QJ 165C-2021
QJ · 2021
General technical requirements for aerospace electronic and electrical product assembly
规范
1Key Takeaways
This standard applies to the design, production, inspection and acceptance of aerospace electronic and electrical products. Other electronic and electrical products can also use it as a reference.
2Expert Interpretation
A comprehensive analysis of the technical highlights of the QJ165C-2021 standard, covering general requirements for the installation of aerospace electronic and electrical products, welding process specifications, electrostatic protection measures, excess material control systems and component installation standards, and comparing the main technical upgrades of the 2014 version.
Interpretation of the core content of the standard
| Technical dimensions | QJ165B-2014 | QJ165C-2021 | Upgrade points |
|---|---|---|---|
| Electrostatic protection | Basic protection requirements | Detailed operating specifications (4.7.1) | New requirements for the use of ion blowers |
| Welding process | General welding standards | Classification technical indicators (5.5.2) | Distinguishing between manual and automatic welding parameters |
| Environmental control | Basic requirements for temperature and humidity | Graded control (4.6) | Add 100000 grade clean area |
Detailed explanation of key technical specifications
1. Electrostatic protection system
Standard 4.7.1 clause constructs three-level protection:
- Personnel protection: Anti-static work clothes + wristband real-time monitoring
- Equipment protection: Soldering iron tip potential difference ≤2mV (4.4.6)
- Environmental protection: 30cm isolation distance + ion neutralization (4.7.1.4)
2. Welding process control
Typical case: BGA device welding must meet the following requirements:
- X-ray detection void area < 25% (5.5.3.2.3.6)
- Peak temperature 235℃ upper limit (5.5.2.1d)
- Solder ball spacing > electrical clearance (Figure 18)
Implementation suggestions
Key points of process verification
| Project | Verification method | Qualification standard |
|---|---|---|
| Pad wettability | GB/T4677-2002 8.2 | >95% (4.9.3) |
| Cleanliness | Surface ion test | ≤1.56μg/cm² (5.8.4.2) |
Standard Evolution Analysis
Technical iterations of previous versions:
- 1975 version: Establishing the basic framework
- 2014 version: Introducing SMT technology
- 2021 version: Strengthening process control (adding 11 quantitative indicators)
3Version History
QJ 165C-2021
current
5Citation Network
0
Cite this standard
7
Referenced herein
Referenced by QJ 165C-2021
GB/T 14020-2006
GB/T 3131-2001
GB/T 31475-2015
GB/T 32304
GB/T 4677-2002
GB/T 8145-2003
GB/T 9491-2002
6Frequently Asked Questions
What is QJ 165C-2021?
QJ 165C-2021 — General technical requirements for aerospace electronic and electrical product assembly is an international standard developed by Professional Standard - Aerospace. This standard applies to the design, production, inspection and acceptance of aerospace electronic and electrical products. Other electronic and electrical products can also use it as a reference.
What does QJ 165C-2021 cover?
This standard covers: This standard applies to the design, production, inspection and acceptance of aerospace electronic and electrical products. Other electronic and electrical products can also use it as a reference.
Who should use this standard?
This standard is intended for organizations, professionals, and stakeholders involved in various industries and sectors. It is applicable to manufacturers, service providers, regulatory bodies, and certification organizations.
What is the latest version of QJ 165C-2021?
The current published version is QJ 165C-2021, published on 2021. Always check for amendments or pending revisions.
How do I purchase QJ 165C-2021?
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