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J20J Series Micro-Rectangular Electrical Connectors — High-Density, Miniaturized, High‑Reliability Precision Connectors
Classification:
Release time:
2026-09-16 15:55
The J20J series micro‑rectangular electrical connector is a high‑density, miniaturized, and highly reliable precision electrical interconnect device, widely used in aerospace, automotive, and high‑end electronic equipment applications. Featuring a classic “twisted‑pin” design, it supports multiple interface types, including crimp‑on, straight‑insert PCB‑mount, right‑angle PCB‑mount, and surface‑mount PCB‑mount configurations. Available in a range of pin counts from 9 to 100, it meets the demanding requirements of compact, high‑channel‑count signal transmission.
J20J Series Micro-Rectangular Electrical Connectors
I. Product Overview
The J20J series micro‑rectangular electrical connectors are high‑density, miniaturized, and highly reliable precision electrical interconnects, widely used in the aerospace, defense, and high‑end electronic equipment sectors, serving as the “neural hub” for signal and power transmission.
This product series employs a fixed mating configuration with a header‑mounted pin and a socket‑mounted receptacle. The plug and socket ends are mated and locked by screw‑nut fastening, offering smooth insertion and removal as well as reliable locking performance.
Model and specification coverage: Provided 9, 15, 21, 25, 31, 37, 51, 66, 74, 100 cores and various specifications to meet diverse cabling density requirements; the product lineup includes Crimp-type, through-hole printed circuit board type, right-angle through-hole printed circuit board type, and surface-mount printed circuit board type and various structural configurations, meeting the product‑use requirements of different scenarios.
This product is the first of its kind developed by our company and has been granted a related authorized patent (Patent No.: CN201820874192.2、CN201820874013.5 ).
II. Product Performance
| Parameter | Indicator |
|---|---|
| Ambient temperature | -55℃ to +125℃ |
| Vibration | 10 Hz to 2000 Hz, 196 m/s² |
| Random Vibration | Power spectral density: 0.4 G²/Hz; total root-mean-square acceleration: 23.1 G. |
| Impact | 980 m/s² 6 ms |
| Rated current | 2A |
| Contact resistance | ≤ 15 mΩ |
| Insulation resistance | ≥ 5000MΩ 300V DC |
| Dielectric withstand voltage | 500V |
| Mechanical life | 500 times |
III. Product Features
1. Contact Structure
The plug end employs flexible pins, while the socket end features a rigid receptacle structure. The flexible pins are of the classic design… "Twisted Needle" Design It is constructed by twisting together three inner strands and nine outer strands of beryllium‑bronze wire, with a gold‑plated exterior. When inserted into the socket, it establishes multi‑point contact, ensuring stable contact resistance even under severe vibration and shock, thereby effectively preventing momentary interruptions.
2. High-Density Miniaturized Design
The product features a contact pitch of 0.95 mm and a row pitch of 1.01 mm, with dimensions and performance falling between those of the J30J and J63A series. Within extremely constrained PCB and enclosure spaces, it effectively addresses the challenge of consolidating complex signal transmission, making it an ideal choice for lightweight devices.
| Series | Rated current | Insulation resistance | Dielectric withstand voltage |
|---|---|---|---|
| J20J | 2A | ≥5000MΩ, 300V DC | 500V |
| J63A | 1A | ≥5000MΩ, 100V DC | 800V |
| J30J | 3A | ≥5000MΩ, 500V DC | 250V |
3. High-strength metal housing
The enclosure is made of high‑strength aluminum alloy and features a chemically nickel‑plated surface, providing excellent electromagnetic interference (EMI) shielding while also withstanding harsh environmental conditions such as high and low temperatures, salt spray, and severe vibration.
4. Reliable locking mechanism
The head and base are joined via a screw-and-nut threaded connection, ensuring smooth insertion and removal, reliable locking, and effective prevention of accidental disengagement caused by vibration or external forces.
5. A wide variety of termination options
The product is available in a variety of configurations, including crimp‑type, straight‑insertion PCB‑mount, right‑angle‑insertion PCB‑mount, and surface‑mount PCB‑mount styles, allowing flexible adaptation to diverse installation and wiring requirements.
IV. Typical Application Scenarios
- Aerospace and Defense : Radar systems, missile control systems, satellite communication equipment, and more, designed to meet the stringent requirements of extreme operating conditions such as high‑g loads and vibration.
- High-end medical devices : Endoscope control consoles, portable monitors, and other devices meet stringent requirements for compact size and stable signal transmission.
- Industrial automation : High-precision servo motor controllers, robot joint drive boards, and other components ensure the accuracy and stability of signal transmission.
- Communications and Test Equipment : High-frequency test instruments and communication equipment, meeting the demands of centralized transmission for complex signals.
- Ships and Weapons : Internal electrical signal connections within the equipment and instrument compartment, designed to withstand harsh marine environments such as salt spray and vibration.
V. Model Naming Conventions
J20J ×-× × × ×-×-× (Additional Notes)
- Subject pronoun code :J20J
- Product Sub-Series : Not indicated — Aluminum housing, electroless nickel plating; S — Stainless steel housing, passivation
- Number of contacts : 9, 15, 21, 25, 31, 37, 51, 66, 74, 100 cores
- Types of Connectors and Contacts : TJ — plug with male pins; ZK — socket with female receptacles (TJ and ZK are fixed pairings)
- Termination type of the contact element : No designation — crimp connection; N — through-hole printed circuit board; W — right-angle through-hole printed circuit board; D — surface-mount printed circuit board
- Housing structure : Not indicated — free-end housing structure; P — vertically mounted structure; L — horizontally mounted structure
- Locking Assembly Type : JC — Locking screw; TH — Connecting nut
- Tail structure : Not indicated — Normal state; S — Shielded structure with tail cover
Note: The additional remarks are not part of the ordering code. When placing your order, please specify in parentheses the specifications of the crimped conductors, such as cross-sectional area, length, and color. For any special wiring requirements, please provide the wiring configuration.
VI. Summary
The J20J series micro‑rectangular electrical connectors, with their core advantages of high density, miniaturization, and exceptional reliability, are the ideal choice for high‑density electronic interconnect systems in aerospace, automotive, medical, and industrial automation applications—particularly in an era where lightweight design and system stability are paramount.
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Guizhou Gui'an New District Dongjiang Technology Co., Ltd.
Address: Building 23, Standard Factory Building, Southern Park, High-end Equipment Manufacturing Industrial Park, Gui'an New District, Guizhou Province
Telephone:0851-88121533
Fax: 0851-88308899
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