subject to change
Contact size / Spacing
Contact Type
Wire Accomodation
Current Rating
Voltage Rating
Insulation Resistance
Operating Temperature
Contact Resistance
Vibration
Shock
EMI Shielding Effectiveness
Coupling
Coding
Housing material
Layouts
Usage
Receptacle Mounting
B-32
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MKJ Series Connectors
Electrical specifications for the connector
The MKJ series of products uses size 23 pin and socket contacts with equivalent electrical performance of size 22 contacts. These smaller contacts accept
#22 - #28 AWG wire and allow the contact spacing to be reduced down to 0.076 inches. The connector’s Fortron dielectric insulating material can accom-
modate from 3 to 85 contacts in various shell sizes. This high density packaging, along with a reduced wall thickness and scoop, allows a dramatic decrease
in size and weight of the MKJ connector while retaining the approximate mechanical and electrical characteristics of heavier and larger Military Standard
Enviromental connectors. The connector is capable of operating between -55 degrees Celsius and +150 degrees Celsius and can be mated up to 2,000
cycles. Maximum electrical current is 5 Amps and maximum voltage at sea level is 500 VAC RMS.
