1. Protection level Standard (IP Code)
IP67/IP68: The most commonly used standard, IP67 is resistant to short-term water immersion (1 meter depth, 30 minutes),
IP68 is suitable for long-term underwater environments (depth and time defined by the manufacturer).
IP69K: Suitable for high pressure and high temperature washing environments (such as industrial cleaning or food processing equipment).
Application scenario: Outdoor, humid, dusty, or underwater environments require a higher IP level (such as IP68 or IP69K).
2. Industry-specific standards
Automotive sector:
USCAR-2 (Electrical Connector Performance Standard).
ISO 8092 (Road Vehicle Connector Standard).
Industrial field:
IEC 61076 (Circular connector standard for industrial equipment).
Railway: EN 50155 (Standard for the protection of electronic equipment in rail transit).
Military/Aviation: MIL-DTL-5015 (High reliability stringent environmental standard).
3. Interface types and compatibility
Common types:
M series connectors (such as M16, M20) : mainstream in the industrial field, anti-vibration, easy to plug and unplug.
RJ45 Waterproof: Network communication equipment interworking.
USB/IP68: Consumer electronics or portable devices.
Standardized interface: Ensure compatibility with existing equipment and avoid customization costs.
4. Material and mechanical properties
Shell material:
PC/ Nylon /PBT: Light weight, corrosion resistance, suitable for general industrial environment.
Metal (stainless steel/brass) : High mechanical strength, suitable for extreme temperature or vibration scenarios.
Sealing material: silicone or fluorine rubber sealing ring (high temperature resistance, aging resistance).
Shock/vibration resistance: In accordance with IEC 60068-2-6 (Vibration test) and other standards.
5. Electrical performance parameters
Rated voltage/current: Higher than the maximum load (for example, 16A/250V).
Contact resistance: Low resistance (<10mΩ) to reduce energy loss.
Insulation resistance: >100MΩ (prevent leakage).
Shielding performance: EMI/RFI shielding design is required (e.g. with metal housing or filtering function).
6. Certification and compliance
International certification: UL (Safety), CE (EU Compliance), RoHS (no hazardous substances).
Industry certification: TS16949 for automotive, ISO 13485 for medical.
Environmental requirements: no halogen, salt spray resistance (such as IEC 60068-2-11).
7. Ease of installation and maintenance
Connection mode: push-pull, thread locking (such as M16 thread to prevent falling off).
Tool-free installation: Some connectors support quick insertion and removal.
Maintainability: Whether field replacement of seals or contacts is supported.
8. Cost and supply chain
Value for money: Balance protection level with budget (e.g., IP67 may cost 30% less than IP68).
Supply stability: Choose mainstream brands (greenwaycs)
Recommendation selection process
1. Clear environmental requirements: temperature range, chemical exposure, mechanical stress, etc.
2. Match the IP level: Select the IP level based on the actual water immersion/dust prevention requirements.
3. Select an interface type: Ensure that the interface can communicate with the device and complies with industry standards.
4. Verify electrical parameters: voltage, current, signal integrity.
5. Check certification compliance: meet the target market regulations.
6. Test sample: waterproof and plug life test in real environment.
Example scenario:
Outdoor solar power supply: IP68M16 connector (UV resistance, high water resistance).
On-board charging equipment: USCAR-2 certified IP67 connector with seismic design.
Industrial robot: IP69K metal shell connector, support high frequency plug.