AT Circular Connector Series Datasheet

Amphenol Industrial Operations introduces a 3 and
5-pole plug to enhance its AT Circular connector
series. AT Circular plugs feature Amphenol’s AT contact
technology and are designed to perform in the demanding
applications found on construction and farm equipment,
plus truck environments. The AT Circular series is a molded
thermoplastic connector with a positive bayonet retention
system and sealed by redundant grommet wire sealing.
The square flange design ensures a drop in replacement
to existing panel designs and the jam nut version makes
for easy installation. The 9 pin black receptacles are in
accordance with the interface of the J1939 diagnostic
AT Contact technology is already used successfully at
major OEM’s and features machined contacts with both
Nickel and Gold plating.
• Jam Nut and Square Flange Mounting Solutions
Quick Mating and Unmating - Reverse Bayonet Coupling
Environmentally Sealed - Sealed against moisture and
Contact retention system which decreases installation costs
and increases reliability
RoHS Compliant Product
Amphenol AT Circular Connector Series
For further information on your individual application requirements, contact: Amphenol Corporation
North America:
Amphenol Industrial Operations
180 N. Freeport Drive, Plant 4
Nogales, AZ 85621
Tel: (888) 364-9011
Fax: (520) 285-5134
Amphenol Industrial Operations Europe
Via Barbaiana 5
1-20020 Lainate (MI) Italy
Tel: +39 02 93254.204
Fax: +39 02 93254.444
Middle East:
Amphenol Middle East Enterprises FZE
Office C-37 PO Box 21107
Ajman Free Zone, UAE
Tel: +9 716-7422494
Fax: +9 716-7422941
Amphenol Technology (Zhuhai) Co., Ltd.
No. 63 Xing Han Road, San Zao Town
Jin Wan District, Zhuhai City, China 519040
Tel: +86 756-3989760
Fax: +86 756-3989768
Material Specification
Receptacle Square Flange Thermoplastic
Grommet seal Neoprene Rubber: 3 and 5 pin
Silicone Rubber: 9 pin
Contact (AT Series) Copper Alloy
(Nickel and Gold plating available)
Electrical Specification based on AT Machined Contacts
Dielectric Withstanding Voltage
(Test Voltage)
Current leakage less than 2
milliamps at 1500 VAC
Current Rating at 125ºC 13A
Contact Millivolt Drop 60 (AWG 16 Wire, 13A)
Insulation Resistance 1000 megaohms min. at 25ºC
Mechanical Specifications
Operating Temperature Range -55ºC to +125ºC
Durability(Mating Cycle) No electrical or mechanical defects after 100 cycles of engagement or disenagement
Corrosion Resistance Connectors show no evidence of corrosion after exposure to 48 hours of salt spray per MIL STD 1344 method 1001
Moisture Resistance Water does not penetrate seals when submerged in 3 feet of water
Fluid Resistance Connectors show no damage when exposed to most fluids used in industrial applications
Thermal Shock -40º/+125ºC, 100 cycles, 1 hour per cycle
Crimp Tensile Strength 25 lbs
Maintains continuity and exhibits no mechanical or physical damage during or while subject to sinusoidal vibration, having an amplitude of
.060 inches double amplitude and the frequency varied linearly between limits of 10 to 2000 to 10 Hz with a
maximum force of 20g’s. No electrical discontinuities longer than 1 microsecond
Physical Shock No unlocking, unmating or other unsatisfactory result during or after 50g’s in each of three mutually perpendicular planes.
No electrical discontinuities longer than 1 microsecond. MIL STD 202, Method 213, Condition “C“
How to Order Contact and Accesories
PN Description
AT0-202-16141 Machined size 16 Pin Contact, nickel plating
AT2-201-16141 Machined size 16 Socket Contact, nickel plating
AT0-202-1631 Machined size 16 Socket Contact, gold plating
AT2-201-1631 Machined size 16 Socket Contact, gold plating
1 2 3 4 5
ATC 10 9-1939 P N
Product Line Shell Style Arrangements Contracts Wire Size
Small Flange Jam
Nut Receptacle
(includes jam nut)
3-16, 5-16, 9-1939
P for Pin
Only for
N for ø0.0 51 inch
10 Square Flange
S for Socket
Only for Plug E for ø 0.0 35 inch
11 Round Nut
16 (for Arrangements
3-16 & 5-16 only)
17 Jam Nut Receptacle
(exclude jam nut)
How to Order Contact and Accesories
Part Number Description
ATC10- RC3C Cap with lanyard for size 3 square flange receptacle
ATC10- RC3 Cap less lanyard for size 3 receptacle
ATC10- RC5C Cap with lanyard for size 5 square flange receptacle
ATC10- RC5 Cap less lanyard for size 5 receptacle
ATC10- RC9C Cap with lanyard for size 9 square flange receptacle
ATC10- RC9 Cap less lanyard for size 9 receptacle
ATC10- RC9L Cap with lanyard for size 9 jam nut receptacle
ALHN-19 Hex nut for ATC-17-9-1939PN
ASR9-1939 Strain relief for small flange J1939 receptacle
AWS9-1939 Wave spring for small flange J1939 receptacle
Required Tools:
Crimp Tool: DMC AF8 M22520/1-01
Contact Insertion/Removal Tool: Amphenol C10-731509-161