H24 Aviation plug with four hole seat

H24 Aviation Plug with four hole seat

As we all know, aviation plug belongs to a connector, originated from the military industry, aviation industry, so its name. It is widely used in various electrical circuits because of its convenient insertion, many kinds of choice, easy to distinguish signals, solid connection and stable signal transmission. So today we will understand the mechanical properties of the aviation Waterproof Plug.

Introduction to mechanical properties of waterproof connectors for aviation plugs

The influence of mechanical properties on the reliability of navigation plug is very key, choose a suitable for their own equipment, not only to choose the electrical performance of the product, but also to choose the product suitable for their own use environment, the two must complement each other.

Additive force is one of the most important mechanical properties of single connection. Navigation plug-in is usually used with the equipment, and the equipment often vibrates due to its own factors or environmental influences, which will cause navigation plug-in fretting and fretting corrosion effect, and seriously cause the contact body to form resonance with the equipment, or even the connection failure caused by the reduction of the effective contact surface of the contact body. Vibration also increases the dynamic contact resistance of the contact. And we'll talk a little bit more about the aero-thrusting anti-vibration method.

Introduction to mechanical properties of circular connectors for aviation plugs

No mechanical damage or degradation of electrical performance standards can occur in navigation and insertion. There is a misconception that the plug and pull times marked on the specification are mainly the critical value of mechanical damage. In fact, the damage of mechanical properties is not so easy, especially the contact body, which is usually made of copper alloy, and its wear resistance is enhanced by electroplating. The value of plug and pull times is usually the critical value of electrical performance decline until failure caused by insufficient positive contact pressure. But the reason for this failure is mechanical, so we classify it as mechanical life.

The electrical equipment characteristics of navigation plug mainly include contact resistance, grounding resistance and compressive strength, etc. The order of magnitude varies from hundreds to thousands of megohm. As the name implies, the insertion force and the separation force of the contact body. The size of inserting and pulling force is determined by the design and manufacturing process of the contact body. If the inserting and pulling force is too large, the insertion needle will not be in place, and the contact part of the contact body will be worn and deformed, which will lead to contact failure in the long term. If the insertion and withdrawal force is too small, the positive pressure of the contact part becomes smaller, and the contact resistance correspondingly increases. The electrical performance is not up to the standard due to the decreased conduction capacity, which is also regarded as invalid contact. According to statistics, the contact failure caused by the insertion and withdrawal force accounts for 45.1% of the total failures of the navigation and insertion contacts. Inserting and pulling force not only directly affects the electrical performance of avionics contact, but also affects the reliability of avionics products in vibration, impact and other environments. It is also the guarantee of flexible and convenient use of air plug. The more the number of cores, the higher the design requirements of plug and pull force.

Materials, processes and surface treatments
Contact part
Material: Male needle: Brass HPB59-1; Female needle: phosphor bronze QSN4-3.
Production process: machining
Finish: Gold plated, thickness 4u"
Waterproof Plug

shell
Material: Engineering plastic PBT
Production process: injection molding
Circular Waterproof Connector

Insulating part
Material: High performance plastic PA66
Production process: injection molding
Color: Black

Circular Connector

Waterproof Connector technical parameters

Pin Layout
Number of cores	3 core	4 core	10 core	12 core	19 core	24 core
Rated current	25A		10A		5A
Operating voltage	500V		400V		150V
Withstand voltage	2500V		2500V		1500V
Contact impedance	<1.0mΩ		<2.5mΩ		<5.0mΩ
Temperature rise	25A 30℃ ↓； 30A 40℃ ↓；35A 50℃ ↓		10A 30℃ ↓； 12A 40℃ ↓；15A 50℃ ↓		5A 30℃ ↓； 7A 40℃ ↓；10A 50℃ ↓
Contact part	Φ3.0*3	Φ3.0*4	Φ1.5*10	Φ1.5*12	Φ1.0*19	Φ1.0*24
Insertion and withdrawal force	4.5N Max.	6.0N Max.	14N Max.	16N Max.	19N Max.	22N Max.
Mechanical life	1700 times
Torque of thread	42-53（N.m） Torque Wrench 200 (N.m)
Temperature and humidity	-40 ℃ ~ +80 ℃
vibration	Frequency :5~200Hz, amplitude :5mm, speed :10m/s, 0.10us without instant circuit break
Impact resistance	294m/s2
Salt spray	PH6.5-7.2, NaC1,5% 48H
Wire gauge	2.5-4m㎡/12-14AWG		1.0-1.5m㎡/16-18AWG		0.3-0.5m㎡/22-20AWG
Applicable wire diameter OD	Applicable OD range (Φ9-Φ14) mm
Waterproofing class	Ip67
Certification standard	Comply with TUV and UL certification standards

Dimensions of aviation socket